Product DescriptionPractical Performer
The XHHV535-2L is a practical portable DC high-voltage impulse surge generator delivering 1024J discharge energy at up to 32kV for underground power cable fault location and DC withstand voltage testing. Engineered for everyday field reliability, it combines essential impulse testing capabilities with a straightforward, no-frills design that keeps both acquisition and maintenance costs low.
The unit integrates a DC high-voltage source, 2μF energy storage capacitor, discharge ball gap, and automatic discharge device into a compact, accessible form factor. Its standout practical feature is the dual EMP and DC output terminals—eliminating cable swaps when switching between impulse fault location and DC withstand testing. A built-in time relay with adjustable 0–100s discharge intervals enables hands-free cyclic operation during extended fault search operations. The front panel includes a manual ball-gap discharge button, zero-start protection with potentiometer return-to-zero, emergency stop, and comprehensive over-current (8mA/3s), over-voltage, and over-temperature (65°C) automatic protection.
Why XHHV535-2L?
Designed for Practicality
When high-spec instruments exceed your operational needs but basic tools fall short, the XHHV535-2L delivers the right balance of performance and value. Its 1024J nominal output handles the majority of common cable fault scenarios without the premium cost of higher-spec alternatives.
EMP & DC Dual Terminals
Two separate high-voltage output terminals—EMP for impulse discharge and DC for withstand voltage testing—allow the operator to switch between test modes by simply moving the test lead, with no need to access rear terminals or reconfigure internal connections.
32kVMax Output
1024JDischarge Energy
2μFCapacitor
0-100sAdjustable Timer
EMP+DCDual Output
Key Features
- EMP and DC dual output terminals—separate ports for impulse discharge and DC withstand, no reconfiguration needed
- Built-in 0–100s adjustable time relay for automated cyclic impulse discharge at your preferred interval
- Manual ball-gap discharge button: operator-triggered single impulses (max 1s per press)
- DC withstand voltage and impulse discharge dual-mode operation
- Super short-circuit protection: high-voltage output can directly short-circuit to ground and continue operating
- Dual 2.5-level pointer meters for real-time voltage and current monitoring—discharge process visible at a glance
- High-voltage side voltage measurement for real-time accuracy
- Zero-start protection with potentiometer return-to-zero: start blocked unless voltage at minimum
- Emergency stop button: immediate high-voltage cutoff in any situation
- Auto-discharge: voltmeter indicates capacitor voltage in real time even when stopped; residual charge safely discharged
Technical Parameters
| Model | XHHV535-2L |
|---|
| Impact High Voltage | 0–32kV (adjustable) |
|---|
| Built-in Capacitor | 2μF |
|---|
| Discharge Energy | 0–1024J |
|---|
| Output Voltage Polarity | Negative polarity |
|---|
| Impact Power | 400W |
|---|
| High Voltage Accuracy | 2.5 level |
|---|
| Over-Temperature Protection | 65°C |
|---|
| Over-Current Protection | 8mA (trigger >3 seconds) |
|---|
| Discharge Interval | 0–100s adjustable (built-in time relay) |
|---|
| Output Terminals | EMP (impulse) + DC (withstand) dual output |
|---|
| Power Supply | AC220V±10%, 50Hz±2Hz (60Hz supported) |
|---|
| Ambient Temperature | -20 – +50°C |
|---|
Panel Layout
| Control / Port | Function |
|---|
| Safety Ground | Instrument chassis ground; connect reliably to earth |
| High-Voltage Ground | HV tail grounding; prevents leakage and discharge hazards |
| Sampling Ground | Pulse capacitor negative terminal for flashover waveform sampling |
| Discharge Button | Manual ball-gap contact discharge (max 1s press duration) |
| HV Start Button | Light on = zero state (button valid); light off = blocked |
| HV Stop Button | Cuts HV immediately; triggers internal discharge; HV light goes out |
| Over-Current Protection | Press to arm; pops up when 8mA >3s detected |
| Voltage Adjustment | Must turn CCW to zero first; then press Start, adjust CW to boost |
| Power Switch | Gear 1 = AC220V on; Gear 0 = system off |
| Fuse Socket | AC220V power supply fuse |
| Power Socket | AC220V working power input |
| Time Setting | Adjustable discharge interval: 0–100 seconds |
| Ammeter | Low-voltage side current indication |
| Voltmeter | High-voltage output kV indication |
| HV Output — EMP | Impulse discharge output terminal |
| HV Output — DC | DC withstand voltage output terminal |
Target Applications
The XHHV535-2L is built for entry-level cable testing teams, municipal utility workshops, vocational training centers, and cost-conscious contractors in developing markets—organizations that need reliable 32kV impulse fault location and DC withstand testing at an accessible price point. Its EMP/DC dual terminal design and 0–100s adjustable timer make it especially suitable for training environments where students need to learn both fault location and withstand voltage procedures on a single instrument, and for routine maintenance programs where daily reliability matters more than high-end precision. For premium performance with 1.5-level accuracy and higher discharge energy, see the XHHV535-4Z (35kg, 2450J) or XHHV535-2L upgrade (25kg, 1225J).
▎Frequently Asked Questions
Q: How does a high voltage surge generator work in cable fault detection?
The surge generator discharges a high-energy pulse into the faulty cable, creating a controlled high-voltage arc at the fault point. This arc produces both an acoustic signal (loud thumping sound detectable by ground microphones) and an electromagnetic pulse (detectable by an inductive receiver). By combining acoustic and electromagnetic signal arrival times, operators can pinpoint the exact fault location with precision—a technique known as acoustic-magnetic synchronization.
Q: Which voltage range should I select for different cable types?
Voltage selection follows the cable's rated operating voltage as a general guideline. For low-voltage cables (up to 1kV), use the 8kV or 12kV range. For medium-voltage distribution cables (6-15kV), the 16kV range is appropriate. For high-voltage transmission cables (35kV and above), use the 32kV range. Always consult the cable manufacturer's maximum test voltage specifications and ensure all safety clearances are maintained during high-voltage operation.
Q: What safety precautions must be observed during surge generator operation?
High voltage surge generator testing requires strict safety protocols. Always verify the cable is fully de-energized and isolated from all power sources before connection. Establish a minimum 5-meter safety perimeter around the test zone with warning signs. All personnel must wear appropriate PPE including arc-rated clothing, HV insulating gloves, and dielectric overshoes. The integrated safety features—automatic discharge upon power-off, emergency stop, and zero-voltage interlock—provide additional layers of protection but should never replace proper safety procedures.
Q: What is the advantage of multiple energy levels (Joules) on this unit?
Different energy levels serve different diagnostic purposes. Low energy settings (e.g., 864J–1024J) are ideal for initial fault confirmation and locating high-resistance faults where excessive energy could worsen cable damage. Medium energy (1225J–2048J) provides optimal acoustic signal strength for most routine fault pinpointing. High energy (2450J+) is reserved for very long cables, deep burial scenarios, or high-impedance faults that require stronger arc generation to produce a detectable acoustic signature. The three-level selection allows operators to match energy output to field conditions.
Q: What warranty and support is included with this surge generator?
12-month standard warranty against manufacturing defects with lifetime technical support. CE and ISO 9001:2015 certified. Each unit includes the surge generator, HV output cable, ground cable, discharge rod, user manual, and a rugged transport case. On-site installation, commissioning, and operator safety training are available upon request. Spare parts including discharge gaps, capacitors, and HV diodes are stocked for rapid replacement.
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