Product Features
1. The required power capacity is greatly reduced. The system uses resonance between the reactor and the test object capacitance to generate high voltage, so the power supply only provides active power loss. The required power is only about 1/Q of the test capacity.
2. The size and weight of the equipment are significantly reduced. The system eliminates large power frequency transformers and high-power voltage regulators, making the equipment much smaller and lighter than traditional test systems (about 1/10 to 1/30 of conventional equipment).
3. Provides a high-quality sine wave output. The resonance circuit works as a filter to reduce waveform distortion and prevent false breakdown caused by harmonic peaks.
4. Effectively protects the test object from damage. When insulation failure occurs, the system quickly reduces the current to prevent large short-circuit current from burning the fault point.
5. No recovery overvoltage after breakdown. When the test object fails, the resonance condition disappears immediately, the high voltage drops quickly, and the arc is extinguished safely without generating dangerous recovery voltage.
6. Equipped with multiple protection functions, including overvoltage protection, overcurrent protection, zero-start protection, and detuning/flashover protection. Protection values can be adjusted according to user requirements.
7. Lightweight and portable design, suitable for on-site high voltage testing applications.
8. Provides three operation modes for flexible testing: automatic mode, manual mode, and automatic tuning with manual voltage boosting mode.
9. Supports remote data storage and printing. Test records are stored digitally for easy searching and analysis.
10. Automatic frequency scanning allows users to set the start frequency and scanning direction. The resonance curve is displayed on the LCD screen for easy identification of the resonance point.
11. Uses advanced DSP platform technology, allowing easy function upgrades and improved human-machine interface design.
Applicable Scope
| Test object | Capacitance | Test frequency | Test voltage | Test time |
| 3km 6kV/300mm2 cable | ≤1.41μF | 30～300Hz | ≤15kV | 15min |
Overall Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Voltage | 20 kV |
| Application | 6 kV Cable Testing |
| Working Frequency | 30~300 Hz |
| Test Voltage | ≤15 kV |
| Test Time | 15 minutes |
| Output Voltage Waveform Distortion | <1.0% |
| Continuous Working Time | 60 minutes under rated conditions |
| Quality Factor (Q) of Device | >50 |
| Quality Factor (Q) for GIS, Switchgear and Other Tests | >20 (Load Related) |
| Input Power Supply | Three-phase 380V or Single-phase 220V |
| Frequency Regulation Range | 30Hz~300Hz |
| System Measurement Accuracy | 1.5% |
| Protection Functions | Over-voltage protection, over-current protection, zero-start protection, and other safety protections |
Composition of Testing System
| No. | Devicename | Specification | Unit | Quantity |
| 1 | Excitation transformer | RDJLB-6kVA/1kV/0.4kV | Pc | 1 |
| 2 | Variable frequency power control box | RDXZ-6kVA/380V | Pc | 1 |
| 4 | HV electric reactor | RDDK-5kVA/20kV | Pc | 4 |
| 5 | AC voltage divider | FC-20kV/5000pF | Pc | 1 |
| 6 | Test line | Set | 1 |
