RET670/650 intelligent microcomputer protection device can provide fast and selective protection, monitoring and control functions for various types of transformers, such as two-reel transformer, three-reel transformer, power plant boost transformer and special railway transformer. Similarly, RET670 can also be used as autotransformer, RET650 phase shift transformer and shunt reactor with switching control to provide first-in protection function.

Differential protection with up to six three-phase brake current inputs allows multiple circuit breaker connections on each side RET650 of the transformer. The advanced communication capability of the device can be integrated into substation automation system or used as a stand-alone multifunctional device.

RET650 

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