Trolley High Voltage Impulse Generator | Cable Fault Locator | XHHV535-4T
The XHHV535-4T trolley high voltage surge generator is mainly used for underground cable fault testing of voltage levels of 35kV and below; it can also be used for DC withstand voltage tests of other electrical equipment.
The device integrates a DC high-voltage source, an energy storage capacitor, a discharge ball device, an automatic discharge device and a voltage level switching device into one cabinet. It adopts high-precision, high-stability special high-voltage electronic components and high-frequency high-voltage technology, making the overall structure simple and reliable. The instrument fully meets the requirements of DL/T846-2016 "General Technical Conditions for High-Voltage Test Equipment" and DL/T474-2017 "Implementation Guidelines for Field Insulation Tests".
Applications & Target Audience: Engineered for renewable energy power station operation and maintenance teams, water conservancy and hydropower engineering departments, metallurgical plant electrical maintenance crews, and cable fault locating and electrical testing contractors that perform DC withstand voltage tests and high-voltage flashover surge tests on cables and electrical equipment up to 35kV.
Product Features
Overcurrent, overvoltage and overheating automatic protection functions;
Dual 2.5-level pointer meter display for current and voltage, intuitive and clear, showing at a glance whether the fault point is fully discharged;
Zero start protection for safer and more reliable operation;
High-voltage pulse output is uniform and controllable;
High-voltage side voltage measurement, real-time and accurate;
Unique high-voltage measurement design: in the stop state, the internal capacitance of the device is automatically discharged;
Discharge time can be selected in two modes: timing and manual;
With DC withstand voltage function;
High-precision test cable fault sampling waveform module installed inside;
Humanized trolley design, easy to move on site.
Technical Specification
| Parameter |
Specification |
| Impulse high voltage |
0~35kV optional |
| High voltage divider |
Voltage accuracy level 2.5 |
| Built-in capacitor |
4μF |
| Output voltage polarity |
Negative polarity |
| Discharge power |
2550J |
| Impact time |
About 7 seconds for automatic impact; arbitrary control time for manual impact |
| Impact power |
2000W |
| Overcurrent protection |
10A (more than 5 seconds) on the low-voltage side |
| Volume |
534L×444W×805H mm |
| Weight |
No more than 130kg |
| Working power supply |
AC 220V±10%, 50Hz±2Hz |
| Ambient temperature |
-20~+60°C |
| Applicable standards |
DL/T846-2016, DL/T474-2017 |
Working Principle and Operation Examples
After selecting the function switch and the voltage gear switch, press the start button to perform high-voltage boosting; the energy storage capacitor is charged until the discharge ball gap breaks down, and a high-voltage, high-energy pulse is applied to the cable under test to burn down the fault point or trigger flashover. The following operation examples from the user manual cover the typical on-site workflows:
| Operation Example |
Key Steps |
Typical Application |
| 10kV DC Withstand Voltage Operation |
Ground the three ground terminals reliably, select the DC gear, start the high voltage, and slowly raise the voltage to DC 10kV and hold it for the test. |
DC withstand voltage test of cables and electrical equipment |
| 20kV Periodic Impulse Discharge Operation |
Select the Cycle gear and slowly raise the voltage to DC 20kV; the instrument performs periodic impulse discharge automatically; connect the cable fault tester for high-voltage flashover sampling to roughly measure the fault distance. |
Burning down cable faults and flashover pre-location before precise fault locating |
| 20kV Single Discharge Operation |
Select the Single gear, raise the voltage to DC 20kV, and press the Single key each time a discharge action is required. |
One-shot surge discharge for fault burning and waveform observation |
After the test, turn the voltage control knob counterclockwise to the zero position, press the stop button, and use the discharge rod to fully discharge the tested cable before removing any wiring, ensuring operator safety.
Packing List
| Item |
Quantity |
| High voltage surge generator |
1 set |
| Power cable |
1 piece |
| High voltage output line |
1 piece |
| Transparent ground wire |
1 set |
| Discharge rod |
1 piece |
| Fuse (8A) |
5 pieces |
| Tool wire pack |
1 set |
This instrument provides field engineers with a reliable, comprehensive solution for high-voltage cable fault burning and DC withstand testing, helping restore power quickly through efficient fault breakdown and flashover pre-location.
FAQ
Q1: Who is this trolley high voltage impulse generator designed for?
It is designed for renewable energy power station operation and maintenance teams, water conservancy and hydropower engineering departments, metallurgical plant electrical maintenance crews, and cable fault locating and electrical testing contractors that perform DC withstand voltage tests and high-voltage flashover surge tests on cables and electrical equipment up to 35kV.
Q2: What is the XHHV535-4T used for?
It is mainly used for underground cable fault testing of voltage levels of 35kV and below, including burning down fault points and triggering flashover for fault distance measurement together with a cable fault tester; it can also be used for DC withstand voltage tests of other electrical equipment.
Q3: What are the key technical specifications of the XHHV535-4T?
It features 0~35kV adjustable impulse high voltage, 2550J discharge power, 4μF built-in capacitor, 2000W impact power, about 7 seconds automatic impact interval, 10A low-voltage side overcurrent protection, a trolley design of 534×444×805mm with a weight of no more than 130kg.
Q4: What safety protections does the XHHV535-4T provide?
It provides overcurrent, overvoltage and overheating automatic protection, zero start protection, and a unique high-voltage measurement design that automatically discharges the internal capacitance in the stop state. The safety ground, high-voltage ground and sampling ground must be reliably grounded separately, and the discharge rod is used to fully discharge the tested cable before wiring is removed.
Q5: What is included in the delivery and what after-sales service is provided?
The delivery includes the high voltage surge generator host, power cable, high voltage output line, transparent ground wire, discharge rod, 5 fuses (8A) and a tool wire pack. The instrument is guaranteed free of charge for product quality problems within one year from the date of purchase, with lifetime maintenance and technical services provided.
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