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The XHGG502, XHHV535-2L and XHDD503C portable cable fault locating system is a complete three-unit field solution for locating faults on buried power cables rated 35kV and below. The XHGG502 TDR pre-locator with 400MHz sampling and 68km ranging capacity measures the approximate fault distance, the XHHV535-2L surge generator with up to 1225J discharge energy injects high-energy impulses to break down the fault point, and the XHDD503C acoustic-magnetic pinpointer with 0.1m positioning accuracy precisely identifies the fault position. Together they cover the entire workflow from fault ranging to precise pinpointing, shortening outage time and minimizing excavation area for repair crews.
Applications & Target Audience: Engineered for hospital and large public facility electrical maintenance teams, city gas and heating network operating companies, sewage treatment plant and pumping station electrical maintenance units, broadcast and telecommunication tower site infrastructure teams and high-speed railway station and integrated transport hub electrical departments that locate low-resistance, open-circuit, disconnection, high-resistance leakage and flashover faults on buried power cables rated 35kV and below.
Industrial-grade 12.1-inch touchscreen all-in-one computer adopting the world's most advanced multi-pulse (eight pulse) method together with high-voltage flashover and low-voltage pulse methods. Any high-resistance fault presents the simplest waveform characteristics similar to a low-voltage pulse short-circuit fault, making waveform interpretation extremely easy. The included pulse coupler withstands DC 35kV, extending reliable testing to medium-voltage cables.
Sampling Frequency: 400MHz
Ranging Range: ≥68km, minimum resolution 0.1m
Pulse Coupler: DC 35kV withstand voltage
Test Methods: LV pulse, HV flashover, multi-pulse method
2. XHHV535-2L — 35kV High Voltage Surge Generator
Impulse Energy Injection
Portable high-voltage surge generator integrating a DC high-voltage source, energy storage capacitor and discharge ball gap. It delivers 0-35kV impulse voltage with up to 1225J discharge energy to break down and flash over cable fault points, enabling acoustic and magnetic synchronized fault point determination. The ultra-light design under 25kg completely replaces traditional test transformers and operation boxes weighing hundreds of kilograms.
Upgraded acoustic-magnetic synchronous pinpointer with 0.1m positioning accuracy. The 5-inch touch high-brightness LCD remains clearly visible under sunlight. It automatically calculates the acoustic-magnetic time difference, features background noise reduction (BNR) and mute noise reduction functions, and provides path deviation indication. The probe adopts multi-layer physically isolated sensors with IP65 waterproof rating, and both acoustic and magnetic gains are independently adjustable in 8 levels to adapt to various site conditions.
Fault Nature JudgmentUse an insulation resistance meter or multimeter to confirm the fault type, classifying it as low-resistance, open-circuit, high-resistance leakage or flashover fault.
Fault Pre-Location (XHGG502)Connect the pre-locator and apply low-voltage pulse, high-voltage flashover or multi-pulse method to measure the approximate fault distance with 400MHz sampling and up to 68km range.
Cable Route TracingUse the XHDD503C path identification mode with path deviation indication to trace the exact cable route and mark the path on the ground surface.
Surge Impulse Injection (XHHV535-2L)Apply high-energy 0-35kV surge impulses with up to 1225J discharge energy to break down the fault point and generate detectable acoustic and electromagnetic signals.
Precise Pinpointing (XHDD503C)Walk the cable route with the pinpointer; the BNR noise reduction filters out ambient noise, and the point with the smallest acoustic-magnetic time difference is the exact fault location.
Cable Repair and VerificationExcavate precisely at the marked point, repair the cable and verify restoration with a final insulation test.
Key Advantages
0.1m Ultra-High Pinpointing Accuracy: The upgraded XHDD503C pinpointer delivers centimeter-level positioning with automatic acoustic-magnetic time difference calculation, far exceeding conventional acoustic-only methods.
BNR Background Noise Reduction: Effectively filters ambient noise in noisy urban, plant and roadside environments, making faint discharge signals at deep fault points clearly audible.
Simplest High-Resistance Fault Interpretation: The multi-pulse method presents any high-resistance fault as a simple low-voltage pulse short-circuit waveform, dramatically reducing operator skill requirements.
35kV Medium-Voltage Coverage: The 35kV pulse coupler and 0-35kV surge generator cover the most common urban distribution network voltage levels.
Complete Field Portability: All three units feature lightweight portable designs with built-in large-capacity lithium batteries, supporting continuous all-day field operations.
FAQ
Q1: What equipment is included in this portable cable fault locating system?
The system includes the XHGG502 TDR cable fault pre-locator with a DC 35kV pulse coupler, the XHHV535-2L 35kV high voltage surge generator, and the XHDD503C acoustic-magnetic synchronous pinpointer, covering the complete workflow from fault distance ranging to precise point location.
Q2: What is the pinpointing accuracy of the XHDD503C pinpointer?
It provides acoustic-magnetic positioning accuracy of less than 0.1m and path identification accuracy of less than 0.5m, with BNR background noise reduction, 8-level adjustable acoustic and magnetic gains, and an IP65 waterproof probe.
Q3: What types of cable faults can this system detect?
It detects low-resistance, short-circuit, open-circuit and disconnection faults, as well as high-resistance leakage and high-resistance flashover faults in power cables, high-frequency coaxial cables, street light cables and buried wires rated 35kV and below.
Q4: What is the role of the XHHV535-2L surge generator?
It delivers 0-35kV impulse voltage with up to 1225J discharge energy to break down and flash over the cable fault point, generating the acoustic and electromagnetic signals required for acoustic-magnetic synchronized pinpointing. It also supports DC withstand voltage testing.
Q5: Which standards does the system comply with?
The pre-locator complies with GB/T 18268.1, DL/T 849.1-2019 and JJF1042-2020, the pinpointer complies with DL/T 849.2-2019, the surge generator complies with DL/T 846-2016 and DL/T 474-2017, and the complete system is CE and ISO certified.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2013
Total Annual:
1000000-5000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd.
Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd.
Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...
