Medium voltage switching apparatus

Patent metadata

Field	Value
Publication number	US-10832881-B2
Application number	US-201816483496-A
Country	US
Kind code	B2
Filing date	Jan 15, 2018
Priority date	Feb 3, 2017
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A switching apparatus for medium voltage electric systems, the switching apparatus including one or more electric poles, each electrically coupleable with a corresponding electric line, the switching apparatus including: for each electric pole, a fixed contact and a corresponding movable contact, the movable contact being reversibly movable, along a corresponding translational displacement axis, between a decoupled position from the fixed contact and a coupled position with the fixed contact; an actuation assembly having, for each electric pole, an actuation shaft rotating about a rotation axis during a closing manoeuvre or an opening manoeuvre of the switching apparatus; for each electric pole, a motion transmission assembly including an eccentric mechanism operatively coupled with the actuation shaft.

First claim

The invention claimed is:

1. A switching apparatus for medium voltage electric systems, said apparatus comprising one or more electric poles, each electrically coupleable with a corresponding electric line, said switching apparatus comprising:
for each electric pole, a fixed contact and a corresponding movable contact, said movable contact being reversibly movable, along a corresponding translational displacement axis, between a decoupled position from said fixed contact and a coupled position with said fixed contact, said movable contact moving from said decoupled position to said coupled position during a closing manoeuvre of said switching apparatus, said movable contact moving from said coupled position to said decoupled position during an opening manoeuvre of said switching apparatus;
an actuation assembly having, for each electric pole, an actuation shaft rotating about a rotation axis during the closing manoeuvre or the opening manoeuvre of said switching apparatus;
for each electric pole, a motion transmission assembly including:
an eccentric mechanism operatively coupled with said actuation shaft, said eccentric mechanism being actuated by rotational mechanical forces provided by said actuation shaft to actuate said movable contact during the closing manoeuvre or the opening manoeuvre of said switching apparatus;
a transmission mechanism operatively coupled with said eccentric mechanism and with said movable contact, said motion transmission assembly being actuated by translational mechanical forces provided by said eccentric mechanism to actuate said movable contact during the closing manoeuvre or the opening manoeuvre of said switching apparatus;
wherein said eccentric mechanism is movable between a first end-of-run position, at which said movable contact is decoupled from said fixed contact, and a second end-of-run position, at which said movable contact is coupled to said fixed contact, during the opening manoeuvre or the closing manoeuvre of said switching apparatus,
wherein said eccentric mechanism reaches said first end-of-run position at an end of the opening manoeuvre of said switching apparatus and stably maintains said first end-of-run position until the closing manoeuvre of said switching apparatus is carried out,
wherein said eccentric mechanism reaches said second end-of-run position at another end of the closing manoeuvre of said switching apparatus and stably maintains said second end-of-run position until the opening manoeuvre of said switching apparatus is carried out, and
wherein said eccentric mechanism comprises an end-of-run element in a fixed position, said end-of-run element preventing the eccentric mechanism from rotating in one direction in said first end-of-run position or said second end-of-run position, said eccentric mechanism thereby rotating in opposite directions during the opening manoeuvre and the closing manoeuvre.

2. The switching apparatus, according to claim 1 , wherein during the opening manoeuvre or the closing manoeuvre of said switching apparatus, said eccentric mechanism passes through a first deadlock position, at which said movable contact is decoupled from said fixed contact and reaches a point of a maximum distance from said fixed contact.

3. The switching apparatus, according to claim 2 , wherein during the opening manoeuvre or the closing manoeuvre of said switching apparatus, said eccentric mechanism passes through a second deadlock position, at which said movable contact is coupled with said fixed contact and a contact spring of said transmission mechanism, operatively coupled with said movable contact, stores a maximum amount of elastic energy.

4. The switching apparatus, according to claim 2 , wherein during the closing manoeuvre of said switching apparatus, said eccentric mechanism leaves said first end-of-run position, at which said movable contact is decoupled from said fixed contact and is spaced from said fixed contact of a distance shorter than said maximum distance, passes through said first deadlock position, passes through a second deadlock position and reaches said second end-of-run position, at which said movable contact is coupled with said fixed contact and a contact spring stores an amount of elastic energy lower than a maximum amount of elastic energy.

5. The switching apparatus, according to claim 2 , wherein during the opening manoeuvre of said switching apparatus, said eccentric mechanism leaves said second end-of-run position, at which said movable contact is coupled with said fixed contact and a contact spring stores an amount of elastic energy lower than a maximum amount of elastic energy, passes through a second deadlock position, passes through said first deadlock position and reaches said first end-of-run position, at which said movable contact is decoupled from said fixed contact and is spaced from said fixed contact of a distance shorter than said maximum distance.

6. The switching apparatus, according to claim 1 , wherein during the opening manoeuvre or the closing manoeuvre of said switching apparatus, said eccentric mechanism passes through a second deadlock position, at which said movable contact is coupled with said fixed contact and a contact spring of said transmission mechanism, operatively coupled with said movable contact, stores a maximum amount of elastic energy.

7. The switching apparatus, according to claim 6 , wherein during the closing manoeuvre of said switching apparatus, said eccentric mechanism leaves said first end-of-run position, at which said movable contact is decoupled from said fixed contact and is spaced from said fixed contact of a distance shorter than a maximum distance, passes through a first deadlock position, passes through said second deadlock position and reaches said second end-of-run position, at which said movable contact is coupled with said fixed contact and said contact spring stores an amount of elastic energy lower than said maximum amount of elastic energy.

8. The switching apparatus, according to claim 6 , wherein during the opening manoeuvre of said switching apparatus, said eccentric mechanism leaves said second end-of-run position, at which said movable contact is coupled with said fixed contact and said contact spring stores an amount of elastic energy lower than said maximum amount of elastic energy, passes through said second deadlock position, passes through a first deadlock position and reaches said first end-of-run position, at which said movable contact is decoupled from said fixed contact and is spaced from said fixed contact of a distance shorter than a maximum distance.

9. The switching apparatus, according to claim 1 , wherein during the closing manoeuvre of said switching apparatus, said eccentric mechanism leaves said first end-of-run position, at which said movable contact is decoupled from said fixed contact and is spaced from said fixed contact of a distance shorter than a maximum distance, passes through a first deadlock position, passes through a second deadlock position and reaches said second end-of-run position, at which said movable contact is coupled with said fixed contact and a contact spring stores an amount of elastic energy lower than a maximum amount of elastic energy.

10. The switching apparatus, according to claim 1 , wherein during the opening manoeuvre of said switching apparatus, said eccentric mechanism leaves said second end-of-run position, at which said movable contact is coupled with said fixed contact and a contact spring stores an amount of elastic energy lower than a maximum amount of elastic energy, passes through a second deadlock position, passes through a first deadlock position and reaches said first end-of-run position, at which said movable contac

Assignees

• Abb Schweiz Ag

Inventors

• Boffelli Carlo
• Jonsson Lars E
• Halén Stefan

Classifications

• H01H33/666 Primary

  Operating arrangements · CPC title

• H01H3/42

  using cam or eccentric · CPC title

• H01H3/26

  using dynamo-electric motor (for storing energy in a spring motor H01H3/30) · CPC title

• H01H2033/66246

  Details relating to the guiding of the contact rod in vacuum switch belows · CPC title