ABB PCS100 AVC-20 - Functional Description; How it works; Regulation Capabilities

12 PCS100 AVC-20 User Manual
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2 FUNCTIONAL DESCRIPTION
2.1 How it works
The PCS100 AVC-20 is a three-phase low voltage product which provides effective, efficient voltage regulation
where industrial or commercial processes demand a clean, readily available, and consistent supply of power. The
PCS100 AVC-20 requires no energy storage as it draws the additional current required to make up the
compensating voltage from the utility supply.
Power supply before
PCS100 AVC-20
Power supply after
PCS100 AVC-20
Figure 2-1: PCS100 AVC-20 Concept
2.2 Regulation Capabilities
he PCS100 AVC-20’s performance with undervoltage is adaptive to load conditions. Based on the loading of the
unit or load power factor the PCS100 AVC-20 fully regulates undervoltage from down to 80% of the nominal
voltage.
Detailed regulation capabilities are shown in the following table.
Utility Supply Problem
Input
Output
Note
Continuous undervoltage
(brownout)
85% supply voltage
100%
Load power factor
1.0
80% supply voltage
100%
Load power factor
0.75
70% - 85% supply voltage
See graph below
Load PF dependable
Continuous overvoltage
120% supply voltage
100%
130% supply voltage
110%
Correction of phase angle errors created by faults in the supply
system
Yes
Correction of voltage imbalance from utility supply
Yes
Attenuation of flicker voltages in the utility supply
Yes (downstream)
Table 2-1: PCS100 AVC-20 regulation capabilities