THOMSON TSC 900 User Manual

TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 5 16/04/19 Thomson Power Systems
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3.4.4. AUTOMATIC LOAD SHED OPERATION
The TSC 900 can be configured for automatic Load Shedding operation by use of a
programmable output contact. Under normal utility power conditions, the Load Shed
control is not activated. When a utility power failure occurs and the ATS transfers to the
generator supply, the Load Shed circuit is automatically initiated for a pre-programmed
time delay setting. Once the Load Shed initiate timer expires, the Load Shed circuit is
reset. Automatic Load Shed can also be configured for automatic Load Shed based on
generator under frequency and/or ATS load kW (over power) set points. The automatic
sequence of operation is further described as per the following state diagram.
Note: to disable Load Shed feature, Load Shed Initiate and Reset timers must be set to
zero. Refer to Section 5.15 for programming instructions

THOMSON TSC 900 Specifications

General

Brand	THOMSON
Model	TSC 900
Category	Controller
Language	English