2 Overview
15
Figure2-12
Bypass power supply mode (the thick solid line stands for the energy flow direction)
ECO power supply mode (just suitable for single UPS)
At the ECO mode, when bypass voltage normal, the power for load is prior supplied by
bypass, when bypass voltage abnormal, the power for load turns to inverter. ECO mode is an
economic operation mode. For the load which does not require high quality, user can select
ECO mode to reduce the energy consumption. At the ECO mode, the UPS efficiency can be
99%.
Maintenance bypass power supply mode (suitable for the system with distribution
module)
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 input breaker and bypass input
breaker, output 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.
Summary of Contents for IST9
Page 1: ...l un I Jet _________ __ AEC IST9 1 0 20 https www uni jet com catalog ibp on line ibp aec ist9...
Page 2: ...UPS IST9 10 20 kVA User Manual...
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Page 52: ...3 Installation 43 Figure3 29 Diagram of 33 mode parallel system wiring of 10kVA 20kVA UPS...
Page 54: ...3 Installation 45 Figure3 31 Diagram of 33 mode parallel system wiring of 30kVA 40kVA UPS...
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