Shanghai Demiks Power Technology Co., Ltd. has finished delivery, on-site commissioning and operator training of a full set of high voltage test instruments for Hunan Changgao Senyuan Electric Equipment Co., Ltd. The supplied equipment includes switch-gear power-on test bench, high-current temperature rise test system, DC high voltage generator, power frequency withstand voltage test transformer system and transformer comprehensive tester. These testing instruments fully cover routine factory tests for high voltage switchgears, current transformers and voltage transformers.
Hunan Changgao Senyuan manufactures medium & high voltage switchgears, gas insulated RMUs, CT and PT instrument transformers. All electrical apparatus must pass strict insulation and performance tests before delivery. With Demiks complete high voltage testing solutions, Changgao Senyuan can carry out all core tests in-house, shorten delivery cycle and reduce third-party testing expenses.
Required Test Items & Matching High Voltage Test Equipment
1. High Voltage Switchgear (MV switchgear, Ring Main Unit)
Switchgear Power-on Test for Secondary Circuit Equipment: HV Switchgear Power-on Test Bench Function: Verify secondary control circuit, circuit breaker switching operation, mechanical interlock and five-prevention interlock logic; eliminate wiring faults and mechanism failures. Mandatory routine test before factory shipment.
Power Frequency AC Withstand Voltage Test Equipment: Power Frequency Withstand Voltage Transformer System Function: Apply AC high voltage to main circuit to check insulation strength between phases and to earth, detect insulation defects of busbars, insulators and enclosures.
Temperature Rise Test Equipment: High Current Temperature Rise Test System Function: Inject rated continuous current into primary circuit, monitor temperature of contacts and bus connections to avoid overheating during long-term operation.
Partial Discharge Test (Type Test Option) Matched with PD shielding room and partial discharge test system, detect internal defects of gas tank and solid insulation synchronously during AC withstand voltage test.
2. Instrument Transformers (CT & PT)
Transformer Comprehensive Characteristic Test Equipment: CT PT Comprehensive Tester Function: Test transformation ratio, polarity, winding resistance, excitation curve to guarantee measurement & protection accuracy.
DC Withstand Voltage & Leakage Current Test Equipment: DC High Voltage Generator Function: Detect insulation dampness and internal cracks by measuring leakage current under DC high voltage.
Power Frequency Withstand Voltage Test Equipment: Power Frequency HV Test Transformer System Verify insulation between primary winding, secondary winding and earth, complying with IEC & GB standards for instrument transformers.
Introduction of Core Test Equipment
HV Switchgear Power-on Test Bench Integrated power supply and control unit for secondary circuit simulation test of medium voltage switchgear and RMU, realize automatic switching and interlock function verification efficiently.
- High Current Temperature Rise Test SystemAdjustable three-phase constant current source with multi-channel temperature acquisition module, meeting GB/T 11022 temperature rise test standard for high voltage switchgear assemblies.
- Power Frequency Withstand Voltage Transformer SystemConsists of testing transformer, intelligent control console, protective resistor and voltage divider, widely used for AC hipot test of switchgears, transformers, cables and insulators. Partial discharge free version is optional.
- Portable DC High Voltage GeneratorApplied to DC withstand voltage and leakage current measurement of transformers, surge arresters and power cables, equipped with complete safety protection.
- CT PT Comprehensive TesterAll-in-one testing device for instrument transformers, automatically record test data and generate formal test reports, suitable for mass production inspection.
About Demiks Power
Shanghai Demiks Power Technology Co., Ltd. develops and manufactures high voltage testing equipment, including partial discharge detection system, PD shielding room EPC project, AC withstand voltage test set, DC high voltage generator, temperature rise test system, series resonance test equipment and lightning impulse test system. We provide one-stop high voltage laboratory solutions for high voltage equipment manufacturers and power testing institutions.
