TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 1 15/10/08 Thomson Power Systems
2.3. AC VOLTAGE SENSING INPUT
The TSC 900 can accept direct AC voltage sensing inputs on the generator, utility and load
from 120-600VAC (nominal). Sources up to 600VAC (phase to phase) and can connected wye
or delta with grounded or ungrounded neutral without the need for additional sensing
transformers. The TSC 900 voltage sensing can support the following types of electrical
systems:
2.4. AC CURRENT SENSING INPUT
The TSC 900 can accept 4 x 0-5Aac current inputs from the secondary windings of current
transformers (CT’s). CT’s are to be connected on the load side of the ATS (Phase A,B,C & N).
Wiring of CT primary and secondary windings must be done in strict accordance with
schematic diagram to ensure the correct phasing on 3 phase systems.
WARNING
Do not unplug any current transformer inputs while
energized as severe high voltages can develop which may
cause personal injury or death.
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