III. Applicable objects

• Partial discharging and AC voltage withstand test for HV electrical engineering and apparatus, such as transformer, GIS, mutual inductor,switch,bushing,arrester,cables.
• Power AC voltage withstand of insulation materials

IV. Technical features

• Little magnitude of complete installation which can guarantee the magnitude within 5pC(except for special cases)
• Expoxy resin poured shell,glass fiber convolved non corona high voltage insulation outer barrel
• Low impedance of complete equipment, complete functions of over voltage,over current, arc protection with reliability
• Dedicated mould processed for grading shield,aluminium molded, smooth surface,light weight, convenient for installation
• The large capacity HV test device employs power frequency intelligent measurement and control system to ensure much higher intelligence and
• automation of controlling and protection.
• Sampling and using optical communication, thoroughly isolate high voltage and low voltage control loop.
• Self-inspection and display of real-time status are available in the testing processing.
• Perfect management function of data and report.
• Being able to record and draw HV U/T,I/T testing curve

V. Test connection figure (For example: model CQSB-500KVA/500KV):

VI. Advantages

1. Pure power frequency test at 50Hz or 60Hz, output voltage distortion (THD) is very small.
2. Meet low partial discharge measurement requirements
3. Modular structure for saving space in the test hall
4. Low impedance, wide application range
5. Easy to operate with computer controlled measurement system
6. Complete protection circuit to ensure the safety of personnel and equipment
7. Surge and transient protection sensitive electronic components
8. Particularly suited for tests requiring stable voltage even if the load changes under voltage (corona, wet & pollution tests) or when the load is inductive (inductive voltage transformers).

VII. General Technical data:

1. Mode of system test: PD Free AC Withstand Voltage Test Systems With Cylinder Type Transformer
2. System model : CQSB-500KVA/500KV
3. Input power supply : 380±10%(single-phase),50Hz/60Hz
4. Rated output capacity: 500kVA
5. Rated output Voltage: 500KV
6. Max Test voltage : no more than 500KV
7. Rated output current: 1.0A
8. Reg. Freq range : 50/60Hz
9. Output voltage waveform: pure sine wave
10. Temperature rise: Less than 65K under rated current working 60mints;
11. Noise level: No more than 65dB
12. Structure: oil-immersed with cylinder type designed

VIII. Other optional components

1. Power supply noise filter
2. Triple and fifth filter
3. Compensating reactor
4. Over-voltage electronic fast protection device
5. SF6 standard capacitor·
6. Partial discharge detector

IX. Other Typical Model

1.Single transformer type :

2.Stackable cylinder transformers type: