PD-free variable frequency resonance

800KV PD-free variable frequency resonance

Induced over Voltage Withstand and PD Test System of Large Power Equipment

Range of application:Applicable to induced over voltage withstand and PD test of large power transformer Applicable to the delivery test of induced over voltage withstand and PD of transformer, CT, PT etc. in power equipment manufactory Also compatible with AC voltage withstand test of power equipment in substation Also compatible with AC induced over voltage withstand test of CT and PT Successful cases on AC voltage withstand test of large-size power equipment by this system:Induced over voltage withstand test of 220KV main transformer in Gongo power station of 14th bureau of China hydropower Induced over voltage withstand test of main transformer in Lai Bing Mo Dong 220KV substation, which is undertaken by Bo Yang electric power construction company, Guangxi Main configuration of the system:Variable frequency push-pull test power supply     1 set (capacity as peractual programme) Excitation transformer     1 set (capacity as per actual programme) Compensating reactor     several (configured as per requirement, alternative) HV voltage withstand reactor     several (configured as per voltage grade of power equipment, alternative) HV capacitive voltage divider     2 sets PD tester     1 set Parameters must be fixed prior to the selection of specification:Transformer capacity and voltage grade No-load loss of transformer Ground winding capacity of transformer

PD-free variable frequency resonance