SEG Electronics GmbH Technical Manual WIC1
8 DOK-TD-WIC1E, Rev. M
2. Introduction
The protection relays of the WI-LINE are offering time over current protective functions and optional earth fault pro-
tective functions in the well-proven technique for CT powered protection relays. As combination of a compact pro-
tection relay and related core-type transformer, the WIC1 system was especially developed for compact MV
switchboards with circuit breakers.
2.1 How to use this instruction
In this instruction the technical description of all WIC1 versions is included. The user is given a comprehensive in-
sight into the various applications, the selection, installation, setting of parameters and putting into operation of the
WIC1.
This instruction is divided into the following sections:
Chapter 1; Comments on the manual (this chapter)
Chapter 2; Introduction
Chapter 3; Handling, Installation and Outside Dimensions
Chapter 4; Operating instructions
Chapter 5; Technical Data, Characteristics and Features
Chapter 6; Commissioning and Maintenance
Chapter 7; Product-Specific Features
Chapter 8; Annex; Dimensional drawing and flag indicator, Order form and commissioning
form
OUT-OF-DATE PUBLICATION
This publication may have been revised or updated since this copy was pro-
duced. To verify that you have the latest revision, be sure to check the SEG
Electronics GmbH documentation website:
http://www.segelectronics.de
If your publication is not there, please contact your customer service representa-
tive to get the latest copy.
2.2 Introductory remarks on the WIC1
The requirements on MS distribution stations with circuit breakers call for a robust protection relay which is opti-
mized accordingly and an integral part of the respective switchboard. The WIC1 is a time over current relay SEG
Electronics GmbH has developed specifically for such requirements.
The WIC1 is a CT-powered protection relay with minimal space requirement which complies with the highest de-
mands on a digital protection device. Simple but safe wiring, high electromagnetic interference immunity, uncompli-
cated adjustment and the ability to scale to different power quantities of the switchboard, helping the switchgear
manufacturer to minimize costs. By developing the WIC1 we are also able to present a protective system with a
guaranteed maintenance-free period of 25 years, the same as for the switchboard.
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