Delta Electronics RPI M50A_120, RPI M50A_122 Installation And Operation Manual

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Installation and Operation Manual

RPI M50A_120

RPI M50A_122

Europe

This manual applies for solar inverter models:

● RPI M50A_120 (with string fuses and surge protec-

tion devices)

● RPI M50A_122 (with string fuses only)

with rmware version: DSP: 1.31 / RED: 1.12 / COM: 98.26

The latest version of this manual is available at www.solar-inverter.com.

Delta Energy Systems (Germany) GmbH

Tscheulinstrasse 21

79331 Teningen

Germany

This manual is included with our solar inverter and is intended for use by the installer and end user.

The technical instructions and illustrations in this manual are to be treated as condential

and no part of this manual may be reproduced without prior written permission from Delta Energy Systems. Maintenance technicians and end users may not release the information contained in this manual, and may not use it for purposes not directly associated with the proper use of the solar power inverter.

All information and specications can be modied without prior notice.

Installation and Operation Manual for RPI M50A

Table of Contents

1. About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1 Purpose of this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.2 Target audience of this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Warnings and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.4 Conventions used in this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3. Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

4. Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.2 Components and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.3 Display, buttons, status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.4 String fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.5 Surge protection devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5.1 AC side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5.2 AC side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.6 Air inlets and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.7 Electrical connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.7.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.7.2 AC/DC disconnection switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.7.3 AC connector (AC output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.7.4 DC connectors (DC inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.7.5 Communication port 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.7.6 Communication port 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.7.7 Grounding connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.8 Information on the type label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5. Planning the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1 Where to mount the solar inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2 Outdoor installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.3 Ambient conditions and air circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.4 Temperature derating curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.5 Efciencycurve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.6 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.7 AC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.8 DC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.8.1 Symmetrical and asymmetrical power input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.8.2 Use with solar modules that do not need to be grounded. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.8.3 Use with solar modules that have to be grounded. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.8.4 Using DC1 and DC2 with only one MPP tracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.9 Connecting to a datalogger via RS485. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.10 Circuit diagram of string fuses and SPDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.11 What you need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2 Mounting the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.3 Grounding the inverter housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.4 Connecting to the grid (AC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.5 Connecting to the solar modules (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.5.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.5.2 Cablespecication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.6 Using DC1 and DC2 with only one MPP tracker (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.7 Connecting communication port I (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.7.1 RS485 and VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Installation and Operation Manual for RPI M50A

Table of Contents

6.7.2 Dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.7.3 Digital inputs and EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.8 Wiring communication port 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.8.1 First steps for all cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.8.2 Wiring a single inverter for RS 485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.8.3 Wiring multiple inverters for RS 485. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.8.4 Wiring the dry contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.8.5 Wiring the digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.8.6 Finishing the wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.9 Putting labels on the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

7. Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8. Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

8.2 Current grid settings (inverter information). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.3 Display language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

8.4 Date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.5 Baud rate for RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.6 Inverter ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8.7 Insulation mode and insulation resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.8 Grid settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

8.8.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

8.8.2 Voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

8.8.3 Frequency protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.8.4 Reconnection time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.8.5 P Ramp Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.9 EPO (External Power Off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

8.10 AC Connection type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8.11 Max. Power (Maximum feed-in power). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.12 Power limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.13 Power versus frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

8.14 Constant cos phi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

8.15 Cos phi (P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

8.16 Constant Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

8.17 Q (V) - Apparent power versus voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

8.18 FRT (Fault Ride Through) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9. Measurements and statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

9.1 Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

9.2 Energy log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

9.3 Event log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

9.4 Inverter information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

10. Error messages and trouble shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

10.1 Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

10.2 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

10.3 Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

11. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

11.1 Regular maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

11.2 Replacing the fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

11.3 Cleaning the fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.4 Cleaningtheairlters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

11.5 Replacing surge protection devices (SPD) on the DC side . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

11.6 Replacing surge protection devices (SPD) on the AC side . . . . . . . . . . . . . . . . . . . . . . . . . . .100

11.7 Replacing string fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

12. Decommissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

13. Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Installation and Operation Manual for RPI M50A

1. About this manual

1.1 Purpose of this manual

This manual is part of the inverter and will help you become familiar with the inverter.

Always follow the safety instructions given in this manual. You can help keep the product durable and reliable during its use by handling it carefully.

Read the manual carefully and thoroughly and follow the instructions contained therein. This manual contains important information on the installation, commissioning and operation of the solar inverter.

Always follow the general safety instructions (see

“2 General safety instructions”, p. 7).

Store the manual in a safe place near the inverter, so that installer and operator have easy access to this manual.

The solar inverter can be safely and normally operated if installed and used in accordance with this manual. Delta Energy Systems is not responsible for damage incurred by failure to comply with the installation and operating instructions in this manual.

1.3 Warnings and symbols

Where hazards may arise when working with the solar inverter, the following hazard levels and symbols are used to indicate these hazards:

DANGER

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

ATTENTION is used to address practices not related to physical injury.

1.2 Target audience of this manual

This manual is aimed at qualied electricians who have received a sufcient training to apply safe meth-

ods of work to install a micro-generator in compliance with the requirements of the applying standard.

Only chapter “9 Measurements and statistics”,

p. 85 is relevant to the operator. All other activities

may only be performed by qualied electricians.

A note provides general information on using the solar inverter. A note does not indicate hazardous situations.

Where required, further, supplementary warning symbols are used. Type and source of the hazard is explained in the safety instructions or warnings.

This symbol is a warning of a risk of electric shock due to high voltage.

The symbol is a warning of a hot surface.

This symbol is a warning of general hazards.

Installation and Operation Manual for RPI M50A

1. About this manual

1.4 Conventions used in this manual

Order of instructions

Numbered instructions must be performed in the

specied order.

1. First instruction step

→ When the solar inverter reacts to a step, this

reaction is marked with an arrow.

2. Second instruction step

3. Third instruction step

Instructions consisting of only one step or when the order of the instruction steps is not important, are shown as follows:

► Instruction step ► Instruction step

Device buttons and LEDs

Device buttons and LEDs are shown in this manual as follows:

Buttons on the solar inverter:

LEDs on solar inverter:

LED symbol Meaning

Information on Display

Information shown on the solar inverter display includes menus, settings and messages.

This information is shown in this manual as follows:

Menu names: User settings menu

Parameter names: Cos phi parameter.

AlArm LED

LED stays on.

LED ashes.

LED is off.

ESC

button.

Installation and Operation Manual for RPI M50A

2. General safety instructions

DANGER

High electrocution

Potentially fatal voltage is applied to the solar inverter during operation. This potentially fatal voltage is still present for 10 seconds after all power sources have been disconnected.

► Always disconnect the inverter from

power before installation, open the AC/DC isolating switch and make sure neither can be accidentally reconnected.

► Only the cover from the fuse section

may be removed. Never open other parts of the inverter.

► Wait at least 10 seconds until the

capacitors have discharged.

DANGER

High electrocution

Potentially fatal voltage may be applied to the DC connections of the solar inverter. When light is falling on solar modules, they immediately start producing energy. They do so, even when the sun is not shining.

► Never disconnect the solar modules

when the solar inverter is powered.

► First switch off the grid connection

so that the solar inverter cannot feed energy into the grid.

► Turn the AC/DC isolating switch to

position OFF.

► Make sure the DC connections can-

not be accidentally touched.

WARNING

High electrocution

When you remove the cover from the fuse section, protection degree is no longer IP65.

► Remove the cover only when it is

really necessary.

► Do not remove the cover when it is

raining and the inverter is wet.

► Close the cover tightly after work.

● The solar inverter can be safely and normally

operated if installed and used in accordance with this manual (see IEC 62109-5.3.3). Delta Energy Systems is not responsible for damage incurred by failure to observe the installation and operating instructions in this manual. For this reason, be sure to observe and follow all instructions!

● Installation and commissioning may only be per- formed by qualied electricians using the installation and commissioning instructions found in this manual.

● The solar inverter must be disconnected from power and the solar modules before any work on it can be performed.

● The solar inverter has a high leakage current value. The ground wire must be connected before commissioning.

● Do not remove any warning signs that the manu- facturer has installed on the solar inverter.

● Improper handling of the solar inverter may result in physical injury and damage to property. For this reason, observe and follow all general safety instructions and warnings.

● The solar inverter contains no components that must be maintained or repaired by the operator or installer. All repairs must be performed by Delta Energy Systems. Opening the cover will void the warranty.

● Do not disconnect any cables when the solar inverter is powered due to risk of a fault arc.

● To prevent lightning strikes, follow the relevant regulations applicable in your country.

● The surface of the solar inverter can become very hot during operation. Use safety gloves when working on the solar inverter.

● The solar inverter is very heavy. The solar inverter must be lifted and carried by at least three people.

● Only devices in compliance with SELV (EN 69050) may be connected to the RS485 and USB interfaces.

● All connections must be sufciently insulated in order to comply with the IP65 protection rating. Unused connections must be closed by placing cover caps on the solar inverter.

Installation and Operation Manual for RPI M50A

3. Intended use

The solar inverter may only be used as intended.

Proper use of the solar inverter meets the following criteria:

● Use in stationary PV systems connected to the

local power grid for converting the direct current in the PV system to alternating current and feeding it into the grid

● Use within the specied power range (see

“13 Technical data”, p. 105) and under the

specied ambient conditions (see “5 Planning the

installation”, p. 18).

Any of the following uses of the solar inverter is considered improper:

● Isolated operation. The solar inverter has anti-

islanding and other monitoring features.

● Use in mobile PV systems.

Installation and Operation Manual for RPI M50A

3. Intended use

Installation and Operation Manual for RPI M50A

4. Product overview

Europe

4. Product overview

4.1 Scope of delivery

Part Qty Image/Description Part Qty Image/Description

Inverter 1

DC bus bar 2 Used when the solar mod-

ules have to be grounded and for connecting the two DC inputs to one MPP tracker.

Mounting plate 1 DC Fuse holder 1 Used when the solar mod-

ules have to be grounded.

AC plug 1 China Aviation Optical-

Electrical Technology Co. PVE5T125KE36

Screw for grounding the inverter housing

1 An appropriate screw with

washer, washer spring and toothed ring is already mounted to the inverter

DC plugs 10 Multi-Contact MC4 plug for

DC+ (32.0017P0001-UR for

4/6 mm

)

10 Multi-Contact MC4 plug for

DC– (32.0016P0001-UR for 4/6 mm2)

Quick Installation Guide and General Safety Instructions

Installation and Operation Manual

RPI M50A

Installation and Operation Manual for RPI M50A

4.2 Components and connectors

4. Product overview

No. Component / connector Description

Display, buttons, status LEDs See “4.3 Display, buttons, status LEDs”, p. 12

String fuses and AC/DC overvoltage protection

Air inlets See “4.5 Air inlets and fans”, p. 13

Electrical connectors See “4.6 Electrical connectors”, p. 14

Fans See “4.5 Air inlets and fans”, p. 13

Type label See “4.7 Information on the type label”, p. 17

See “4.4 String fuses and AC/DC surge protection

device”, p. 12

Installation and Operation Manual for RPI M50A

4. Product overview

GrID

AlArm

4.3 Display, buttons, status LEDs

Alarm

Grid

ESC ENT

Label Designation Usage

LEDs

Buttons

ESC

ENT

Grid Green; lights up when the inverter feeds into the grid

Alarm Red; indicates and error, fault, or warning

Escape Exit current menu. Cancel value setting.

Move down Move downwards in menu. Set value (decrease).

Move up Move upwards in menu. Set a value (increase).

Enter

Select menu item. Open con gurable value for editing. Finish editing

(adopt set value).

4.4 String fuses

The RPI M50A is equipped with string fuses on the DC side.

Type

Manufacturer Littelfuse

Part number 0SPF015.T

Rate current 15 A

Rate voltage 1000 V

Manufacturer Hollyland

Part number 10GPV15UO

Rate current 15 A

Rate voltage 1000 V

Installation and Operation Manual for RPI M50A

4. Product overview

4.5 Surge protection devices

4.5.1 AC side

The M50A_120 additionally has surge protection devices type 2 on the AC and the DC side.

Type

Manufacturer GEHE

Part number GPU1-C40/690

Voltage U

Current I

Voltage U

max

690 V

15 kA (8/20)

30 kA (8/20)

≤ 2.5 kV

4.6 Air inlets and fans

Air is intaken from the environment through the air inlets on the upper left and upper right side of the

inverter. The air is used to cool the inverter. The warmed-up air is ejected at the fans on the bottom side of the inverter.

For a detailed description of the cooling principle, see

“5.3 Ambient conditions and air circulation”, p. 19.

For a detailed description how to clean or replace the fans, see “11. Maintenance”, p. 95.

4.5.2 AC side

The M50A_120 additionally has surge protection devices type 2 on the AC and the DC side.

Type

Manufacturer GEHE

Part number GPU1-ZS1000*

Voltage U

Current I

Voltage U

max

1120 V

20 kA (8/20)

40 kA (8/20)

≤ 3.9 kV

Installation and Operation Manual for RPI M50A

4. Product overview

4.7 Electrical connectors

4.7.1 Overview

1 2 3 4

+– +– +– +–

DISCONN.

AC/DC

DC 1 DC 2

AC OUTPUT DC INPUT

OFF

6 5

Fig. 4.1: Overview electrical connectors

No. Component / connector Description

AC/DC disconnection switch See “4.6.2 AC/DC disconnection switch”, p. 15

AC connector (AC output) See “4.6.3 AC connector (AC output)”, p. 15

DC connectors (DC inputs) See “4.6.4 DC connectors (DC inputs)”, p. 15

Communication port 1 See “4.6.5 Communication port 1”, p. 15

COMM.

Communication port 2 See “4.6.6 Communication port 2”, p. 16

Grounding screw See “4.6.7 Grounding connection”, p. 16

Installation and Operation Manual for RPI M50A

4. Product overview

+– +– +– +–

+–

4.7.2 AC/DC disconnection switch

OFF ON

DISCONN AC/DC

The inverter is disconnected from the grid (AC) and the solar modules (DC) when the AC/DC disconnec- tion switch is in position OFF.

OFF ON

DISCONN AC/DC

4.7.4 DC connectors (DC inputs)

DC 1 DC 2

DC INPUT

The DC connectors (DC inputs) are used for connecting inverter to the solar module string(s).

Connector type:

● Multi-contact MC4

● 10 pairs with female socket for DC+ and male

socket for DC–.

● 10 pairs of plugs are delivered with the inverter

For technical specications, see “13. Technical data”,

p. 105.

4.7.5 Communication port 1

The inverter is connected to the grid (AC) and the solar modules (DC) when the AC/DC disconnection switch is in position ON.

4.7.3 AC connector (AC output)

DISCONN.

AC/DC

AC OUTPUT

OFF

The AC connector is used for connecting the inverter to the grid.

Usage of the AC connection:

● Feeding AC current into the grid.

● Powering up the display when no DC voltage is

available via the DC connectors (DC inputs).

The inverter can be connected to:

COMM.

Functions of Communication port 1:

● 1 x RS485 in/out (e.g. for connecting to a datalog-

ger)

● 6 x Digital inputs (e.g. for connecting to a ripple

receive controller)

● 2 x Dry contacts (e.g. for connecting to an exter-

nal relais)

● 1 x VCC contacts (e.g. for connecting to an exter-

nal relais)

For a detailed description, see “6.7 Connecting com-

munication port I (optional)”, p. 45.

● 5-wire grid sytems 3P4W (L1, L2, L3, N, PE)

● 4-wire grid systems 3P3W (L1, L2, L3, PE).

AC plug type:

China Aviation Optical-Electrical Technology Co. PVE5T125KE36

The AC plug is delivered with the inverter.

Installation and Operation Manual for RPI M50A

4. Product overview

+–

DISCONN.

4.7.6 Communication port 2

COMM.

Communication port 2 is not available on this inverter.

4.7.7 Grounding connection

AC/DC

The grounding connection is used for grounding the housing of the inverter.

The grounding screw (M6) with washer spring, washer and toothed ring is already mounted to the inverter.

For a detailed description, see “6.3 Grounding the

inverter housing”, p. 39.

Installation and Operation Manual for RPI M50A

4.8 Information on the type label

Fig. 4.2: RPI M50A_120 type label Fig. 4.3: RPI M50A_122 type label

Information on type label Description

This inverter has no transformer.

Risk of death by electrocution

Potentially fatal voltage is present when the inverter is in operation that remains for 10 seconds after being disconnected from power.

10 s

Never open the inverter. The inverter contains no components that must be maintained or repaired by the operator or installer. Opening the cover will void the warranty.

4. Product overview

Read the manual delivered with the inverter before working with the inverter and follow the instructions contained in the manual.

The housing of the inverter must be grounded if this is required by local regulations.

DC Input

200-1000Vdc DC input voltage range

MPPT 520-800Vdc MPP input voltage range with full power (with symmetrical load)

1000Vdc Maximum DC input voltage

50A*2 max. Maximum DC input current per DC input (50 A for each DC input)

Isc: 60A*2 max. DC short circuit current

AC Output

220/380, 230/400 Vac AC Nominal voltage

3P3W or 3P4W The inverter can be connected to 3-wire systems (3 phases + PE) and 4-wire sys-

tems (3 phases + N + PE)

50/60 Hz AC Nominal frequency

50kW nom. Nominal active power

55kW/55kVA Maximum active/reactive power

80A max. Maximum AC current

cos φ 0.8 ind ~ 0.8 cap Range of cos φ

IP Code: IP65 (Electronics) Protection degree for the electronics according to EN 60529

Protective Class: I Safety class according to EN 61140

AC Over voltage category: III AC overvoltage category according to IEC 62109-1

Installation and Operation Manual for RPI M50A

5 Planning the installation

✔

✘ ✘

5. Planning the installation

NOTE

This chapter is for planning the installation only and is not related to do any real actions.

Some of the actions can be dangerous. Chapter “6. Installation”, p. 37 describes all actions and the possibly related risks in detail.

5.1 Where to mount the solar inverter

Fig. 5.2: Where to mount the inverter 2

► Mount the solar inverter so that the LEDs and dis-

play can be easily seen and that the buttons can be operated. Make sure the reading angle and

installation height are sufcient.

74 kg

Fig. 5.1: Where to mount the inverter 1

► The solar inverter is very heavy. The solar inverter

must be lifted and carried by at least three people.

► Always use the mounting plate supplied with the

solar inverter.

► Check that the wall is capable of bearing the

heavy load of the device.

► Use dowels and screws that are suitable for the

wall material and the heavy weight.

► Mount the solar inverter on a vibration-free wall to

avoid disruptive vibrations.

► Possible noise emissions can be disruptive when

the device is used in living areas or in buildings with animals. Therefore, choose your installation location carefully.

Fig. 5.3: Mounting orientation

► Mount the solar inverter vertically.

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.2 Outdoor installations

Fig. 5.4: Outdoor installations

► The solar inverter has protection degree IP65 and

can be installed indoors or in protected outdoor areas (that means outdoor but protected by a roof against direct sun, rain or snow).

5.3 Ambient conditions and air circulation

>20 cm

>30 cm>30 cm >30 cm

>80 cm

Fig. 5.5: Mounting distances and air circulation

► Ensure adequate air circulation. Hot air must be

able to dissipate downward. Keep enough space around each inverter.

► Do not install inverters directly above one another.

Otherwise, the lower inverter is warmed up by the upper one.

► Consider the operating temperature range (see

“13. Technical data”, p. 105).

When the operating temperature range is exceeded, the solar inverter reduces the amount of power generated.

Installation and Operation Manual for RPI M50A

Fig. 5.21: Air ﬂ ow around solar inverter

5 Planning the installation

5.4 Temperature derating curves

P/P

(Pn = 50 kW)

115%

110%

105%

100%

95%

90%

S [VA] = P [W]

800 V 600 V 520 V

85%

80%

75%

70%

65%

60%

55%

50%

25 30 35 40 45 50 55 60

Ambient temperatures [°C]

Fig. 5.6: Temperature derating curve (cos φ = 1.0)

Installation and Operation Manual for RPI M50A

P/P

Ambient temperatures [°C]

(Pn = 50 kW)

115%

110%

105%

100%

95%

90%

85%

5 Planning the installation

P [W]S [VA]

800 V 600 V 520 V

80%

75%

70%

65%

60%

55%

50%

25 30 35 40 45 50 55 60

Fig. 5.7: Temperature derating curve (cos φ = 0.95)

Installation and Operation Manual for RPI M50A

5 Planning the installation

Ambient temperatures [°C]

P/P

(Pn = 50 kW)

115%

110%

105%

99%

95%

90%

85%

800 V 600 V 520 V

P [W]S [VA]

800 V

600 V

520 V

80%

75%

70%

65%

60%

55%

50%

25 30 35 40 45 50 55 60

Fig. 5.8: Temperature derating curve (cos φ = 0.90)

Installation and Operation Manual for RPI M50A

5.5 Efciency curve

Efficiency

100%

99%

98%

97%

96%

95%

94%

5 Planning the installation

800 V

600 V

520 V

93%

92%

15 2050 10 25 30 35 40 45 50

Power [kW]

Fig. 5.9: Efciency curve

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.6 Dimensions

107

158.7

172.8

Fig. 5.10: Dimensions of mounting plate

612 278

460

Fig. 5.11: Dimensions of inverter

740

Installation and Operation Manual for RPI M50A

5 Planning the installation

G N L1 L3L2

To solar inverter AC

plug

5.7 AC connection

Always adhere to the specic regulations applicable in

your country or region.

Always adhere to the specic regulations dened by

your grid operator.

For the safety of the user and for the security of your installation, install required safety and protection devices that are applicable for your installation environment (example: automatic circuit breaker and/or overcurrent protection equipment).

Use the proper upstream circuit breaker to protect the inverter:

Model Upstream Circuit Breaker

RPI M50A 100 A

NOTE

The value of the tripping current mainly depends on the quality of the solar modules, the size of the PV array and environmental conditions (e.g. humidity). The tripping current of the residual current device must not be less than

the specied minimum tripping current.

Permitted earthing systems

Earthing

System

Permitted Yes Yes Yes Yes No

AC grid voltage requirements

3P3W 3P4W

L1-L2 400 V

L1-L3 400 V

L2-L3 400 V

TN-S TN-C TN-C-S TT IT

± 20% L1-N 230 VAC ± 20%

± 20% L2-N 230 VAC ± 20%

± 20% L3-N 230 VAC ± 20%

Fig. 5.12: Where to place upstream circuit breakers

in the system

The inverter is not capable of feeding in DC residual currents due to its design. It fullls this requirement in accordance with DIN VDE 0100-712.

The possibilities of faults were examined by Delta without taking the integrated RCMU (residual-current monitoring unit) into account. When examining these faults in terms of the current valid installation standards, no danger in combination with a type A upstream residual-current device (RCD) can occur. Therefore faults that would otherwise require the use of a type B residual-current device due to the inverter can be excluded.

The integrated all-pole sensitive RCMU is certied

according VDE 0126 1-1/A1:2012-02 §6.6.2 for a tripping current of 300 mA. RCD Type A can be used for this inverter, according to the following table.

M50A

Minimum tripping current of the

mA ≥300

RCD

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.8 DC connection

NOTICE

Machine and equipment damage may occur.

Exceeding the maximum current per DC input can cause an overheating of the DC inputs.

► Always consider the maximum current of the DC inputs when planning the installation.

5.8.1 Symmetrical and asymmetrical power input

The inverter operates using two separate MPP trackers that can handle both symmetrical and asymmetrical power input. This allows you to set up complex PV system designs. For example: east/west-facing roof (asymmetric load) or a south facing roof such as a dormer (asymmetrical load).

Total

East Roof

West Roof

East West

8:00 13:00 18:00

Fig. 5.13: Concept of 2-MPP-tracker system for asymmetrical power input

The following gures explain how symmetrical and asymmetrical power input is handled:

Symmetrical power input Asymmetrical power input

Input Current

max

Max. Power MPPT Range

Input Current

max

Max. Power MPPT Range

startup

max

startup

Input Voltage

Input Current DC 1 Input Current DC 2

Fig. 5.14: I-U curve for symmetrical and asymmetrical power input (schematic diagrams)

Installation and Operation Manual for RPI M50A

max

Input Voltage

5 Planning the installation

COMM.

For currents and voltages see “13. Technical data”, p. 105.

5.8.2 Use with solar modules that do not need to be grounded.

When you use PV modules that do not need to be grounded, you can connect the DC inputs separately or in parallel.

“Separate DC inputs” means each DC input is connected to a separate MPP tracker. “Parallel DC inputs” means both DC inputs are connected to one MPP tracker. With parallel DC inputs you cannot realize asymmetrical power inputs.

PV arrays can be connected to the inverter directly or externally parallel connection at DC distribution box.

PV array

AC wiring

3P3W 3P4W 1 - L1

2 - L2 3 - L3 4 - N

1 - L1 2 - L2 3 - L3

- PE

5 - PE

DISCONN.

AC/DC

OFF

DC wiring

+– +– +– +–

DC 1 DC 2

AC OUTPUT DC INPUT

Fig. 5.15: System design with ﬂ oating DC inputs

Separate or

parallel DC inputs

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.8.3 Use with solar modules that have to be grounded.

NOTICE

Machine and equipment damage

may occur.

► When the DC inputs are grounded,

all of the strings must be connected in parallel and then connected to the inverters.

► Additionally, an external isolation

transformer must be installed on the AC side, otherwise, damage will result and the inverter will not work properly.

When the DC inputs are grounded, all of the strings must be connected in parallel and then connected to the inverter(s).

When the solar modules need to be grounded, an external isolation transformer has to be implemented to the AC side of the PV system as shown in Fig.

5.16, p. 28.

Depending on the DC connection type, different settings for insulation detection are needed, see “8.7

Insulation mode and insulation resistance”, p. 59.

You have to prepare the inverter for use with grounded solar modules, see Fig. 5.17, p. 29 and

Fig. 5.18, p. 30. Because you have to remove the

cover of the fuse section, you should do this before you hang the inverter on the wall and do it in a dry environment. For a detailed description how to do this, see “6.5 Connecting to the solar modules (DC)”,

p. 42.

PV array

AC wiring

3-phase, 230/400 V

star or delta connection

Isolated transformer

Inverter

230/400 V

3P3W 3P4W 1 - L1

2 - L2 3 - L3 4 - N

5 - PE

Utility

OFF

1 - L1 2 - L2 3 - L3

- PE

Distribution Box

–

+– +– +– +–

DC wiring

Positive grounding

Negative grounding

Parallel DC inputs only

DISCONN.

AC/DC

AC OUTPUT DC INPUT

DC 1 DC 2

COMM.

Fig. 5.16: System design with positive or negative grounding of the solar modules

Installation and Operation Manual for RPI M50A

1 x

5 Planning the installation

DC1+

DC2+

1 x

Grounding fuse (1 A)

Fig. 5.17: Preparing the inverter for use with minus grounded solar modules

Fuse holder and DC bus bars are delivered with the inverter. The screws are already fastened inside the inverter. You have to provide a grounding fuse with 1 A.

DC1-

DC bus barFuse holder

DC2-

Installation and Operation Manual for RPI M50A

5 Planning the installation

1 x

DC1+

DC2+

2 x

Grounding fuse (1 A)

Fig. 5.18: Preparing the inverter for use with plus grounded solar modules

Fuse holder and DC bus bars are delivered with the inverter. The screws are already fastened inside the inverter. You have to provide a grounding fuse with 1 A.

DC1-

DC bus barsFuse holder

DC2-

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.8.4 Using DC1 and DC2 with only one MPP tracker

When you want to use DC1 and DC2 with only one MPP tracker, you have to prepare the inverter as shown in

Fig. 5.19, p. 31.

Because you have to remove the cover of the fuse section, you should do this before you hang the inverter on the wall and do it in a dry environment.

DC1+

DC2+

DC1-

DC2-

Fig. 5.19: Preparing the inverter for use with only one MPP tracker

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.9 Connecting to a datalogger via RS485

The inverter can be connected to a datalogger via RS485, e.g. for monitoring, changing settings or software updates.

To ensure the proper work of the data connection, consider the following recommendation and instructions.

For a detailed description how to perform the activities described in this section, see “6.7 Connecting commu-

nication port I (optional)”, p. 45.

When you connect a single inverter

● The termination resistor has to be switched on.

When you connect multiple inverters within the same PV system

● On the last inverter in the chain, the termination

resistor has to be switched on.

● If your datalogger has no internal termination re-

sistor, the termination resistor on the rst inverter in the chain has to be switched on too.

● To each inverter a different inverter ID has to be

applied. This is necessary, so that the datalogger or the maintenance software can identify each inverter in the chain.

● The baud rate has to be the same on each in-

verter.

Cable and wire requirements

● Twisted and shielded cables with 2 solid wires.

● Cable diameter: 5 mm

● Wire cross-section: 1 mm

● The RS485 cables should lay with distance from

the AC cable and the DC cables to avoid interferences.

Installation and Operation Manual for RPI M50A

5.10 Circuit diagram of string fuses and SPDs

DC1+

DC1–

5 Planning the installation

DC2+

DC2–

DC side AC side

Overvoltage protection category II Overvoltage protection category II

Fig. 5.20: Circuit diagram string fuses and surge protection devices

Installation and Operation Manual for RPI M50A

5 Planning the installation

5.11 What you need

Beside the parts delivered with the inverter (see “4.1 Scope of delivery”, p. 10), you may need the following addititional parts and tools.

Part Quantity Image/Description

For mounting the inverter

M6 mounting screws 12 The mounting plate has to be mounted with 12 M6 screws.

Depending on where you mount the inverter (e. g. on a brick wall, concrete wall, metal frame etc.) you may need additional mounting material.

This could be:

Wall plugs, washers, washer springs, nuts etc.

For connecting the inverter to the grid (AC)

AC cable - Use properly sized wire to connect to the correct poles (see table)

China Aviation

AC connector

Optical-Electrical Technology Co. PVE5T125KE36

Current rating 100 A

Min. / Max. cable diameter 37 ... 44 mm

Min. / Max. wire size 25 ... 35 mm

Recommended torque for terminal screws

3 Nm

AC plug delivered with the inverter can be used with exible copper

cable.

When calculating the cross section of the cable, consider:

● material used

● thermal conditions

● cable length

● type of installation

● AC voltage drop

● power losses in cable

Always follow the system installation requirements dened for your

country!

France: Follow the system installation requirements dened by UTE

15-712-1 regarding minimum cable sections and protections against overheating due to high currents!

Germany: Follow the system installation requirements dened by VDE

0100 712 regarding minimum cable sections and protections against overheating due to high currents!

For a description how to connect the AC cable to the AC connector see “6.4 Connecting to the grid (AC)”, p. 40.

Installation and Operation Manual for RPI M50A

Part Quantity Image/Description

5 Planning the installation

Wire ferrules (bootlace pins) and crimping tool

4 or 5 Wire ferrules are needed for the wires of the AC cable to tightly mount

them to the AC connector.

4 (for 3-wire systems with 3 phases + PE)

5 (for 4-wire systems with 3 phases + N + PE)

You should use a crimping tool to fasten the wire ferrules to the wire.

For connecting the inverter to the solar modules (DC)

DC cable and DC plugs

10 pairs of DC plugs for the DC cable are delivered with the inverter: 32.0016P0001-UR and

32.0017P0001-UR. Follow the description in the table below if you need additional DC plugs.

DC connectors on the

Plugs for DC cable

inverter

DC–

a b

4 / 6

10 5.5-9 32.0034P0001

3–6 32.0014P0001-UR

5.5-9 32.0016P0001-UR

Multi-Contact

4 / 6 3-6 32.0015P0001-UR

5.5-9 32.0017P0001-UR

DC+

10 5.5-9 32.0035P0001

Safety caps up to 20 Safety caps secure the DC cables to the DC inputs so that they can-

not be removed without a special tool. To remove the safety caps, an open end spanner is needed. The safety caps must be used in France. Please check local regulations whether you have to use safety caps.

Installation and Operation Manual for RPI M50A

5 Planning the installation

WARNING

Dual Supply

Do not work on this equipment until it is isolated from

both mains and on site generation supplies

Isolate on-site Generating Unit(s) at ………………………………………………….

Isolate mains supply at………………………………………………………

Warning – Only persons authorised by the DNO may remove the main cut out fuse

Part Quantity Image/Description

Open end spanner 1 The open end spanner is used to disconnect the DC cables from the

DC inputs.

For grounding the inverter housing

Cables Typically yellow/green copper cable with minimum wire size 6 mm

has to be used. Always consider local regulation regarding the cable requirements.

For wiring the communication port

Cables Depending on which connectors you want to use (RS485, dry con-

tacts, digital inputs), you need the appropriate cables with wire size

1 mm

For using the inverter with grounded solar modules

Magnetic screw driver 1 If you need to open the cover of the fuse section, you should use a

magnetic screw driver, so that the screws cannot accidentally fall into the inverter.

Grounding fuse 1 A grounding fuse with 1 A is needed. The fuse holder is delivered with

the inverter.

Other parts

Labels - Check local regulations whether you have to attach special safety

labels to the inverter.

Isolate both sources before

carrying out any work

Warning

Two sources of voltage present

- distribution network

- photovoltaic panels

Installation and Operation Manual for RPI M50A

6. Installation

6.1 Safety instructions

DANGER

High electrocution

Potentially fatal voltage is applied to the solar inverter during operation. This potentially fatal voltage is still present for 10 seconds after all power sources have been disconnected.

► Always disconnect the inverter from

power before installation, open the AC/DC isolating switch and make sure neither can be accidentally reconnected.

► Only the cover from the fuse section

may be removed. Never open other parts of the inverter.

► Wait at least 10 seconds until the

capacitors have discharged.

6 Installation

WARNING

High electrocution

When you remove the cover from the fuse section, protection degree is no longer IP65.

► Remove the cover only when it is

► Do not remove the cover when it is

► Close the cover tightly after work.

WARNING

Heavy weight

The inverter weighs about 73 kg.

► The inverter must be lifted and car-

Read chapter “5. Planning the installa-

tion”, p. 18 and this chapter before

you start installation.

really necessary.

raining and the inverter is wet.

ried by at least three people or with an appropriate lifting equipment.

Installation and Operation Manual for RPI M50A

6 Installation

6.2 Mounting the inverter

WARNING

Heavy weight

► The inverter must be lifted and car-

ried by at least three people or with an appropriate lifting equipment.

► Always use the mounting plate

delivered with the inverter.

Read chapter “5. Planning the installa-

tion”, p. 18 before you start installa-

tion.

1. Attach the mounting plate with 12 M6 screws to

the wall or to your mounting system. Use the ap-

propriate type and number of screws.

3. Check that the rail of the solar inverter hangs cor-

rectly in the mounting plate.

2. Hang the solar inverter onto the mounting plate.

4. Check that the bottom of the inverter is  rmly po-

sitioned against the wall or the mounting system.

Also check that the inverter hangs vertically in all

directions.

Installation and Operation Manual for RPI M50A

6.3 Grounding the inverter housing

Typically yellow/green copper cable with minimum wire size 6 mm2 has to be used.

Always consider local regulation regarding the cable requirements.

Even when such regulations do not exist, it is usually a good idea to ground the inverter housing for safety reasons before you set-up the electricial connections. Although there is an PE connection within the AC connection.

1. On the left side, ground the inverter housing. The

grounding screw is delivered with the inverter and

mounted to the inverter.

6 Installation

Toothed ring

Grounding cable

Washer

Washer spring

M6 Screw

Installation and Operation Manual for RPI M50A

6 Installation

6.4 Connecting to the grid (AC)

Read chapter “5. Planning the installa-

tion”, p. 18 before you start installa-

tion.

What you need

● AC plug (delivered with the inverter)

● AC cable

● Wire ferrules (bootlace pins)

● Crimping tool for wire ferrules

Wiring for 3P4W grid systems: 3 phases with 5 wires (L1, L2, L3, N) + PE

Important information regarding safety

DANGER

Risk of death or serious injury from electrocution

► Set the AC/DC disconnection switch

to position OFF before connecting or disconnecting the AC plug to the inverter.

OFF ON

DISCONN AC/DC

Use wire end sleeves (bootlace pins) on each wire.

L3N

L2PE

L1 L2 L3 N PE

Fig. 6.26: Wiring AC plug for 5-wire systems

Wiring for 3P3W grid systems: 3 phases with 4 wires (L1, L2, L3) + PE

L3N

L2PE

L1 L2 L3 PE

Use wire end sleeves (bootlace pins) on each wire.

Fig. 6.27: Wiring AC plug for 4-wire systems

Installation and Operation Manual for RPI M50A

6 Installation

ATTENTION

Observe the correct polarity of the AC

plug. An incorrect con guration can

destroy the solar inverter.

1. Remove the cable sheath as shown and remove

12 mm of insulation from each wire end.

52.5 mm

10 mm

PE: 57.5 mm

2. Place the end sleeves on the exposed wire ends

and crimp them on.

► Slide the wires of the AC cable into the connec-

tions in the pin insert and screw tight. Observe the correct phase sequence when doing this.

► Screw the nut

➀, cable housing ➁ and pin insert

➂ together. Tighten the nut to 5 Nm and the cable

housing to 1-2 Nm.

► Insert the AC plug into the AC socket ➁ on the

solar inverter and tighten the locking ring ➀ to a torque of 6 to 8 Nm.

3. Connect the AC cable to the AC plug as described

below.

► Unscrew the nut and cable housing from the

socket insert.

► Slide the nut and cable housing onto the AC

cable.

► Fit a cable strain-relief clamp directly behind the

round plug when using cables of diameters between 11 and 13 mm. We recommend also using a strain-relief clamp for cables of other diameters.

Installation and Operation Manual for RPI M50A

6 Installation

DC 2

6.5 Connecting to the solar modules (DC)

Read chapter “5. Planning the installa-

tion”, p. 18 before you start installa-

tion.

6.5.1 Safety instructions

OFF ON

DISCONN AC/DC

DANGER

Risk of death or serious injury from electrocution

► Never disconnect the solar modules

when the solar inverter is powered.

► First switch off the grid connection

so that the solar inverter cannot feed energy into the grid.

► Turn the AC/DC isolating switch to

position OFF.

► Make sure the DC connections cannot

be accidentally touched.

NOTICE

Machine and equipment damage may occur.

Exceeding the maximum current per DC input can cause an overheating of

the DC inputs.

► Always consider the maximum cur-

rent of the DC inputs when planning the installation.

6.5.1.1 Polarity of the solar modules

Check the polarity of the DC voltage before you connect the solar modules. The negative DC pole of the string is connected to the DC-MINUS connector; the positive DC pole to the DC-PLUS connector, see “Fig.

6.22: Considering the polarity of the solar modules”, p. 42.

–

–+ –+ +

DC 1

DC INPUT

Fig. 6.22: Considering the polarity of the solar mod-

ules

6.5.2 Cable speciﬁ cation

Cable colors

NOTICE

Improperly sized PV array.

An improperly sized PV array can cause damage to the inverter.

► Consider the technical speci ca-

tions of the inverter (input voltage range, maximum currents and maximum input power, see “13. Techni-

cal data”, p. 105) when planning

the size of the PV array.

Penetrating humidity.

Humidity can penetrate through unused DC connectors into the inverter.

► To ensure protection degree IP65,

protect all unused DC connectors with the caps delivered with the inverter.

Use a red cable for DC+ and a black cable for DC–.

Fig. 6.23: Colors for DC cables

Installation and Operation Manual for RPI M50A

6 Installation

Connector types

The Multi-Contact MC4 are delivered with the inverter. The plugs can also be ordered from Multi-Contact at www.multi-contact.de. The required size depends on the wire cross-section and thickness of the cable used.

DC connector type on the inverter

The DC-MINUS connector is a male socket.

The DC-PLUS conenctor is a male socket.

Counterpiece required for the cable

A female plug is required for the black DC cable.

A male plug is required for the red DC cable.

6.6 Using DC1 and DC2 with only one MPP tracker (optional)

Only when you want to use DC1 and DC2 on one MPP tracker, you need to connect the DC inputs as described on this page.

WARNING

High electrocution

When you remove the cover from the fuse section, protection degree is no longer IP65.

► Remove the cover only when it is

really necessary.

► Remove the cover only when the

inverter is in a dry environment.

► Close the cover tightly after work.

You need the two DC bus bars delivered with the inverter. The screws are already fastened to the connectors inside the fuse section.

You can download the manual from the Multi-Contact website. This manual will also tell you which tools are required.

France: Safety caps are needed for each DC input that is connected to a string of solar modules.

It is recommended to use a special open-end spanner for the MC4 DC connectors if you need to disconnect MC4 DC connectors from the inverter. Otherwise you might destroy the DC Connectors.

► You should use a magnetic screw

driver, so that the screws cannot accidentally fall into the inverter.

1. Loosen the six screws of the fuse section cover.

2. Remove the cover from fuse section.

Installation and Operation Manual for RPI M50A

6 Installation

3. Mount one DC bus bar to connect the DC1+ bar

and the DC2+ bar.

Mount the other DC bus bar with two DC bar

screws to connect the DC1– bar and the DC2–

bar.

DC1+

DC2+

DC1-

DC2-

5. Fasten the six screws to the fuse section cover.

4. Put the cover on the fuse section and screw it

tightly with all six screws.

To ensure protection degree IP65, take care that

– the cover is correctly positioned and seals the

fuse section,

– the rubber at the fuse cover is not damaged or

dirty.

Installation and Operation Manual for RPI M50A

6 Installation

+–

6.7 Connecting communication port I (optional)

COMM.

Fig. 6.24: Position of the communication port I on the

inverter

6.7.1 RS485 and VCC

RS485 is used to connect the inverters of the PV plant via a datalogger to a monitoring system.

VCC can be used for an external relais. To use VCC, set DIP switch 1 to ON. When you do not use VCC, always set DIP switch 1 to OFF.

For connecting RS485, Pins 3 to 6 are used.

If you want to use SOLIVIA Monitor, the Internet based monitoring from Delta, you will also need a SOLIVIA M1 G2 Gateway.

Default baud rate is 19200 which can be changed on the inverter (see chapter “8.5 Baud rate for RS485”,

p. 57).

Pin assignment

Fig. 6.25: Connectors on the communication card

Pin Designation

Dry contacts

3 DC connectors (DC inputs)

4 Communication port 1

VCC switch and RS485 termination resistor

1 2 3 4 5 6

Pin Designation

1 VCC (+12 V; 0.5 A) 2 GND 3 DATA+ (RS485) 4 DATA– (RS485) 5 DATA+ (RS485) 6 DATA– (RS485)

Data format

Baud rate 9600, 19200, 38400;

Standard: 19200 Data bits 8 Stop bit 1 Parity not applicable

Installation and Operation Manual for RPI M50A

6 Installation

Switch for VCC and termination resistor

Connecting a single inverter to a datalogger

VCC

Termination

resistor

Connecting multiple inverters to a datalogger

If your datalogger has no integrated termination resistor, switch on the termination resistor on the rst inverter in

the RS485 line.

Installation and Operation Manual for RPI M50A

Data logger

6 Installation

6.7.2 Dry contacts

When the fans fail, Dry contact 1 is closed. When the inverter feeds into the grid, Dry contact 2 is closed.

Dry contact 2Dry contact 1

6.7.3 Digital inputs and EPO

The digital inputs can be used to connect an external ripple control receiver for controlling the active power.

5 6 7 8

1 2 3 4

Pin Design. Short Assigned action

1 V1 - -

2 K0 V1 + K0

3 K1 V1 + K1

4 K2 V1 + K2

5 K3 V1 + K3

6 K4 V1 + K4

7 K5 V1 + K5 Reserved 8 K6 V1 + K6 Reserved

The relay for EPO can be set on the display to “normally open” or “normally closed”, see “8.9 EPO

(External Power Off)”, p. 67.

EPO (Emergency Power Off) Set maximum active power to 0% Set maximum active power to 30% Set maximum active power to 60% Set maximum active power to 100%

Installation and Operation Manual for RPI M50A

6 Installation

6.8 Wiring communication port 1

6.8.1 First steps for all cables

Because all communication cables are connected to the same communication port, you should do the complete wiring at once.

1. Unscrew and remove the bolting.

3. Pull all cables you want to connect through the

bolting.

2. Unscrew and remove the cover.

6.8.2 Wiring a single inverter for RS 485

Wiring RS 485 depends on whether you want to connect a single or multiple inverters.

1. Connect the two wires to Pin D- and Pin D+.

Installation and Operation Manual for RPI M50A

6 Installation

2. Switch on DIP switch 2 to turn on the termination

resistor.

6.8.3 Wiring multiple inverters for RS 485

Wiring RS 485 depends on whether you want to connect a single or multiple inverters.

1. On the  rst inverter in the RS485 chain, connect

the cable that comes from the datalogger to the

right Pin DC+ and Pin DC-.

3. On the second inverter, connect the cable that

comes from the  rst inverter and the cable that

goes to the next inverter. Repeat these steps for

all other inverters in the RS485 chain, except for

the last inverter.

4. On the last inverter in the RS485 chain, connect

the cable that comes from the datalogger to the

right Pin DC+ and Pin DC-.

2. Connect the cable that goes to the second in-

verter in the RS485 chain to the left Pin DC+ and

Pin DC-.

5. On the last inverter in the RS485 chain, switch on

DIP switch 2 to turn on the termination resistor.

Installation and Operation Manual for RPI M50A

6 Installation

6.8.4 Wiring the dry contacts

You can use both dry contacts or only one.

6.8.5 Wiring the digital inputs

You can use one of the digital inputs only. The im-

ages below are examples. The  rst image shows

the wiring for using the 60% power limitation

signal (Pin V1 and Pin K3).

6.8.6 Finishing the wiring

Depending on how many cables you connected and whether it is a single inverter or an inverter in a chain

of multiple inverters, the  nal wiring could look like

shown in the following two images.

The second image shows the wiring for using

EPO (Emergency Power Off, Pin V1 and Pin K0).

When you want to use multiple digital inputs, Pin

V1 is used for all of these digital inputs.

1. Screw the cover of the communication port onto

the inverter.

Installation and Operation Manual for RPI M50A

6 Installation

WARNING

Dual Supply

Do not work on this equipment until it is isolated from

both mains and on site generation supplies

Isolate on-site Generating Unit(s) at …………………………………………… …….

Isolate mains supply at………………………………………………………

Warning – Only persons authorised by the DNO may remove the main cut out fuse

2. Screw the bolting onto the cover.

6.9 Putting labels on the inverter

After  nishing the installation, you have to put all

necessary labels onto the inverter. Check local regulations about which labels are needed. See some samples below.

Warning

Two sources of voltage present

- distribution network

- photovoltaic panels

Isolate both sources before

carrying out any work

Installation and Operation Manual for RPI M50A

7. Commissioning

Français

Select language

CHINA 2013 CHINA MV

FRA-Is 50HZ

YES / NO

Are you sure to

E-actuelle: 0kWh

Etat: On Grid

10.Sep 2014 15:32

7. Commissioning

The inverter must be correctly installed, see “6. Installation”, p. 37.

For information on how the display is operated, see “4.3 Display, buttons, status LEDs”, p. 12.

OFF ON

To execute commissioning, the inverter needs to be powered either by AC (the grid) or DC (the solar modules).

After powering up the inverter for the ﬁ rst time, the Select language dialog

DISCONN AC/DC

➔

English Deutsch

CZECH ENGLAND

is shown.

1. Use the buttons and to select language English.

To conﬁ rm your selection, press the button

ENT

2. Use the buttons and to select your country or grid type.

To conﬁ rm your selection, press the button

ENT

set country: United Kingdom

Puissance: 0W

► Check chapter “8. Settings”, p. 53 whether you need to adjust addtional set-

tings.

3. If the selected country is correct, use the buttons and to

select the entry YES.

To conﬁ rm your selection, press the button

If you want to change your selection, press the button

→ The inverter starts a self-test which takes approximately 2 min-

utes. A countdown shows the remaining time on the display.

The basic setup is ﬁ nished. The standard menu is shown.

ENT

ESC

Installation and Operation Manual for RPI M50A

8 Settings

8. Settings

8.1 Overview

8.2 Current grid settings (inverter information) 54

8.3 Display language 55

8.4 Date and time 56

8.5 Baud rate for RS485 57

8.6 Inverter ID 58

8.7 Insulation mode and insulation resistance 59

8.8 Grid settings 61

8.9 EPO (External Power Off) 67

8.10 AC Connection type 68

8.11 Max. Power (Maximum feed-in power) 69

8.12 Power limitation 70

8.13 Power versus frequency 72

8.14 Constant cos phi 74

8.15 Cos phi (P) 76

8.16 Constant Q 78

8.17 Q (V) - Apparent power versus voltage 80

8.18 FRT (Fault Ride Through) 83

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info.

8.2 Current grid settings (inverter information)

Overview

With this function you can see the current settings of the solar inverter.

Accessing the menu

Main menu > Inverter info.

1. When the default information is displayed, press any button to open the

Meter Energy Log Event Log

main menu. Otherwise, repeatedly press the button

menu is displayed.

2. Use the buttons and to select Inverter info.

To con rm your selection, press the button

ENT

3. Use the buttons and to scroll through the list.

4. To leave the menu, press the button

ESC

until the main

ESC

Installation and Operation Manual for RPI M50A

8.3 Display language

E-Today: 0kWh

Status: On Grid

Inverter Info.

Active/Reactive Pwr FRT

Italiano

Overview

With this function you can set the language used in the display.

Accessing the menu

Main menu > General settings > Language

8 Settings

10.Sep 2014 15:32

Power: 0W

General Settings Install Settings

Language Date & Time Baud rate

English Deutsch Français

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select General Settings.

To con rm your selection, press the button

ENT

3. Use the buttons and to select Language.

To con rm your selection, press the button

ENT

4. Use the buttons and to select a language.

To con rm your selection, press the button

ENT

Con gurable Parameters

Parameter Description Value range

Language

The language used in the display. –

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Language

8.4 Date and time

Overview

With this function you can set date and time.

► For a precise calculation of the statistics in the inverter itself and in a monitoring system, date

and time have to be correct.

Accessing the menu

Main menu > General settings > Date & Time

1. When the default information is displayed, press any button to open the

Install Settings

Date & Time Baud rate

10.Sep 2014 14:55

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select General Settings.

To con rm your selection, press the button

ENT

3. Use the buttons and to select Date & time.

To con rm your selection, press the button

ENT

4. Use the buttons and to change the currently marked (under-

lined) value.

When  nished, press the button

→ The marking moves to the next value.

ENT

Con gurable Parameters

Parameter Description Value range

Date and time –

Installation and Operation Manual for RPI M50A

8.5 Baud rate for RS485

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Language

9600

Overview

With this function you can set the baud rate for the RS485 connection.

► If you connect multiple inverters via RS485, set the same baud rate on each inverter.

Accessing the menu

Main menu > General settings > Baud rate

1. When the default information is displayed, press any button to open the

8 Settings

Power: 0W

Install Settings

Date & Time Baud rate

19200 38400

Con gurable Parameters

main menu. Otherwise, repeatedly press the button

menu is displayed.

ESC

2. Use the buttons and to select General Settings.

To con rm your selection, press the button

ENT

3. Use the buttons and to select Baud rate.

To con rm your selection, press the button

ENT

4. Use the buttons and to select a baud rate.

To con rm your selection, press the button

ENT

until the main

Parameter Description Value range

Baud rate

Installation and Operation Manual for RPI M50A

Sets the baud rate for the RS485 connection.

9600 | 19200 | 38400

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info.

Active/Reactive Pwr FRT

Grid Settings

Inverter ID: 001

8.6 Inverter ID

Overview

With this function you can set an ID for the inverter. The inverter ID is used to identify the inverter in a RS485 connection. The inverter ID is also used in monitoring systems.

► Set a different inverter ID for each inverter in the PV plant. Otherwise, the inverters cannot be

correctly identi ed.

► On the last inverter in the RS485 connection, switch on the RS485 termination resistor. For a

description, see “6.7 Connecting communication port I (optional)”, p. 45.

Accessing the menu

Main menu > Install Settings > Inverter ID

1. When the default information is displayed, press any button to open the

General Settings Install Settings

Insulation Country

Setting ID: ID=001

main menu. Otherwise, repeatedly press the button

until the main

ESC

menu is displayed.

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Inverter ID. The currently set

inverter ID is displayed behind the menu entry.

To con rm your selection, press the button

ENT

5. Use the buttons and to set the inverter ID.

To con rm your setting, press the button

ENT

Con gurable Parameters

Parameter Description Value range

Setting ID

Sets the inverter ID that is needed to identify the inverter when a PV plant contains multiple inverters.

001 .. 254

Installation and Operation Manual for RPI M50A

8.7 Insulation mode and insulation resistance

E-Today: 0kWh

Status: On Grid

Inverter Info.

Active/Reactive Pwr FRT

Grid Settings

Inverter ID: 001

Resistance: 1200 kΩ

OFF

Resistance: 1100 kΩ

Mode: ON

150kΩ

Description

With this function you can set up the mode of insulation and the insulation resistance.

Accessing the menu

Main menu > Install Settings > Insulation

8 Settings

10.Sep 2014 15:32

Power: 0W

General Settings Install Settings

Insulation Country

Mode: ON

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Insulation.

To con rm your selection, press the button

ENT

5. Use the buttons and to select Mode. The currently set mode

ON Plus grounded Minus grounded

250kΩ 1100kΩ

Installation and Operation Manual for RPI M50A

of insulation is displayed behind the menu entry.

To con rm your selection, press the button

ENT

6. Use the buttons and to select a type of insulation.

To con rm your selection, press the button

ENT

7. Use the buttons and to select Resistance. The currently set

value for the insulation resistance is displayed behind the menu entry.

To con rm your selection, press the button

ENT

8. Use the buttons and to select a value for the insulation resis-

tance.

To con rm your selection, press the button

ENT

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

Congurable Parameters

Parameter Description Value range

Mode

Resistance

Mode of insulation ON

Plus grounded

Minus grounded

OFF

Default: ON

Insulation resistance 150 kΩ | 250 kΩ | 1100 kΩ

Default: 1100 kΩ

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Grid Settings

Inverter ID: 001

8.8 Grid settings

8.8.1 Overview

This function is factory-set according to the regulation of each country. The inverter is certi ed

with these settings. The settings should not be changed, unless it is really necessary. Please contact Delta Support when you want to change these settings.

This function is protected by a special password. To get the password, please call the Delta Sup-

port hotline in your country. You can  nd the telephone number on the last page of this document.

To adjust several parameters for the currently selected country/grid settings.

The grid settings section consists of the following subsections:

● Voltage protection (How does the inverter behave in case of overvoltages or undervoltages.)

● Frequency protection (How does the inverter behave in case of overfrequencies or underfrequencies.)

● Reconnection time (The delay time the inverter will wait before it reconnects to the grid after a fault.)

● P Ramp up (Feed-in behavior of the inverter when it reconnects to the grid after a fault.)

8.8.2 Voltage protection

Overview

With this function you can de ne how the inverter behaves in case of a grid overvoltage and a grid undervolt-

age.

Accessing the menu

Main menu > Install Settings > Grid settings > Voltage Protection

1. When the default information is displayed, press any button to open the

Power: 0W

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Install Settings.

Install Settings

To con rm your selection, press the button

ENT

3. Type in the password you received from Delta Support. Use the buttons

and to set each digit.

Insulation Country

Installation and Operation Manual for RPI M50A

To con rm a digit, press the button

ENT

4. Use the buttons and to select Grid settings.

To con rm your selection, press the button

ENT

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

Reconnect T: 600s P Ramp up: 6000%/m

Voltage Protection

High On: 259.0V High Off T: 0.3s Low Off: 104.0V

High Off: 276.0V

Freq. Protection

5. Use the buttons and to select Voltage protection.

To con rm your selection, press the button

ENT

6. If you need to change a parameter, use the buttons and to

select the parameter.

Con gurable Parameters

Parameter Description

High Off

High On

High Off T

Low Off

Low On

Low Off T

Voltage High Off

Voltage High On

Disconnection time for Voltage High Off

Voltage Low Off

Voltage Low On

Disconnection time for Voltage Low Off

7. Press the button

to start editing the parameter value.

ENT

8. Use the buttons and to change the parameter value.

To con rm your setting, press the button

cancel the action.

or press the button

ENT

ESC

9. Repeat steps 6 to 8 for the other parameters if you need to change

them.

Hi Off Slow

Hi On Slow

Hi Off Slow T

Lo Off Slow

Lo On Slow

Lo Off Slow T

Table 8.1.: Con gurable parameters for Grid settings > Voltage Protection

Voltage High Off Slow

Voltage High On Slow

Disconnection time for Voltage High Off Slow

Voltage Low Off Slow

Voltage Low On Slow

Disconnection time for Voltage Low Off Slow

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Grid Settings

Inverter ID: 001

Reconnect T: 600s P Ramp up: 6000%/m

Voltage Protection

High On: 50.05Hz High Off T: 0.1s Low Off: 47.50Hz

High Off: 51.50Hz

8.8.3 Frequency protection

Overview

With this function you can de ne how the inverter behaves in case of a grid overfrequency and a grid underfre-

quency.

Accessing the menu

Main menu > Install Settings > Grid settings > Freq. Protection

1. When the default information is displayed, press any button to open the

Power: 0W

Install Settings

Insulation Country

Freq. Protection

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. Type in the password you received from Delta Support. Use the buttons

and to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Grid settings.

To con rm your selection, press the button

ENT

5. Use the buttons and to select Freq. Protection.

To con rm your selection, press the button

ENT

Installation and Operation Manual for RPI M50A

6. Use the buttons and to select a parameter.

7. To start editing the parameter value, press the button

8. To change the parameter value, use the buttons and .

To con rm your setting, press the button

cancel the action.

or press the button

ENT

9. Repeat steps 6 to 8 for all parameters you want to change.

Do not change this setting without prior

consultation with Delta Solar Support.

ENT

ESC

8 Settings

Congurable Parameters

Parameter Description

High Off

High On

High Off T

Low Off

Low On

Low Off T

Hi Off Slow

Hi On Slow

Hi Off Slow T

Lo Off Slow

Lo On Slow

Lo Off Slow T

Table 8.2.: Congurable parameters for Grid settings > Frequency Protection

Frequency High Off

Frequency High On

Disconnection time for Frequency High Off

Frequency Low Off

Frequency Low On

Disconnection time for Frequency Low Off

Frequency High Off Slow

Frequency High On Slow

Disconnection time for Frequency High Off Slow

Frequency Low Off Slow

Frequency Low On Slow

Disconnection time for Frequency Low Off Slow

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Grid Settings

Inverter ID: 001

Reconnect T: 600s P Ramp up: 6000%/m

Voltage Protection

8.8.4 Reconnection time

Overview

With this function you can de ne a reconnection time in case the inverter has disconnected from the grid

because of a grid voltage or grid frequency failure (see “8.8.2 Voltage protection”, p. 61 and “8.8.3 Frequency

protection”, p. 63). When the failure disappears, the inverter will wait for the set reconnection time before it

reconnects to the grid.

Accessing the menu

Main menu > Install Settings > Grid settings > Reconnect T

1. When the default information is displayed, press any button to open the

Power: 0W

Install Settings

Insulation Country

Freq. Protection

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. Type in the password you received from Delta Support. Use the buttons

and to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Grid settings.

To con rm your selection, press the button

ENT

5. Use the buttons and to select Reconnect T.

This subsection consists of only one parameter which can be directly

Con gurable Parameters

Parameter Description

Reconnect T

Installation and Operation Manual for RPI M50A

edited.

6. To start editing the parameter value, press the button

7. To change the parameter value, use the buttons and .

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

Reconnection time

Do not change this setting without prior

consultation with Delta Solar Support.

ENT

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Grid Settings

Inverter ID: 001

Reconnect T: 600s P Ramp up: 6000%/m

Voltage Protection

8.8.5 P Ramp Up

Overview

With this function you can de ne a ramp for the active power in case the inverter has disconnected from the grid

because of a grid voltage or grid frequency failure (see “8.8.2 Voltage protection”, p. 61 and “8.8.3 Frequency

protection”, p. 63). When the failure disappears, the inverter will continuously increase the active power fed

into the grid according to the set ramp.

Accessing the menu

Main menu > Install Settings > Grid settings > P Ramp Up

1. When the default information is displayed, press any button to open the

Install Settings

Insulation Country

Freq. Protection

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. Type in the password you received from Delta Support. Use the buttons

and to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Grid settings.

To con rm your selection, press the button

ENT

5. Use the buttons and to select P Ramp Up.

This subsection consists of only one parameter which can be directly

Con gurable Parameters

Parameter Description

P Ramp up

edited.

6. To start editing the parameter value, press the button

7. To change the parameter value, use the buttons and .

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

ENT

8 Settings

E-Today: 0kWh

Status: On Grid

Inverter Info.

Active/Reactive Pwr FRT

Grid Settings

RCMU: ON EPO: Normal Close

8.9 EPO (External Power Off)

Overview

With this function you can set the type of contact for the EPO function (normally open or normally closed).

Accessing the menu

Main menu > Install Settings > EPO

10.Sep 2014 15:32

Power: 0W

General Settings Install Settings

DC Injection Dry Contact

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select EPO. The current setting is

displayed behind the menu entry.

5. To start editing the parameter value, press the button

ENT

Con gurable Parameters

Parameter Description Value range

EPO

Installation and Operation Manual for RPI M50A

6. To change the parameter value, use the buttons and .

To con rm your selection, press the button

To cancel the action, press the button

Sets the type of contact for the relais (normally closed or normally open).

ENT

ESC

Normal Open | Normal Close

Default setting: Normal Close

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info.

Active/Reactive Pwr FRT

AC Connection: 3P4W

EPO: Normal Close

Anti-islanding: ON Max. Power: 100% Return to Factory

8.10 AC Connection type

Overview

With this function you can set the type of AC connection you use to connect the inverter to the grid. The inverter can be connected to a 3-wire system (3P3W: L1, L2, L3, PE) or a 4-wire system (3P4W: L1, L2, L3, N, PE). The default setting is 3P4W.

Accessing the menu

Main menu > Install Settings > AC Connection

1. When the default information is displayed, press any button to open the

General Settings Install Settings

main menu. Otherwise, repeatedly press the button

until the main

ESC

menu is displayed.

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select AC Connection. The current

setting is displayed behind the menu entry.

5. To start editing the parameter value, press the button

ENT

6. To change the parameter value, use the buttons and .

Con gurable Parameters

Parameter Description Value range

AC Connection

To con rm your selection, press the button

To cancel the action, press the button

Sets the type of AC connection used to connect the inverter to the grid.

3P3W: 3-wire system (L1, L2, L3, PE)

3P4W: 4-wire system (L1, L2, L3, N, PE)

ENT

ESC

3P3W | 3P4W

Installation and Operation Manual for RPI M50A

8.11 Max. Power (Maximum feed-in power)

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

AC Connection: 3P4W

EPO: Normal Close

Anti-islanding: ON Max. Power: 50000VA Return to Factory

Overview

This function should be set only when requested by country regulations, authorities or your grid operator.

With this function you can limit the maximum active power to be fed into the grid.

Accessing the menu

Main menu > Install Settings > Max. Power

1. When the default information is displayed, press any button to open the

8 Settings

Power: 0W

Install Settings

main menu. Otherwise, repeatedly press the button

until the main

ESC

menu is displayed.

2. Use the buttons and to select Install Settings.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Max. Power. The current setting

is displayed behind the menu entry.

5. To start editing the parameter value, press the button

ENT

6. To change the parameter value, use the buttons and .

Con gurable Parameters

Parameter Description Value range

Max. Power

Installation and Operation Manual for RPI M50A

To con rm your selection, press the button

To cancel the action, press the button

Limits the maximum power to be fed into the grid.

ENT

ESC

0 .. 55000 VA

Default: according to the country regulations

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Reactive Power Ctrl

Active Power Ctrl

Power vs. Frequency

Power Limit

8.12 Power limitation

Overview

Values have been set based upon country standards. If you modify these values, you will lose

certi cation. Therefore you should set this function only when requested by country regulations,

authorities or your grid operator.

With this function you can limit the active power fed into the grid.

The power limitation set with this function relates to the value set for the Max. Power parameter in the installation settings. For a description of the Max. Power parameter, see “8.11 Max. Power (Maximum feed-in power)”,

p. 69.

Example

You have set the maximum power to 80%.

If you additionally set a power limitation of 70%, the total maximum active power is calculated as 50 kW x 80% x 70% = 28 kW.

Accessing the menu

Main menu > Active/Reactive Pwr > Active Power Ctrl > Power limit

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

2. Use the buttons and to select Active/Reactive Pwr.

Install Settings

To con rm your selection, press the button

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

4. Use the buttons and to select Active Power Ctrl.

To con rm your selection, press the button

ENT

until the main

ESC

ENT

P(V)

5. Use the buttons and to select Power Limit.

To con rm your selection, press the button

ENT

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

Set Point: 100%

Mode: ON

Set Point: 100%

Mode: ON

6. To change the mode, use the buttons and and press the but-

ton

ENT

To switch the function on, select ON and press the button

To switch the function off, select OFF and press the button

you switch the function off, you can ignore the following steps.

7. To set the value for the power limitation, use the buttons and

to select Set Point and press the button

ENT

8. Use the buttons and To change the parameter value.

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

Con gurable Parameters

Parameter Description Value range

ENT

. When

Mode

Set Point

Switches the function on and off.

The value for the power limitation.

ON | OFF

Default value: OFF

0 .. 100%

Default value: 100%

Installation and Operation Manual for RPI M50A

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Reactive Power Ctrl

Active Power Ctrl

8.13 Power versus frequency

Overview

Values have been set based upon country standards. If you modify these values, you will lose certi-

 cation. Therefore you should set this function only when requested by country regulations, authori-

ties or your grid operator.

With this function you can control the active power as a function of the grid frequency.

Default behaviour for Germany LV (VDE-AR-N

Default behavior for grid Germany MV (BDEW)

4105)

Gradient (%/Hz)

recovery

is automatically calculated according to the following formula:

stop

= F

+ (1 / Gradient)

start

= f

start

stop

f (Hz)

recovery

Accessing the menu

Main menu > Active/Reactive Pwr > Active Power Ctrl > Power vs. Frequency

1. When the default information is displayed, press any button to open the

Gradient (%/Hz)

start

stop

f (Hz)

Install Settings

main menu. Otherwise, repeatedly press the button

ESC

menu is displayed.

2. Use the buttons and to select Active/Reactive Pwr.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Active Power Ctrl. The current

setting is displayed behind the menu entry.

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

until the main

P(V)

Power vs. Frequency

Power Limit

F Recovery: 50.20Hz Gradient: 100%

F Start: 50.20Hz

Mode: ON

F Recovery: 50.20Hz Gradient: 100%

F Start: 50.20Hz

Mode: ON

8 Settings

5. Use the buttons and to select Power vs Frequency. The cur-

rent setting is displayed behind the menu entry.

6. To change the mode, use the buttons and and press the but-

Con gurable Parameters

Parameter Description

ton

To switch the function on, select ON and press the button

To switch the function off, select OFF and press the button

you switch the function off, you can ignore the following steps.

ENT

. When

ENT

7. Use the buttons and to select a parameter and press the but-

ton

ENT

8. To change the parameter value, use the buttons and .

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

9. Repeat steps 7 to 8 for all parameters you want to change.

Mode

F Start

F Recovery

Gradient

T Recovery When the grid frequency drops to F Recovery, the inverter will wait for the time

Switches the function on and off.

The grid frequency at which the inverter starts to limit the active power according to the Gradient parameter.

The grid frequency at which the inverter reconnects to the grid or at which the inverter feeds-in full power again. The behavior depends on the selected country and grid.

Adjustment of the active power fed into the grid in percent per Hz when the grid frequency is between F Start and F Stop.

de ned in T Recovery before it returns to normal operating behavior.

Installation and Operation Manual for RPI M50A

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Reactive Power Ctrl

Active Power Ctrl

Q(V)

Cos phi: Ind 1.00

Mode: ON

Cos phi: Ind 1.00

Mode: ON

8.14 Constant cos phi

Overview

With this function you can set a constant cos phi (cos φ).

This function should be set only when requested by country regulations, authorities or your grid operator.

Accessing the menu

Main menu > Active/Reactive Pwr > Reactive Power Ctrl > Constant cos phi

1. When the default information is displayed, press any button to open the

Install Settings

Constant cos phi Cos phi (P) Constant Q

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Active/Reactive Pwr.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Reactive Power Ctrl. The cur-

rent setting is displayed behind the menu entry.

5. Use the buttons and to select Constant cos phi. The current

setting is displayed behind the menu entry.

6. To change the mode, use the buttons and to select Mode and

press the button

To switch the function on, select ON and press the button

To switch the function off, select OFF and press the button

you switch the function off, you can ignore the following steps.

ENT

7. If you need to change the cos phi (cos φ), use the buttons and

to select Cos phi and press the button

ENT

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

ENT

. When

8 Settings

8. To change the parameter value, use the buttons and .

To conrm your setting, press the button

To cancel the action, press the button

Congurable Parameters

Parameter Description Value range

Mode

Cos phi

Switches the function on and off.

Sets up a cos phi so that the inverter can feed reactive power into the grid.

ENT

ESC

ON | OFF

Default value: OFF

ind 0.8 ... cap 0.8

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info.

Active/Reactive Pwr FRT

Reactive Power Ctrl

Q(V)

8.15 Cos phi (P)

Overview

Values have been set based upon country standards. If you modify these values, you will lose certi-

 cation. Therefore you should set this function only when requested by country regulations, authori-

ties or your grid operator.

With this function you can set the cos phi (cos φ) as a function of the active power.

cos φ

0.8

upper

1.0

lower

0.8 P

lower

Accessing the menu

Main menu > Active/Reactive Pwr > Active Power Ctrl > Cos phi (P)

upper

100%

P/P

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

General Settings

2. Use the buttons and to select Active/Reactive Pwr.

Install Settings

To con rm your selection, press the button

3. The menu is protected by password 5555. Use the buttons and

ENT

until the main

ESC

Active Power Ctrl

Constant cos phi Cos phi (P) Constant Q

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Reactive Power Ctrl. The cur-

rent setting is displayed behind the menu entry.

5. Use the buttons and to select Cos phi (P). The current setting

is displayed behind the menu entry.

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

Q lower: Ind 1.00

P lower: 45%

Q upper: Ind 1.00

Mode: ON

Q lower: Ind 1.00

P lower: 45%

Q upper: Ind 1.00

Mode: ON

6. To change the mode, use the buttons and to select Mode and

Con gurable Parameters

Parameter Description

press the button

To switch the function on, select ON and press the button

To switch the function off, select OFF and press the button

you switch the function off, you can ignore the following steps.

ENT

. When

ENT

7. If you need to change a parameter, use the buttons and to

select the parameter and press the button

ENT

8. To change the parameter value, use the buttons and .

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

9. Repeat steps 7 to 8 for other parameters if you need to change them.

Mode

Q upper

P upper

Q lower

P lower

V lock-in

V lock-out

Switches the function on and off.

Sets up the upper limit for the reactive power which is set as a cos phi (cos φ).

Sets up the upper limit for the active power which is set in per cent of the nominal power.

Sets up the lower limit for the reactive power which is set as a cos phi (cos φ).

Sets up the lower limit for the active power which is set in per cent of the nominal power.

The lower limit of the grid voltage range in which the function is active. The parameter is used for Italy only.

The upper limit of the grid voltage range in which the function is active. The parameter is used for Italy only.

Installation and Operation Manual for RPI M50A

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Reactive Power Ctrl

Active Power Ctrl

Q(V)

Constant cos phi

Fix Q: Ind 90%

Mode: ON

Fix Q: Ind 90%

Mode: ON

8.16 Constant Q

Overview

With this function you can set a constant reactive power.

This function should be set only when requested by country regulations, authorities or your grid operator.

Accessing the menu

Main menu > Active/Reactive Pwr > Active Power Ctrl > Constant Q

1. When the default information is displayed, press any button to open the

Install Settings

Cos phi (P) Constant Q

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Active/Reactive Pwr.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Reactive Power Ctrl. The cur-

rent setting is displayed behind the menu entry.

5. Use the buttons and to select Constant Q. The current setting

is displayed behind the menu entry.

6. To change the mode, use the buttons and to select Mode and

press the button

To switch the function on, select ON and press the button

To switch the function off, select OFF and press the button

you switch the function off, you can ignore the following steps.

ENT

7. If you need to change the parameter Fix Q, use the buttons and

to select the parameter and press the button

ENT

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

ENT

. When

8 Settings

8. To change the parameter value, use the buttons and .

Congurable Parameters

Parameter Description

Mode

Fix Q

Switches the function on and off.

Sets up a constant reactive power which is set in per cent of the nominal apparent power S

ESC

ENT

To conrm your setting, press the button

To cancel the action, press the button

9. Repeat steps 7 to 8 for other parameters if you need to change them.

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

8.17 Q (V) - Apparent power versus voltage

Overview

Values have been set based upon country standards. If you modify these values, you will lose certication. Therefore you should set this function only when requested by country regulations, authorities or your grid operator.

With this function you can set the apparent power as a function of the grid voltage.

This function is available for medium voltage grids only.

(1) Behavior for Curve A (2) Behavior for Curve B

63%

184.0 V

Q inductiveQ cpacitive

s limit

i limit

264.5 V230.0 V

63%

s limit

Q inductiveQ cpacitive

inductive cos φ

63%

184.0 V

i limit

264.5 V230.0 V

Operating behavior for curve A

When the grid voltage increases to the lower voltage limit V1s, the inverter starts to feed-in inductive reactive power. When you set the parameter T inductive, the inverter will wait for this period time for the grid voltage falling back to a level below V1s before it starts feeding in inductive reactive power. When the grid voltage con-

tinues to increase, the inductive reactive power will be increased according to the ramp dened by the curve. If

the grid voltage exceeds the upper voltage limit V2s, the inductive active power remains at the level dened in Qs limit.

When the grid voltage falls to the upper voltage limit V1i, the inverter starts to feed-in inductive reactive power. When you set the parameter T delay, the inverter will wait for this period time for the grid voltage rising back to a level above V1i before it starts feeding in inductive reactive power. When the grid voltage continues to fall,

the inductive reactive power will be increased according to the ramp dened by the curve. If the grid voltage

exceeds the upper voltage limit V2i, the inductive active power remains at the level dened in Qi limit.

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

Accessing the menu

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info. General Settings

Active/Reactive Pwr FRT

Reactive Power Ctrl

Active Power Ctrl

Q(V)

Qs limit: Ind 44%

V2s: 253.0V

V1s: 248.4V

Mode: OFF

Qs limit: Ind 44%

V2s: 253.0V

V1s: 248.4V

Mode: Curve A

Main menu > Active/Reactive Pwr > Active Power Ctrl > Q (V)

1. When the default information is displayed, press any button to open the

8 Settings

Power: 0W

Install Settings

Constant cos phi Cos phi (P) Constant Q

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Active/Reactive Pwr.

To con rm your selection, press the button

ENT

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

To con rm a digit, press the button

ENT

4. Use the buttons and to select Reactive Power Ctrl. The cur-

rent setting is displayed behind the menu entry.

5. Use the buttons and to select Q (V). The current setting is

displayed behind the menu entry.

6. To change the mode, use the buttons and to select Mode and

press the button

To switch the function on, select a mode and press the button

To switch the function off, select OFF and press the button

you switch the function off, you can ignore the following steps.

ENT

. When

ENT

7. If you need to change a parameter, use the buttons and to

select the parameter and press the button

ENT

8. To change the parameter value, use the buttons and .

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

9. Repeat steps 7 to 8 for other parameters if you need to change them.

Installation and Operation Manual for RPI M50A

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

Congurable Parameters

Parameter Description

Mode OFF Switches the function on and off.

Curve A

Curve B

V1s

V2s

Qs limit

V1i

V2i

Qi limit

T delay

P lock-in

P lock-out

The lower voltage limit for feeding-in capacitive reactive power.

The upper voltage limit for feeding-in capacitive reactive power.

The limit for the inductive apparent power. The value is set in per cent of the rated apparent power S

The upper voltage limit for feeding-in inductive reactive power.

The limit for the inductive apparent power. The value is set in per cent of the rated apparent power S

Internal parameter

The lower limit of the active power range within which the function is active. The parameter is given in percent of the nominal power. Used for Italy only.

The upper limit of the active power range within which the function is active. The parameter is given in percent of the nominal power. Used for Italy only.

. This value is with parameter V2s.

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

8 Settings

E-Today: 0kWh

Status: On Grid

10.Sep 2014 15:32

Inverter Info.

Active/Reactive Pwr FRT

8.18 FRT (Fault Ride Through)

Overview

Values have been set based upon country standards. If you modify these values, you will lose certi-

 cation. Therefore you should set this function only when requested by country regulations, authori-

ties or your grid operator.

With this function you can set the operation behavior of the inverter for FRT (Fault Ride Through).

Fig. 8.28: Operation behavior for FRT (Fault Ride Through)

t1 : The point in time when the fault occurs.

Accessing the menu

Main menu > FRT

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

Power: 0W

General Settings

menu is displayed.

2. Use the buttons and to select FRT.

Install Settings

To con rm your selection, press the button

3. The menu is protected by password 5555. Use the buttons and

to set each digit.

ENT

until the main

ESC

Installation and Operation Manual for RPI M50A

To con rm a digit, press the button

ENT

Do not change this setting without prior

consultation with Delta Solar Support.

8 Settings

t1: 0.30s

Vdrop: 0%

Dead band: -10%

Mode: ON

t1: 0.30s

Vdrop: 0%

Dead band: -10%

Mode: ON

4. To change the mode, use the buttons and to select Mode and

Con gurable Parameters

press the button

To switch the function on, select Mode = ON and press the button

To switch the function off, select select Mode = OFF and press the but-

ton

steps.

. When you switch the function off, you can ignore the following

ENT

5. If you need to change a parameter, use the buttons and to

select the parameter and press the button

ENT

6. To change the parameter value, use the buttons and .

ESC

ENT

To con rm your setting, press the button

To cancel the action, press the button

7. Repeat steps 5 to 6 for all parameters you need to change.

ENT

Parameter Description

Mode

Dead band

Vdrop

K factor

Switches the function on and off.

Dead band

Drop voltage

Time t1

Voltage U1

Time t3

K factor

Do not change this setting without prior

consultation with Delta Solar Support.

Installation and Operation Manual for RPI M50A

9 Measurements and statistics

E-Today: 0kWh

Status: On Grid

Inverter Info.

Meter

P 0 0 0 W

I 0 0 0 A

V 0 0 0 V

AC L1 L2 L3

E-Today: 0 kWh

Frequency: 0 Hz

P 0 0 W

I 0 0 A

V 0 0 V

DC DC1 DC2

9. Measurements and statistics

The inverter provides several measurements and statistics about the operating behavior and events that can

have an inﬂ uence on the operating behavior.

The following types of measurements and statistics are available:

Type of information Description

Meter Current data of many parameters.

Energy log Energy information for total lifetime.

Event log A list of important events like failures, parameter changes etc. with date and time.

Inverter information Basic information like general settings, software versions etc.

9.1 Meter

Description

In this menu you ﬁ nd the current data of several parameters in real time. The meter statistics consist of three pages. The information can only be read and not edited.

Accessing the Menu

Main menu > Meter

10.Sep 2014 15:32

Power: 0W

Energy Log Event Log

Power: 0 W

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Meter.

To conﬁ rm your selection, press the button

ENT

3. Use the buttons and to scroll through the meter statistics.

Installation and Operation Manual for RPI M50A

4. To close the meter statistics, press the button

ESC

9 Measurements and statistics

Displayed Parameters

Parameter Description

Page 1 AC side

For the AC side in total is displayed:

Power

Frequency

E-Today

Currently produced active power, in W.

Current grid frequency, in Hz.

Total energy produced on this day, in kWh.

Page 2 AC side

For each phase (L1, L2, L3) is displayed:

Voltage, in V

Current, in A

Active Power, in W

Page 3 DC side

For each DC input is displayed:

Voltage, in V

Current, in A

Power, in W

Installation and Operation Manual for RPI M50A

9 Measurements and statistics

E-Today: 0kWh

Status: On Grid

Inverter Info.

Meter

Life energy: 0kWh

Energy log

9.2 Energy log

Description

In these statistics you ﬁ nd several values for the total lifetime of the solar inverter.

Accessing the Menu

Main menu > Energy log

10.Sep 2014 15:32

Power: 0W

Energy Log Event Log

Runtime: 0h

Displayed Parameters

Parameter Description

Life energy

Total amount of energy produced by the solar inverter, in kWh.

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Energy log.

ESC

ENT

To conﬁ rm your selection, press the button

3. To close the energy log, press the button

Runtime

Installation and Operation Manual for RPI M50A

The total time that the inverter was in operation.

9 Measurements and statistics

E-Today: 0kWh

Power: 0W

Status: On Grid

10.Sep 2014 15:32

Inverter Info.

Meter

9.3 Event log

Description

The event log is a list of important events that happened during operation.

Accessing the Menu

Main menu > Event log

1. When the default information is displayed, press any button to open the

Energy Log Event Log

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Event log.

To conﬁ rm your selection, press the button

ENT

3. Use the buttons and to scroll through the event log.

Installation and Operation Manual for RPI M50A

9.4 Inverter information

E-Today: 0kWh

Status: On Grid

Inverter Info.

Meter

Inverter Info.

Meter

Description

In this section you ﬁ nd general information about the inverter.

Accessing the Menu

Main menu > Event log

9 Measurements and statistics

10.Sep 2014 15:32

Power: 0W

Energy Log Event Log

Displayed Parameters

Parameter Description

S/N

DSP, Red, Comm, Wiﬁ

Serial number.

The software versions of the various controllers.

1. When the default information is displayed, press any button to open the

main menu. Otherwise, repeatedly press the button

menu is displayed.

until the main

ESC

2. Use the buttons and to select Inverter Info.

To conﬁ rm your selection, press the button

ENT

3. Use the buttons and to scroll through the inverter information.

Country

Insulation

Baud rate

Install

AC connection

Pmax

Installation and Operation Manual for RPI M50A

The currently set inverter ID for RS485. For a description how to change the inverter

ID, see “8.6 Inverter ID”, p. 58.

The currently set country/grid.

The currently set insulation resistance in kΩ. For a description how to change the

insulation settings, see “8.7 Insulation mode and insulation resistance”, p. 59.

The currently set baud rate for RS485. For a description how to change the baud rate,

see “8.5 Baud rate for RS485”, p. 57.

The date of installation.

The currently chosen type of AC connection. For a description how to set a different

type of AC connection, see “8.11 AC Connection type”, p. 68.

The currently set maximum active power that the inverter feeds into the grid. For a

description how to change the maximum active power, see “8.12 Max. Power (Maxi-

mum feed-in power)”, p. 69.

10. Error messages and trouble shooting

10.1 Errors

Message Possible cause Solution

AC Freq Low ● Actual utility frequency is under the

UFR (under frequency recognition) setting.

● Incorrect country or grid setting. ● Check country and grid setting.

● Detection circuit malfunction. ● Check the detection circuit inside

AC Freq High ● Actual utility frequency is over the

OFR (over frequency recognition) setting.

● Incorrect country setting. ● Check country setting.

● Detection circuit malfunction. ● Check the detection circuit inside

AC Volt High ● Actual utility voltage is over the OVR

(over voltage recognition) setting.

● Utility voltage is over the Slow OVR

setting during operation.

● Incorrect country or grid setting. ● Check country and grid setting.

● Detection circuit malfunction. ● Check the detection circuit inside

● Check the utility frequency on solar

inverter terminal.

solar inverter.

● Check the utility frequency on solar

inverter terminal.

solar inverter.

● Check the utility voltage on solar

inverter terminal.

● Check the utility voltage on solar

inverter terminal.

solar inverter.

AC Volt Low ● Actual utility voltage is under the UVR

(under voltage recognition) setting.

● Incorrect country or grid setting. ● Check country and grid setting.

● Wrong connections in AC plug. ● Check the connection in AC plug.

● Detection circuit malfunction. ● Check the detection circuit inside

Grid Quality ● Non-linear load in grid and near to

inverter.

HW Connect Fail ● Wrong connection in AC plug. ● Check the AC connection.

● Detection circuit malfunction. ● Check the detection circuit inside

Insulation ● PV array insulation fault. ● Check the insulation of Solar inputs.

● Large PV array capacitance between

Plus to Ground or Minus to Ground or both.

● Detection circuit malfunction. ● Check the detection circuit inside

● Check the utility voltage connection to

solar inverter terminal.

solar inverter.

● Grid connection of inverter needs to

be far away from non-linear load if necessary.

solar inverter.

● Check the capacitance, dry PV panel

if necessary.

solar inverter.

No Grid ● AC breaker is OFF. ● Switch on AC breaker.

● Disconnect in AC plug. ● Check the connection in AC plug and

make sure it connects to inverter.

Installation and Operation Manual for RPI M50A

10. Error messages and trouble shooting

Message Possible cause Solution

Solar1 High ● Actual Solar1 voltage is over

1000 V

● Detection circuit malfunction. ● Check the detection circuit inside

Solar2 High ● Actual Solar2 voltage is over

1000 V

● Detection circuit malfunction. ● Check the detection circuit inside

● Modify the solar array setting, and

make the Voc less than 1000 VDC.

solar inverter.

● Modify the solar array setting, and

make VDC less than 1000 VDC.

solar inverter.

10.2 Warnings

Message Possible cause Solution

Solar1 Low ● Actual Solar1 voltage is under the

limit.

● Some devices were damaged inside

solar inverter if the actual Solar1 voltage is close to “0”.

● Detection circuit malfunction. ● Check the detection circuit inside

● Check the Solar1 voltage connection

to solar inverter terminal.

● Check all switching devices in boost1.

solar inverter.

Solar2 Low ● Actual Solar2 voltage is under the

limit.

● Some devices were damaged inside

solar inverter if the actual Solar2 voltage is close to “0”.

● Detection circuit malfunction. ● Check the detection circuit inside

● Check the Solar2 voltage connection

to solar inverter terminal.

● Check all switching devices in boost2.

solar inverter.

10.3 Faults

Message Possible cause Solution

AC Current High ● Surge occurs during operation. ● Call Delta Support.

● Driver for inverter stage is defective. ● Check the driver circuit in inverter

stage.

● Switching device is defective. ● Check all switching devices in inverter

stage.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

Bus Unbalance ● Not totally independent or parallel

between inputs.

● Check the inputs connections.

Installation and Operation Manual for RPI M50A

● PV array short to ground. ● Check the PV array insulation.

● Driver for boost is defective or discon-

nected.

● Detection circuit malfunction. ● Check the detection circuit inside

● Check the driver circuit for boost

inside solar inverter.

solar inverter.

10. Error messages and trouble shooting

Message Possible cause Solution

DC Current High ● Switching device in boost is defective. ● Check all switching device in boost.

● Driver for boost is defective. ● Check the driver curcuit for boost

inside the solar inverter.

● Input current detection circuit mal-

● Check input current detection circuit.

function.

Ground Current ● PV array insulation fault. ● Check the insulation of DC inputs.

● Large PV array capacitance between

Plus to Ground or Minus to Ground.

● Check the capacitance (+ <-> GND

& - <->GND), must < 2.5 µF. Install a external transformer if necessary.

● Either side of boost driver or boost

● Check boost driver & boost choke.

choke malfunction.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

HW AC OCR ● Large grid harmonics. ● Check the utility waveform. Grid con-

nection of inverter needs to be far away from non-linear load if necessary.

● Switching device is defective. ● Check all switching devices in inverter

stage.

● Detection circuit malfunction. ● Check the detection circuit inside the

solar inverter.

HW Bus OVR ● Driver for boost is defective. ● Check the driver circuit for boost

inside solar inverter.

● Voc of PV array is > 1000 V

. ● Modify the solar array setting, and

make VDC less than 1000 VDC.

● Surge occurs during operation. ● Call Delta Support.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

HW COMM1 ● DSP is idling. ● Check reset and crystal in DSP.

● The communication connection is

disconnected.

● The communication circuit malfunc-

● Check the connection between DSP

and COMM.

● Check the communication circuit.

tion.

HW COMM2 ● Red. CPU is idling. ● Check reset and crystal in Red. CPU.

● The communication connection is

disconnected.

HW Connect Fail ● Power line is disconnected inside

solar inverter.

● Check the connection between Red.

CPU and DSP.

● Check the power lines inside solar

inverter.

● Current feedback circuit is defective. ● Check the current feedback circuit

inside solar inverter.

Installation and Operation Manual for RPI M50A

10. Error messages and trouble shooting

Message Possible cause Solution

HW CT A Fail ● Test current loop is broken. ● Check the connection of CNP4 to

CNM4.

● CTP3 is defective. ● Replay CTP3 with new one.

● Detection circuit malfunction. ● Check the detection circuit inside the

solar inverter.

HW CT B Fail ● Test current loop is broken. ● Check the connection of CNP4 to

CNM4.

● CTP4 is defective. ● Replace CTP4 with new one.

● Detection circuit malfunction. ● Check the detection circuit inside the

solar inverter.

HW CT C Fail ● Test current loop is broken. ● Check the connection of CNP4 to

CNM4.

● CTP5 is defective. ● Replace CTP5 with new one.

● Detection circuit malfunction. ● Check the detection circuit inside the

solar inverter.

HW DC Injection ● Utility waveform is abnormal. ● Check the utility waveform. Grid con-

nection of inverter needs to be far away from non-linear load if necessary.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

HW DSP ADC1 HW DSP ADC2 HW DSP ADC3

● Insufcient input power. ● Check the input voltage, must >

150 V

● Auxiliary power circuitry malfunction. ● Check the auxiliary circuitry inside the

solar inverter.

● Detection circuit malfunction. ● Check the detection circuit inside the

solar inverter.

Installation and Operation Manual for RPI M50A

10. Error messages and trouble shooting

Message Possible cause Solution

HW Efciency ● The calibration is incorrect. ● Check the accuracy of current and

power.

● Current feedback circuit is defective. ● Check the current feedback circuit

inside solar inverter.

HW NTC1 Fail HW NTC2 Fail HW NTC3 Fail HW NTC4 Fail

HW Red ADC1 HW Red ADC2

● Ambient temperature > 90 °C or < -30

°C.

● Check the installation ambient and

environment.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

● Insufcient input power. ● Check the input voltage, must >

150 V

● Auxiliary power circuitry malfunction. ● Check the auxiliary circuitry inside the

solar inverter.

● Detection circuit malfunction. ● Check the detection circuit inside the

solar inverter.

HW ZC Fail ● The detection circuit for synchronal

signal malfunction.

● Check the detection circuit for syn-

chronal signal inside the solar inverter.

RCMU Fail ● RCMU is disconnected. ● Check the RCMU connection inside

solar inverter.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

Relay Test Open ● One or more relays are abnormal. ● Replace the defective relay(s).

● The driver circuit for the relay mal-

function.

● Check the driver circuit inside solar

inverter.

● The detection accuracy is not correct

for V

grid

and V

out

● Check the V

tection accuracy.

grid

and V

voltage de-

out

Relay Test Short ● One or more relays are sticking. ● Replace the defective relay(s).

● The driver circuit for the relay mal-

function.

Temperature High ● The ambient is > 60 °C (the installa-

tion is abnormal).

● Check the driver circuit inside solar

inverter.

● Check the installation ambient and

environment.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

Temperature Low ● Ambient temperature is < -30 °C. ● Check the installation ambient and

environment.

● Detection circuit malfunction. ● Check the detection circuit inside

solar inverter.

Installation and Operation Manual for RPI M50A

11. Maintenance

DANGER

Risk of death by electrocution

Potentially fatal voltage is applied to the solar inverter during operation. This potentially fatal voltage is still present for 10 seconds after all power sources have been disconnected.

► Never open the solar inverter. ► Always disconnect the solar inverter

from power before installation, open the AC/DC isolating switch and make sure neither can be accidentally reconnected.

► Wait at least 10 seconds until the

capacitors have discharged.

WARNING

High electrocution

When you remove the cover from the fuse section, protection degree is no longer IP65.

► Remove the cover only when it is

really necessary.

► Do not remove the cover when it is

raining and the inverter is wet.

► Close the cover tightly after work.

11 Maintenance

In order to ensure the normal operation of the solar inverter, please check it regularly at least once every 6 months. Check that all the terminals, screws, cables are securely in place. If there are any damaged parts,

please contact a qualied technician to repair it or

to replace it with a new spare part. To ensure that no foreign contaminants enter the warm air outlets, please have them cleaned every 6 months by quali-

ed technicians.

11.1 Regular maintenance

Every 6 months the following checkings should be done.

● Check string fuses. Measure the current by using

a current transducer.

● Check fans.

● Check air lters.

Installation and Operation Manual for RPI M50A

11 Maintenance

11.2 Replacing the fans

1. Loosen the 4 screws of the fan section.

2. Pull out the fan section.

4. Plug the  ve connectors with the wires into the

fan section. The order of the connectors does not

matter.

5. Put the new fan section into the inverter housing.

3. Pull out the  ve connectors with the wires.

6. Fasten the 4 screws of the fan section.

Installation and Operation Manual for RPI M50A

11 Maintenance

11.3 Cleaning the fans

CAUTION

Crushing hazard

The fans contain moving parts, on

which you can hurt your  ngers.

► Never use your  ngers to remove

debris from the fans.

► Never use sharp tools as these can

damage the fans.

► Use an air blower that blows dry air

to clean the fans.

1. Loosen the 4 screws of the fan section.

4. Plug the  ve connectors with the wires into the

fan section. The order of the connectors does not

matter.

5. Put the fan section into the inverter housing.

2. Pull out the fan section.

3. Pull out the  ve connectors with the wires.

6. Fasten the 4 screws of the fan section.

Installation and Operation Manual for RPI M50A

11 Maintenance

11.4 Cleaning the air ﬁ lters

The screws of the  lter section are very small

and can easily fall down. You should use a magnetic screw driver.

The inverter has two air  lters, one on the upper left

side and one on the upper right side.

1. Remove the 4 screws from each  lter section.

2. Pull out the air  lter section.

5. Fasten each air  lter section with the four screws.

3. Clean the air  lter with an air blower or a cloth.

4. Put the air  lter section into the inverter housing.

Installation and Operation Manual for RPI M50A

11.5 Replacing surge protection devices (SPD) on the DC side

Use only the SPDs mentioned in the table below for replacement. Delta reserves the right to deny warranty if another SPD type was used and this caused trouble on the inverter or the installation.

Type

Manufacturer GEHE

Part number GPU1-ZS1000*

Voltage U

Current I

Voltage U

max

1. Loosen the six screws of the fuse section cover.

1120 V

20 kA (8/20)

40 kA (8/20)

≤ 3.9 kV

11 Maintenance

2. Remove the cover from fuse section.

4. Pull out the defective SPD.

3. Look for the SPDs that have tripped and need to

be replaced.

On a defective SPD (DC) the green  eld is no

longer visible.

Installation and Operation Manual for RPI M50A

11 Maintenance

5. Plug in the new SPD.

6. Put the fuse section cover tightly on the inverter

housing. Take care that the cover is correctly

positioned and seals the fuse section to ensure

protection degree IP65.

7. Fasten the six screws to the fuse section cover.

11.6 Replacing surge protection devices (SPD) on the AC side

Use only the SPDs mentioned in the table below for replacement. Delta reserves the right to deny warranty if another SPD type was used and this caused trouble on the inverter or the installation.

Type

Manufacturer GEHE

Part number GPU1-C40/690

Voltage U

Current I

Voltage U

max

1. Loosen the six screws of the fuse section cover.

690 V

15 kA (8/20)

30 kA (8/20)

≤ 2.5 kV

2. Remove the cover from fuse section.

3. Look for the SPDs that have tripped and need to

be replaced.

On a defective SPD (AC) the red pin has jumped

out.

100

Installation and Operation Manual for RPI M50A

Delta Electronics RPI M50A_120, RPI M50A_122 Installation And Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. About this manual

1.1 Purpose of this manual

1.3 Warnings and symbols

1.2 Target audience of this manual

1.4 Conventions used in this manual

2. General safety instructions

3. Intended use

4. Product overview

4.1 Scope of delivery

4.2 Components and connectors

4.3 Display, buttons, status LEDs

4.4 String fuses

4.5 Surge protection devices

4.5.1 AC side

4.6 Air inlets and fans

4.5.2 AC side

4.7 Electrical connectors

4.7.1 Overview

4.7.2 AC/DC disconnection switch

4.7.4 DC connectors (DC inputs)

4.7.5 Communication port 1

4.7.3 AC connector (AC output)

4.7.6 Communication port 2

4.7.7 Grounding connection

4.8 Information on the type label

5. Planning the installation

5.1 Where to mount the solar inverter

5.2 Outdoor installations

5.4 Temperature derating curves

5.6 Dimensions

5.7 AC connection

5.8 DC connection

5.8.1 Symmetrical and asymmetrical power input

5.8.2 Use with solar modules that do not need to be grounded.

5.8.3 Use with solar modules that have to be grounded.

5.8.4 Using DC1 and DC2 with only one MPP tracker

5.9 Connecting to a datalogger via RS485

5.10 Circuit diagram of string fuses and SPDs

5.11 What you need

6. Installation

6.1 Safety instructions

6.2 Mounting the inverter

6.3 Grounding the inverter housing

6.4 Connecting to the grid (AC)

6.5 Connecting to the solar modules (DC)

6.5.1 Safety instructions

6.6 Using DC1 and DC2 with only one MPP tracker (optional)

6.7 Connecting communication port I (optional)

6.7.1 RS485 and VCC

6.7.2 Dry contacts

6.7.3 Digital inputs and EPO

6.8 Wiring communication port 1

6.8.1 First steps for all cables

6.8.2 Wiring a single inverter for RS 485

6.8.3 Wiring multiple inverters for RS 485

6.8.4 Wiring the dry contacts

6.8.5 Wiring the digital inputs

6.8.6 Finishing the wiring

6.9 Putting labels on the inverter

7. Commissioning

8. Settings

8.1 Overview

8.2 Current grid settings (inverter information)

8.3 Display language

8.4 Date and time

Date and time –

8.5 Baud rate for RS485

8.6 Inverter ID

8.7 Insulation mode and insulation resistance

Grid Settings

8.8 Grid settings

8.8.1 Overview

8.8.2 Voltage protection

8.8.3 Frequency protection

8.8.4 Reconnection time

8.8.5 P Ramp Up