Patent ID: 8199445
Filing Date: 2012-06-12
Classification: H01H

Abstract:
1. A gas insulated circuit breaker system comprising: a container that encapsulates an insulating gas; a main contact that is contained in the container and opens and closes a main circuit; a resistor contact that is contained in the container, connected in parallel to the main contact, and configured to be opened after elapse of a predetermined time after the main contact is opened and to be closed at a predetermined time before the main contact is closed; a resistor that is contained in the container, serially connected to the resistor contact, and connected in parallel to the main contact together with the resistor contact; a temperature sensor that measures a temperature of surrounding of the resistor; and a temperature estimation section that estimates a temperature of the resistor based on a contact signal representing a timing of opening and closing operation of the main contact, a current signal representing a current flowing through the main circuit, and a temperature signal output from the temperature sensor.