Table of Contents

Product Introduction

Coal mines consume large quantities of cables. Harsh underground conditions lead to frequent cable damage. To cut costs, most mines maintain in-house cable repair teams. Limited by testing equipment and technologies, fault detection for mining cables often yields unsatisfactory results; traditional heavy impulse methods cause severe damage to cable insulation.

This mining cable fault detector adopts the partial discharge method without destroying the original cable structure. It accurately locates cable damaged sections and supports post-repair testing. It is a reliable instrument for coal mine cable maintenance.

Alternative Names: Mining Cable Fault Tester, Mining Cable Fault Detector, Mining Cable Fault Locator, Cable Break Detector

Technical Parameters

Parameter Item	Specification
Input Power	Single-phase AC 220V, 50Hz
DC Output Voltage for Fault Detection	0–30KV (button control)
Fault Location Accuracy	Within ±50 mm
DC Test Output Voltage	0–30KV (button control)
Automatic Withstand Voltage Test Duration	0–30 min (adjustable)
Leakage Current Measuring Range	0–100 μA
Rated Capacity of Main Transformer	3KVA
Rectification Mode	Single-phase half-wave
Discharge Ball Gap	Adjustable via handle screw rod
Overall Dimensions	900×850×1200mm (W×D×H)

Product Features

Consists of control unit (low voltage), high-voltage rectifier, discharge and test section. Sufficient safety clearance is reserved between low/high voltage circuits and enclosure.
High-voltage startup requires dedicated key operation to protect equipment and personnel safety.
Voltage rises gradually starting from zero during detection and testing. Equipped with high/low voltage limit protection. Boost and buck are controlled by buttons with stable speed for safe and convenient operation.
DC withstand voltage test time can run automatically by timer or manual control for precise and reliable testing duration.
Leakage current can be measured on demand during voltage withstand tests.
Built-in overcurrent and short-circuit protection, with startup alarm and overcurrent protection functions.
Control panel includes power switch, high-voltage start/stop, boost/buck buttons and timer relay for withstand voltage duration setting.
Display panel monitors high voltage, leakage current and low-voltage total current; fitted with indicator lights for power, high voltage and timing, plus an observation window for ball gap discharge.
Supplied with dedicated high-voltage discharge rod for discharging after each test to guarantee safety. Ground terminal is marked at the bottom of the cabinet.

FAQ for Mining Cable Fault Detector

Q1: What is the Mining Cable Fault Detector used for?

A: It locates damaged sections of underground mining cables based on partial discharge technology and performs DC withstand voltage tests after cable maintenance.

Q2: What advantages does partial discharge detection have over traditional impulse methods?

A: It avoids heavy impulse voltage that damages cable insulation. It can detect faults without destroying the original cable structure.

Q3: What is the positioning accuracy of the instrument?

A: The fault location accuracy is within ±50 mm, enabling precise finding of cable damage points.

Q4: What is the maximum DC output voltage?

A: Both fault detection and DC test output reach 0–30KV, controlled by operation buttons.

Q5: Can I set the withstand voltage test time freely?

A: Yes, the automatic withstand voltage time ranges from 0 to 30 minutes and can be adjusted according to test requirements.

Q6: Does the device have safety protection functions?

A: It is equipped with overcurrent protection, short-circuit protection, high/low voltage limit protection and dedicated discharge rod to ensure operational safety.

Q7: Is high voltage directly accessible after startup?

A: No. High voltage startup requires a dedicated key; voltage rises slowly from zero to prevent sudden voltage impact.

Q8: What is the leakage current measuring range?

A: The leakage current measuring range is 0–100 μA to monitor cable insulation status during testing.

Q9: What power supply does the equipment adopt?

A: Input power is single-phase AC 220V, 50Hz, main transformer rated capacity 3KVA.

Q10: What should be done after completing each test?

A: Use the matching high-voltage discharge rod to discharge the equipment. Confirm ground connection is reliable before subsequent operation.

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