Woodward IRI1-I5E05D Earth Fault Relay | Microprocessor-Based Ground Fault Protection

Brand WOODWARD

Model Woodward IRI1-I5E05D-NEW

The Woodward IRI1-I5E05D is a microprocessor-based earth fault relay belonging to Woodward‘s High Tech Line of protection relays, engineered specifically for detecting and responding to ground fault conditions in electrical power systems. As a member of the IRI1 series within the broader Woodward protection relay portfolio, the Woodward IRI1-I5E05D combines digital signal processing capabilities with a compact, panel-mountable form factor that suits both new installations and retrofit applications across industrial and utility environments.

The IRI1 series represents Woodward’s current-based protection platform, distinguished from the voltage-based IRU1 series and the more advanced MR-series relays. Within this family, the Woodward IRI1-I5E05D functions as a dedicated earth fault relay, processing analog measurement signals through internal filtering and analog-to-digital conversion to achieve precise fault detection. The relay supports configurable settings for trip thresholds and delay times, allowing engineers to tailor protection characteristics to specific system requirements without external programming equipment.

Manufactured in the United States and available through authorized industrial automation supply channels, the Woodward IRI1-I5E05D addresses the fundamental protection need of isolating ground faults before they escalate into equipment damage or system-wide outages. Its microprocessor architecture enables digital filtering that suppresses harmonics and transient DC components—factors that commonly cause nuisance tripping in analog relay designs. The relay’s LED status indicators provide immediate visual confirmation of power availability and fault conditions, simplifying commissioning and troubleshooting in the field.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	IRI1-I5E05D
Manufacturer	Woodward
Product Type	Microprocessor-Based Earth Fault Relay
Technology	Digital signal processing with analog filtering
Power Supply	230 V AC/DC
Frequency Range	50/60 Hz
Output Contact	SPDT (Single Pole Double Throw)
Alarm Indication	Visual LED display for fault status
Operating Temperature	-20°C to +60°C (-4°F to +140°F)
Mounting Type	DIN Rail / Panel Mount
Dimensions	108 × 70 × 115 mm
Weight	Approximately 0.4 kg
Protection Class	Front: IP54/IP65
Certifications	CE, IEC Compliant

Main Features and Advantages

Microprocessor-Based Precision: The Woodward IRI1-I5E05D employs digital signal processing to maintain consistent fault detection thresholds over its operational lifetime, overcoming the drift and temperature sensitivity limitations of analog relay designs. Internal filtering suppresses high-frequency harmonics and transient DC components that commonly cause false tripping during switching operations.

Configurable Protection Settings: The relay supports adjustable fault thresholds and delay times via DIP switches, enabling protection engineers to coordinate the Woodward IRI1-I5E05D with upstream and downstream protective devices for selective fault isolation. This configurability ensures the relay adapts to varying system grounding characteristics without requiring external programming equipment.

Clear Visual Diagnostics: Front-panel LED indicators on the Woodward IRI1-I5E05D provide immediate confirmation of operational status and flag fault conditions as they occur. This straightforward diagnostic approach reduces troubleshooting time and eliminates dependence on external test equipment for basic fault verification.

Compact and Installation-Flexible: The Woodward IRI1-I5E05D occupies minimal panel space and supports both DIN rail and panel mounting configurations. Its plug-in terminal design facilitates rapid replacement during maintenance operations, minimizing downtime and simplifying retrofit projects in existing switchgear panels.

Wide Application Compatibility: With a 230 V AC/DC power supply range and SPDT output contacts, the Woodward IRI1-I5E05D integrates with common industrial control voltages and trip circuits, including those in generator protection systems, transformer monitoring panels, and motor control centers.