Megger
Megger SPI2000 Smart Primary Injection Test System
Megger SPI2000 smart primary injection test system for substation testing.
Megger SPI2000 smart primary injection test system for substation testing. Primary injection puts real current through the whole protection chain, from the CT through the relay to the breaker, which is the only way to prove the scheme works end to end. Secondary injection tests the relay; it says nothing about the CT or the wiring in front of it.
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