ABB RARIC User Manual

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RARIC
Shaft current protection
• Sensitive protection for bearings of large rotating machines
• Operates for shaft currents larger than 0,3 - 0,8 A AC, depend-
ing on the diameter of the shaft
• Fundamental or third harmonic operating principle
• AC or DC powered, galvanically isolated
• Shaft current transformer with test winding
• Can be applied to shafts with diameters up to 2960 mm
• Settable time delay
• Trip relay with heavy duty contacts and indicating flag
• Test switch
Features
User’s guide
1MRK 502 001-UEN
Revision: A
Issued January 2003
Data subject to change
without notice

ABB RARIC Specifications

General

Manufacturer	ABB
Frequency	50/60 Hz
Product ID	RARIC
Type	RARIC
Protection Functions	Overcurrent
Standards	IEC/EN 61008, IEC/EN 61009

Summary

1 APPLICATION

2 DESIGN

2.1 The RARIC protection

Describes the RARIC protection unit's construction and components.

2.2 The ILDD shaft current transformer

Explains the design and construction of the ILDD shaft current transformer.

3 MODE OF OPERATION

4 RECEIVING, STORAGE AND INSTALLATION

4.1 Receiving

Instructions for receiving and inspecting the protection unit.

4.2 Storage

Guidelines for storing the relay unit before installation.

4.3 Installation

Details on mounting the RARIC protection and ILDD transformer.

5 SETTING, TESTING AND COMMISSIONING

5.1 Setting

Guidance on setting the overcurrent and time delay relays.

5.2 Testing and commissioning

Procedures for performing injection and primary tests.

5.2.1 Injection test

Step-by-step guide for the injection test procedure.

5.2.2 Primary test

Method for conducting a primary test on the machine shaft.

6 MAINTENANCE

7 TECHNICAL DATA

8 DIAGRAMS

9 DIMENSION ILDD

10 MOUNTING