7sr23 High Impedance Electrical Digital Bus Bar Protection Relay For Industrial

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The 7SR23 DAD is a numeric high impedance circulating current relay that has four current inputs, it is used as a unit protection to detect phase and earth faults.

The relay can be applied to bus bars, connections, transformers, reactors, and motors.

The relay is used in Aca E high impedanceAca a c applications in conjunction with external stabilizing resistors and non-linear resistors (Metrosils). Standardized external components can be provided in an Epsilon case to facilitate design and installation.

The integral CT supervision feature detects open circuits in the CT secondary wiring circuits, a consideration where CT circuits are switched.

Relays are housed in E6 or E8 cases. Integrated logic is provided to allow the optimal configuration of relay input and output functionality. Protection, instrumentation, and metering functionality are accessible via data comms channels. A front fascia USB port for local connection and RS 485 rear port for remote connection are provided as standard, additional rear ports are available as options.