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SMARTE Messtechnik für Gleichstrom – Spannung – Kabel – Isolation

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WITT CM 3 KFM 200 Cabel monitoring

Detection and reporting of imperfections in cables

SKU: 00000280 Category: Cable monitoring Tag: cable fault
  • Description

Description

Application

The WITT CM 3 is a self-resetting cable monitoring device for the detection of cable faults. A delay of 4.8 seconds is integrated between the signal and the triggering.

Description

The device is used to monitor the insulation of cable systems in DC systems. It works without auxiliary voltages. The connection is made between the insulating outer jacket and a reference earth. Two potential-free changeover contacts are available for the message. The device is built into a plastic housing that can be mounted on a DIN rail.

Function

The voltage between the cable jacket and earth is taken off via a rectifier. As soon as this voltage rises above an adjustable threshold, the signal relay responds. The circuit works according to the constant current principle, i.e. even if the voltage rises to 1000 V or more, the current requirement does not increase any further. The leakage current that flows to earth is very low at 2 mA; the current load only increases to 6 mA in the event of a fault. The switching status is displayed locally via a signal lamp.

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WITT Solutions GmbH

Dyrotzer Ring 3

14641 Wustermark bei Berlin
Germany

Tel. +49 33234 243 30
Fax +49 33234 243 302

 

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