ABB+REF543KB127AAAA

Description

The ABB REF543K is a type of relay used for protection and control of medium-voltage electrical networks.

### Product Name

**ABB REF543K B127AAAA**

### Product Description

The REF543K is a microprocessor-based relay designed for the protection, control, and monitoring of medium-voltage transformers and feeder applications. This relay is suitable for use in various electrical installations, including substations and industrial environments. The REF543K offers protection functions such as overcurrent, earth fault, and transformer protection, combined with control and monitoring features that enhance operational safety and efficiency.

### Product Parameters & Specifications

1. **Protection Functions:**
– Over Current Protection (OC)
– Earth Fault Protection (EF)
– Transformer Differential Protection
– Phase and Earth Fault Directional Protection
– Over/Under Voltage Protection
– Frequency Protection
– Thermal Protection (Inrush and Motor Protection)
2. **Communication Interfaces:**
– IEC 61850 compliant for substation automation
– MODBUS RTU Support
– Serial communication ports (RS232, RS485)
– Ethernet connectivity for remote monitoring
3. **Display & User Interface:**
– LCD display for visibility of configuration, monitoring, and status
– Push buttons for easy operation
4. **Auxiliary Power Supply:**
– Operating voltage range typically from 110-230 V AC/DC depending on configuration
5. **Inputs/Outputs:**
– Configurable digital inputs and outputs for control signals
– Relay outputs for alarms and trip signals
6. **Physical Specifications:**
– Enclosure type: Compact design, suitable for panel mounting
– Operating temperature range: -25°C to +55°C
7. **Standards Compliance:**
– Complies with relevant IEC standards for electrical equipment and protection relays.

### Product Use

The ABB REF543K relay is primarily used in:

– **Substation Automation:** For controlling and monitoring transformer and feeder circuits in power distribution systems.
– **Medium-Voltage Protection:** Ideal for applications such as overhead line protection, transformer protection, and motor protection in industrial settings.
– **Data Retrieval & Performance Monitoring:** It provides diagnostic tools and historical data logging to assess system performance and facilitate maintenance activities.
– **Integration into Smart Grid Systems:** Due to its communication capabilities, it is suitable for modern energy management systems and decentralized energy resources.

The REF543K enhances the safety and reliability of electrical networks, reduces the risk of equipment damage, and optimizes operational efficiency.

ABB+REF543KB127AAAA