Recent Articles
Secondary Injection Test: Complete Procedure, Logic Checks, and Acceptance Criteria
Secondary injection test is a controlled process of verifying the correct operation of protection relays and associated control circuits without energizing the primary power equipment. In the secondary injection test, a calibrated test kit injects low level current and voltage signals directly into the relay’s secondary terminal, simulating …
Primary Injection Test Explained: How to Verify Your Protection System
The primary injection test is a critical commissioning and maintenance test which is used to verify the operation of current based protection schemes used in substation. In the primary injection test, a high current is injected into the primary circuit of equipment such as current transformer, circuit breaker, …
