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.
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.
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.
| 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 |
| 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 |
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).
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