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Portable Primary Injection Test set, with stackable boosters to get increased output.
The Model SPI2000 is a high current primary injection test system with the flexibility to test a wide variety of devices such as low-voltage power circuit breakers, molded-case circuit breakers equipped with thermal magnetic or electronic trip devices, overcurrent relays, and thermal relays via primary injection.
The SPI2000 is designed to test a wide range of circuit breakers, with ratings up to 2000 A frame size. The unit is fully compliant with NEMA AB-4 test guidelines.

Enabling accurate and repetitive tests of high-current breaking devices through adaptive current injection
The SPI500 is a powerful and versatile testing system designed to meet the demanding needs of substation testing. It can handle a wide range of high-current tests, including those for electronic reclosers, circuit breakers, high-speed fuses, and ground fault relays.
With the ability to control up to two SPI500B boosters, the SPI500 can increase its testing capacity by up to three times. Its unique control system ensures accurate and reliable testing, even under changing load conditions.
The SPI500 offers both manual and automatic control options, with the Smart Touch View Interface (STVI) providing easy-to-use manual control and the PC-based control system enabling fully automated testing and report generation.
The SPI500 can test self-powered reclosers like the S&C Tripsaver with the push of one button. Also, the most portable test set for testing breakers under 600 A or for testing Modified Differential Ground Fault schemes (MDGF).

This powerful test system is designed for primary injection testing of protective relay equipment and circuit breakers. It is also used to test the turns ratio of current transformers and for other applications that require high variable currents.