Product Overview

Mining switchgear is a high-performance, high-safety core power distribution product designed for various global mines and explosive hazardous environments. The equipment strictly complies with mainstream international explosion-proof standards such as IECEx and ATEX. It features a modular construction, integrating intelligent monitoring and multiple electrical protection functions, and is suitable for fixed high- and low-voltage power distribution applications. Its core mission is to provide 24/7 safe and reliable power supply for production machinery, conveying systems, ventilation and drainage, and intelligent monitoring networks in hazardous areas with flammable and explosive gases or dust (e.g., Zone 1/21), such as coal mines and metal mines. It is a key component in building modern, intrinsically safe mining power supply systems.

Our Project Delivery Process

From factory assembly to on-site commissioning, we provide a complete power distribution solution for mining projects:

1. Factory Assembly & Routine Testing - Each switchgear unit is assembled and routine-tested in our factory before shipment.

2. Prefabricated Delivery - Containerized and modular units are prepared for fast, low-civil-work installation at remote mining sites.

3. On-Site Installation & Commissioning - From transformer placement to switchgear commissioning, our team supports full on-site delivery.

4. Integrated Project Handover - Prefabricated buildings, switchgear, and transformers are delivered as one integrated package for open-pit and underground mines.

Technical Specifications

Parameter	Description
Rated Voltage Range	Low to medium voltage, covering conventional mining power distribution requirements
Current Capability	Up to several thousand amperes depending on configuration
Breaking Capacity	High-breaking design to withstand severe short-circuit conditions
Degree of Protection (IP Code)	IP55 / IP65 or higher
Explosion-Proof Certification	Compliant with international standards such as IECEx and ATEX
Applicable Standards	IEC 60079 (Explosive atmospheres), IEC 62271 (High-voltage switchgear and controlgear), IEC 61439 (Low-voltage switchgear and controlgear assemblies), IEC 60529 (Degrees of protection provided by enclosures)

"Note: For mining projects in certain regions (e.g., Latin America), ANSI/NEMA standards (such as ANSI C37.20.2 / IEEE C37.20.7) may also apply for arc-resistant switchgear. Please specify standard preference when inquiring."

Key Features

1. International Compliance

Design and manufacturing fully comply with international explosion-proof and electrical safety standards, meeting global market access requirements.

2. Safety & Reliability

Equipped with multiple electrical and mechanical interlocks, providing overload, short-circuit, earth fault, and leakage protection to ensure operational and running safety.

3. Flexibility & Intelligence

Modular draw-out construction allows flexible configuration. Optional intelligent communication interfaces (supporting Modbus, Profinet, etc.) enable remote monitoring and energy management.

4. Environmental Adaptability

Suitable for harsh environments with explosive gases or dust, widely used in global mines, tunnels, chemical plants, and other hazardous areas.

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Project Experience - Trust In Grid Co., Ltd.

Trust In Grid has delivered reliable power solutions for mining and industrial projects worldwide. Our recent projects include a 110kV remote hydroelectric substation in rugged U.S. canyon terrain above 2,800 feet, a regional high-voltage transmission and distribution upgrade in the USA, and a 20MVA emergency power transformer delivered to a European port. These projects demonstrate our capability to engineer, manufacture, and commission equipment for harsh environments - from high-altitude deserts to remote open-pit mines. For mining applications, we provide containerized and modular switchgear solutions tailored to site conditions.

Scope of Application

Reliable power distribution for mining operations - Engineered for continuous duty in harsh environments.

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Suitable for fixed high- and low-voltage power distribution applications worldwide requiring a high level of explosion-proof protection, including underground coal mines, metal mines, chemical plants, tunnel engineering, and other industrial sites with potentially explosive atmospheres.

Surface mining application - Designed for dusty, high-vibration open-pit environments.

Mining & Industrial Applications

1. Underground Mining Application

Underground mining application - Engineered for confined spaces and hazardous atmospheres, providing safe power distribution for coal mines and metal mines.
Surface mining application - Designed for dusty, high-vibration open-pit environments.
2. Tunnel & Infrastructure Application

Tunnel & infrastructure application - Reliable power supply for tunnel engineering, chemical plants, and critical industrial sites with explosive gas or dust hazards.

Available in both stationary configurations (for surface mining substations) and mobile/skid-mounted options (for open-pit operations requiring relocation). Underground variants are engineered for compact footprint and restricted ventilation conditions.

Transformer Inquiry Parameter Confirmation

To provide an accurate quotation, please confirm the following transformer parameters.

If information is incomplete, we can only provide a rough estimate, not a formal quotation. Please fill in the items or provide a technical specification, and we will calculate item by item and reply with a formal quotation.

No.	Parameter to Confirm	Information Required	Why It Affects Price
1	Operating Environment	Coal mine/non-coal mine, underground/surface, gas or coal dust	Determines certification type and structural cost
2	Certification	MA/KA, ExdI, KY, IEC, or other	Without clear certification, compliant quotation is impossible
3	Transformer Type	Dry-type/oil-immersed, mining/standard, flameproof/general	Different types vary greatly in price
4	Rated Capacity	kVA	Determines body cost and dimensions
5	Voltage Level	Primary/secondary voltage	Determines ratio and insulation level
6	Frequency/Phase	50Hz/60Hz, three-phase/single-phase	Affects selection and export compliance
7	Vector Group	Dyn11, Yyn0, etc.	Affects winding design and parallel operation
8	Impedance Voltage	%	Affects short-circuit current and protection coordination
9	Cooling Method	AN/AF, ONAN/ONAF, etc.	Affects temperature rise and cooling cost
10	Temperature Rise / Insulation Class	F/H, etc.	Affects material cost and lifespan
11	IP Degree	IP20/IP23/IP54, etc.	Affects enclosure and installation
12	Enclosure Included	Yes/No, material, color, dimensions	Enclosure is often omitted; affects total price
13	Temperature Controller / Fan	Included or not, alarm	Affects secondary component cost
14	Busbar / Connection	Busbar, flexible connection, cable terminal included or not	Affects interface and accessory cost
15	Neutral Point	Drawn out or not, grounded or not	Affects system wiring scheme
16	Installation Environment	Altitude, temperature, humidity, corrosion, water spray	Special environment requires special design
17	Scope of Supply	Transportation, commissioning, testing, installation, spares	Affects quotation scope
18	Applicable Standard	GB/IEC/customer specification	Affects design and acceptance
19	Delivery / Warranty	Production cycle, warranty, response time	Affects scheduling and after-sales cost
20	Quotation Validity	Copper and silicon steel price fluctuation	Affects price validity

Inquiry Notes:
Please provide the single-line diagram, technical specification, certification requirements, and scope of supply along with the parameter confirmation table. Quotations do not include civil works, foundations, on-site lifting, external cables, or special certification costs by default. If transportation, commissioning, installation, or spare parts are required, please specify in the inquiry. Different certifications (IECEx, ATEX, MA/KA, ANSI/NEMA, etc.) and standards are not interchangeable; changes require re-quotation. Quotation validity is usually 15–30 days. If copper or silicon steel prices fluctuate significantly, the written validity shall prevail. If information is incomplete, we can only provide a rough estimate, which shall not be used as a formal quotation or contract basis.

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