Shutdown (cont.)
Multi-bypass modular UPS
◗shutdown each UPS (see section "shutdown of a unit");
◗the load is supplied via the Mains 2 of each UPS;
◗close switch Q3BP on each UPS, the load is supplied by the Mains 2, via the bypass lines (Q3BP) of each UPS;
◗open switches Q5N, Q4S, Q1 and QF1 on each UPS, the situation is that shown in the figure opposite;
◗the UPSs are
Modular UPS 1 | Q3BP |
|
| static switch |
|
| Q4S |
|
rectifier- | inverter |
|
charger |
| |
Q1 | Q5N |
|
mains 1 |
|
|
| QF1 |
|
mains 2 | battery |
|
Modular UPS 2 | Q3BP | load |
| ||
|
| |
| static switch |
|
| Q4S |
|
rectifier- | inverter |
|
charger |
| |
Q1 | Q5N |
|
mains 1 |
|
|
| QF1 |
|
| battery |
|
Frequency converters
(no Mains 2)
Shutdown of the inverters results in the interruption of the load;
◗shut down each inverter (see the "shutdown of a unit" section);
◗open battery circuit breaker QF1 and Mains 1 input switch Q1 on each unit;
QF1
ON OFF | |
(I) | (0) |
Q1
ON OFF | |
(I) | (0) |
Q5N
ON
(I)
◗the system is powered down (except the Mains 1 cables upstream from switch Q1). A full powering down requires the opening of the upstream protection device on Mains 1.
Parallel UPSs with SSC
(with Mains 2)
◗shut down each inverter (see the "shutdown of a unit" section);
◗carry out the maintenance bypass operation in the Static Switch Cubicle (the load will be directly supplied by Mains 2 via maintenance bypass switch Q3BP);
◗close switch Q3BP and open switches Q5N and Q4S in the "static switch" cubicle;
◗open fuse switches Q1 and Q2 in the Static Switch Cubicle;
◗open battery circuit breaker QF1 in each UPS (except for frequency converters without a battery);
◗open input switch Q1 for each UPS;
◗the UPSs are powered down (except
the Mains cables upstream from switches Q1, Q4S and Q3BP) and the load is supplied by Mains 2.
All the lights on the control panel are off. A full powering down requires load shutdown and the opening of the upstream protection devices on Mains 1 and 2.
Buzzer reset
◗first determine the cause of the alarm;
◗press the "buzzer reset" button 11 on the hidden control panel on the concerned cubicle.
The buzzer stops, but a new alarm will set it off again.
A B C D E F G H I J K L M N
1 | 2 | 3 | 4 | 5 |
11
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