Cable Sheath Fault Locator 60kV Digital Burn-Through Bridge 750mA HV Test Current | XHSC-60Q

The XHSC-60Q cable sheath fault locator is a professional digital burn-through bridge designed for locating sheath, insulation and high-resistance faults in complex cable systems. It integrates burn-through and intelligent bridge measurement in one portable unit: the burn-through mode outputs a rated 60kV DC voltage with a maximum arc current of 400mA to quickly convert high-resistance faults into low-resistance faults, while the digital bridge mode provides up to 750mA test current for highly accurate fault distance measurement.

This instrument is particularly suitable for insulation and sheath fault pre-location of high-voltage, large-cross-section and long-length complex cable systems, including cables with GIS terminals and cross-bonding connections. The complete location can be performed quickly without removing the GIS switch or short-circuiting the cross-bonding, saving significant outage time and labor on site.

This instrument provides cable engineers with a reliable, comprehensive solution for sheath and insulation fault pre-location, dramatically reducing the time needed to find high-resistance faults in complex cable networks.

Cable sheath faults are among the most common yet most difficult cable faults to locate. The outer sheath protects the cable from moisture and mechanical damage, and the inner lining prevents water from penetrating along the conductor. When the sheath is damaged by excavation, corrosion, rodent attack or poor installation, moisture enters the cable and gradually leads to insulation deterioration and eventual failure.

Unlike a complete insulation breakdown, a sheath fault often shows a high-resistance characteristic that blocks conventional test signals. The XHSC-60Q handles these cases with its integrated burn-through function: the 60kV DC output with up to 400mA arc current carbonizes the high-resistance fault point into a stable low-resistance fault, and the digital bridge then measures the fault distance with ±(0.1% ·L + 1) m accuracy. This makes the XHSC-60Q a complete solution for sheath fault pre-location, from fault conversion to distance measurement.

The XHSC-60Q begins every test with an intelligent diagnosis that automatically evaluates the cable condition and selects the most efficient path to locate the fault. The diagnosis result is classified into one of the following categories, and the instrument guides the operator to the correct next step.

For high-resistance and unstable flashover faults, the burn-through mode applies 0 ~ 60kV DC with up to 400mA arc current to carbonize the fault point into a stable low-resistance fault. The operator sets the burn-through voltage, a maximum burn-through time of up to 90 minutes, and the output power. When the smart burn-through function is enabled, the test ends automatically as soon as the fault impedance drops to the level required by the distance measurement mode, saving time and avoiding unnecessary stress on the cable.

The XHSC-60Q provides two distance measurement modes to suit different field conditions. In bridge mode the operator inputs the known cable length; in cross-section mode the operator inputs the cable material and cross-section area, and the fault distance can be measured even when the total cable length is unknown.

In both modes the test current is selectable from 20mA to 750mA. The output voltage is 4000V for currents of 20 ~ 75mA, follows the relationship voltage (V) × current (mA) = 300W for currents of 80 ~ 400mA, and is 400V for currents of 410 ~ 750mA, ensuring a strong signal for accurate measurement in every condition.

The setting menu provides time setting, device information, historical records and function options. Historical test data of both bridge mode and cross-section mode is stored automatically, with a capacity of up to 100 records that can be reviewed, deleted individually or cleared. The function options include the smart burn-through function and the grounding detection function; when grounding detection is enabled, the equipment forcibly checks that the impedance between the protective ground and the working ground is within the safe range, and will not allow voltage boosting otherwise.

The standard delivery includes the intelligent burn-through bridge main unit, the bridge test box, 5 spare fuses (10A, 5 × 20), the FJ1 bridge positioning test lead, the FJ2 low-resistance short-circuit lead, the FJ4 burn-through source output lead, a dedicated grounding cable, a discharge rod grounding cable, the power cord and the discharge rod. Optional FJ1L and FJ4L extended 20m leads are available for long cable sections.

Correct wiring is essential for accurate and safe measurement. The XHSC-60Q supports the operator with an automatic wiring check and protective grounding detection before any high voltage is applied.

Mines and heavy industrial plants operate extensive medium and high-voltage cable networks for power supply, often laid in harsh environments where sheath damage from excavation, vibration and corrosive media is common. The XHSC-60Q helps maintenance teams locate sheath and insulation faults quickly, minimizing production losses and ensuring the safety of critical equipment.

Railway and metro systems depend on reliable power cables along tracks, in tunnels and at stations. Cable faults in these systems cause service disruption and safety risks. The portable 22kg design with pull-rod chassis and casters is ideal for railway maintenance crews, and the blind-spot-free bridge method handles the short cable sections typical of station and signal power networks.

Data centers and commercial buildings contain dense cable networks where downtime is extremely costly. Electrical contractors maintaining these facilities need fast, accurate fault location tools. The automatic diagnosis and one-button operation of the XHSC-60Q reduce the skill requirement for on-site staff, while the automatic data storage provides complete test records for acceptance and maintenance documentation.

Rural power grid renovation projects involve long cable sections with many joints and mixed cable types. The cross-section mode of the XHSC-60Q measures fault distance even when the total cable length is unknown, which is a common situation in rural networks. The wide-range power input from 100V to 240V also adapts to different site power conditions.

Traditionally, burn-through and bridge measurement required two separate instruments with heavy external cabling and manual mode switching. The XHSC-60Q replaces both with one integrated unit.

For more information about the XHSC-60Q cable sheath fault locator, including detailed specifications, demonstration videos and pricing, please contact our sales team. We are glad to recommend the most suitable cable fault location solution for your cable network.