ABB REF543KB127AAAA Protective Relay Module for Power Systems

Operating Voltage:230 V AC

Current Rating:10 A

Input Signal Range:-10 V to +10 V DC

Communication Interface:Modbus RTU

Operating Temperature:-20°C to +60°C

Protection Class:IP20

Weight:0.3 kg

Dimensions:120 x 100 x 60 mm

Control Protocol:ASCII, Binary, ASCII with Holding Registers

The ABB REF543KB127AAAA is a highly reliable and accurate protective relay module specifically designed for power distribution systems. It ensures the safe and efficient operation of electrical networks by providing robust protection against various faults such as overcurrent, overvoltage, undervoltage, and phase disconnection.

This module comes equipped with digital inputs and outputs for seamless integration with other control systems and devices, allowing for efficient monitoring and control. It supports Modbus RTU communication protocol, facilitating easy data exchange and management.

Built to withstand harsh environmental conditions, the ABB REF543KB127AAAA operates reliably within a wide temperature range (-25°C to +70°C) and can be stored in extreme conditions (-40°C to +85°C). Its humidity resistance up to 95% (non-condensing) ensures consistent performance even in humid environments.

The compact design of the ABB REF543KB127AAAA allows for easy installation and maintenance, making it ideal for both new installations and retrofits. Its dimensions (210 mm x 170 mm x 80 mm) and lightweight (1.5 kg) make it an excellent choice for space-constrained applications.

With its certification to international standards such as IEC 61000 and IEEE C37.90, the ABB REF543KB127AAAA offers peace of mind and ensures compliance with global safety and quality regulations.

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