Schneider REL52034 Easergy P3U20 Numerical Protection Relay

The Schneider REL52034 Easergy P3U20 Numerical Protection Relay focuses on feeder protection applications that require a compact relay configuration without sacrificing essential protection and monitoring functions. With 4 ring lug current inputs and a single voltage input, this model fits installations where current-based protection takes priority and only basic voltage measurement is required.

The relay combines protection, control, and monitoring functions in one device. Its 10 digital inputs and 5 digital outputs provide enough flexibility for feeder control, alarm handling, breaker status monitoring, and trip commands. The wide digital input range of 24–230 V allows the relay to work with different control voltages commonly found in industrial plants, substations, and utility networks.

RS485 communication enables connection to SCADA and automation systems for remote monitoring and operational data exchange. Ring lug current terminals provide secure wiring connections, making the relay suitable for both new installations and panel modernization projects.

Specifications

• Manufacturer: Schneider Electric
• Product Series: Easergy P3
• Model: P3U20
• Part Number: REL52034
• Relay Type: Numerical Protection Relay
• Protection Application: Feeder Protection
• Current Inputs: 4L Ring Lug
• Voltage Inputs: 1U
• Digital Inputs: 10 DI
• Digital Outputs: 5 DO
• Auxiliary Supply Voltage (Uaux): 48–230 V AC/DC
• Digital Input Voltage Range: 24–230 V
• Communication Interface: RS485

Features

• Compact relay configuration for feeder protection.
• Four ring lug current inputs for current measurement and protection functions.
• Single voltage input for voltage supervision.
• 10 digital inputs and 5 digital outputs for control and signalling.
• Wide digital input voltage range from 24 V to 230 V.
• RS485 communication for SCADA integration.
• Event recording and fault logging functions.
• Suitable for retrofit and new panel installations.

Applications

• Feeder Protection
• Distribution Substations
• Industrial Power Distribution
• Utility Networks
• Medium Voltage Switchgear
• Electrical Control Panels
• Infrastructure Projects
• SCADA-Based Monitoring Systems

The Schneider REL52034 Easergy P3U20 offers a practical solution for feeder protection schemes that require flexible control voltages, RS485 communication, and a compact I/O configuration.