SF6-Gas-insulated HVAC Test Systems for metal-clad switchgear/transmission Line（GIS/GIL)
Applications:
SF6 insulated test transformers are especially designed for testing metal-clad switchgear(GIS) ，Gas-insulated Metal Enclosed Transmission Line（GIL) in the factory and on-site,and for testing on-site substation equipment.The conventional transformers can be flanged directly to the GIS/GIL.This makes testing of such GIS installations possible without feeding them through an air-SF6 bushing.Therefore,the merits of the encapsulation remains effective also during the testing which is of importance for Partial-Discharge tests.These systems are particularly suited for on-site tests of GIS/GIL after assembly.In the factory,they allow to test sub-assemblies and components directly in the manufacturing line,thus avoiding transportation to a central test facility,and extra handling.
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Profile:
SF6 insulated test transformers are especially designed for testing metal-clad switchgear(GIS), Gas-insulated Metal Enclosed Transmission Line（GIL) in the factory and on-site,and for testing on-site substation equipment.The conventional transformers can be flanged directly to the GIS.This makes testing of such GIS/GIL installations possible without feeding them through an air-SF6 bushing.Therefore,the merits of the encapsulation remains effective also during the testing which is of importance for Partial-Discharge tests.These systems are particularly suited for on-site tests of GIS after assembly.In the factory,they allow to test sub-assemblies and components directly in the manufacturing line,thus avoiding transportation to a central test facility,and extra handling.
Features:
- High voltage is fully sealed in a shielded space,ensuring safe and reliable experiments.
- The overall partial discharge can be controlled within 1-3 pc.
- It has a small volume,occupying the minimum space and lightweight components.
- Built-in high voltage isolation switch enables multi-purpose use.
- Easy to connect,directly connected to the test sample,making experiments more convenient.
- Capable of withstanding long-distance transportation with a sturdy and durable structure.
- Reduced requirements for system power capacity.
Parameter:
system components:
- Regulating transformer
- Power line filter
- Compensating reactor
- Low voltage protection unit (included in systems rated 510 kV or higher)
- Test transformer
- Control system for factory tests
- Regulating cubicle with control panel for on-site tests
- Encapsulated coupling capacitor
- SF6-air bushing and various connection or adaptation flanges between test
- transformer & bushing & coupling capacitor & test object.
- Specific base frames or containers for on-site testing.
- Encapsulated standard capacitor
- Control system
- HV and grounding connections if bushing is used. The connection to test object is usually not included.
- Partial Discharge detectors
- Capacitance and power loss factor measuring bridges
- Other devices upon request.
- Voltage levels:100kV,200kV,250kV,300kV,500kV,800kV,1000kV.
- Capacity:50-2000kVA
- Methods of high voltage generation:High voltage transformer boosting and series resonance(power frequency,variable frequency),all boosting methods are single-stage boosting without cascade boosting.
- Input voltage(primary voltage):0.35-10kV
- Partial discharge amount of equipment:1-3 pc under rated voltage(normal environment)
- Temperature rise:The temperature rise does not exceed 65k when the rated current operates for 60 minutes(50Hz).
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