Auxiliary Slave Module; Transformer Enclosure; Injection Transformer - ABB PCS100 AVC-20 User Manual

PCS100 AVC-20 User Manual
5.1.5

Auxiliary Slave Module

The Auxiliary Slave is the same as the Auxiliary Master Module except it does not contain a control logic or
associated PCBs and I/O terminals. It is intended to provide power supplies, protection and distribution to slave
enclosures of up to six modules, without the intelligence provided to the entire system by the single Auxiliary
Master Module. One Auxiliary Slave is required per enclosure. Note that the 26.5 Vdc supplies developed by each
Auxiliary are not common between enclosures.

5.2 Transformer Enclosure

DANGER – Hazardous Voltages
An Operator must not open doors or panels marked as containing hazardous voltages. Many
parts in this product, including printed circuit boards operate at lethal voltages. DO NOT
TOUCH components or connections that have voltage present
The Transformer Enclosure houses the injection transformer and auxiliary circuit breaker.
Customer supply and load connection terminals are located in the Transformer Enclosure.
5.2.1

Injection Transformer

The injection transformer is connected in series with the load and injects a regulation voltage to the supply
voltage. It also converts the inverter output voltage (480 V max) to the appropriate regulation voltage level and
isolates the inverter output from the load.
When internally bypassed, the injection transformer from an electrical perspective appears as a reactor (inductor)
in series with the load.
Customer supply and load connection terminals are located on Injection Transformer. For additional information
on customer connections see section 11.
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