Description
Manufacturer: Woodward SEG Part Number: WIP11I1E1 Internal No.: 503028-001 Product Type: CT-powered Time Overcurrent & Earth Current Relay (WIP1 series)
Product Overview
The WIP11I1E1 is a transformer-fed protective relay designed for overcurrent and earth fault protection. It draws operating energy directly from 1A current transformers, no auxiliary supply required. Widely deployed on generators, medium-voltage switchgear and distribution networks for ANSI 50/51 protection functions.
Technical Specifications
| Parameter | Value |
|---|---|
| CT Input Rating | 1 A |
| Protection Functions | Time overcurrent, instantaneous overcurrent, earth fault protection (ANSI 50,51) |
| Communication | RS485, Open Data Protocol |
| Power Source | Self-powered via CT, no auxiliary voltage |
| Mounting | Panel mount |
| Weight | 1.8 kg |
| Dimensions | 260 × 140 × 120 mm |
| Country of Origin | Germany |
Key Features
- Self-powered design, operates purely from CT secondary current; works even when station auxiliary power fails.
- Combined phase overcurrent and residual earth fault protection in single unit.
- Fully configurable trip curves, adjustable pickup and time delay settings.
- RS485 serial port for remote parameterisation, fault recording and status interrogation.
- Robust hardware for industrial power plant & substation environments.
- Suitable for generator, motor and feeder protection applications.
Application Scenarios
- Generator protection in power stations
- Medium voltage distribution feeders
- Motor protection for large industrial drives
- Islanded power networks where auxiliary supply reliability is critical
Installation & Maintenance Notes
- Connect only to 1A current transformers as specified.
- Verify CT polarity before commissioning; incorrect wiring leads to protection malfunction.
- Download fault event logs via RS485 for post-trip root cause analysis.
- Inspect wiring terminals periodically for corrosion or loose connections.
- Test protection characteristic curves during scheduled outage maintenance.
FAQ
Q: Does WIP11I1E1 need 24V/110V auxiliary power supply? A: No. It is CT self-powered, the relay gets energy from the connected 1A current transformers.
Q: What ANSI codes does this relay support? A: ANSI 50 (instantaneous overcurrent) and ANSI 51 (time overcurrent), plus earth fault protection.
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