TAP VOLTAGE CHANGER WITH MONITORING DEVICES SWITCHING LOAD DIVERTER SWITCH

摘要

The busiest and most important unit of the tap voltage changer is load diverter switch. In control tests on tap is lifted oscillogram of the consistent action of a contact system of the load diverterswitch. Such an oscillogram can be done during the operation, when the transformer is switch off and provide access to load diverter switch. This leads to losses. Oscillography during the operation of the transformer and control the end position of the load diverter switch is in the following way: to a driving star (24) of the contact system (9) catches a vertical insulating shaft (25) with insulated lever (26) on its top. At the end of the insulator lever (26) of a permanent magnet (27) and a bearing head (12) is mounted an insulating arc (28), on which at certain angles, according to the structure of the load diverter switch, there are Hall sensors. Between the magnet (27) and the sensors has a small gap. Upon rotation of the driving star (24) and shaft (25) the magnet (27) passes alternately along the Hall sensors. Two end sensors (29 and 33) control the extreme positions of the contact system (9), and three middle sensors (30, 31 and 32) recorded oscillogram. The terminals from the sensors come as the sheaf (35) and go to the logical electronic device. May also be used embodiment with the encoder (36).