IST Series UPS (10kVA-200kVA)
User Manual 2 Overview
11
inverter. If the short-circuit is serious, the UPS input breaker and bypass breaker may trip out.
After suffering the short-circuit fault, UPS will try to restart. If the short-circuit is removed, the
UPS will switch to inverter; if the fault is not removed, the UPS will try to restart for 5 times. 5
times later, the UPS will turn to fault protection. At this time, it needs to power off or press the
touch screen to shut down the UPS, and restart the UPS, and then, it will recover normal work.
Maintenance bypass mode
When the UPS needs to be maintained and the power supply for load cannot be interrupted,
user can shut down the inverter and make the UPS works in bypass status, then switch on
the maintenance bypass breaker and switch off the mains pint breaker and bypass power
supply breaker. During the transforming of manual maintenance bypass, AC power is supplied
for load by maintenance bypass breaker. At this time, the inner UPS has no electricity,
maintainer can perform the maintenance safely.
2.3 Appearance and Structure
2.3.1 Appearance
Figure2-2 Appearance of 10kVA, 20kVA, 30kVA, 40kVA
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