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Electrical safety in opencast mining

Excavators

High performance with stable and reliable monitoring

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 unearthed 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.

 

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Conveyor belts

Getting from A to B quickly but safely

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 RCD 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 recognise and report these problems quickly. Some standards even require a quick shutdown, which can be achieved via insulation monitoring devices.

 

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Heavy lorries

Heavy lorries are increasingly being powered by electric drives. Bender insulation 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 minimise the fire risk.

 

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Primary crushers, crushers

From big to small and smaller - safely

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 converter due to their size. The resulting harmonic vibrations and DC currents are not recognised by normal RCDs. The use of a freely adjustable RCMA residual current monitoring system is therefore advisable. It guarantees fault detection.

 

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Main and sub-distribution boards

A safe power supply is essential

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 monitor this and ensure continuous operation. Power quality is the perfect solution for monitoring the main and the sub-distribution boards.

 

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Downloads

NameCategorySizeLanguageTimestampD-/B-Number
Product Overview ISOMETER®/ISOSCAN® Product Overviews 5.3 MB EN2024/02/1616.02.2024
Product Overview - Residual Current Monitoring Product Overviews 6.2 MB EN2023/11/0909.11.2023
Fachbeitrag: Isolationsfehlersuche - Projektieren und Einrichten Technical article 117.5 KB DE2019/05/1313.05.2019
EDS309x Application note 1.4 MB EN2019/05/1313.05.2019D00012
Insulation Fault Location - Planning and Setup Technical article 112.4 KB EN2019/05/1313.05.2019
Electrical Safety in Control and Auxiliary Circuits Technical article 632.6 KB EN2019/05/1313.05.2019
Why the IT System is Often the Best Choice for Power Supply Systems of All Types Technical article 3.0 MB EN2019/07/1111.07.2019
Electrical Safety in a Modern Nickel Smelting Plant Technical article 358.8 KB EN2019/05/1313.05.2019
Innovative Shearer Loader for Safe and Highly Efficient Coal Mining Operations Technical article 222.7 KB EN2019/05/1313.05.2019

Products

Insulation monitoring

ISOMETER® iso685…
ISOMETER® iso685…

Insulation monitoring device for inverter applications and large industrial plants

ISOMETER® IR155-3203 / IR155-3204
ISOMETER® IR155-3203/IR155-3204

Insulation monitoring device for unearthed DC drive systems in electric vehicles

ISOMETER® IR155-4203/IR155-4204
ISOMETER® IR155-4203/IR155-4204

Insulation monitoring device for unearthed DC drive systems in electric vehicles

Insulation fault location

ISOSCAN® EDS460-D
ISOSCAN® EDS460-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

ISOSCAN® EDS30…
ISOSCAN® EDS30…

Portable insulation fault location systems for unearthed and earthed systems (IT and TN systems)

Residual current monitoring

LINETRAXX® SmartDetect RCMS410

Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems

LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

LINETRAXX® RCMS460-L
LINETRAXX® RCMS460-L

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

LINETRAXX® RCMS490-L
LINETRAXX® RCMS490-L

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Current transformers

LINETRAXX® CTUB100 series

AC/DC sensitive measuring current transformer (Type B)

Communication

COMTRAXX® CP9xx-I Serie
COMTRAXX® CP9…-I series

Condition monitor with display and an integrated gateway

Powerscout
POWERSCOUT®

Recognising connections – optimising maintenance

Neutral Grounding Resistance (NGR) Monitoring

LINETRAXX® NGRM700

The advanced Neutral Grounding Resistor Monitor for sophisticated applications

Power Quality

LINETRAXX® PEM353

Universal measuring device with numerous measured quantities, energy and power measurement with storage, Power Quality Monitoring, limit value monitoring with alarm forwarding

System components

AGH150W-4
AGH150…

Extension of the nominal voltage range of ISOMETER® iso685 series to AC 0...1150 V, DC 0...1760 V

AGH204S-4
AGH204S-4

Extension of the nominal voltage range of ISOMETER® iso685 series to AC, 3(N)AC 0...1650/0...1300 V

AGH520S
AGH520S

Extension of the nominal voltage range of ISOMETER® to AC 0...7200 V

AGH675S-7/AGH675S-7MV15
AGH675S-7…

The coupling device AGH675S-7/AGH675S-7MV15 is designed to extend the nominal voltage range of the ISOMETER® IRDH275BM-7 to AC/DC 0…15.5 kV.

AGH676S-4
AGH676S-4

Extension of the nominal voltage range of ISOMETER® iso685.../IR420-D64 series to AC 0...12 kV

Insulation monitoring

ISOMETER® iso685…
ISOMETER® iso685…

Insulation monitoring device for inverter applications and large industrial plants

Details
ISOMETER® IR155-3203 / IR155-3204
ISOMETER® IR155-3203/IR155-3204

Insulation monitoring device for unearthed DC drive systems in electric vehicles

Details
ISOMETER® IR155-4203/IR155-4204
ISOMETER® IR155-4203/IR155-4204

Insulation monitoring device for unearthed DC drive systems in electric vehicles

Details

Insulation fault location

ISOSCAN® EDS460-D
ISOSCAN® EDS460-D

- This device series is in the discontinuation phase. -
Deliverable according to availability until 01.01.2025.

Details
ISOSCAN® EDS30…
ISOSCAN® EDS30…

Portable insulation fault location systems for unearthed and earthed systems (IT and TN systems)

Details

Residual current monitoring

LINETRAXX® SmartDetect RCMS410

Four-channel DC, AC and pulse current sensitive residual current monitor for earthed AC, AC/DC and DC systems

Details
LINETRAXX® RCMS460-D
LINETRAXX® RCMS460-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

Details
LINETRAXX® RCMS460-L
LINETRAXX® RCMS460-L

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor

Details
LINETRAXX® RCMS490-D
LINETRAXX® RCMS490-D

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Details
LINETRAXX® RCMS490-L
LINETRAXX® RCMS490-L

Multichannel AC, pulsed DC and AC/DC sensitive residual current monitor with one alarm contact per channel

Details

Current transformers

LINETRAXX® CTUB100 series

AC/DC sensitive measuring current transformer (Type B)

Details

Communication

COMTRAXX® CP9xx-I Serie
COMTRAXX® CP9…-I series

Condition monitor with display and an integrated gateway

Details
Powerscout
POWERSCOUT®

Recognising connections – optimising maintenance

Details

Neutral Grounding Resistance (NGR) Monitoring

LINETRAXX® NGRM700

The advanced Neutral Grounding Resistor Monitor for sophisticated applications

Details

Power Quality

LINETRAXX® PEM353

Universal measuring device with numerous measured quantities, energy and power measurement with storage, Power Quality Monitoring, limit value monitoring with alarm forwarding

Details

System components

AGH150W-4
AGH150…

Extension of the nominal voltage range of ISOMETER® iso685 series to AC 0...1150 V, DC 0...1760 V

Details
AGH204S-4
AGH204S-4

Extension of the nominal voltage range of ISOMETER® iso685 series to AC, 3(N)AC 0...1650/0...1300 V

Details
AGH520S
AGH520S

Extension of the nominal voltage range of ISOMETER® to AC 0...7200 V

Details
AGH675S-7/AGH675S-7MV15
AGH675S-7…

The coupling device AGH675S-7/AGH675S-7MV15 is designed to extend the nominal voltage range of the ISOMETER® IRDH275BM-7 to AC/DC 0…15.5 kV.

Details
AGH676S-4
AGH676S-4

Extension of the nominal voltage range of ISOMETER® iso685.../IR420-D64 series to AC 0...12 kV

Details

Standards

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

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