Galaxy PWTM 100 to 225 kVA
maintenance
maintenance configuration
single-UPS unit
See figure 19. During maintenance, the UPS must be isolated from the normal and bypass AC source, the battery and the load.
■UPS isolation
Proceed in the following order (see figure 20):
Q1
1
2
A
QF1
D
Q4S
B
Q5N
C
Q3BP
❏ shut down the inverter (press the "invert- |
er OFF" button 8 for three seconds), |
❏ close bypass switch Q3BP, |
❏ open isolating switches Q5N, Q4S, QF1 |
and Q1. |
Fig. 19
The UPS is powered down once the |
capacitors have discharged (a few min- |
utes); |
■ |
1
Q1
Q4S
Q3BP
Q5N
Q1 Q4S Q3BP Q5N
1 | 1 |
| 0 | 1 |
|
0 | OFF | OFF |
QF1
Following servicing, proceed in the follow- |
ing order (see figure 21): |
❏ close switch Q1, then after approximate- |
2
1
0
1
0
1
0
1
0
1
2
| 1 | 0 | I |
|
|
|
3 |
|
| 1 |
| 1 | |
0 | OFF | 0 | 0 | |||
|
|
|
ly ten seconds, switches QF1, Q5N and |
0
1
1
0
1
0
Q4S, |
1 |
| 1 |
| 1 |
1 | 0 | 0 |
❏ open bypass switch Q3BP, |
❏ start the inverter (press the "inverter ON" |
button 7 ). |
CAUTION
4 | 1 |
| 1 |
| 1 |
| 1 | |
0 | 0 | 0 | 0 | |||||
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| ||||||
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|
| QF1 |
|
|
| ||
5 |
|
|
|
|
|
|
| |
|
|
| 0 | I |
|
|
|
6 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | |
0 | ||||||||
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|
4 | 0 | 0 |
|
|
|
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| |
5 | 1 |
| 1 |
| 1 |
| 1 | |
0 | 0 | 0 | 0 | |||||
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|
|
6
■work should be car- ried out in accordance with applicable safety regulations;
■to avoid interrupting the load, the various switching operations
must be carried out in the correct order. Operations are explained in dia- grams placed next to the switches;
■the system cabinet is only partially powered down. The load is still supplied via the bypass AC source and switch Q3BP.
Fig. 20 | Fig. 21 |
28 | Maintenance |