Table of Contents

Product Introduction

The HF-CH-217 high-frequency high-voltage generator for cable testing is an innovative upgraded product newly developed by our company based on years of research into cable fault detection technology, ranking top domestically. It complies with the technical specifications for high-voltage test equipment stipulated under Chinese national power industry standards.

Primarily applied to cables rated 35kV and below, it delivers impulse discharge for waveform sampling during high-resistance cable fault testing and fault pinpointing. It can also perform breakdown testing for high-resistance faults and metallic grounding faults on power cables.

Adopting switching power supply principles, this unit stands out for its light weight, high and stable output voltage. The entire instrument weighs only 11.2 kg, drastically improving mobility for field operations and eliminating bulky traditional equipment. It serves as an advanced high-voltage power source for cable fault testing and precise fault location, replacing the 65kg conventional test transformer and operating console. It also resolves tedious on-site wiring issues during cable tests. Its capability to output 35kV high voltage at high frequencies fills a domestic technical gap in cable fault detection.

Testing Functions

It is used for impulse discharge waveform sampling and fault pinpointing of high-resistance faults on cables up to 35kV. It also carries out breakdown tests on high-resistance cable faults; its powerful breakdown capacity can puncture fault points rapidly and reduce the grounding resistance at breakdown locations.

Features & Main Functions

Voltage adjustment and automatic voltage stabilization functions
Built-in open-circuit and short-circuit automatic protection
Output voltage displayed clearly and reliably via liquid crystal digital meter
Cabinet constructed from insulating materials to guarantee absolute operational safety
Compact dimensions: 410×230×310 mm, lightweight (11.2 kg)
Continuous operating time: 4–6 hours, sufficient for complete cable fault testing procedures

Technical Specifications Table

Item	Parameter
Maximum Working DC Negative Voltage	≤32kV
Maximum Operating Current	≤30mA
Voltage Display Error	±2%
Discharge Energy	≤2450J/3.5S
Minimum Discharge Interval	3.2 seconds
Maximum Power Consumption	＜1.5kVA
Maximum Breakdown Power	1000W

Packing List

No.	Item Description	Quantity	Unit	Remarks
1	Main Unit (High Voltage Power Supply Host)	1	Set	Core testing equipment
2	High Voltage Output Connecting Cable	2	Piece	For cable fault discharge connection
3	Grounding Earthing Wire	1	Piece	Safety grounding during operation
4	Power Input Cord	1	Piece	AC 220V power supply line
5	Operation & Maintenance Manual (English + Chinese)	1	Copy	Complete technical instructions
6	Factory Calibration Certificate	1	Copy	Metrology calibration document
7	Inspection Acceptance Report	1	Copy	Factory FAT test record
8	Spare Fuse	2	Piece	Replacement consumable parts
9	Portable Hard Carry Case	1	Piece	Shockproof packaging for transportation

FAQ: High Voltage Power Supply for Cable Testing

Q1: What is this high voltage power supply mainly used for?

A1: It is designed exclusively for fault location & testing of 35kV and below power cables. It performs impulse discharge sampling, pinpointing high-resistance cable faults, and breakdown tests for high-resistance & metal earthing faults on underground cables.

Q2: What advantages does your portable unit have over traditional test transformers?

A2: The whole device only weighs 11.2kg, far lighter than conventional 65kg transformers. It integrates voltage regulation, discharge control and full safety protection, simplifying on-site wiring and greatly improving field mobility.

Q3: What is the maximum output voltage of the power supply?

A3: Max working DC negative voltage: ≤32kV, adjustable continuously to meet various cable breakdown and discharge test requirements.

Q4: How long can the equipment run continuously on site?

A4: Continuous working time ranges from 4 to 6 hours, fully sufficient for one round of complete cable fault detection work.

Q5: What is the discharge energy and minimum discharge interval?

A5: Discharge energy ≤2450J/3.5S; Minimum discharge interval: 3.2 seconds, supporting rapid repeated breakdown for hard high-resistance cable faults.

Q6: Does the device have complete safety protection functions?

A6: Yes. It is equipped with open-circuit protection, short-circuit automatic protection and built-in voltage stabilization system. The cabinet is made of insulating material to guarantee personal safety during high-voltage operation.

Q7: Can it work normally under harsh outdoor ambient conditions?

A7: Working temperature: -10℃ ~ +40℃; applicable relative humidity ≤80%; suitable for use at altitudes below 1000m, adaptable to most outdoor power construction environments.

Q8: How accurate is the built-in voltage display?

A8: Adopts LCD digital display, voltage display error is controlled within ±2%, readings are clear and reliable for on-site reference.

Q9: What input power does this device require?

A9: Standard input: AC 220V±10%, 50Hz±2Hz, compatible with conventional industrial and domestic mains power worldwide.

Q10: What is the maximum breakdown power for cable fault piercing?

A10: Max breakdown power reaches 1000W, which can quickly puncture high-resistance fault points and reduce grounding resistance for easier fault pinpointing.

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