ODM Mining Transformer /Integrated Protection Transformer Companies, Company
ODM Mining Transformer /Integrated Protection Transformer Companies, Company
ODM Mining Transformer /Integrated Protection Transformer Companies, Company
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ODM Mining Transformer /Integrated Protection Transformer Companies, Company
ODM Mining Transformer /Integrated Protection Transformer Companies, Company
ODM Mining Transformer /Integrated Protection Transformer Companies, Company

ODM Mining Transformer /Integrated Protection Transformer Companies, Company

QC series mining flameproof transformers are engineered for AC 50Hz power systems, boasting a voltage rating up to 1140V and a capacity of 500VA. Serving as critical power supplies, they reliably drive control circuits, local lighting, and signal equipment within flameproof mining magnetic starters. Equipped with a robust cylindrical flameproof enclosure, integrated isolation switches, and multi-layer protection systems including short-circuit and overload safeguards, they ensure safe, stable operation in harsh coalfield environments. With Class B insulation and easy maintenance design, they deliver long-lasting performance for underground mining operations.

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Product Description

Overview

The flameproof enclosure of the integrated device is cylindrical, with a protruding base and cover. The cover and body adopt a rotary cover spigot structure. A junction box is installed on the top of the enclosure for cable incoming and outgoing. On the right side of the enclosure, there is a handle for operating the isolating switch and a test button to check the effectiveness of the short-circuit and earth leakage protection systems. A reliable mechanical interlock ensures that the cover cannot be opened when the isolating switch is closed, and the isolating switch cannot be closed when the cover is open. A transparent mirror above the cover allows observation of the status indicator lamp from outside. The connection between the main transformer and the movement adopts a terminal board, so the movement can be taken out independently during maintenance.

Functions of Main Components

1. Isolating Switch 1K
Normally used only for isolating the power supply and is not allowed to operate under load. In emergency situations, it can break the locked-rotor current of the electric drill 3 times.
2. Primary-side Fuses 1RD, 2RD
Provide short-circuit protection for the main transformer.
3. Secondary-side Fuses 3RD, 4RD
Serve as backup protection for short circuits in the 133V system.
4. Glass-tube Fuse 5RD
Protects the control transformer.
5. Thermal Relay
Provides overload protection for the electric drill.
6. AC Contactor CJ
Used to break or close the main circuit of the electric drill, with a coil voltage of 127V.
7. Main Transformer ZB
Wiring modes are Y/△ and △/△ for 1140V/133V and 660V/133V respectively, supplying 2.0KVA coalfield electric drills. It adopts Class B insulation with an allowable temperature rise of 85℃.
8. Electronic Circuit Board Plug-in
Includes electronic components for control and protection circuits. It is moisture-proof, dust-proof and easy to replace.

Product Display

Mining Transformer right
Mining Transformer Integrated Protection

Operating Environment

This transformer can operate reliably under the following conditions:

Altitude not exceeding 2500m
Ambient air temperature: maximum not exceeding 40℃, minimum not lower than -25℃
Relative air humidity: average maximum relative humidity of 90% in the wettest month
Free from severe vibration and impact
In a medium free from explosion hazard, and free from gases and conductive dust that corrode metals and damage insulation
In locations exposed to rain and snow
The waveform of the supply voltage is approximately sinusoidal

Technical Parameters

Main Transformer Power of Controlled Electric Drill Operating Value of Earth Leakage Resistance Earth Leakage Resistance Operation Short-circuit Protection Distance and Operating Time Earth Leakage Blocking Value
Rated Capacity (kW) Connection Mode Rated Voltage (V) Rated Current (A)
4.0 Y/△ 1140/133 2.02/17.4 2KW Factory Calibrated Value: 2KΩ±20% Not exceeding 0.25s Protection Distance: 0~300m
Operating Time: <0.1s		 4KΩ +20%
△/△ 660/133 3.49/17.4
6.0 Y/△ 1140/133 3.04/26
△/△ 660/133 5.25/26

Frequently Asked Questions (FAQ)

Q1: What safety feature prevents operating the device when the enclosure is open?
A reliable mechanical interlock is integrated to ensure that the enclosure cover cannot be opened when the isolating switch is closed, and conversely, the isolating switch cannot be closed while the cover is open.
Q2: How does the short-circuit protection operate during fault conditions?
The unit covers a protection distance of 0 to 300 meters with an ultrafast operating response time of less than 0.1 seconds, backed up by secondary-side fuses for the 133V system.
Q3: Can the core movement be maintained independently?
Yes, the connection between the main transformer and the movement utilizes a terminal board structure, allowing the movement to be extracted independently for inspection and maintenance.
Q4: What is the rated capacity and application for this integrated transformer?
The device is engineered with 4.0 kW or 6.0 kW rated capacities to reliably power 2.0 kW coalfield electric drills under 1140V/133V or 660V/133V operation.
Q5: What are the environmental limits for proper operation?
It operates effectively at altitudes up to 2500m, within ambient temperatures from -25℃ to +40℃, and relative air humidity averaging up to 90% in wet conditions.

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