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GKD Mine low-voltage distribution cabinet for general purposes
The general-mine low-voltage distribution cabinet type GKD is a power distribution and control device specially designed for the harsh conditions of underground mining.
Description
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Product Description
The general-mine low-voltage distribution cabinet type GKD is a power distribution and control device specially designed for the harsh conditions of underground mining. Although it does not have explosion-proof features, it meets more stringent standards for insulation, protection, mechanical strength and other parameters than conventional electrical equipment and is intended for use in underground mines that do not pose the risk of gas and coal dust explosions.
Product Overview
1. Basic definition and scope
● Nature of the equipment: Belongs to the category of “non-explosion-proof” mine electrical equipment. The nameplate is usually clearly marked “KY” (general mine design).
● Conditions of Use: Specifically designed for use in coal mines in areas where there is no risk of gas and coal dust explosions, as well as in non-coal mines and other underground industrial environments. Typically used in chambers or control rooms such as tree trunks, central control panels, main ventilation drifts.
● Main purpose: Used in three-phase AC power supply systems with a frequency of 50 Hz with a rated voltage of 380 V, 660 V or 1140 V for the conversion, distribution, control and protection of electricity for power equipment, lighting and switchgears.
2. Main technical features
To adapt to harsh operating conditions in mines - high humidity, high dust levels, vibrations - low-voltage distribution cabinets of general mine design have the following features:
● High degree of protection: The housing is usually made of cold-rolled steel or stainless steel, and is dust-proof, moisture-proof and dripping-proof. The degree of protection is usually required to be at least IP54 (up to IP65 according to some high standards), which effectively prevents the penetration of solid particles and liquids from the outside.
● Strict electrical safety requirements: There are special requirements for creepage distances and electrical clearances of terminal blocks. The housing must have reliable internal and external grounding bolts to ensure the safety of operating personnel.
● Comprehensive protective functions: Provides multi-level protection: overload, short circuit, current leakage (with blocking in case of leakage), undervoltage, overvoltage, phase loss and others. Some new models also come with smart monitoring and remote control features.
● High mechanical strength: The housing structure is designed to be resistant to shock and deformation, and can withstand certain mechanical stress and vibration.
3. Operating conditions
● Ambient temperature: Typically –5°C to +40°C.
● Relative humidity: No more than 95% (at 20°C ± 5°C).
● Altitude: Typically no more than 1000 m or 2000 m (some models up to 3500 m).
● Environmental requirements: No gases or vapors that destroy insulation, no significant shaking or vibration.
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