Mining Underground Substation — High & Low Voltage Switchgear & Distribution System Project

▎Overview

This project delivers a complete high & low voltage power distribution system for a mining area substation and underground power room, including mining high-voltage switchgear, incoming/outgoing line cabinets, GZDW DC panel (with battery cabinet) and GGD low-voltage distribution cabinets. The system provides full voltage distribution, control and DC operating power, ensuring continuous, reliable supply for critical mining loads such as extraction, ventilation and drainage.

▎Requirements

Customers face the following needs and challenges in the construction of mining power distribution systems:

• Power supply continuity: Underground mining and safety loads require uninterrupted power supply, with dual circuit incoming lines and reliable segmentation.

• Environmental adaptability: The underground/mining environment is humid and dusty, and the equipment requires high protection level, pollution resistance, and corrosion resistance.

• Operational safety: High voltage interlocking, live locking, and "Beware of Electric Shock" warnings need to be improved to ensure the safety of operators.

• Control and DC power supply: An independent DC screen (GZDW) and battery cabinet are required to provide reliable DC power for the operation, protection, and signaling of the switchgear.

▎Solution

Zhejiang Shuntong Electric provides complete solutions for high and low voltage distribution systems:

• High voltage switchgear: mining type high-voltage incoming/outgoing cabinet, equipped with microcomputer comprehensive protection, simulated wiring diagram and status indication, to achieve high-voltage distribution and protection of underground substations.

• Low voltage distribution cabinet: GGD type low voltage distribution cabinet, equipped with current/voltage meter and branch control, providing distribution and control for underground low voltage loads.

• DC operation power supply: GZDW DC screen+battery cabinet, providing uninterrupted DC power supply for high-voltage switch operating mechanism, protection device and emergency lighting.

• Safety and Interlocking: The comprehensive "five prevention" interlocking, live indication, and "Beware of Electric Shock" warning signs comply with mining and industrial safety regulations.

▎Implementation

• Design selection: Based on the underground load and circuit requirements, determine the configuration scheme of high-voltage switchgear, low-voltage switchgear, and DC panel.

• Production and testing: The complete set of equipment completes factory tests such as assembly, insulation and voltage resistance, and protective transmission.

• On site installation: equipment placement, busbar/cable connection, grounding system construction, coordination with substation and underground distribution room civil engineering.

• Debugging and commissioning: Complete protection setting, interlock testing, and power transmission debugging, and deliver after confirming normal operation.

▎Value Delivered

• Improved power supply reliability: Dual circuit incoming lines and improved protection ensure continuous power supply to critical underground loads, reducing unplanned power outages.

• Enhanced operational safety: Five prevention interlocking+live locking+warning signs to reduce the risk of electric shock and misoperation.

• Optimization of operation and maintenance efficiency: The DC screen provides stable operating power supply, and microcomputer protection facilitates fault location, reducing operation and maintenance costs.

• Environmental adaptation: The high protection design adapts to the humid and dusty environment underground, extending the service life of the equipment.

▎Project Gallery