WOODWARD ESDR4 Protection Relay

Brand:WOODWARD
Model:ESDR4
Product status: New/used
Shipping place: Xiamen, China
Warranty: 365 days
Structural form: Other (specific form may vary depending on application)
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Details

WOODWARD ESDR4 Protection Relay

Product manual:

Basic information
Product Name: ESDR4 Protection Relay

Manufacturer: WOODWARD

Type: Digital Protection Relay

Applicable objects: power system, generator, motor protection

product overview
WOODWARD ESDR4 is a multifunctional, programmable digital protection relay designed to provide comprehensive protection for generators, transformers, or busbars in industrial power systems. It integrates multiple protection functions, such as overcurrent, undervoltage, overvoltage, frequency protection, differential protection, etc., suitable for relay protection applications in medium and high voltage systems.

Main functional features
Multiple protection function integration:

Overcurrent protection (50/51)

Overvoltage/undervoltage protection (59/27)

Frequency protection (81O/U)

Differential protection, ground fault protection, phase failure detection, etc. (depending on model configuration)

Digital parameter setting and display:

Equipped with an LCD screen for parameter settings, status display, and event recording

Support local operation or remote communication configuration

Event and fault recording function:

Internal event recorder with timestamp for easy fault analysis and traceability

Can store detailed information of the last few dozen events

Remote communication capability:

Supports industrial communication protocols such as Modbus, Profibus, CANopen, etc. (depending on the model)

Easy to integrate into DCS or SCADA systems for remote monitoring and control

High reliability and anti-interference ability:

Using industrial grade electronic components, suitable for harsh environments

EMC electromagnetic compatibility design, strong anti-interference ability, in compliance with IEC standards

Technical parameters (typical)
Project parameter description
Power supply voltage 24-250V DC or 85-265V AC/DC (optional)
Input current range 1A/5A CT input (optional)
Voltage input range 57V or 230V phase voltage (typical)
Communication interface RS-485/Modbus RTU (standard), other optional
Environmental temperature range -20 ℃~+70 ℃
Installation method: Standard panel embedded installation
Protection level IP52 (front panel)/IP20 (overall)