Woodward WIC1 Series User Manual

WIC1 – CT Powered Time Overcurrent
And Earth Current Relay
Manual WIC1 (Revision D)

Woodward WIC1 Series Specifications

General

Series	WIC1
Protection Class	IP20
Category	Relay
Input Voltage Range	18-32 VDC
Operating Temperature Range	-40°C to +70°C
Relay Contact Rating	5 A @ 30 VDC / 250 VAC resistive

Summary

Operating Instructions

Technical Data, Characteristics, and Features

Protective Functions and Current Settings

Introduces protective functions, focusing on minimal operating current and rated primary current settings.

Phase Time Overcurrent Protection Settings

Details setting ranges and grading for phase overcurrent protection in WIC1-1.

Earth Current Protection Settings

Covers current and tripping time settings for the earth fault protection element.

Inputs and Outputs

Remote Trip, Tripping Coil, and Flag Outputs

Details remote trip input, impulse outputs for tripping coils and flag indicators.

CT Measuring Input Specifications

Detailed Technical Specifications

Insulation, EMC, and Interference Immunity

Characteristics and Time Curves

Characteristic Curves for Overcurrent Protection

Displays various inverse time characteristic curves for overcurrent protection settings.

CT Transformation Ratio Selection Guide

Inverse Characteristic Adjustment Guide

Commissioning and Maintenance Procedures

Important Commissioning Notes and Accessories

Highlights critical notes for commissioning and lists required accessories.

Test System Selection and Checks

WIC1 Adjustment and Functional Testing Methods

Details WIC1 adjustment and outlines primary vs. secondary testing methods.

Test Currents and Switching Points

Presents test current values and switching points for overcurrent protection steps.

Special Features for Earth Current Tests

Earth Current Test Switching Points

Example Test Procedure

Maintenance and Fault Troubleshooting

Faults, Causes, and Remedies

Lists common faults, their causes, remedies, and notes on repair limitations.