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Invention Patent

Invention, utility model and appearance patent certificates.

Invention patent

A distribution transformer on-load tap-changer 14cy
A distribution transformer on-load tap-changer 29tc
Air core reactor tap changernvl
On-load capacity regulating switch contact assemblypql
On-load multi-stage capacity-adjusting tap-changero85
Single-break on-load capacity switchswu
Strip type non-excited tap changer with gear positioning5s9
Transformer on load capacity and voltage regulation tap changerlcd
0102030405

Utility model patent certificate

A disk-type tap-changer with rolling contacts 1s94
A disk-type tap-changer with rolling contacts 2xw6
An on-load capacity-adjusting tap-changeryer
An on-load tap-changer59u
Arc-shaped deenergized tap-changeroqp
Off-circuit tap-changer with gear position sensorzvf
Roller mechanism on tap changer81p
01020304