Functional Description; How It Works; Single Line Diagram - ABB PCS100 UPS-I User Manual

PCS100 UPS-I User Manual 15
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2 FUNCTIONAL DESCRIPTION

2.1 How it works

When the utility voltage is normal, the load is supported directly by the utility.
When a sag, surge or outage occurs, the PCS100 UPS-I immediately transfers the load onto its inverter. Power is
provided by battery or Ultracapacitor energy storage.
Batteries are typically used to bridge start-up time for generator backup systems where critical applications may
be subject to longer supply outages.
Ultracapacitors are ideal for protecting the load from sags and short-term outages or to bridge the switching
time to another feeder.
Power supply before Power supply after
PCS100 UPS-I PCS100 UPS-I
Power Quality Event Power Quality Event
Occurs Corrected
Figure 2-1: PCS100 UPS-I concept

2.2 Single Line Diagram

The ABB PCS100 UPS-I is a robust single conversion UPS providing continuous current flow to the load during
transfer due to the revolutionary high speed Utility Disconnect and fast PCS100 Inverter technology. The modular
inverter construction and robust Fail-Safe Bypass provides the highest efficiency and system availability. The
single conversion design with Coupling Transformer enables simple, low footprint construction with wide range
of operation voltages, galvanic isolation of DC Energy Storage system and robustness for industrial loads.