Gas circuit breaker and breaker for gas insulated switching device

Patent metadata

Field	Value
Publication number	US-9953778-B2
Application number	US-201715493795-A
Country	US
Kind code	B2
Filing date	Apr 21, 2017
Priority date	Apr 22, 2016
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A gas circuit breaker includes a breaking unit tank incorporating a fixed electrode and a movable electrode, a spring operation device including a breaking spring and a closing spring and configured to move the movable electrode, and a mechanism unit configured to couple the movable electrode side and the spring operation device side and transmit power received from the spring operation device to the movable electrode. The spring operation device is supported by a frame. The frame is fixed to a rear plate provided in a mechanism unit frame of the mechanism unit. A breaking spring case and a closing spring case of the spring operation device are fixed to pedestals via a plate member 38 and a support section 7.

First claim

What is claimed is:

1. A gas circuit breaker comprising:
a breaking unit tank incorporating a fixed electrode and a movable electrode;
a spring operation device including a breaking spring and a closing spring and configured to move the movable electrode, wherein
the breaking spring is housed in a breaking spring case,
the closing spring is housed in a closing spring case;
a mechanism unit configured to couple the movable electrode side and the spring operation device side and transmit power received from the spring operation device to the movable electrode;
a supporting member configured to support the spring operation device, such that
both the breaking spring case and the closing spring case are disposed between the supporting member and a fixing member; and
a vibration suppressing unit configured to suppress vibration of the spring operation device, wherein
the supporting member is provided in the mechanism unit.

2. The gas circuit breaker according to claim 1 , further comprising a pedestal configured to support the breaking unit tank, wherein
the mechanism unit is provided at one end portion in a longitudinal direction of the breaking unit tank and supported by the breaking unit tank,
the spring operation device is provided on an opposite side of the breaking unit tank in the longitudinal direction of the breaking unit tank across the mechanism unit,
the pedestal extends to a vicinity of the spring operation device, and
the vibration suppressing unit is the fixing member configured to fix the spring operation device and the pedestal.

3. The gas circuit breaker according to claim 1 , wherein the breaking spring case is disposed on the mechanism unit side of the spring operation device.

4. The gas circuit breaker according to claim 2 , wherein a cover member that covers the vibration suppressing unit is provided.

5. The gas circuit breaker according to claim 1 , further comprising legs configured to support the pedestal under the pedestal.

6. A circuit breaker for a gas insulated switching device comprising:
a breaking unit tank incorporating a fixed electrode and a movable electrode;
a spring operation device including a breaking spring and a closing spring and configured to move the movable electrode, wherein
the breaking spring is housed in a breaking spring case,
the closing spring is housed in a closing spring case;
a mechanism unit configured to couple the movable electrode side and the spring operation device side and transmit power received from the spring operation device to the movable electrode;
a supporting member configured to support the spring operation device, such that
both the breaking spring case and the closing spring case are disposed between the supporting member and a fixing member; and
a vibration suppressing unit configured to suppress vibration of the spring operation device, wherein
the supporting member is provided in the mechanism unit.

7. The circuit breaker for the gas insulated switching device according to claim 6 , further comprising a pedestal configured to support the breaking unit tank, wherein
the mechanism unit is provided at one end portion in a longitudinal direction of the breaking unit tank,
the spring operation device is provided on an opposite side of the breaking unit tank in the longitudinal direction of the breaking unit tank across the mechanism unit,
the pedestal extends to a vicinity of the spring operation device, and
the vibration suppressing unit is the fixing member configured to fix the spring operation device and the pedestal.

8. The circuit breaker for the gas insulated switching device according to claim 7 , wherein the breaking spring case is disposed on the mechanism unit side of the spring operation device.

9. The circuit breaker for the gas insulated switching device according to claim 7 , wherein
the spring operation device includes a closing spring case configured to house the closing spring,
the fixing member fixes the closing spring case and the pedestal, and
lower ends of the breaking spring case and the closing spring case are located further on an upper side than a lower end of the pedestal.

10. The circuit breaker for the gas insulated switching device according to claim 6 , wherein a cover member that covers the vibration suppressing unit is provided.

Assignees

• Hitachi Ltd
• Hitachi Ltd

Inventors

• Hashimoto Hiroaki
• Iida Takashi
• Mori Shunta
• Okubo Kenichi

Classifications

• H01H3/60 Primary

  Mechanical arrangements for preventing or damping vibration or shock · CPC title

• H01H33/64 Primary

  wherein the break is in gas (vacuum switches H01H33/66) · CPC title

• H01H2235/01

  Spiral spring · CPC title

• H01H33/565

  Gas-tight sealings for moving parts penetrating into the reservoir · CPC title

• H01H33/40

  using spring motor · CPC title