Resistor-provided UHV breaker having delaying/operating mechanism for making and breaking main contacts and resistor contacts

A resistor-provided UHV breaker comprising:

• a tank sealing an insulating gas therein
• a main contact unit located in the tank and consisting of a pair of main contacts to be made and broke;
• a resistor unit located in the tank and connected parallel to the main contact unit, respectively;
• a resistor contact unit located in the tank and interposed between the main contact unit and the resistor unit, the contact unit consisting of a pair of resistor contacts being made and broke;
• a main contact link mechanism located in the tank for supplying the main contact link mechanism with a driving force to make and break the main contacts;
• a resistor contact link mechanism located in the tank for making and breaking the resistor contacts;
• a resistor contact operation mechanism located outside the tank for supplying the resistor contact link mechanism with a driving force to make and break the resistor contacts;
• a coupling mechanism having one end coupled with the main contact link mechanism and another end coupled with the resistor contact link mechanism, for coupling the main contact link mechanism with the resistor contact link mechanism, the coupling mechanism driving the main contact link mechanism together with the resistor contact link mechanism during making operation of the main contacts, while driving the main contact link mechanism and the resistor contact link mechanism, independently, during breaking operation of the main contacts;
• a delaying mechanism for starting to break the resistor contacts at a predetermined delay time after the main contacts are broke;
• and
• an advancing mechanism for starting to make the resistor contacts at a predetermined precedent time before the main contacts is made.