Electrical safety in opencast mining

Excavators

High performance with stable and reliable monitoring

Excavators

The big excavators used for open-cast mining have lots of different drives. They use both medium voltage engines and low voltage drives. The large drives, in particular, are normally supplied by ungrounded systems. These are monitored by an ISOMETER® with a coupling device. For smaller drives, we recommend monitoring with RCMS residual current monitoring systems or ISOMETER® insulation monitoring with EDS, as in both cases the faults occurring are immediately detected and reported to significantly improve availability.

Product overview ISOMETER®
Product overview Residual current monitoring
Technical paper Why the IT system is often the best choice
Technical paper Electrical safety in a modern nickel smelting plant
Technical paper Innovative shearer loader for safe and highly efficient coal mining operations
Technical paper Insulation fault location - Planning and set up in the solar charging station at the University of Applied Sciences Bingen
Technical paper Electrical safety in control and auxiliary circuits

Recommended systems for ground-fault detection (ungrounded systems):

Recommended systems for ground-fault location:

Recommended systems for ground-fault monitoring (grounded systems):

Recommended measuring current transformers:

Analyzing and reporting:

Recommended for resistance grounded systems:

EN 61557-8
Electrical safety in low voltage distribution systems up to 1 000 v a.c. and 1 500 v d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systems 

EN 61557-9

Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems

EN 61557-15

Electrical safety in low voltage distribution systems up to 1000 V ac and 1500 V dc - Equipment for testing, measuring or monitoring of protective measures - Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems

DIN VDE 0168

Errichten elektrischer Anlagen in Tagebauen, Steinbrüchen und ähnlichen Betrieben

Conveyor belts

Getting from A to B quickly but safely

Conveyor belts

Electric motors are generally employed for conveyor belts used in mining, which are driven by soft starters or frequency converters. However, these generate critical harmonic vibrations and DC currents which would normally not be present in the feeding AC system. With regular GFCI or simple insulation monitors (e.g. 3 lamp method or 2 voltmeter process), this cannot be monitored with the requisite precision. There is a need for modern monitoring equipment which can recognize and report these problems quickly. Some standards even require a quick shutdown, which can be achieved via ground-fault monitoring devices.

Product overview Residual current monitoring
Application Note EDS309x
Technical paper Innovative shearer loader for safe and highly efficient coal mining operations
Technical paper Insulation fault location - Planning and set up in the solar charging station at the University of Applied Sciences Bingen
Technical paper Electrical safety in control and auxiliary circuits

Recommended systems for ground-fault detection (ungrounded systems):

Recommended systems for ground-fault location:

Recommended systems for ground-fault monitoring (grounded systems):

Recommended measuring current transformers:

Recommended coupling devices:

Analyzing and reporting:

Recommended for resistance grounded systems:

DIN EN 50178
Electronic equipment for use in power installations

EN 61557-8

Electrical safety in low voltage distribution systems up to 1 000 v a.c. and 1 500 v d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systems 

EN 61557-9

Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems

EN 61557-15

Electrical safety in low voltage distribution systems up to 1000 V ac and 1500 V dc - Equipment for testing, measuring or monitoring of protective measures - Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems

DIN VDE 0168

Errichten elektrischer Anlagen in Tagebauen, Steinbrüchen und ähnlichen Betrieben

Heavy lorries

Heavy lorries

Heavy lorries are increasingly being powered by electric drives. Bender ground-fault monitoring devices monitor the complete electrical drive system for utility vehicles, irrespective of whether they have electric or hybrid drives (often single-wheel drive). This means they provide effective protection against electric shocks and minimize the fire risk.

Product overview ISOMETER®
Technical paper Electrical safety in control and auxiliary circuits
Technical paper A giant on its way towards the future

Recommended systems for ground-fault detection (ungrounded systems):

Analyzing and reporting:

Recommended for resistance grounded systems:

DIN EN 61851-1
Electric vehicle conductive charging system - Part 1: General requirements

DIN EN 61851-21

Electric vehicle conductive charging systems - Part 21-1: Electric vehicle onboard charger EMC requirements for conductive connection to an a.c./d.c. supply

Primary crushers, crushers

From big to small and smaller - safely

Primary crushers

Primary crushers and crushers are needed in mining to break down the stone extracted from the ground. These use very large, powerful motors which are powered by soft starters or frequency converters due to their size. The resulting harmonic vibrations and DC currents are not recognized by normal GFCIs. The use of a freely adjustable RCMA residual current monitoring system (ground-fault monitor) is therefore advisable. It guarantees fault detection. 

Product overview ISOMETER®
Product overview Residual current monitoring
Technical paper Why the IT system is often the best choice
Technical paper Innovative shearer loader for safe and highly efficient coal mining operations
Technical paper Insulation fault location - Planning and set up in the solar charging station at the University of Applied Sciences Bingen
Technical paper Electrical safety in control and auxiliary circuits

Recommended systems for ground-fault detection (ungrounded systems):

Recommended systems for ground-fault location:

Recommended systems for ground-fault monitoring (grounded systems):

Recommended measuring current transformers:

Analyzing and reporting:

Recommended for resistance grounded systems:

EN 61557-8
Electrical safety in low voltage distribution systems up to 1 000 v a.c. and 1 500 v d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systems 

EN 61557-9

Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems

EN 61557-15

Electrical safety in low voltage distribution systems up to 1000 V ac and 1500 V dc - Equipment for testing, measuring or monitoring of protective measures - Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems

DIN EN 50178

Electronic equipment for use in power installations

Main and sub-distribution boards

A safe power supply is essential

Main and sub-distribution boards

The power supply is decisively important when it comes to operating mines. The medium voltage fed in is transformed down to 400 V in the transformer stations and fed to the mine via cable bars or busbars and the low-voltage distribution boards and sub-distribution boards. Bender ISOMETER®s or RCMS residual current monitoring systems (ground-fault monitors) monitor this and ensure continuous operation. Power quality is the perfect solution for monitoring the main and the sub-distribution boards.

Produktübersicht ISOMETER®
Produktübersicht Differenzstrom
Fachbeitrag IT-Systeme – Herzstück einer zuverlässigen Stromversorgung
Fachbeitrag Warum das IT-System häufig die beste Wahl ist
Fachbeitrag Innovativer Walzenlader für den sicheren und hocheffizienten Steinkohleabbau
Fachbeitrag Isolationsfehlersuche - Projektieren und Einrichten
Fachbeitrag Elektrische Sicherheit in Steuer- und Hilfsstromkreisen

Recommended systems for ground-fault detection (ungrounded systems):

Recommended systems for ground-fault location:

Recommended systems for ground-fault monitoring (grounded systems):

Recommended measuring current transformers:

Analyzing and reporting:

Recommended for resistance grounded systems:

EN 61557-8
Electrical safety in low voltage distribution systems up to 1 000 v a.c. and 1 500 v d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systems 

EN 61557-9

Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems

EN 61557-15

Electrical safety in low voltage distribution systems up to 1000 V ac and 1500 V dc - Equipment for testing, measuring or monitoring of protective measures - Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems

DIN EN 50178

Electronic equipment for use in power installations