Integrated DC Withstand Voltage & Impulse Discharge High Voltage Surge GeneratorProduct Overview
The XHHV515-8L is an integrated high voltage surge generator that combines DC withstand voltage testing and impulse discharge functionality in a single compact unit. Fully compliant with DL/T846-2016 and DL/T474-2017 standards, it serves as both a precision DC high voltage source for electrical equipment testing and a high-energy impulse power supply for power cable fault detection. The system integrates a DC high voltage source, 8μF energy storage capacitor, and discharge ball gap, replacing traditional configurations that typically require over 110kg of separate components.
Utilizing high-precision high-voltage electronic components and advanced high-frequency technology, the XHHV515-8L achieves an ultra-lightweight design at ≤25kg while maintaining robust performance. The dual 1.5-class pointer meters provide real-time current and voltage monitoring, ensuring operators can precisely track the discharge process and fault point condition at a glance.
Key Features
- Dual-function operation: DC withstand voltage testing and impulse discharge modes in one instrument.
- Automatic over-current, over-voltage, and over-temperature protection with integrated safety interlocks.
- Uniform and controllable high-voltage pulse output with user-adjustable discharge time intervals.
- Super short-circuit protection allows direct high-voltage output to ground without damage.
- Dual 1.5-class pointer meters for current and voltage display — intuitive and clear real-time monitoring.
- High-voltage side voltage measurement ensures real-time accuracy during testing.
- Zero-start protection and potentiometer zero-output function for operator safety.
- Unique voltmeter design displays capacitor voltage in real time even in stop state.
- Ultra-lightweight construction at ≤25kg, replacing traditional 110kg+ test setups.
- Wide operating temperature range from -25°C to +65°C for diverse field environments.
Technical Specifications
| Performance Parameters |
| Impulse Voltage Range |
0 ~ 15kV |
| Short Circuit Current |
0 ~ 320mA |
| Built-in Energy Storage Capacitor |
8μF |
| Discharge Power |
0 ~ 900J |
| Output Voltage Polarity |
Negative |
| Impact Power |
400W |
| High Voltage Measurement Accuracy |
1.5 Class |
| Protection & Safety |
| Over-Current Protection |
8mA (trigger ≥4 seconds) |
| Over-Temperature Protection |
65°C automatic cutoff |
| Super Short-Circuit Protection |
Direct HV-to-ground supported |
| Zero-Start Protection |
Potentiometer zero-output lock |
| Physical & Environmental |
| Dimensions (L*W*H) |
540 * 300 * 450 mm |
| Weight |
≤ 25 kg |
| Working Power Supply |
AC 220V ±10% / 50Hz ±2Hz |
| Ambient Temperature Range |
-25°C ~ +65°C |
Working Principle DC Withstand Voltage Mode
Powered by AC 220V, the system outputs a precisely regulated 0-15kV DC voltage. The high-voltage cable voltage is sampled and fed to the voltage-stabilizing control circuit, ensuring stable and accurate output. This mode is suitable for DC withstand voltage testing of electrical equipment including transformers, cables, and switchgear in accordance with DL/T474-2017 field insulation test guidelines.
Impulse Discharge Mode
In impulse mode, the system charges the 8μF energy storage capacitor and discharges through the precision ball gap, generating high-energy pulse signals up to 900J. These controlled impulse signals are applied to the cable under test for fault detection, enabling acoustic-magnetic synchronization fault point determination. The discharge time interval is user-adjustable for optimal fault location precision.
Applications
- DC withstand voltage testing for transformers, switchgear, and electrical equipment.
- Impulse high-voltage power supply for power cable fault detection (≤10kV class).
- Acoustic-magnetic synchronization fault point determination in underground cable networks.
- Field insulation testing in utility substations and industrial power distribution systems.
Compliance: Fully meets DL/T846-2016 "General Technical Conditions for High-Voltage Test Equipment" and DL/T474-2017 "Implementation Guidelines for Field Insulation Tests".
On-site Photos
▎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 protective transport solution. 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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