I Description
This variable-frequency series-resonant voltage withstand test equipment is comprised of frequency power, exciting transformer, reactors and voltage divider, for testing different electric apparatus:
l AC voltage withstand test for 6kV-500kV HV crosslinked cables
l AC voltage withstand test for various kind of generators
l AC voltage withstand test for 10-500kV switchgears, GIS and SF6 switches
l Power-frequency voltage withstand test for 6kV-500kV transformers
l AC voltage withstand test for other HV electric apparatus such as bushings, instrument transformers and busbars
II Main features
l Touch screen operation, simple and convenient
l Automatic scanning frequency, finding resonance point, frequency range 20-300Hz; max. duration for scanning 3minutes (full range); frequency resolution ratio 0.1Hz
l Automatic testing, programmable
l Under automation, automatic following system resonant condition; When resonant condition changes and exceeds pre-set range, system can automatic follows resonance point; Assures the system under best condition and draws frequency-voltage curve when frequency varies.
l Automatic follows voltage; When voltage fluctuates normally, automatically adjust to target voltage
l Full-voltage output protection: strictly avoid the frequency power never full-voltage output during regulating
l Software is safe, stable and reliable, being strictly simulation run tested.
l Automatically save test data; old test data can be inquired by conditions
l LCD displaying power voltage and current and output frequency, voltage & current
l Protection functions: over-current, over-voltage, power failure and flashover protections
III Configuration & application
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Code |
Application |
Main configuration |
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Variable frequency power, 1 set |
Exciting transformer 1 set |
Resonant reactors |
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ZXZ-108/54/108 Test frequency: 45~300Hz |
Transformers, 35kV, 31.5MVa |
5kW |
5kVA |
27kV/1A, frequency≥45Hz 4 sets |
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35kVA circuit breakers, busbar and insulators |
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10kV cable 300mm2, 2000m long |
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35kV cable 300mm2, 500m long |
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ZXZ-216/108/216 Test frequency: 45~300Hz |
110kVA circuit breakers, busbar |
10kW |
10kVA |
54kV/1A frequency≥45Hz 4 sets |
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110kVA GIS |
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35kV cable 300mm2, 1500m long |
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10kV cable 300mm2, 3000m long |
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110kV full insulated transformer |
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ZXZ-520/130/260 Test frequency: 45~300Hz |
110kV circuit breaker, busbar |
25kW |
25kVA |
65kV/2A frequency≥45Hz 4 sets |
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110kVA GIS |
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110kV cable 300mm2, 800m long |
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35kV cable 300mm2, 3000m long |
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10kV cable 300mm2, 6000m long |
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110kV full insulated transformer |
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ZXZ-500/250/500 Test frequency: 45~65Hz |
220kVA voltage transformer and current transformer |
20kW |
20kVA |
125kV/1A frequency≥45Hz 4 sets |
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220kVA bushings |
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220kVA post insulator, isolating switch |
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220kV circuit breaker |
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220kV insulating tools |
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