HZ-A50 Cable Fault Location System

Introduction

The Trolley Cable Fault Location System is a comprehensive cable fault test system developed by Huazheng through long-term commitment to the field of power cable fault testing. To meet the rapid development of the power industry, combined with extensive experience and intensive research, this system highly integrates traditional independent cable fault distance measurement, an integrated high-frequency high-voltage power supply, a multiple pulse generator, an automatic discharge unit, and other independent components into a single system. The distance measurement unit is cleverly embedded, the high-voltage design is compact and safe, and the built-in unit features strong anti-interference capability.

Advantages and Features

◆ Integrated Design: The system adopts an embedded highly integrated design, offering strong anti-interference and easy, flexible mobility.

◆ Wide Applicability: Suitable for testing all types of main insulation faults of power cables at different voltage levels.

◆ Embedded Host: The fault test unit employs an embedded host with a Linux operating system.

◆ Touch Screen Control: The high-frequency high-voltage power supply unit features a touch screen control system, embodying human-computer interaction with convenient operation and a simple, intuitive display.

◆ Extended Test Line: The system is equipped with a 25 m test line, facilitating cable fault testing for long and short distances in complex environments.

◆ European Standard Design: The entire system is designed according to European standards and includes an authority key for professional use.

◆ Ground Loop Monitoring: The system has a ground loop monitoring protection system to ensure equipment and personal safety in real time.

Test Capabilities:

Fault types: open circuit, short circuit, low resistance, high resistance leakage, high resistance flashover

Test methods: low-voltage pulse, high-voltage flash, multiple pulse

Test distance: 5 m – 100 km

Blind zone: 5 m

Pinpointing error: ±0.2 m

System error: < ±1%

Hardware:

Display: 12.1" industrial LCD (Linux)

Storage: 32 GB

Languages: Chinese, English, Russian

Operation: touch screen + photoelectric knob

Sampling frequencies: 3.125–400 MHz (8 options)

Power: AC 220V (≤15W) / DC 12V (≤20W); 6-hour standby

HV Power Supply Unit:

Output: ≤32 kV (negative), ≤10 A

Modes: single pulse, continuous pulse, DC output

Built-in capacitance: 4 μF / 32 kV

Discharge energy: ≤2048 J

Pinpointing Unit:

Sensor dynamic range: >104 dB (acoustic), >110 dB (magnetic)

Frequency range: 100–1500 Hz

Multiple filtering modes

320×240 true color screen

Testing Steps For Power Cable Faults

I.Analyze the nature of the cable fault, understand the type of faulty cable

II.Use the low-voltage pulse method of the cable tester to test the cable length and calibrate the cable's radio wave transmission speed.

III.Select the appropriate test method and use the cable tester to perform a rough measurement of the cable fault

IV. Use a path meter to detect the direction of the buried cable

V. Use a fixed-point meter to accurately locate the fault point

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