Rent the Utility Relay Co. B-291-MP or B-292 for Secondary Injection Tests

Defective circuit breakers can allow extensive damage, personnel injury, or make an outage more widespread when a fault occurs. They can also trip when they shouldn’t causing expensive downtime.

Circuit protection is a critical factor in any electrical system. Testing circuit breakers at their full operating voltages and currents – primary testing – can be impractical and unnecessary, therefore in some situations, performing secondary current injection testing is necessary. 

Secondary injection testing is conducted when the circuit breaker is closed but is not carrying any current through its main poles, and involves connection of the circuit breaker to a test set that can inject and measure the current required in the device relay to cause it to operate. 

UtilityRelaB-291-MP-01The Utility Relay Co. B-291-MP Secondary Injection Test Set is a single-phase test set specifically designed for testing the operation of the AC-PRO-MPTM microcontroller based trip units manufactured by Utility Relay Co.

A plug-in, the AC-PRO-MP is, direct replacement trip unit for the STR trip units on the Merlin Gerin & Square D Masterpact MP breakers.

The B-291-MP can test pick-up and time delays of the various protection functions by driving current into the AC-PRO-MP on the secondary side of the CT circuit.

The B-291-MP will test AC-PRO-MP trip units programmed for 60 or 50 Hertz operation, and the AC-PRO-MP trip system with the exception of the CTs and associated wiring harness.

 

UtilityRelaB-292The Utility Relay Co. B-292 Secondary Injection Test Set is a single-phase test set specifically designed for testing the operation of the AC-PRO and AC-PRO-II micro-controller based trip units manufactured by Utility Relay Co.

Test pick-up and time delays of the various protection functions, with the B-292  by driving current into the trip unit on the secondary side of the CT circuit.

The B-292 will test 60, 50, 40 or 25 Hertz AC-PRO trip units. (The AC-PRO-II can be set for either 50 Hertz or 60 Hertz), and the AC-PRO or AC-PRO-II trip system with the exception of the CTs and associated wiring harness.

 

Protec offers multiple locations to better serve your needs, and electrical testing equipment rental options that work for you.


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