WOODWARD 5448-897C Digital Differential Protection Relay

Product Description

Model: 5448-897C, Brand: Woodward. It is an ESDR4 series digital differential protection relay, a current differential protection device for generator sets, transformers and busbars. Adopting microprocessor architecture, it features high-precision current sampling, fault identification and event recording. Front panel flush mounting and configurable multiple protection logics. The relay can rapidly detect phase short circuits and internal winding faults to trigger tripping and alarm. With strong EMC anti-interference performance, it is widely deployed for primary equipment protection in power stations and industrial captive power systems.

Technical Specifications

• Model: 5448-897C
• Brand: Woodward
• Type: Digital Current Differential Protection Relay (ESDR4)
• Power Supply: 24V DC (±25%)
• Max Power Consumption: ≤6W
• Protection Accuracy Class: Class 1
• Dimension: 144 × 72 × 199 mm
• Panel Cutout: 138 × 68 mm
• Protection Class: Front IP42, Rear IP21
• Terminals: Screw terminals for 2.5~4mm² cables
• Operating Temperature: -20℃ ~ +70℃
• Certifications: UL/cUL, GL, CE
• Functions: Current differential protection, overcurrent protection, fault waveform recording, event log, alarm output
• Features: Microprocessor-based digital protection, programmable setting values, fault memory, EMC immunity, front panel LED status indication

Application

Used for differential protection of generators, transformers, busbars and medium voltage feeders in power systems:

1. Internal fault protection for generators in thermal power plants and combined cycle power plants
2. Protection for industrial captive power stations, diesel / gas generator sets
3. Medium voltage transformer and busbar differential protection in factories
4. Power protection systems for offshore platforms and marine power stations
5. Captive power system protection for oil, gas and chemical plants Function: Collect current signals from both sides in real time and detect internal short-circuit faults by current difference comparison. Output trip signal promptly to isolate faulty equipment and protect generator and transformer windings, preventing fault escalation and severe equipment damage. Event log facilitates post-fault investigation and analysis.

Related Series Models

5448-897C (ESDR4) 5448-897 (Standard ESDR4) 5448-897TB 5448-897TM LR20021 LR20459 LR20590