Protective devices such as relays, overload Coils, Circuit breakers and CTs etc. must be checked regularly to ensure that they are always ready to operate correctly. If a fault occurs in the equipment which they are protecting the system, Routine current injection testing will quickly detect faulty or incorrectly adjusted protection circuits / devices & will be possible to prevent serious damage to the system.

Current injection testing will check that the protective circuits / devices function correctly. It is usually necessary measure the operating time. Micro controller based time interval meter can be equipped with the current injection sets. Current injection stes are designed to deliver low impedance with a controlled & measured heavy current. This literature describes only the typical range of current injection sets. Instruments of different outputs can be supplied as per requirement.