Function Of The Circuit Breakers - AEG Protect 5.31 Series Operating Instructions Manual

5.2

Function of the Circuit Breakers

i
Protect 5.31/xxx-480-220-120 10 kVA - 120 kVA
Load interrupter switch Q1:
The rectifier is switched over to the REC circuit using load interrupter
switch Q1 (Figure 2). The open-circuit shunt release of Q1 reacts in
the event of a fault (e.g. short circuit) so that the rectifier is isolated
from the REC circuit.
In the event of maintenance and/or service work, the rectifier can be
disconnected from the power supply with Q1 and by opening the
battery isolator (external).
Manual bypass switch Q29
Switch Q29 (Figure 2) is located externally to fully disconnect the
UPS. It can, however, also be installed in the unit as an alternative. It
permits switchover of the loads to the mains input of the SBS without
interruption. This switchover is only permitted if the inverter has been
switched off and the SBS activated
(see also Chapter 5.1.4 Operation with Manual Bypass).
NOTE:
The Protect 5. 31/xxx works setting of Q29 is "1", i.e. not
activated. This setting is for normal UPS operation.
Inverter output contactor K7:
Inverter output contactor K7 (Figure 2) switches the output voltage of
the inverter to the load output.
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