High Voltage Surge Generator XHHV515-8L 15kV 900J Impulse Flashover Tester Cable Fault Locator 10kV Distribution Cable
The XHHV515-8L high voltage surge generator delivers adjustable 0-15 kV impulses with up to 900 J discharge energy from a built-in 8 μF capacitor, breaking down high-resistance and leakage fault points on 10 kV and below power cables so the fault distance can be captured and calculated from the flashover waveform. It also serves as a DC withstand voltage test source, giving utility cable teams one portable instrument for both fault pre-location and insulation testing.
Designed for electric power utilities, municipal grid companies and cable operation & maintenance teams that keep 10 kV distribution cable networks running. XHHV515-8L turns high-resistance and leakage cable faults into fast, measurable pre-location results so outage time stays short.
Utility cable O&M departments responsible for 10 kV distribution feeders and urban cable networks
Power outage rush-repair crews that must locate cable faults quickly under time pressure
Cable testing and fault location service providers working for grid operators
Substation, switchgear and distribution room teams performing cable acceptance and DC withstand tests
Key Specifications
| Model | XHHV515-8L |
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| Product Type | High Voltage Surge Generator (Impulse Flashover Generator) for Cable Fault Locating |
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| Impulse Voltage | 0 - 15 kV (continuously adjustable) |
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| Short-circuit Current | 0 - 320 mA |
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| Built-in Capacitor | 8 μF |
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| Discharge Energy | 0 - 900 J |
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| Output Polarity | Negative |
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| Impact Power | 400 W |
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| Over-current Protection | 8 mA (triggered after > 4 s) |
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| Over-temperature Protection | 65 °C |
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| Working Power Supply | AC 220 V ±10%, 50 Hz ±2 Hz |
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| Ambient Temperature | -25 °C to +65 °C |
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| Dimensions (L*W*H) | 540 * 300 * 450 mm |
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| Net Weight | ≤25 kg |
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| Applied Standards | DL/T846-2016, DL/T474-2017 |
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Core Features
Every function is packaged into a single 25 kg unit that replaces the traditional test transformer, control box and pulse capacitor combination, cutting setup time and crew size on outage repair sites.
Integrates a DC high-voltage source, an 8 μF energy-storage capacitor and a discharge ball gap in one portable unit, replacing the traditional test transformer, control box and pulse capacitor combination.
Dual functions: high-voltage impulse (surge) discharge for cable fault flashover pre-location, and DC withstand voltage testing of electrical equipment.
Complete protection chain: over-current protection (8 mA), over-voltage protection, over-temperature protection (65 °C) and zero-start protection with potentiometer zero output.
Super short-circuit protection: the high-voltage output can be short-circuited directly to ground without damaging the instrument.
High-voltage-side voltage measurement with dual 1.5-class pointer meters for current and voltage; the voltmeter displays the capacitor voltage even in the stop state.
Uniform and controllable high-voltage pulse with adjustable discharge interval, simplifying fault point breakdown and waveform capture.
Designed for 10 kV and below power cable fault detection, complying with DL/T846-2016 and DL/T474-2017.
Field Workflow in Utility Cable Fault Repair
In utility outage repair, the surge generator works as the core of a complete fault location workflow:
Step 1 - Verify the fault phase: measure insulation resistance of each phase with a megger to confirm the faulty phase and estimate the fault nature.
Step 2 - Measure the full cable length with the low-voltage pulse method to obtain the total length waveform as the reference.
Step 3 - Connect the XHHV515-8L to the faulty phase and raise the impulse voltage until the fault point breaks down and a stable flashover waveform is captured.
Step 4 - Calculate the fault distance from the flashover waveform and mark the predicted position on the cable route.
Step 5 - Confirm the exact fault point along the route with an acoustic-magnetic pinpointing receiver before excavation, minimizing digging area and repair time.
FAQ
Is the XHHV515-8L suitable for locating faults on 10 kV distribution cables?
Yes. It is designed for power cable fault detection on 10 kV and below networks and complies with DL/T846-2016 and DL/T474-2017. By applying a high-voltage impulse, the surge generator breaks down high-resistance and leakage fault points so that a clear flashover waveform can be captured for distance calculation.
Which types of cable faults can the impulse generator handle?
It is most valuable for high-resistance grounding, leakage-type and flashover faults, which cannot be resolved by low-voltage pulse testing alone. Once the fault point breaks down under the 0-15 kV impulse, the reflected waveform gives a reliable pre-location distance for the repair crew.
How is the output energy controlled during field testing?
The impulse voltage is continuously adjustable from 0 to 15 kV and the discharge energy reaches up to 900 J with the built-in 8 μF capacitor. The voltmeter displays the capacitor voltage, and the potentiometer design with zero-start protection allows the operator to raise the voltage gradually and safely.
What protections does the instrument provide for utility field crews?
The XHHV515-8L is equipped with over-current protection (8 mA), over-voltage protection and over-temperature protection (65 °C). Its super short-circuit protection allows the high-voltage output to be short-circuited directly to ground without damage, which simplifies safety handling on site.
Can one operator carry and use the XHHV515-8L during rush repair?
Yes. The complete unit weighs no more than 25 kg with dimensions of 540 * 300 * 450 mm, so it can be transported and set up by one or two people. It runs on AC 220 V ±10% / 50 Hz and operates reliably from -25 °C to +65 °C.
Contact XZH TEST for the XHHV515-8L high voltage surge generator, application guidance and the complete 10 kV cable fault location system including TDR pre-locator and pinpointing receiver.
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