TS 830 TRANSFER SWITCH
PM059 REV 9 14/01/16 6 Thomson Power Systems
3. GENERAL DESCRIPTION
Thomson Power Systems TS 830 series of Automatic Transfer Switches employ two mechanically
interlocked enclosed contact power switching units and a microprocessor based controller to
automatically transfer system load to a generator supply in the event of a utility supply failure.
System load is then automatically re-transferred back to the utility supply following restoration of the
utility power source to within normal operating limits. Transfer switches with MEC 2, MEC 20 or MEC
310 controllers installed have integral engine-genset auto start control & monitoring features and
therefore these applications do not require an engine-mounted auto start control panel.
The standard TS 830 series Automatic Transfer Switch is rated for 100% system load and does not
require upstream over current protection. Refer to Section 6 of this manual for detailed information
on over current protection.
The TS 830 series transfer switch may be supplied with type TSC 80e, TSC 800, MEC 310 or MEC
20 controllers as specified at equipment order. All controllers are microprocessor based which
provides all necessary control functions for fully automatic operation. The controllers are mounted
on the door of the transfer switch enclosure and operating status is shown via LED lights and/or LCD
display dependent upon controller type. For further information on the controller utilized, refer to
separate instruction manuals.
The power switching devices used for the Utility and Generator sources are operated by an
electrically driven motor mechanism in the transfer switch. The transfer switch motor utilizes the
power from the source to which the electrical load is being transferred. The mechanism provides a
positive mechanical interlock to prevent both power switching units from being closed at the same
time, which allows an interrupted “break-before-make” transfer sequence.
Note: For the purpose of this manual, the following standard nomenclature is utilized:
Utility: to indicate the source of primary power
Generator: to indicate the source of standby power
Power switching device: to indicate the transfer switch power switching device
3.1. PRODUCT MODEL CODE
The type of TS 830 series transfer switch supplied is identified by way of a 21 digit product
code which appears on the equipment rating plate (MODEL) on the door of the transfer
switch, and on the transfer switch drawings. The model code structure and definitions are as
follows:
