Product Details
The Woodward IRI1-I5E05D, also cataloged as the IRI1-I5E05D Earth Fault Relay, operates as a dedicated hardware component for supplemental power transformer protection within electrical protective relaying networks. Operating with a 5 A rated earth current and an auxiliary power supply of 110 V (16 to 60 V AC / 16 to 80 V DC), this unit evaluates current transformer inputs to isolate internal phase, ground, and external fault conditions across high-voltage (HV), medium-voltage (MV), and low-voltage (LV) equipment loops.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IRI1-I5E05D |
| Brand | Woodward |
| Origin | Germany |
| Operating Temp | -20 to +60 deg C (-4 to +140 deg F) |
| Power Consumption | Auxiliary Supply: 110 V (16 to 60 V AC / 16 to 80 V DC) |
| Rated Earth Current | 5 A |
| Input Interfaces | Current Transformer (CT) Inputs |
| Human-Machine Interface | Integrated Local HMI |
| Protective Function | Zero-Current Differential and Earth Fault Protection |
| Mounting Form Factors | 19-inch Rack, Door Mounting, Panel Mounting (Withdrawable) |
Harmonic Distortion Suppression and Vector Feedback Response
The Woodward IRI1-I5E05D incorporates high-speed current vector feedback response to maintain precise trip threshold accuracy during system transients. Internal signal conditioning suppresses harmonic distortion to prevent false tripping caused by magnetizing inrush currents during transformer energization. By calculating star-point current vector summation, the internal processing unit executes high-resistance ground fault detection while maintaining transient stability across upstream and downstream breaker control circuits.
Frequently Asked Questions
Q: What mounting options are supported for the withdrawable chassis of the IRI1-I5E05D relay?
A: The relay module supports 19-inch rack mounting, door mounting with sealable protective covers, and flush panel mounting, all featuring withdrawable chassis access.
Q: How does the star-point current connection enhance earth fault protection performance?
A: Connecting the star-point current enables zero-current differential calculations, allowing the relay to detect low-level ground leakage currents while isolating external through-fault conditions.
Field Installation Guidelines
- Ensure auxiliary supply voltages match the hardware terminal specifications of 16 to 60 V AC or 16 to 80 V DC prior to energizing the unit.
- Short-circuit all secondary current transformer (CT) loops before inserting or withdrawing the IRI1-I5E05D relay module from its housing sleeve to prevent dangerous overvoltages.
- Ground the relay frame terminal directly to the panel earth bus using a short, low-impedance copper conductor.
- Route current transformer signal cables in twisted shielded pairs, terminating the shield at a single ground point to avoid circulating ground loops.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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