RES Products

| RETURN TO PTS-TECH HOME PAGE

Select:

	Features
	Download PDF brochure

TCT - Trip Coil Tester

Designed specifically to enable HV circuit breaker trip coils to be tested at a reduced voltage.

Powered directly from the substation battery
Output precisely settable from 5 to 95% of battery voltage
Electronic regulation ensures guaranteed constant voltage during testing
80A current capable
Trip-coil burnout protection

To ensure that circuit breaker operation is guaranteed under the most onerous conditions placed on the substation tripping supply, circuit breaker trip coils are specified to work with a minimum tripping voltage much below the nominal battery voltage. The minimum trip voltage test is described in a number of international and national standards such as IEC 56, ANSI C37.09 etc.

Traditionally, this test was performed by tapping the main tripping battery. This method however should not be utilised as it presents a considerable risk to testing personnel, battery and breaker being tested.

General purpose DC sources as well as variac-based instruments are also unsuitable due to their inability to maintain their output voltage precisely regulated at the high peak currents drawn by trip-coils.

The TCT contains a very high speed electronic voltage regulator which will accurately maintain the output voltage constant whilst very high peak currents are drawn, for a period long enough to allow the operation of the trip coil. The precise level of test voltage during the entire test is always known and guaranteed constant.

Features

Input