LEGRAND Megaline Operating Manual

UPS Megaline

Operating and Maintenance Manual

®

Part. LE05744AA-08/12-01 GF

®

2

EN

ENGLISH 3

UPS Megaline

UPS Megaline

3

Operating and Maintenance Manual

1 Introduction 4

1.1 Important information 4

2 Funzionamento 5

2.1 Operating principle 5

2.2 Mains operation 6

2.3 Battery operation 6

2.4 By-pass operation 6

2.5 Information provided by the display 6

2.6 Visual and acoustic warning signals 7

3 Installation 8

3.1 Prior to installation 8

3.2 Where to install your UPS 8

3.3 Front panel 9

3.4 Installation procedure for a single cabinet UPS 9

3.5 Presetting for the expansion of autonomy 11

3.6 Installation procedure for a double cabinet UPS 12

3.7 Guide to using the diagnostics software 14

3.8 Operating procedures 14

4 Customising the UPS operating mode 15

4.1

The functions of the buttons 15

4.2

The “Service Mode” function 15

4.3

Accessing menus 15

4.4

UPS status 16

4.5

UPS configuration 18

4.6

Events 22

4.7

Programming 23

4.8

Tools 24

5 Specifications 24

5.1

Construction specifications 24

5.2

Environmental specifications 25

5.3

Electrical input specifications 25

5.4

Output waveform 26

5.5

Electrical output specifications when running on mains power 26

5.6

Electrical output specifications when running on battery power 27

5.7

Battery operation 28

5.8

By-pass specifications 29

5.9

Reference standards 29

6 Troubleshooting 30

Index

4

®

1. Introduction

Thank you for choosing to purchase a LEGRAND® product. Our company’s main objective is to supply innovative products
that are the outcome of our ongoing research and application of cutting-edge technology.
Our products are covered by several international patents, emblematic of LEGRAND®’s quest for exclusivity and ongoing
improvement.
LEGRAND® uninterruptible power supplies are designed to protect electronic equipment from problems that may be
encountered with your mains electricity supply, such as power cuts, surges and interference.
In particular, the product you have purchased is enhanced with our exclusive “State of Charge Algorithm” which makes it
possible for your UPS to achieve the best possible performance in terms of autonomy.
Our products comply with international standards: an additional guarantee of the quality of our products.

We recommend you read this manual carefully and keep it for future reference.

1.1 Important information

• Do not connect loads in excess of the limit stipulated on the product’s label and in the relative documents provided.

• Do not dismantle the UPS. Only authorised technical personnel are allowed access to the internal parts of the UPS.

• Never disconnect the UPS from the mains power supply when it is running: this would cut off the earth protection of
both the UPS and of the loads connected to it.

• Do not insert screwdrivers or other items inside the ventilation holes or into the fan.

• The UPS must be installed according to the instructions in this manual and in compliance with the set limits.

• Take care that no liquids come into contact with your UPS.

• This product should only be employed for the designated uses described in this manual.

• The manufacturer is not liable for any damage or injury caused by failure to comply with the instructions in this manual.

All the information contained in this manual is provided as a guide and is subject to change without notice for
product upgrading.

UPS Megaline

Operating and Maintenance Manual

5

2. Operation

Block diagram

2.1 Operating principle

When the mains supply is present, the input voltage is filtered and rectified by a special input stage (power factor corrector)
which is able to optimise the absorption of current from the mains, so that the power factor becomes practically unitary,
and to compensate for any shifts in voltage. This stage is able to supply the output inverter even in conditions of very low
mains voltage.
This feature becomes very striking with very low loads: with a load of around 50% nominal load, mains operation is
possible as low as about 100 V without any exploitation of battery power. This enables more “intelligent” management of
the switchover to battery power, minimising use of the batteries. The voltage is rectified at the first stage and then taken
up by a high frequency inverter to produce the ‘clean’ sinusoidal output voltage, offering very low distortion rates.
A rapid, synchronised by-pass circuit intervenes during peaks of absorption above the inverter’s capacity, for example
when certain peripherals are switched on, demagnetisation of large colour monitors, etc.
Should the mains voltage fail or be subject to excessive sag, a booster stage is automatically activated.
This employs the batteries and safeguards the supply of power to the output inverter, and thus to the load, without any
break. The circuitry is a passing neutral type, i.e. with no alteration of the neutral system of the appliances connected to it.
During normal operation, a sensor verifies the difference in potential between the neutral wire and the earth wire: should
this be excessive, it will activate the input protection and switch the UPS over to battery mode, signalling the anomaly.
It is, however, possible to modify the parameters of the software so that only signalling is provided, if preferred.
All the UPS functions are supervised by a microprocessor that is also able to control and memorise certain operating
conditions, in addition to managing the UPS interface with a computer by means of a RS 232 serial line.

This makes it possible to control the operating functions and any anomalies in real time.

The UPS keeps the operator informed regarding its operating status using visual and acoustic signals:

- alphanumeric display 1 on page 9

- status indicator 7 on page 9

- acoustic signal (located inside the UPS)

~

=

~

=

=

=

By pass

Input

Input
Filter

Batteries

Batteries

Output

Filter

Inverter

Power
Factor

Corrector

Voltage
Booster

Battery
Charger

Power
Module

Power Module

Micro­processor
Logic

RS 232

Interface

Remote
Control

Output

6

®

2. Operation

The combination of these signals enables rapid and intuitive understanding of its operating status and recognition of any
problems in the power supply.
There are three main operating modes

- Mains operation

- Battery operation

- By-pass operation

2.2 Mains operation

This is considered the normal operating condition:

- mains voltage is converted by the power factor corrector (PFC) into continuous current

- the inverter reconstructs the sinusoidal voltage from the continuous current

- the output filter provides extra “cleaning” of the output voltage

- the batteries are recharged

2.3 Battery operation

When there is a mains power failure, the UPS automatically switches over to battery mode.

- the voltage of the batteries is increased by the “booster” circuit

- the inverter reconstructs the sinusoidal voltage from the continuous current

- the output filter ensures the voltage supplied to the load is clean

2.4 By-pass operation

The by-pass circuit excludes the UPS and connects the output directly to the input. The switchover takes place in a
synchronised manner in order to ensure the correct output voltage is always guaranteed, preventing the risk of a break
in power or excess voltage.
The intervention of the by-pass circuit can be customised by means of a dedicated menu (Config. UPS, By-pass) which
provides many options (automatic, disabled, by-pass in load waiting mode, etc.) in order to meet the specific demands
of the application.

2.5 Information provided by the display

The main messages provided by the alphanumeric display in the three different operating modes are illustrated below.

UPS on mains

UPS

On Mains Indicates normal operating status, when mains voltage is present.

On Battery

Indicates that there is no mains power and the UPS is using its batteries
to supply power.

On By-pass

Indicates that by-pass operation has been turned on: the output of the
UPS is connected directly to the mains.

IN xxxV

Indicates the UPS input voltage and the RMS power absorbed by the
mains. This message is not displayed during battery operation.

OUT xxxV/x,xKW (xx%)

The current power is also given as the percentage of the total power that
the UPS is able to supply.

Batt.

xx,x?

Indicates the state of charge of the batteries in a chart format and the
autonomy available in a numeric format.

UPS Megaline

Operating and Maintenance Manual

7

2.6 Visual and acoustic warning signals

NB: press to silence the acoustic signal. The signal will be silenced or enabled each time this button is pressed.

Status

indicator

Acoustic

signal

Messages
displayed

Description

Green -

UPS on Mains

IN xxxV

Normal operation with mains present and
loads within the set limits

Green

Fast flashing

-

UPS on Mains

No sync mains

xx.xHz

The UPS is indicating that the frequency of
the output voltage is not synchronised with
the input voltage. The cause of this may be:

- PLL disabled

- Frequency of the input voltage is outside the
set limits for the UPS

Yellow

Short intermittent

sound (every 20sec)

UPS on Batteries

MAINS ABSENT

Battery operation

Yellow

Fast flashing

- UPS on Bypass By-pass operation

Red

Fast flashing

Short and fast

intermittent sound

-

Module failure

ATTENTION!

We recommend you switch off the ups

and contact your service centre

Overload

ATTENTION!

We recommend removing some of the

appliances connected to the ups so that
consumption by the load returns below
set limits

Red Continuous sound -

UPS error or failure

ATTENTION!

We recommend you switch off the UPS

and contact your service centre

Red

1 flash every 10 secs.

- - Above 90% of MAX load

Red

Alternating short

long flashing

Alternating short,
long intermittent

sound

RESERVE

AUTONOMY!

Autonomy reserve. During battery operation
Incorrect battery connection
Incorrect Neutral

Red

Short flashing

with pause

-

OUT OF

REDUNDANCY!

Consumption by the load is above the
redundancy that has been set.
Power board redundancy is not guaranteed in
case of failure

8

®

3.1 Prior to installation

Check the packaging has not been opened or damaged and that the product has not been damaged during transport.
Please contact your shipping agent in case of doubt.
Check the contents of the box:

• Nr.1 UPS

• Nr.1 connector for the input/output cable (single cabinet version includes multiple output socket and input cable)

• Instructions manual
We recommend you keep the equipment’s packaging materials as they can be useful should the need arise to send the
product back for repairs.

3.2 Where to install your UPS

Make sure the place where you intend installing your UPS is level and sturdy.
Please comply with the following requisites for installation (Fig. 1):

- The UPS must be located in an enclosed environment: it was not designed to operate out of doors.

- It is essential that you comply with the environmental conditions illustrated in this manual.

- Avoid placing it in very dusty or damp areas or in direct sunlight.

- Avoid places where there are inflammable liquids and/or corrosive substances.

- Ventilation must be guaranteed by placing the UPS at least 20 cm away from any walls

- Do not cover the ventilation outlets on the front, rear or sides of the UPS

3. Installation

Fig.1
Where to install
the UPS.

UPS Megaline

Operating and Maintenance Manual

9

Fig.2
Electrical
Connections.

To the mains

electricity

supply

To the loads

3.3 Front panel

1 Alphanumeric Display
2 ESC button / exit function / silence acoustic signal
3 Button to scroll backwards / increase value
4 Button to scroll forwards / decrease value
5 Enter button / confirm function / access menu
6 Button to switch on / switch off
7 Multicolour operating status indicator light (green / yellow / red)

3.4 Installation procedure for a single cabinet UPS

3.4.1 Electrical connections

Single Cabinet (fig. 2):

8 Input/Output connector
9 Input/Output plug
10 Input fuse
11 RS232 serial interface outlet (9-pin female)
12 Logic signals outlet ( 9-pin male)
13 Presetting for expansion of autonomy

10

®

3. Installation

3.4.2 Single cabinet

1. Wire up the Input-Output connector supplied as shown in figure 3, using insulated cable with wires whose section is
at least 2.5 mm

2

.

2. Insert the connector into the plastic housing and secure it using the screws supplied. Secure the wires to the housing
using the cable grip (see fig. 3).

3. Take the cover off the plug [9] by removing its screws.

4. Put the Input-Output connector into the plug [9] located on the rear of the UPS, and secure to its case using the
screws supplied (see fig. 2).

5. Check that the on/off switches of all the appliances to be connected to the UPS are OFF and connect them to the
output socket.

6. Insert the power supply plug into a power outlet that is adequate for the voltage and current required.

Input-output connector - Assembly

WARNING

Your UPS is fitted with a circuit to protect it against the risk of incorrect connections. This eventuality will be

indicated by means of its red warning light, lit without flashing, and the continuous sounding of its internal
buzzer. Should you note this signal immediately after switching the UPS on, switch it off and remove the power
supply plug immediately.

3.4.3 Precautions for installation

• Electrical connections should only be done by trained personnel

• Do not modify the electric cables supplied

• Make sure that the mains outlet is connected securely to an earth circuit

• The mains outlet, or the circuit breaker, must be installed near the appliance and must be easily accessible

ATTENTION

(for versions 3 103 46/3 103 47/3 103 48/3 103 49)

The cables supplied are fitted with an input plug and outlet sockets whose maximum capacity is 16A.
Therefore, we recommend use of direct cabling from the control panel to the connector supplied (follow instructions

for connections shown in Figs. 3 and 4 on Page 11) for applications where the anticipated UPS input current will be
in excess of 13A (e.g. 5000 VA with Vinn=184V)

ATTENTION

(for versions 3 103 46/3 103 47/3 103 48/3 103 49)

Since current dispersion towards earth of all the loads merges in the UPS protection wire (earth wire), it is essential to

check that the sum of these currents does not exceed 2.7 mA, according to standard EN 62040-1, for safety reasons.

Connector

Reference
notch

Cable grip

Plastic housing

Fig. 3
Connection
terminals housing.