Mining transformer

KS9-M, KS11 Mining Transformers

Our company's developed and produced series of full-sealed oil-immersed mining power transformers, including KS9-M and KS11-M models, boast low losses, low noise, and high efficiency. They are used to alter the size of AC voltage and are suitable for mines with explosive hazards such as mixed gases and coal dust. They convert 6KV, 10KV power sources into the low-voltage power required in coal mine shafts at 400 (380), 693 (660), 1200 (1140), and 3450 (3300) V. The transformer housing for mining use features full corrugated design with side and top hinged covers, offering high mechanical strength, low temperature rise, and excellent heat dissipation. The core is made of low-loss silicon steel sheets, resulting in low no-load losses, low no-load current, and low noise. Using H-class insulation materials and advanced insulation structure, they have good thermal stability and can operate continuously at full load under high temperatures. The general-type mining transformer has a robust structure and a low-profile design. There is no oil storage tank on the top of the transformer, and sufficient space is left on the oil surface within the tank to prevent excessive pressure buildup inside the tank when the vent holes on the cover become blocked.

Installation Location: Used in coal dust-filled mines without explosive hazards, for power and lighting supply. This transformer is oil-immersed. Its internal structure and working principle are the same as those of a standard oil-immersed power transformer. The main difference lies in the casing and the incoming/outgoing line arrangement.

Used in places with explosive hazards in mines. This transformer is made in dry type, with its input and output lines led out through conduit sleeves. Transformers of explosion-proof type with a capacity above 100 kVA are often combined with explosion-proof switchboxes to form explosion-proof integrated mobile substation sets. To accommodate tunnel transportation, the transformer structure must have a low height. As a result, the iron column diameter can be slightly larger.,Generally, cold-rolled silicon steel sheets are used.100Kilovolt-amps and above are typically...HHigh-grade insulation.

Structural Features

All junction surfaces of the box shell are made to explosion-proof specifications, capable of withstanding0.8Internal pressure in megapascals.

◆The lid is made of steel plate, with two cable outlet sleeves on the shell. A rubber gasket is placed under the wind-facing sleeve. The cable passes through the rubber gasket, and after the sleeve is tightened, the rubber gasket presses the cable to ensure a seal. The selected cable outer diameter must fit tightly with the rubber gasket to ensure the cable is completely sealed, thereby guaranteeing the isolation performance.

Inside the housing, there are bolts for grounding, and grounding bolts are also welded to the housing bracket, all of which should be properly grounded.

The outer shell is welded with a trailer, allowing for easy movement in a horizontal position. It can be stored vertically during transportation or storage to save space.

◆ Core with grain-oriented low-loss cold-rolled silicon steel sheet and采用BLevel insulation multi-layer cylindrical coil structure, air-cooled mine interior installation.

Disconnect the transformer from the power source before reconnecting. Open the box lid and perform the wiring on the transformer body.

Its standard output voltage is 12V.24v、36v、127v、220v、380v、400v、660v、690vAnd1140v,To meet the requirements of power equipment in mining operations.

Key Technical Parameters 

■ Cautionary Notes 

Prior to purchase, estimate the total electrical capacity of the appliances you will be using and select a transformer with sufficient capacity to ensure it does not burn out during instant startup. 

◆This transformer is strictly designed and manufactured according to national standards. Before using a transformer with multiple windings (multiple control voltages), the capacity should be increased proportionally based on the voltage ratio to prevent the transformer from being damaged. 

Before installation, carefully check that the data listed on the label meets your requirements. Only proceed with installation and use after confirming that everything is correct. 

Application Range:

     KSG-2.5、4.0/0.66Type-Mining Explosion-Proof Dry-Type Transformer (hereinafter simply referred to as the transformer) is suitable for coal mine underground areas with coal dust explosion hazards. In AC50Hz/Voltage up to660Vof the power supply lines/Supplies for coal electrical drilling127VPower supply.

Transformers in compliance with GB3836.1-83 General Requirements for Explosion-Proof Electrical Equipment Used in Explosive EnvironmentsGB3836.2-83Explosion-proof electrical equipment for explosive environments - Flameproof electrical equipmentd"related standards such as "》" and the like."

The casing of the KSG type explosion-proof transformer for mining is made of steel plate welding, which can withstand8A liquid pressure test at a certain atmospheric pressure; the contact surface between the box cover and the box rim meets the explosion-proof requirements; the box cover is made of steel plate, equipped with two cable outlet sleeves. The inner surface of the outlet sleeves is lined with rubber gaskets, through which the cables pass. After tightening the outlet sleeve, the rubber gasket ensures a tight seal on the cable. The selected cable outer diameter must fit the rubber gasket closely to ensure the cable is securely pressed and completely sealed, guaranteeing the protective performance.KSGHigh-voltage coil of a mine-proof transformer, which can be connected in a star configuration or a delta configuration. The corresponding power supply voltages are:380And220V, or400Please provide the Chinese content to be translated.230V(Refer to label data). When reconnecting, disconnect the transformer from the power source, open the cover, and perform the wiring on the body terminal board.