APC MGE 6739380EN/JC User Manual download pdf (Page 33)

6739380EN/JC - Page 33

Static Switch Cubicle

During maintenance, the Static Switch

Cubicle must be isolated from Mains 2,

the load and the parallel UPSs.

◗ if work is required on the control

electronics alone, open cubicle switch

Q4S (but not Q5N) and cubicle fuse

switches Q1 and Q2. The load can then

remain supplied by the UPSs. After

servicing, reclose fuse switches Q1, Q2

and switch Q4S.

Caution:

When the Static Switch Cubicle is

powered down using the above

procedure, only the control electronics

are in fact powered down. The power

circuits remain energized. Maintenance

on the static switch power circuits

requires shutdown of the UPSs and

transfer of the load to the maintenance

bypass line.

◗ open switch Q5N, then the

disconnector-fuses Q1 and Q2 in the

SSC;

◗ open switches Q5N, then switch Q4S

on all the UPSs (figure 33).

Caution:

Even in the maintenance bypass

configuration, the cubicle is only

partially shut down and the supply

of power to the load continues via

switch Q3BP.

◗ more extensive maintenance work

on the Static Switch Cubicle requires

the entire system to be shut down.

Fig. 33

Note:

We recommend that you call on the

after-sales support department to carry

out these operations.

Caution:

Battery maintenance is undertaken with

the system powered up. Operations

must be carried out in accordance with

applicable safety regulations by

qualified personnel using insulated

tools, gloves and safety goggles.

Batteries contain dangerous

substances that will harm the

environment if thrown away. If you

change the batteries yourself, call on

qualified organizations for battery

disposal and recycling.

Battery maintenance

Consult the instructions supplied by the

battery manufacturer. Below are a few

general indications:

◗ sealed lead-acid batteries.

These batteries require no

maintenance:

◗◗ but check the terminals of each cell

from time to time and clean if

necessary;

◗ vented lead-acid batteries:

◗◗ check the electrolyte level regularly

and add water if necessary,

◗◗ check the voltage of each cell to

determine if it is necessary to equalize

the battery,

◗◗ check the terminals of each cell and

clean if necessary.

In non-redundant systems with a

Mains 2, the load is supplied by the

Mains 2 and the Static Switch Cubicle.

In non-redundant systems without a

Mains 2, the entire system must be

shut down.

◗ start-up

Following servicing, proceed in the

following order:

◗◗ close switch Q1, then switches QF1,

Q5N and Q4S,

◗◗ start the inverter (press the "inverter

on" button 6 ).

Note:

We recommend that you call on the

after-sales support department to carry

out these operations.

mains 1

load

mains 1

mains 2

QF1

QF1

Q1

Q1

Q5N

Q5N

Q5N

Q3BP

Q4S

Pb Pb

Maintenance (cont.)

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 49 50

Comments to this Manuals

No comments