Guarantee - ABB REU 523 Technical Reference Manual

Combined overvoltage and undervoltage relay

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REU 523

1.4.

Combined Overvoltage and Undervoltage Relay

Technical Reference Manual

• Two normally open power output contacts

• Two change-over type signal output contacts

• Output contact functions freely configurable for desired operation

• Three accurate voltage inputs

• Galvanically isolated binary input with a wide input voltage range

• Optical PC-connector for two-way SPA-bus data communication (front)

• RS-485 connector (rear), for system communication

• Continuous self-supervision of hardware and software. At a permanent fault all

stages and outputs are blocked.

• Rated frequency user-selectable 50/60 Hz

• Nominal voltage user-selectable 100/110/115/120 V

• User-selectable password protection for MMI

• Display of primary voltage values

Guarantee

Please inquire the guarantee of your nearest ABB representative.

1MRS 750942-MUM

ABB Automation

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