AEG IST7 - Emergency Power off Recovery; Parallel Systemstartup and Shutdown; Start Parallel System

IST Series UPS (10kVA-200kVA)
User Manual 5 Use and Operation
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1. After pressing the EPO button, the UPS is with no output, the power supply for load is
interrupted.
2. When the system stay in maintenance bypass status, after pressing EPO button, the UPS
still has output.
5.3.8 Emergency Power Off Recovery
Step 1 Ensure that the dry contact of monitor card, which connected to the external EPO switch, is
not in emergency power off status.
Step 2 Disconnect the system input, output and battery breaker, until all system indicators are off,
system power down completely.
Step 3 Close the mains input breaker (POWER), bypass breaker (BYPASS), battery breaker, system
will be started again, and EPO removes.
----End
5.4 Parallel SystemStartup and Shutdown
5.4.1 Start Parallel System
 Before start the parallel system, please perform the operation of 5.3 UPS Start and
Shutdown for each UPS.
 Before power on and test the parallel system, please ensure that the wire connection of
input and out cables and phase sequence is right and the parallel wire is well connected
and stay in disconnection status.
 Before completely starting the parallel system, please do not start load, and ensure that
all switches of load are off.
 Before performing the parallel wire operation, please do not connect the parallel wire.
Step 1 Measure the front-end voltage and frequency of all UPS input (including mains input and
bypass input) breaker or external input dIST7ribution breaker. Voltage range: 80V-280V,
frequency range: 40Hz~60Hz（50Hz system） or 50Hz~70Hz（60Hz system）.