Mining cable fault detectorIt is a high safety and high reliability specialized equipment designed for power cable fault location and diagnosis in complex underground environments such as coal mines and metal mines. Due to the characteristics of narrow space, high humidity, flammability and explosiveness, and strong electromagnetic interference in the mining environment, cables are prone to short circuits, open circuits, grounding or flashover during long-term operation due to mechanical damage, insulation aging, loose joints or rodent damage, seriously affecting safety production. The mining cable fault detector can quickly and accurately identify the type of fault and accurately locate the fault point without power outage or power outage, greatly reducing the repair time and ensuring the continuity of mine power supply and operational safety.

　　Mining cable fault detectorIts main components are as follows:

1、 Host control unit (core part)

Embedded industrial control system: run dedicated fault diagnosis software;

Color LCD display screen: real-time display of waveforms, data, and operation menus;

Intrinsic safety operation panel: equipped with physical buttons or touch screen (compliant with Ex ib explosion-proof requirements);

Data storage and communication module: Supports exporting waveforms and reports via USB, Bluetooth, 4G/WiFi (ground end).

2、 Low voltage pulse testing module (TDR time domain reflectometry method)

Pulse generator: emits nanosecond level low-voltage electrical pulses (usually 5-30V);

High speed sampling circuit: captures reflected signals for locating broken wires, low resistance short circuits, and joint positions;

Wave speed setting function: It can preset the wave propagation speed for different cable types (such as rubber sleeves and armor).

3、 High voltage generator module (for high resistance/flashover faults)

DC high voltage power supply: outputting adjustable DC voltage from 0 to 32 kV, used for breaking through high resistance grounding faults;

Impact high-voltage unit (ball gap or electronic switch): generates instantaneous high-voltage pulses, triggering flashover fault discharge;

Safety protection circuit: equipped with overcurrent, overvoltage, short circuit, and automatic discharge functions;

High voltage indication and interlocking device: Ensure safe operation and prevent accidental contact.

4、 Acoustic magnetic synchronous fixed-point probe (for precise positioning)

Acoustic sensor: picking up mechanical vibration sound waves generated by discharge at the fault point;

Electromagnetic sensor: synchronously receiving transient electromagnetic field signals generated by discharge;

Headphones/audio output: Operators determine the location of the fault point based on the strength of the sound;

Signal strength indicator light or digital display: assists in precise positioning (error can be<0.2 m).

5、 Insulation resistance testing module (with megohmmeter function)

Built in digital megohmmeter, capable of outputting 500 V, 1000 V, 2500 V DC;

Quickly measure the insulation resistance values between cable phases and relative to ground (in the range of M Ω to G Ω);

Determine the overall aging or moisture level of the cable.

6、 Power system

Intrinsic safety lithium battery pack: large capacity (such as 20 Ah), supporting 6-12 hours of continuous operation;

Charging management circuit: equipped with overcharge, overdischarge, and short circuit protection;

Underground dedicated charging interface: compliant with mining safety regulations;

Battery level display: Real time monitoring of remaining battery level.

7、 Connection and attachments

High voltage test line: with shielding, withstand voltage ≥ 35 kV, equipped with mining quick plug;

Low voltage test clip/probe: used to connect cable cores;

Grounding wire: Ensure reliable connection between the equipment and the ground;

Portable backpack or explosion-proof toolbox: easy to carry and protect underground.

8、 Safety and protective structures

Explosion proof/intrinsic safety enclosure: made of high-strength engineering plastic or aluminum alloy, complying with Ex d [ib] I Mb or Ex ib I Mb explosion-proof certification;

IP65/IP66 protection level: dustproof, waterproof, and drop resistant;

Emergency stop button: Quickly cut off high-voltage output in case of emergency.