Electrical Power & Protection

High voltage ground fault monitor offers protection in underground mining

November 2006 Electrical Power & Protection

Over the years, Bender has remained one of the favoured suppliers of high voltage ground monitors to many well known mining switchgear suppliers. The Bender HW monitor series has been installed in mines as far afield as Poland, Russia, China and the Ukraine.

The HW 135 monitors a trailing high voltage cable in accordance with the German standard for mine safety in electrical installations, for ground fault, for open-circuit of the ground conductor, and for conducting objects penetrating the cable.

Ground fault monitoring is based on the residual current monitoring principle. The evaluation of the ground fault current is accomplished by processing the signal from the zero sequence current transformer HWW-11. The ground continuity monitoring loop is completed by means of the EV225 terminating device which is located at the load end of the trailing cable.

The HW 135 high voltage monitor can be used on cable lengths up to 3,2 km. It is ideal for monitoring supply cables without mechanical protection in underground mines and for ground fault clearing in underground mining. It can also be used for the monitoring of excavators with trailing cables, such as tunnel boring machines.

Anglo Allied Engineering is the sole agent for Bender's range of electrical protection devices for the mining industry.

For more information contact Hilda Bouwer, Anglo Allied Engineering, +27 (0) 11 766 1180, info@angloallied.co.za


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Simple acquisition of energy consumption values
November 2020, Phoenix Contact , Electrical Power & Protection
By developing the new components of the EMpro product family, Phoenix Contact has found a solution that satisfies most energy data gathering applications.

Siemens Energy turbines generate low-emission power
November 2020 , Electrical Power & Protection
Siemens Energy helps Total achieve low-emission goals for largest LNG project in Africa.

Maintaining battery backup systems
November 2020, Comtest , Electrical Power & Protection
Standby battery backup systems play a critical role in keeping essential operations functional in the event of a utility outage.

Electrical loggers for energy savings
October 2020, Comtest , Electrical Power & Protection
Fluke energy loggers deliver a complete picture to reduce energy costs and improve the bottom line.

Power supply components and services for marine applications
October 2020 , Electrical Power & Protection
Vert Energy works closely with the marine and offshore sector offering the supply of quality branded components and the support of a comprehensive repair and maintenance service.

Safety rope limit switch
September 2020, Anglo Allied Engineering , Operator Interfaces, Switches & Relays
Bernstein has introduced a new rope pull switch that provides safety for conveyor belts or machines.

Mines reduce fire hazards
August 2020 , Electrical Power & Protection
Underground mines in southern, central, and west Africa have been seeing the safety benefits of dry-type transformers from Johannesburg-based Trafo Power Solutions. According to managing director ...

RS Components stocks Eaton contactors
August 2020, RS Components SA , Electrical Power & Protection
RS Components now stocks Eaton’s complete Moeller series of compact DILMT contactors. Easy to integrate in a variety of industrial machines and systems, the contactors enable space savings of up to 40%, ...

Power supplies for building automation
June 2020, Phoenix Contact , Electrical Power & Protection
The new Step Power power supplies from Phoenix Contact are specifically tailored to the needs of modern building automation. With their comprehensive approval package, which includes the standard ...

Skid-mounted dry-type transformer
June 2020 , Electrical Power & Protection
In a specialised application on a coal mine, Trafo Power Solutions recently supplied a dry-type transformer mounted on a mobile skid. “The harsh environment of a coal mine required us to specially ...