Eaton Electrical ETN1000, ETN2000 User Manual

EATON ETN1000 / ETN2000

Grid PV-Inverter

Installation and Operation Manual

Version 1.6 E 2010.06

Before you start…....................................................................................................3

Safety instructions...................................................................................................4

Limited W arranty.....................................................................................................6

1. Overview.........................................................................................................7

2. Features..........................................................................................................8

3. Installation instructions.................................................................................9

Opening the package...............................................................................9

Before installation.....................................................................................9

Mounting Inverter to the wall.................................................................. 11

Connecting to the grid (AC utility)...........................................................14

Connect to PV Panel (DC input).............................................................15

Checking.................................................................................................16

4. System Diagram...........................................................................................17

5. Operating Your PV-Inverter.........................................................................18

Modes of operation.................................................................................18

Front Panel arrangement .......................................................................19

LED.........................................................................................................19

Function Key...........................................................................................19

Accuracy of the reading..........................................................................19

1

Front Panel.............................................................................................20

LCD Display Sequence:.........................................................................22

Maximum Power Point Tracking (MPPT)...............................................22

Maximum Power Point Tracking (MPPT)...............................................23

6. Inverter Status ..................................................................................................24

Display information.................................................................................24

7. Communications..............................................................................................27

8. Trouble shooting..............................................................................................29

9. Specifications...................................................................................................31

Electrical.................................................................................................31

Edition 1.6E, 2010/06 2

Before you start…

Congratulations on choosing EATON ETN1000 / ETN2000 Grid PV-Inverter,
a product from EA T ON Grid PV -Inverter is a highly reliable prod uct due to it s
innovative design and perfect quality control. Such an inverter is used in
high demand, grid-linked PV systems.

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If you encounter any problems during installation or operation of this unit, first
check this manual before contacting your local dealer or representative.
Instructions inside this manual will help you solve most installation and
operation difficulties.

Thank you again for choosing our product. Please keep this manual handy
for quick reference.

3

Safety instructions

z Risk of Electric Shock

1. Do not remove the casing. Inverter contains no user serviceable pa rts.
Refer servicing to qualified service personnel.

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2. When a photovoltaic panel is exposed to l ight, it generates a DC voltage.

3. Energy stored in this equipment’s DC link capacitors presents a risk of

4. This unit is designed to feed power to the public power grid (utility) only.

5. Carefully remove the unit from it s packaging and inspect for external

ddiissccoonnnneecctt tthheessee cciirrc

When connected to this equipment, a photovoltaic panel will charge
the DC link capacitors.

electric shock. Even after the unit is disconnected from the grid and
photovoltaic panels, high voltages may still exist inside t he PV -Inverter.
Do not remove the casing until at least 30 minutes after disconnecting
all power sources.

Do not connect this unit to an AC source or generator. Connecting
Inverter to external devices could result in serious damage to your
equipment.

damage. If you find any imperfections, please contact your local

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dealer.

Edition 1.6E, 2010/06 4

z Hot surfaces

Although designed to meet all safety requirements, some
parts and surfaces of Inverter are still hot during operation.
To reduce the risk of injury, do not touch the he at sink at the ba ck of the
PV-Inverter or nearby surfaces while Inverter is operating.

5

Limited Warranty

Inverter comes with a limited warranty. This warranty includes all defects of
design, components and manufacturing. Excluded from warranty are
damages due to:

z Breaking the product seal (opening the casing)
z Improper transportation and delivery
z Unqualified persons opening the unit
z Improper installation
z Unauthorized modification, testing or repairing
z Use and application beyond the definition in this manual
z Application beyond the scope of safety standards
z Acts of nature such as lighting, fire, storm etc.

The right to repair and/or replace the unit is at the manufacturers’ discretion.
Any damages discovered during installation should be submitted via a
written damage report within 5 working days of receiving the PV-Inverter.
Otherwise EATON is not responsible for damages beyond the scope of this
warranty.

Edition 1.6E, 2010/06 6

1. Overview

1.0 kW / 2.0kW Design Overview

Front View Bottom View

Parts Description

Display information switch

Operation LED,
Green , normal

Operation LED,
Red, fault status

Solar panel input

7

RS232 cover

LCD Display: Showing
the inverter status

Utility (AC) connection:
Terminal Black

Optional communications
slot: RS232 & others

2. Features

z Very high conversion efficiency (up to 96%)

z MPPT (Maximum Power Point Tracking)

z Higher power capacity than similar products of the same si ze.

z Embedded LCD display showing complete status information

z Natural convection cooling. Quiet, fan-less design

z Stylish, modern casing

z Compact, small profile

z High reliability, and Easy to install

z Maintenance free

z Standard RS-232, optional RS-485 and others

z No external GFCI breaker is required

Edition 1.6E, 2010/06 8

3. Installation instructions

Opening the package

After opening the package, please check the contents of the box. It
should contain the following:

1. One Inverter

2. One Instruction manual

3. One mounting frame

4. 4 mounting screws

5. 2 safety-lock screws

6. One cable gland and TB cover for AC cable

Before installation

Before starting installation please consider the follo wing items:

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9 Check the ambient temperature of installation is within specified

range -20 ~ +55°C.

9 The AC grid voltage is between 206 and 264VAC, 50/60Hz.
9 Electric utility company has approved the grid connection.
9 Qualified personnel are performing the installation.
9 Adequate convection space surrounds the inverter.
9 Inverter is being installed away from explosive vapors.
9 No flammable items are near the inverter.

9

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Edition 1.6E, 2010/06 10

Mounting Inverter to the wall

1. Select a wall or solid vertical surface that can support the PV-Inverter.

2. Inverter requires adequate cooling space. Allow at least 20cm space

above and below the inverter.

3. Using the mounting frame as a template, drill 4 holes as illustrated in the

following figures.

4. Fix the mounting frame as the

figure shows.

11

5. Hang the inverter on the mounting frame

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6. Check the installation conditions

a) Do not install the PV-Inverter on a slanted surface

.

Edition 1.6E, 2010/06 12

b) Check the upper straps of PV-Inverter and ensure it fits on to the

bracket

c) Insert safety-lock screws to the bottom leg to secure the inverter

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13

t

.

Connecting to the grid (AC utility)

1. Measure grid (utility) voltage and frequency. It should be 230VAC (or

220VAC), 50/60Hz, and single phase.

2. Open the breaker or fuse between PV-Inverter and utility.

3. For Inverter, connect AC wires as

follows:

z Insert utility wires through cable gland.

Connect wires according to polarities
indicated on terminal block. L → LINE
(brown), N → Neutral (blue) and →
system ground (green).

z Fasten the gland plate in order to make sure cable is firmly fixed.

Edition 1.6E, 2010/06 14

z Twist the gland, attached screws in order to seal the AC gland cover.

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4. Suggested cable width for AC wire.

Model

EATON ETN1000
EATON ETN2000

Diameter φ

(mm)

Area (mm2) AWG no.

≥1.02 ≥1.25 ≤16

Connect to PV Panel (DC input)

1. Make sure the maximum open circuit voltage (V

less than 500V
than 360V

UNDER ANY CONDITION. We recommend Voc less

DC

with ambient temperature of 25°C.

DC

) of each PV string is

oc

2. Use MC (Multi-contact

®

) connectors for PV array terminals.

3. Connect the positive and negative terminals from the PV panel to

positive (+) terminals and negative (-) terminals on the PV-Inverter.
Each DC terminal on Inverter can withstand up to 5A

15

in 1.0kW and

DC

10ADC in 2.0kW.

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Checking

1. When the PV p anels are connected and their output voltage is greater

than 100 V

but the AC grid is not yet connected, the message on the

DC

LCD display produce the following messages in order: “MODEL” ->
“Waiting” -> “No Utility”. The display repeats “No Utility” and the RED
“fault LED” turns on.

2. Close the AC breaker or fuse between PV-Inverter and grid. The

normal operating sequence begins.

3. Under normal operating conditions the LCD displays “Pac=xxxx.xW”.

That is the power fed to the grid. The green LED turns lights-up.

4. This completes the check.

Edition 1.6E, 2010/06 16

4. System Diagram

The typical connection diagram for the entire PV system is shown in the
following figure.

Utility

+ -

PV panel

1. PV Panel: Provide DC power to

inverter.

Connection

system

2. EATON ETN1000 / ETN2000 PV Inverter converts DC (Direct Current)

power from PV panel(s) to AC (Alternating Current) power. Because
Inverter is grid-connected it controls the current amplit ude accordin g to
the PV Panel power supply. Inverter always tries to convert the
maximum power from your PV panel(s).

3. Connection sy stem: This “interface” between Utility and PV-Inverter

may consist of electrical breaker, fuse and connecting terminals. To
comply with local safety standards and codes, the conne ction system
should be designed and implemented by a qualified technician.

4. Utility: Referred to as “grid” in this manual, is the way your electric

power company provides power to your place. Please note that
Inverter can only connect to low-voltage systems (namely, 220,
230VAC, 50/60Hz).

17

5. Operating Your PV-Inverter

Modes of operation

There are 3 different modes of operation.

1. Normal mode: In this mode, Inverter works normally. Whenever the
supplied power from PV panel is sufficient (voltage>150VDC), Inverter
converts power to the grid as generated by the PV panel. If the power is
insufficient, (voltage<100V DC) Inverter enters a “waiting” state. Whilst
“waiting” Inverter uses just enough power from the PV panel monitor
internal system status. In normal mode the green LED is on.

2. Fault mode: The internal intelligent controller can continuously monitor
and adjust the system status. If Inverter finds any unexpected
conditions such as grid problems or internal failure, it will display the
information on its LCD and light up the red “Fault” LED.

3. Shutdown mode: During periods of little or no sunlight, Inverter
automatically stops running. In this mode, Inverter does not take any
power from the grid. The display and LED’s o n the front panel do not
work.

Edition 1.6E, 2010/06 18

Front Panel arrangement

Function Key

Power-on LED

Fault LED

LED

There are 2 LED’s on Inverter, one is green and the other is red.
Normally, only the green LED switches on during operation. Their
indicated status is explained as follows:

1. Power on (green LED): It light s to in dica te that Inverter is running.

2. Fault (red LED): Illuminates du ring a “fa ult” or “failure”. Details of

Function Key

P

a

c

=

x

x

x

x

.

x

W

P

a

c

=

x

x

P

a

possible faults and their solutions can be found in Chapter
6,”Inverter Status”.

x

c

=

x

x

x

x

.

x

W

x

.

x

W

LCD (Liquid
Crystal Display)

Function Key is a key on PV-Inverter which can be pressed so as to
rotate between each menu.

Accuracy of the reading

Normally, the accuracy of LCD reading is around ±2%. In all ranges of
operation, the accuracy is up to ±5%.

19

g

Front Panel

Operating Inverter is quite easy. During normal operation, Inverter runs
automatically. However, to achieve maximum conversion efficiency of
Inverter, please read through the following information:

1. Automatic ON-OFF: Inverter starts up automatically when DC-power
from the PV panel is sufficient. Once the PV-Inverter starts it enters
one of the following 3 states:

z Standby: The PV string can only provide just enough voltage to

minimum requirements of the controller.

z Waiting: When the PV string DC voltage is greater than 100V,

Inverter enters a “waiting” state and attempts to connect to the
grid.

z Normal operation: When PV string DC voltage is greater than

150V, Inverter operates in the normal state.
In this state, it feeds power to the grid.

Model

Inverter automatically stops when the PV power is
not enough.

2. S tarting-up di splay sequence: Once the PV power
is sufficient, Inverter displays information as

Checking= xxxS

shown in the flow chart to the right.

3. Change display information: During normal

Normal State

operation, LCD shows the detail of PV-Inverter.
On the other hand, the display is setup to
automatically indicate the supplying power to the
grid. Each subsequent press changes the display
by press the “Function” key on the front panel.

Pac =xxxx.xW

Information during
start-up

4. Hold display: If you want to hold a specific display.

Edition 1.6E, 2010/06 20

Waitin

Repeatedly press the function key until the desired display is reached.
Release the key and press again for more than 2 second until you see
“Lock”, release the key; the information remains on the display. To
change the display again, please press the key as indicated in above
section 3. Change display information.

5. LCD backlight control: To save power, the LCD display’s backlight
automatically turns off after 10 seconds. To enable it, press the
“Function” key again.

6. Contrast control: A natural phenomenon of LCD displays is the
background color is darker at higher temperatures. At higher
temperatures, the characters may not be easily identified. In this case,
the adjust the contrast as follows:
a. Press the “Function” key repeatedly until

“Contrast” shows in the display.

b. Hold the “Function” key down for more

than 2 seconds, until display shows “Set
contrast” and a bar graph on the right.

c. Press the “Function” key repeatedly until

the display’s contrast is accept able.

d. Release the key for more than 10 seconds,

the display will show “Pac =xxxx.xW”.

e. Setting completed.

21

Contrast

Set Contrast

Set Contrast

Set Contrast

Pac =xxxx.xW

Contrast setup

Lighter

Darker

Done

LCD Display Sequence:

Pac =xxxx.xW

Etoday=xxx.xxKWh

Eac=xxxxxxkWh

Vdc=xxx.xV

Iac= x.xA

Frequency=xx.xHz

Feeding

Daily energy

Total energy

DC-PV voltage

Feeding current

AC-Grid freq.

Model

A1.00

Normal state

Contrast

Set language

Vac=xxx.xV

Model name

FW version

Operating status

Contrast Adj.

Set language

AC-Grid voltage

Edition 1.6E, 2010/06 22

Maximum Power Point Tracking (MPPT)

A good PV inverter must be
able to convert the maximum

IPV (A)

5

power from any PV panel. Due
to its advanced design, Inverter
PV-Inverter can track the
maximum power from your PV

4

3

2

1000W/m

800W/m
600W/m

P

2

2

2

Maximum power point

@ 1000W/m ~ 120W

PV (W)

2

125

100

75

50

panel in any condition. When the

1

displayed power on the LCD
output does not change

01020304050

dramatically, inverter is converting the maximum power from panels.
When the LCD power reading is significantly changes, Inverter is
tracking the power according to the varied sunlight.

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25

23

6. Inverter Status

Inverter is designed to be user-friendly. Therefore, the status of the Inverter
can be easily understood by reading the information that shown on the front
panel display. All possible messages are shown in the following table.

Display information

Operating conditions In English Description

Normal Working Status

Power off No display PV inverter is totally shutdown, VPV <70V

Standby Standby

Initialization & waiting Waiting

Check grid Checking xxxS

Feeding grid, MPPT Normal

FLASH FLASH FLASH firmware

Monitoring Parameters

Instantaneous Output power Pac =xxxx.xW The real time output power in xxxx W

Accumulated energy
information

Grid voltage Vac = xxx.xV Grid voltage in xxx.x VAC

Grid frequency Frequency=xx.xHz Grid frequency in xx.x Hz

Eac=xxxxxxkWh

70V≦ Input voltage <100V

Input voltage range 100~150V during

start-up. After PV voltage is higher than

100V, inverter is waiting for feeding to grid

When PV voltage> 150V, inverter is

checking feeding conditions

Inverter is feeding power . Af ter 10 seconds

of this display, LCD will show wattage.

T ot al energy that has been fed to grid since

inverter was installed

Edition 1.6E, 2010/06 24

Operating conditions In English Description

Feeding current Iac = x.xA Feeding current amount in xx.x A

PV array voltage Vdc = xxx.x V Input voltage from PV array, xxx.x VDC

Daily Energy

System Fault

Isolation failure Isolation fault

GFCI active Ground I fault

Grid failure Grid fault

No utility No Utility Utility is not available

Input voltage too high PV over voltage

Inverter Fault

Consistent failure Consistent Fault

Temperature too high Over temperature

Output relay failure Relay Failure

Etoday=xxx.xxKW

h

The accumulated kWh of that day

Earth fault of the PV-panels or failure of

surge voltage protection

Leakage current detected from ground

conductor is too high

Grid measured data is beyond the

specification (voltage & frequency)

Input voltage is higher than the maximum

input voltage

The readings of 2 microprocessors are not

consistent. It could be caused by CPU

and/or other circuit do not function well.

The internal temperature of inverter is

higher than normal value

The relay between inverter and grid is not

functional

Output DC injection too high DC INJ High

EEPROM problem EEPROM Failure EEPROM inside has data access problem

Communication failure
between microprocessors

25

SCI Failure

Output DC injection is higher than

expected

The communication between MCU inside

is abnormal

Operating conditions In English Description

DC bus voltage is too high High DC Bus

DC bus voltage is too low Low DC Bus

2.5V reference voltage inside
problem

Output DC sensor abnormal DC Sensor Fault Detection of DC output sensor is abnormal

GFCI detection problem GFCI Failure The GFCI detection circuit is abnormal

System Information

Model display

LCD contrast Contrast LCD contrast setting

LCD contrast setting Set Contrast Contrast setting of LCD display

LCD display lock Lock Hold the present display message

Ref 2.5V Fault The 2.5V reference inside are abnormal

EATON ETN1000

/ETN2000

The DC BUS voltage is higher than

expected

The DC BUS voltage is lower than

expected

Inverter model, xkW inverter

Waiting for reconnect to grid Reconnect xxxS

Firmware version Ver. xx.xx F/W version information

Setting Language Set Language Set up of the display language

The time that needs to reconnect grid

power

Edition 1.6E, 2010/06 26

7. Communications

Inverter is equipped with a powerful communications interface and options.
Use Inverter’s EZ control to monitor the status of your PV-Inverter. Also,
qualified personnel can upgrade the firmware using the RS232 port.

1. RS232: To use the RS232 port, remove the RS232 cover on the bottom

side of Inverter. It is a DB9 socket. The pin definition is

Pin Functional Description

1 N.C.
2 TxD
3 RxD
4 N.C.
5 Common
6 N.C.
7 N.C.
8 N.C.
9 N.C.

NN..CC.. mmeeaannss ““NNoo CCoonnnneeccttiioonn””

2. Optional communications port: It is a powerful extension that can accept

a special card that designed for communication purpose such as RS485.
The RS485 card can be used to work with Inverter’s EZ logger as
multiple monitoring applications.

3. Firmware upgrade: To up-to-date keep the firmware, use the RS232

port and supplied program to upgrade firmware. To do this, please
contact EATON Customer Service.

27

EATON Contact Information
Telephone: 1300 3 EATO N
Web: http://www.Eatonelectric.com.au/

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Edition 1.6E, 2010/06 28

8. Trouble shooting

In most situations, the Inverter requires very little service. However, if
Inverter is not able to work perfectly , plea se refer to the following instructions
before calling your local dealer .

z Should any problems arise, the red (Fault) LED on the front panel turns

on and the LCD displays the relevant information. Please refer to the
following table for a list of potential problems and their solutions.

System
Fault

Inverter
Failure

Display Possible actions

1. Check the impedance is between PV (+) & PV

Isolation Fault

(-) and the PV-Inverter is earthed. The
impedance must be greater than 5MΩ

2. If the problem persists please contact Eaton.

1. The ground current is too high.

2. Unplug the inputs from the PV generator and

Ground I Fault

check the peripheral AC system

3. After the cause is cleared, re-plug the PV panel
and check PV-Inverter status.

4. If the problem persists please contact Eaton.

1. Wait for 5 minutes, if the grid returns to normal,

Grid Fault

PV-Inverter automatically restarts.

2. Make sure grid voltage and frequency meet the
specifications

3. If the problem persists please contact Eaton.

1. Grid is not connected.

No Utility

2. Check grid connection cables.

3. Check grid usability.

1. Check the open PV voltage, see if it is greater

PV over

Voltage

than or too close to 450VDC

2. If PV voltage is less than 450VDC, and the
problem still occurs, please contact Eaton.

Consistent

Fault

1. Disconnect PV (+) or PV (-) from the input,
restart the PV-Inverter

2. If it does not work, please Contact Eaton.

29

1. The internal temperature is higher than

Over

Temperature

specified normal value

2. Find a way to reduce the ambient temperature.

3. Or move the inverter to a cooler environment

4. If it is not effective, please contact Eaton.

Relay Failure

DC INJ High

EEPROM

Failure

SCI Failure

High DC Bus

Low DC Bus

Ref 2.5V Fault

DC Sensor

1. Disconnect ALL PV (+) or PV (-)

2. Wait for few seconds

3. After the LCD switches off, reconnect and

check again

4. If the message reappears, please contact

Eaton.

Fault

GFCI Failure

z If there is no display on the panel, please check PV-input connections.

If the voltage is higher than 150V, call your local service.

z During periods of little or no sunlight, the PV-Inverter may continuously

start up and shut down. This is due to insufficient power generated to
operate the control circuits.

Edition 1.6E, 2010/06 30

9. Specifications

Electrical

Model EATON ETN1000 EATON ETN2000

Nominal AC power 1000W 2000W
Max. AC power
(in 10 minutes)

Input

Nominal DCV 360VDC 360VDC
Max. open DCV 500VDC 500VDC
MPPT range 150 to 450VDC 150 to 450VDC
Working range 100 to 500VDC 100 to 500VDC
Max. input current 5ADC 10ADC

Output

Operational voltage

1

(F/W Setting)

range
Operational frequency

2

range

(F/W Setting)
Current distortion <3% < 3%
Power factor >0.99 >0.99
Maximum η

European η

Environment

Protection degree IP 43
Operating temperature -20 to 55ºC
Humidity 0 to 95%, non-condensing
Heat Dissipation Convection
Power consumption <7W
Acoustic noise <35dBA

Communication & Features

LCD 1-Line, 16 characters
Comm. Interface RS232 standard, RS485 optional
F/W upgrade Yes, via RS232

Mechanical

W×D×H (mm)
Weight (kg) 11.3

Normative references

Grid interface regulation AS4777
Safety AS3100
EMC: EMS/EMI EN 61000-6-2 (2005) / EN 61000-6-3 (2007)
CE LVD: 2006/95/EC EMC: 2004/108/EC

1

Regulation voltage range is 200~270 V

2

Regulation frequency range is 45~55Hz according to AS4777.

1100W 2200W

206~264 V

206~264 VAC

AC

49.25~50.75Hz 49.25~50.75Hz

95% 96%
93% 95%

305x302x120

according to AS4777.

AC

31

∗Product specifications are subject to change without notice

Edition 1.6E, 2010/06 32