The present invention provides a frequency converter maintenance test
system, and belongs to the frequency converter maintenance test technology field. The
system comprises dry type transformers TC1 and TC2, and frequency converter test control cabinets G1 and G2. The tap of the dry type
transformer TC1 is regulated to perform conversion output of input power to the frequency converter test control cabinets G1 and G2, the dry type transformers TC1 employs a self-
coupling mode to output
voltage, the frequency converter test control cabinets G1 and G2 provide various types of power supplies of the frequency converter test and provide protective measures in the frequency converter maintenance test process, and the dry type
transformer TC2 supplies heavy
current load for the frequency converter and supplies low-frequency heavy
current load basis. The frequency converter maintenance test
system solves the problems that multi-input power supply, direct-
current source and
control power in the low, medium and
high voltage frequency converter debugging are difficult to obtain and cannot perform heavy
current load test; only one set of the system can satisfy the frequency converter test requirement of each
voltage grade, and the frequency converter maintenance test system is suitable for low-frequency debugging test of a high-
power frequency converter having heavy current load with limited test condition, and small in
energy consumption and saved in energy.