Primary Injection Test VS Secondary Injection Test - Kingsine Electric Automation Co.,Ltd. - 2 views
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kingsine2024 on 19 Mar 25Primary injection testing is a comprehensive method used to evaluate the performance of solid-state units and electromechanical trip units. This type of relay injection testing involves injecting the required current directly into the system, assessing all sensors, wiring, and the current conduction path of the circuit breaker. Due to its complexity, ct primary injection test must be conducted by specialists. It is particularly essential for circuit breakers that are part of critical processes or engineered safety systems, where reliability is paramount. This testing method is also commonly used during the commissioning process, often in conjunction with secondary injection testing.