Current Injection Testing

Using our trained and experienced engineers, ADC Rig Inspection Services provide (PI Primary Injection) Current Injection Testing services (sometimes referred to as a “trip test”) to prove the electrical protective relay systems of an onshore / offshore installation are fit for purpose and operating effectively.

Our engineers are fully trained, competent and equipped with “state of the art” single and 3-phase current injection equipment. The IEE Wiring Regulations require that master circuit breakers are tested every five years and ADC Rig Inspection Services are happy to carry this out at a time that complements the operations of our clients. ADC Rig Inspection Services recommends that primary injection testing be conducted in connection with our rig Acceptance Testing and Commissioning procedures.

Current Injection

Why conduct a PI (Primary Injection) test?

To verify proper operations.
To confirm the wiring connection of the protection system is correct.
To verify CT (current transformers) ratios and polarities.
To verify Overcurrent relays and Earth Fault relays (both DTL type) are set to the correct setting.
To verify Direct Acting Tripping element of the main MCCB.

Low voltage circuit breakers are used in distribution networks. Reliable operation of LV-breakers is in many cases very important in drilling rigs and platforms. The only way to verify that a direct-acting low voltage circuit breaker operates properly is to inject a high current.

Primary injection testing is performed by injecting a high current on the primary side of the current transformer. The entire system, including current transformer, conductors, connection points, relay protection and circuit breakers, is tested collectively and in sequence during this process. The system being tested need not be completely taken out of service during primary injection testing therefore enhancing efficiency greatly.

ADC Rig Inspection Services has the equipment, experience, expertise and working knowledge of the actual relay system philosophy that is required to assure their clients that their protective relay systems are compliant, fit for purpose and most importantly, operating effectively.