Circuit breaker testing includes electrical test, mechanical test, temperature rise test, and insulation test. Testing of circuit breakers requires highly equipped laboratories and sophisticated testing procedures. Standard specifications give and describe in detail the tests to be carried out on circuit breakers and how they are performed.

Circuit breaker is a device for closing and interrupting a circuit between separable contacts under both normal and abnormal conditions. It is arbitrarily grouped using many different criteria such as the intended voltage application, the location where they are installed, their external design characteristics, and, perhaps most importantly, by the method and the medium used for the interruption of current. It is required to control electrical power networks by switching circuits on, by carrying load and by switching circuits off under manual or automatic supervision. It is also designed to open a circuit automatically on a predetermined overload or ground-fault current without damage to itself or its associated equipment.

Circuit Calibrators system are used in both in public buildings and industrial plants. A unique feature or the track circuit calibrator is that its resistance elements are enclosed in the shunt cartridge, protected from tool box wear and tear. Explosion-proof measuring and calibrating equipment are multi function calibrator, circuit calibrator, universal temperature calibrator, and pressure calibrators.