MGE UPS Systems Comet EXtreme CLA 12 kVA, Installation Manual

51033777EN/AB

 - Page 5

2.2 Checking equipment compatibility

Check that the UPS and CLA modules are compatible:

UPS no.

Comet EX

treme

 CLA

12kVA

51033120 or 51033121

Comet EX

treme 

CLA 12kVA (Rack)

51033602

CLA no. (x2)

51033069

51033569

Conn. box no.

51033772

51033772

2.3 Batteries to be used

Use only 12 Volt/65 Ah lead-acid batteries.

Connect them as indicated below to obtai n the required backup time:

2 hours

Comet EX

treme 

CLA

12kVA

2 parallel-connected strings of 20
12V / 65Ah batteries

4 hours

8 hours

2. Installation

2.4 Connecting the Comet EX

treme

 CLA modules to the connection box

4 parallel-connected strings of 20
12V / 65Ah batteries

6 parallel-connected strings of 20
12V / 65Ah batteries

Backup time

3

L +

BA
TTERIE/BA

TTER

Y

L -

4

2

1

This operation may be carried out only by qualified electricians using the
necessary safety equipment for work on live parts (insulated tools,
gloves, goggles).

The connection of each module to the electrical supply
must be protected by an easily accessible circuit breaker
(not supplied). A module can be isolated from the
electrical supply by opening this circuit breaker.

Before making any connections or working on the
equipment, make sure the battery circuit breaker is in OFF
position and that the main contacts of the upstream
protective devices of the electrical installation are open
(OFF position).

For maximum battery life, 

Comet EX

treme

 CLA

 modules must be

installed in the same room as the UPS so that the automatic regulation
of the charge voltage as a function of temperature can work correctly.
Two cables exit the connection box. Do not modify the length of these
cables. Each of these cables must be connected to a 

Comet EX

treme

CLA

 module as indicated below.

1. Unscrew the plate and dismantle the metal cable glands on the

Comet EX

treme

 CLA

 modules.

2. Cut and remove the retainers on the shielded cables of the connection
box.

3. Mount the cable glands on the shielded cables.

4. Connect the 3 conductors of each cable and remount the plate.