For checking circuit breaker and protective relay systems, a secondary injection test set is the main piece of electrical test equipment to use. It differs from the standard primary injection testing method in that there is no current flowing and contacts remain closed during the testing process.
Because trip units serve a critical role in electrical systems, companies must actively test them to prevent electrical faults from causing equipment failure or accidents. Secondary injection tests pinpoint any defects in the trip unit or other protective systems ensuring that systems are functioning normally.
The 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.
The 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.
Each Protec office maintains a full complement of electrical test and measurement equipment. Offering equipment from all of the premiere manufacturers for rent, lease or purchase, Protec has the electrical testing equipment you need to get the job done.