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- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GIT-450kVA/150kV PD-free AC Dielectric Test Set is a professional, high-precision integrated test solution for AC withstand voltage testing and partial discharge (PD) measurement of medium and high voltage electrical equipment. Engineered with a proprietary low-inductance, PD-optimized circuit design, it delivers an industry-leading ultra-low background partial discharge level of ≤5pC at rated 150kV output, eliminating system interference and ensuring accurate, reliable PD detection of the test object.
This all-in-one system integrates a variable frequency power supply, excitation transformer, PD-free HV test transformer, standard capacitive voltage divider, and multi-channel PD detection unit. Fully compliant with IEC 60270, IEEE 4, and GB/T 7354 international and domestic standards for high-voltage partial discharge measurements, it is the definitive test solution for power equipment manufacturers, electric power utilities, third-party testing institutions, and HV research laboratories worldwide.
Specifications
| Parameter | Specification |
| Model | GIT-450kVA/150kV |
| Rated Capacity | 450kVA |
| Rated Output Voltage | 0~150kV AC, continuously adjustable |
| Rated Output Current | 3A |
| Input Power Supply | 3-phase 380V±10%, 50/60Hz |
| Output Frequency | 45~65Hz adjustable |
| Output Waveform | Pure sine wave, THD <3% |
| Voltage Measurement Accuracy | ≤1% Full Scale |
| Background Partial Discharge Level | ≤5pC @ 150kV rated output |
| PD Detection Frequency Band | 10kHz~1MHz, adjustable |
| PD Measurement Sensitivity | ≤1pC |
| Timing Function | 0~9999s programmable test duration |
| Protection Functions | Over-voltage, over-current, short-circuit, flash-over, zero-start interlock, E-stop |
| Display & Control | 10.1-inch industrial touchscreen, automatic + manual dual mode |
| Data Storage | 100,000+ groups of test records, USB export (Excel/PDF) |
| Operating Environment | -10°C ~ +50°C, ≤95% RH (non-condensing) |
| Compliance Standards | IEC 60270, IEEE 4, GB/T 7354, CE |
| Core Components | Variable frequency power supply, PD-free test transformer, capacitive voltage divider, multi-channel PD detector |
Applications
Core Test Objects
· Power Transformers & Instrument Transformers: AC withstand voltage test and partial discharge measurement of distribution and power transformers, current transformers (CT), and voltage transformers (PT)
· Gas Insulated Switchgear (GIS) & HV Switchgear: Factory type test, on-site commissioning test, and PD detection of GIS, circuit breakers, and medium/high voltage switchgear
· HV Power Cables & Accessories: AC withstand test and PD measurement of XLPE power cables, cable joints, and terminations
· Insulators & Bushings: Dielectric withstand test and partial discharge detection of composite insulators, porcelain insulators, and HV transformer bushings
· Other HV Electrical Equipment: Surge arresters, capacitors, reactor coils, and other capacitive/inductive HV equipment insulation performance testing
Industry-Specific Usage
· Electrical Equipment Manufacturers: Production line quality control, factory outgoing inspection, and type testing of transformers, GIS, switchgear, and cables
· Electric Power Utilities: Substation equipment commissioning, handover acceptance test, and preventive maintenance of transmission and distribution assets
· Third-Party Testing & Certification Institutions: Compliance testing, performance verification, and arbitration testing of HV electrical equipment
· HV Research & Academic Institutions: Insulation material research, dielectric performance testing, and high-voltage engineering experimental research
· Industrial & Petrochemical Facilities: HV power system equipment maintenance and safety verification for high-reliability production facilities
Advantages
Strict Global PD Test Standard Compliance
Fully designed, calibrated, and tested in accordance with IEC 60270 (High-voltage test techniques – Partial discharge measurements), IEEE 4, and GB/T 7354 international standards. Test data is globally recognized, meeting the requirements of equipment factory certification, international project handover, and third-party testing.
Unmatched Ultra-Low Background PD Performance
The system’s core advantage is its ≤5pC ultra-low background partial discharge at rated 150kV output, which is far superior to the industry standard 10pC requirement. This ensures that even weak PD signals from the test object are accurately captured, enabling early detection of insulation defects that cannot be identified by conventional withstand testers.
All-In-One Withstand & PD Integrated Testing
Unlike traditional solutions that require separate withstand testers and PD detectors, this system integrates AC dielectric withstand testing and partial discharge measurement into a single unit. It completes both tests with one wiring connection, eliminating repeated setup, cutting test time by 50%, and reducing human error.
Superior Load Adaptability
450kVA high-power output and 3A rated current enable stable testing of large-capacity capacitive loads such as GIS and long power cables, without voltage drop or waveform distortion. The variable frequency design ensures stable output even for large capacitive test objects, adapting to diverse on-site test requirements.
Field & Laboratory Dual-Purpose Design
Modular split structure and rugged industrial design make it suitable for both fixed laboratory type testing and mobile on-site commissioning testing. It delivers the same high precision and low PD performance in both scenarios, eliminating the need for two separate test systems and reducing total equipment investment.
Low Total Cost of Ownership
Integrated design eliminates the need to purchase separate withstand testers, PD detectors, and voltage dividers, reducing upfront capital expenditure. High-stability industrial-grade components ensure long service life with minimal maintenance costs, while its ability to detect early insulation defects helps clients avoid costly equipment failures and unplanned downtime.
FAQ
Q: What does "PD-free" mean for this test set?
A: "PD-free" refers to the system’s ultra-low background partial discharge level, which is ≤5pC at 150kV rated output. This means the test system itself generates no measurable partial discharge interference, ensuring all detected PD signals originate exclusively from the test object, for accurate and reliable PD measurement.
Q: What international standards does this system comply with?
A: The system is fully designed, calibrated, and tested in accordance with IEC 60270 (High-voltage test techniques – Partial discharge measurements), IEEE 4, and GB/T 7354 international standards for partial discharge testing and AC withstand voltage testing.
Q: Can it perform AC withstand test and PD measurement at the same time?
A: Yes. This is an integrated system that supports synchronous AC withstand voltage testing and partial discharge measurement in a single test setup. It eliminates the need for separate test equipment and repeated wiring, greatly improving test efficiency.
Q: What types of HV equipment can this system test?
A: It is suitable for all medium and high voltage electrical equipment, including power transformers, instrument transformers, GIS, HV switchgear, power cables and accessories, insulators, bushings, surge arresters, and capacitors.
Q: Is it suitable for both laboratory and on-site field use?
A: Yes. The modular split design and rugged industrial chassis make it easy to transport and assemble for on-site field testing, while its high precision and stable performance also meet the strict requirements of fixed laboratory type testing and calibration.
Q: What is the warranty and after-sales support?
A: We provide a standard 1-year whole-machine warranty, lifetime technical support, on-site commissioning, calibration, and maintenance services through our global service network. Extended warranty plans are available upon request.
Q: Can test data be exported for compliance reporting?
A: Yes. The system has built-in large-capacity data storage, and supports USB export of test records, PD waveforms, and automatically generated test reports in Excel/PDF format, with full traceability for compliance documentation and project handover.
