Secondary Injection Test Results You Can Rely on with the Square D S33595 by Schneider

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Different from primary injection testing, secondary injection testing is normally conducted when the circuit breaker is closed and not carrying any current through its main poles.

The advantage of secondary injection testing is that the circuit breaker does not have to interrupt large current and only low voltage signals are injected to operate the device.

Secondary injection testing involves disconnection of the protective device from its normal VT/CT and connection to a specialist test set that can inject and measure/record the required operating signal directly into the protective device relay to cause it to operate the circuit breaker.

Square D by Schneider S33595 Secondary Injection Test SetThe Square D S33595 by Schneider Secondary Injection Test Set is a full function test kit that is designed to perform tests on Micrologic, NT and STR Trip units.

Available for rent, lease, or purchase from Protec Equipment Resources.  We are here to help you with your testing equipment needs.