Breaker Testing | The EI Group

CIRCUIT BREAKER TESTING

Tests for circuit breakers are performed according to the voltage capacity of the breakers and the amperage. These tests are performed using various meters and testers. The purpose of testing a circuit breaker is to verify that it will in fact trip when needed.

The circuit breakers that need to be tested are generally 3Ø breakers that are over 400 amps. Main circuit breakers inside the switchgear are what needs to be tested first and foremost.

Here at EI, we use the NETA guidelines for testing parameters as well as the spec sheets for each circuit breaker. Every manufacturer has a guideline for what their circuit breaker can handle before blowing up or not tripping.

Contact Timing Test
Contact timing testing measures the time between order initiation and the closing or parting of the contacts. This is captured as a component of time or speed.

Functional Test
Functional testing assesses whether the circuit breaker is functioning properly. We look and test against the physical mechanical operation of the breaker.

Contact Resistance Test
Contact resistance testing measures the contact resistance between parts that conduct current. This is performed using a megger and multi-meter.

Tightness Test
Tightness testing is the manual testing of breaker connections for tightness. We use the NETA guidelines for proper torque.

Trip Settings Test
The breaker is removed from the equipment and tested against the as found settings within the breaker (Long Time, Short Time and Instantaneous). This is performed using a breaker injection tester.

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