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
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Application
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Main configuration
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Variable frequency power, 1 set
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Exciting transformer 1 set
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Resonant reactors
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ZXZ-108/54/108
Test frequency:
45~300Hz
|
Transformers, 35kV, 31.5MVa
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5kW
|
5kVA
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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
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110kVA circuit breakers, busbar
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10kW
|
10kVA
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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
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110kV circuit breaker, busbar
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25kW
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25kVA
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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
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220kVA voltage transformer and current transformer
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20kW
|
20kVA
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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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