
15kVA/150KV Partial Discharge Test System (GDYT-15/150)
Product Introduction
Our factory has a history of more than ten years in the six phase protection relay test set, transformer onload tapchanger tester, battery discharge device industry with rich experience, and that's how we won market reputation. Our production line staff have rich production management experience, including production planning, production line management, production line maintenance. Our original production, ingenuity manufacturing, quality assurance, reasonable price, looking forward to your cooperation. 'Only choose the right, not the expensive'. How to stand in the perspective of customers, it is the most difficult to provide the most suitable products for customers according to the needs of customers. This is the advantage of our company. We are committed to the development of high, refined, top products. And we use 'High efficiency, superior performance' as business goal to achieve the development of enterprise, social service goals and further development.
HZ-9003C Handheld Multifunctional Partial Discharge Tester
Overview
The HZ-9003C multifunctional partial discharge tester is designed for on-line detection and location of partial discharge in high-voltage equipment. It is developed based on our extensive experience in the field of partial discharge measurement.




System Overview
The system is equipped with composite TEV sensors, ultra-high frequency (UHF) sensors, high-frequency current transformers (HFCT), and high-sensitivity ultrasonic sensors to collect partial discharge signals from high-voltage equipment. It employs multilevel detection frequency reduction techniques to lower the discharge frequency of signals, while utilizing high-speed AD conversion circuits for signal digitization. Digital signal processing and adaptive filtering interference suppression methods ensure the reliability of test data.
By collecting various signals generated by partial discharge in different high-voltage equipment, the system enables rapid assessment of equipment operating status. The tester can be installed for online detection without affecting equipment operation, allowing workers to promptly evaluate switchgear cabinet conditions. This significantly improves equipment operational reliability, safety, and effectiveness.
System Components
The HZ-9003C includes:
Device host
Specialized partial discharge detection software
TEV sensor
Ultrasonic sensor (USS)
Ultrasonic concentrator (ELTW)
High-frequency current transformer (HFCT)
UHF sensor
Earphone and connecting cables
Technical Data
Composite TEV measurement | |
Sensor | Capacitive |
Range | 0~60dBmV |
Resolution | 1dB |
Error | ±1dB |
Detection Bandwidth | 5~70MHz |
Pulse/Cycle maximum | 655 |
Threshold adjustment range | 3~57dB |
High frequency current transformer | |
Detection Bandwidth | 10kHz~30MHz |
Signal transit mode | 50Ω cable |
Detection sensitivity | 10pC |
Ultrasonic concentrator | |
Measurement range | -7dBμV~68 dBμV |
Resolution | 1dB |
Error | ±1dB |
Sensor sensitivity | -65dB (0dB = 1volt/μbar effective value SPL) |
Sensor central frequency | 20~50kHz |
Sensor diameter | no more than 50mm |
Heterodyne frequency | 38.4kHz |
Non - contact ultrasonic energy collector | |
Effective acceptance distance | 30m |
Sensor center frequency | 40 kHz |
Diameter of sensor | 16mm |
External diameter of parabolic reflector | 275mm |
Standard diameter of parabolic reflector | 250mm |
Weight | 0.6kg |
Ultrahigh frequency sensor | |
Detection bandwidth | 300MHz~1.5GHz |
Signal transit mode | 50Ω cable |
Detection sensitivity | 1dB |
Gain | >65dbm |
Anti-interference Earphone Mic | |
Earphone Mic | vivo |



We sincerely welcome new and old customers all over the world with excellent product quality of the 15kVA/150KV Partial Discharge Test System (GDYT-15/150) and high-quality service system. We strictly follow the principle of system reliability and system flexibility, fully combine the process requirements and characteristics, and wholeheartedly provide technical support for customers. We focus on the challenges and pressures of customer concerns, provide competitive products and services, and continue to create maximum value for our customers.
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