Product Description
The SXBP Variable Frequency Series Resonance Test System is a professionally engineered high-voltage testing platform developed for AC withstand voltage verification of large-capacity power equipment. It is designed to address the practical challenges of on-site testing, including limited power supply, heavy equipment transportation, complex test objects, and the need for accurate, repeatable results.
Core Advantages
1. Customized Configuration for Complex Test Objects
Every project has different test requirements. The SXBP system can be tailored by adjusting reactor combination, output voltage, current capacity, and frequency range, ensuring it matches the actual capacitive load rather than forcing the customer to adapt to a standard machine.
2. Lower Demand for On-Site Power Capacity
By operating at series resonance, the system achieves high test voltage with relatively low input power. In practical field applications, testing can often be completed using a standard 380 V industrial power supply, which reduces the requirement for large on-site generators or temporary power upgrades.
3. Intelligent Frequency Tracking and Stable Resonance
The variable frequency control unit automatically searches for and locks the resonant frequency, improving test efficiency and reducing operator dependency. With a frequency adjustment resolution of 0.1 Hz and instability of ≤ 0.05%, the system maintains accurate and stable output even under changing field conditions.
4. High Purity Sine Wave Output for Reliable Testing
The SXBP system delivers a pure sine wave output with a total harmonic distortion of ≤ 1%. This is important for avoiding unnecessary dielectric stress and ensuring that test results reflect the true insulation condition of the equipment under test.
5. Modular Design for Easier Transportation and Setup
High-voltage reactors are the bulkiest part of traditional test systems. The SXBP modular structure allows users to arrange reactors in series or parallel according to test requirements, improving flexibility and making field deployment more manageable.
Technical Parameters
| Item |
Specification |
| Rated Capacity |
300 kVA – 20,000 kVA |
| Rated Test Voltage |
200 kV – 2,000 kV |
| Rated High-Voltage Current |
1 A – 100 A |
| Power Supply |
380 V, 50 Hz / 60 Hz |
| System Quality Factor |
Q ≥ 50 |
| Output Frequency Range |
20 Hz – 300 Hz |
| Frequency Resolution |
0.1 Hz |
| Frequency Instability |
≤ 0.05% |
| Output Waveform |
Sine wave |
| Waveform Distortion |
≤ 1% |
| Continuous Operating Time |
60 minutes at rated condition |
| Noise |
≤ 65 dB |
| Temperature Rise |
Coil temperature rise ≤ 65 K after 60 minutes of rated operation |
Application
- AC withstand voltage testing of 110 kV, 220 kV, and 500 kV XLPE power cables
- On-site commissioning and maintenance testing of GIS and high-voltage switchgear
- Withstand voltage testing of power transformers, instrument transformers, and bushings
- Testing of CVT, coupling capacitors, capacitive voltage transformers, and similar apparatus
- Acceptance tests for substations, transmission lines, and electrical installation projects
- Periodic preventive testing for power utilities and industrial power systems
FAQ
Q1: Can the SXBP system be used for both cable and transformer testing?
A: Yes. It can be configured for AC withstand voltage testing of XLPE cables, GIS, transformers, instrument transformers, CVTs, bushings, and other capacitive apparatus.
Q2: What is the main advantage of variable frequency series resonance over conventional test transformers?
A: Variable frequency resonance systems generally require lower input power capacity, are more flexible for different capacitive loads, and can provide purer sine wave output, which is beneficial for on-site acceptance and maintenance testing.
Q3: Is the system suitable for field use?
A: Yes. The modular design, low input power requirement, and comprehensive protection functions make the SXBP system suitable for field testing in substations, construction sites, and outdoor environments.
Q4: What power supply is needed?
A: The system typically operates from a 380 V, 50 Hz/60 Hz industrial power supply. Actual power requirements depend on the test object and system configuration.
Q5: Can you provide a custom solution based on our test objects?
A: Yes. We can design the system according to the rated voltage, capacity, frequency range, reactor combination, and site transportation conditions required by the customer.
