Controller for electric power distribution apparatus
AssigneeHitachi, Ltd.
InventorToru Tanimizu
Life of this patent
Estimating the term…
Abstract
Object of the present invention is to provide a controller for distribution apparatus which prevents extension of power failure. In accordance with the controller for distribution apparatus related to the present invention, when a short circuit accident, for example, occurs in a control circuit for distribution apparatus, a breaker for distribution opens, an auxiliary coil becomes unexcited condition, and power failure is caused, but, an auxiliary contact point of the unexcited auxiliary coil closes in the other control circuit for distribution apparatus so as to excite a closing coil, and consequently, the other control circuit starts its operation immediately. Accordingly, extension of the power failure can be prevented and reliability of power supply can certainly be maintained.
Claims6
A controller for electric power distribution apparatus comprising:
- a control circuit for distribution apparatus having a breaker for distribution connected to a control bus bar;
- a closing control line and an auxiliary control line for connecting said controller and said distribution apparatus, said closing control line and said auxiliary control line being connected to said breaker for distribution;
- a closing coil for closing a second breaker which is connected to said closing control line;
- a closing contact point for exciting an auxiliary coil via said auxiliary control line by closing when the closing coil which is connected to said closing control line and said breaker for distribution is excited;
- and
- an auxiliary contact point which opens when said auxiliary coil is excited;
- wherein a plurality of said control circuit for distribution apparatus are connected to said control bus bar;
- and
- wherein the auxiliary contact point which opens when the auxiliary coil in one of said plurality of said control circuit for distribution apparatus is excited is connected to the closing control line of another one of said plurality of said control circuit for distribution apparatus.
Dependencies are inferred from the claim text.