Mine underground explosion-proof power distribution system solution

Detailed plan description

For underground scenarios in coal mines and metal mines, we provide a complete set of power distribution equipment and system solutions that comply with mining explosion-proof standards, covering mining working surfaces, ventilation systems, drainage systems, and transportation systems. All equipment has the MA mining safety mark, uses explosion-proof and explosion-proof design, and is suitable for harsh underground environments that are humid, dusty, and have the risk of gas/dust explosions.

Adapted to Indonesia

Solve the problems of "underground safety, explosion-proof, moisture-proof, remote monitoring, and high shutdown losses" for mine owners and mining contractors. The solution covers explosion-proof switches, mobile substations, leakage/grounding protection, local fan/water pump control, communication monitoring and spare parts guarantee.

Professional specifications and standards based

The underground power supply needs to be selected according to the actual level of 660V/1140V/3.3kV used in the mine. Key equipment should meet Ex d/Ex e or the explosion-proof type required by the project. The cabinet IP54/IP65, protection includes leakage, short circuit, overload, undervoltage, gas/temperature interlocking. Refer to IEC 60079, IEC 61439, IEC 60204, IEC 60529 and local mine safety regulations.

Product specification comparison table

Original experience and test data

Scarce experience: Mining projects are most afraid of misoperation of protection and slow fault location.

Pitfalls and pain points that I have stepped on

• The risk of underground gas and coal dust explosions is high, and ordinary equipment can easily cause safety accidents;
• The underground space is narrow, humid and full of water, and the equipment is easily damaged by moisture, making troubleshooting difficult;
• The underground power supply distance is long, the voltage drop is large, and the terminal equipment cannot operate normally;
• The power supply system is not monitored and faults cannot be detected in time, which can easily lead to secondary accidents.

Core parameters

The equipment explosion-proof level is Exd I Mb, the voltage level is 6kV/10kV/1140V/660V/380V, the protection level is IP54 or above, and it has four levels of protection against leakage, overload, short circuit and undervoltage.

Our special contribution

• A full range of mining explosion-proof equipment, all with MA certification, fully comply with mining safety regulations;
• Moisture-proof and explosion-proof integrated design enables stable operation in harsh underground environments and reduces the failure rate by 80%;
• Accurate voltage drop calculation, reasonable configuration of transformer and cable cross-section, and stable terminal voltage;
• Underground power supply monitoring system, ground remote monitoring, automatic fault alarm, improve safety management level.

Project income

• Safety benefits: Fully explosion-proof and compliant equipment, the risk of gas and dust explosion is reduced to 0, eliminating major safety production accidents and meeting the requirements of mine safety supervision.
• Economic benefits: Equipment failure rate is reduced by 80%, and average annual maintenance costs are reduced by 70%; faults are remotely located, and downhole troubleshooting time is shortened from hours to 30 minutes, reducing production shutdown losses.
• Management benefits: The ground remotely monitors the status of underground power supply, reducing the number of inspections downhole, reducing operation and maintenance labor costs by 50%, and reducing the safety risks of personnel going downhole.