On-load multistage controllable-capacity tap switch

• Main Authors: ZHAO YUEXIN, ZOU PENG, LUAN DALI, JIA JIYING
• Format: Patent
• Language: Chinese; English
• Published: 17.04.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; INDUCTANCES; MAGNETS; RELAYS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SELECTORS; TRANSFORMERS

The utility model provides an on-load multistage controllable-capacity tap switch which settles a problem that the prior-art on-load switch can not adjust more than three capacities. The on-load multistage controllable-capacity tap switch is characterized in that: the transformer capacity is changed when numbers of turns of high-voltage coil and low-voltage coil of a transformer winding are changed simultaneously; and therefore three sets of low-voltage moving contact and a set of low-voltage leading-out neutral point moving contact in a low-voltage moving contact system are connected through a low-voltage conductive rod; the low-voltage leading-out neutral point moving contact is equipped on an insulating rotating shaft; a low-voltage static-contact system of each phase is composed of N low-voltage static contacts; and a high-voltage static-contact system of each phase is composed of N high-voltage static contacts. When an insulating rotating shaft rotates, all moving contacts rotate synchronously and are sw