The Megger MPRT8445 Three Phase Protective Relay Test System is a multipurpose, light-weight, field portable test set. The unit is capable of testing a wide variety of electro-mechanical, solid-state and microprocessor-based protective relays, small molded case circuit breakers, motor overload relays and similar protective devices. The Megger MPRT8445 Three Phase Protective Relay Test System may be customized by adding the number of Voltage-Current, “VIGEN”, modules needed for specific test applications.