EP3594982A1 - Sectionneur de terre triphasé - Google Patents

Sectionneur de terre triphasé Download PDF

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Publication number
EP3594982A1
EP3594982A1 EP18183234.6A EP18183234A EP3594982A1 EP 3594982 A1 EP3594982 A1 EP 3594982A1 EP 18183234 A EP18183234 A EP 18183234A EP 3594982 A1 EP3594982 A1 EP 3594982A1
Authority
EP
European Patent Office
Prior art keywords
connectors
earthing switch
base unit
phase earthing
mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP18183234.6A
Other languages
German (de)
English (en)
Inventor
Josef Cernohous
Pavel Hemek
David Rumler
Emil Kalina
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP18183234.6A priority Critical patent/EP3594982A1/fr
Priority to CN201921072131.5U priority patent/CN211150399U/zh
Publication of EP3594982A1 publication Critical patent/EP3594982A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H2003/323—Driving mechanisms, i.e. for transmitting driving force to the contacts the mechanisms being adjustable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact

Definitions

  • the present invention relates to a three phase earthing switch and to a method for providing a three phase earthing switch.
  • An earthing switch is an important device in a medium voltage switchgear.
  • the role of the earthing switch is to safely interconnect working conductors to earth potential in order that it is safe to operate and/or work closely to these conductors in what can be restricted surroundings. There is however a need to improve performance, reduce cost, and at the same time reduce complexity of earthing switches.
  • a three phase earthing switch comprising:
  • the at least one base unit is configured to hold the three connectors.
  • a first distil end of each of the three connectors is configured to rotate with respect to the at least one base unit.
  • a second distil end of each of the three connectors comprises a contact knife.
  • the three earth contacts are configured to be mounted at three locations that are mechanically independent from and spaced from the at least one base unit. In a first mode of operation of the three phase earthing switch the three connectors are not in contact with the three earth contacts. In a second mode of operation of the three phase earthing switch the three connectors are moved such that the three contact knifes are in contact with the three earth contacts.
  • the three locations of the earth contacts are adjustable to vary the spacing from the at least one base unit.
  • fixation points are freely adjustable in their distance from the at least one base unit.
  • each of the three earth contacts has a recess configured to receive a contact knife of a connector.
  • the at least one base unit is formed from three base units, wherein each connector is held by and configured to rotate with respect to a corresponding base unit.
  • the three connectors are electrically connected to each other, and the three base units are configured to be mounted at three locations spaced from each other.
  • At least two of the three base units are configured such that locations of two of the three base units are adjustable to vary the spacing between the three base units.
  • a first exchangeable interconnecting bar is configured to electrically connect a first one of the three base units to a second one of the three base units
  • a second exchangeable interconnecting bar is configured to electrically connect the second one of the three base units to a third one of the three base units.
  • the interconnecting bars can be changed to ones of the correct length.
  • the three phase earthing switch has an exchangeable shaft that is held by the at least one base unit.
  • the shaft can be changed to one of the correct length.
  • the shaft is fixedly held by the at least one base unit, and wherein the three connectors are configured to rotate with respect to the shaft.
  • the shaft is configured to rotate with respect to the at least one base unit, and wherein the three connectors are fixedly connected to the shaft.
  • a position indicator associated with the shaft is configured to indicate when the three phase earthing switch is in a position associated with the second mode of operation.
  • the earthing switch comprises movement limiting means.
  • the movement limiting means comprises at least one movement stopper fixedly attached to the at least one base unit, and comprises at least one movement limiting component fixedly attached to at least one of the three connectors. In a transition from the first mode of operation to the second mode of operation at least a first part of the at least one movement limiting component is moved toward the at least one movement stopper.
  • the at least first part of the at least one movement limiting component is configured to be in contact with the movement stopper.
  • At least a second part of the at least one movement limiting component is moved toward the at least one movement stopper.
  • the at least second part of the at least one movement limiting component is configured to be in contact with the movement stopper.
  • the three phase earthing switch comprises at least one spring. Activation of the at least one spring is configured to transition the three phase earthing switch from the first mode of operation to the second mode of operation.
  • a first end of the at least one spring is connected to the at least one base unit and configured to rotate with respect to the at least one base unit.
  • a second end of the at least one spring is configured to interact with at least one of the three connectors to rotate the three connectors.
  • a method of providing a three phase earthing switch comprising:
  • Fig. 1 shows an example of a three phase earthing switch 50, where optional features are shown in dashed form.
  • the three phase earthing switch comprises at least one base unit 1, three connectors 4, and three earth contacts 12.
  • the at least one base unit is configured to hold the three connectors.
  • a first distil end each of the three connectors can rotate with respect to the at least one base unit.
  • a second distil end each of the three connectors comprises a contact knife.
  • the three earth contacts are mounted at three locations that are mechanically independent from and spaced from the at least one base unit. In a first mode of operation, the three connectors are not in contact with the three earth contacts. In a second mode of operation, the three connectors are moved such that the three contact knifes are in contact with the three earth contacts.
  • At least one earthing wire 7 is electrically connected to at least one of the connectors.
  • the three earth contacts when mounted at the three locations are not in electrical connection with the at least one base unit.
  • the earth contacts are fixed on fixation points, which are mechanically and statically independent from the at least one base unit.
  • the three locations of the earth contacts are adjustable to vary the spacing from the at least one base unit.
  • each of the three earth contacts has a recess configured to receive a contact knife of a connector.
  • the at least one base unit is formed from three base units, Each connector is held by and can rotate with respect to a corresponding base unit.
  • the three connectors are electrically connected to each other.
  • the three base units are mounted at three locations spaced from each other.
  • each connector is fixedly attached to a moving contact holder 5.
  • Each of the three moving contact holders is configured to rotate with respect to a corresponding base unit.
  • each base unit comprises two bent pieces of metal 11.
  • At least two locations of two of the three base units are adjustable to vary the spacing between the three base units.
  • a first exchangeable interconnecting bar 6 electrically connects a first one of the three base units to a second one of the three base units.
  • a second exchangeable interconnecting bar 6 electrically connects the second one of the three base units to a third one of the three base units.
  • the three phase earthing switch comprises an exchangeable shaft 2 that is held by the at least one base unit.
  • the shaft is fixedly held by the at least one base unit, and wherein the three connectors are configured to rotate with respect to the shaft.
  • the shaft is configured to rotate with respect to the at least one base unit, and wherein the three connectors are fixedly connected to the shaft.
  • a position indicator 8 associated with the shaft is configured to indicate when the three phase earthing switch is in a position associated with the second mode of operation.
  • the position indicator is configured to indicate when the three phase earth switch is in a position associated with the first mode of operation.
  • the earthing switch comprises movement limiting means 3 and 10.
  • the movement limiting means comprises at least one movement stopper 10 fixedly attached to the at least one base unit, and comprises at least one movement limiting component 3 fixedly attached to at least one of the three connectors. In a transition from the first mode of operation to the second mode of operation at least a first part of the at least one movement limiting component 3 is moved toward the at least one movement stopper 10.
  • the at least first part of the at least one movement limiting component 3 is configured to be in contact with the movement stopper 10.
  • At least a second part of the at least one movement limiting component 3 is moved toward the at least one movement stopper 10.
  • the at least second part of the at least one movement limiting component 3 is configured to be in contact with the movement stopper 10.
  • the three phase earthing switch comprises at least one spring 9. Activation of the at least one spring is configured to transition the three phase earthing switch from the first mode of operation to the second mode of operation.
  • a first end of the at least one spring is connected to the at least one base unit and configured to rotate with respect to the at least one base unit.
  • a second end of the at least one spring is configured to interact with at least one of the three connectors to rotate the three connectors.
  • Fig. 2 shows a method 100 of providing a three phase earthing switch in its basic steps.
  • the method 100 comprises:
  • the three locations of the earth contacts are adjustable to vary the spacing from the at least one base unit.
  • each of the three earth contacts has a recess configured to receive a contact knife.
  • the at least one base unit is formed from three base units, wherein each connector is held by and configured to rotate with respect to a corresponding base unit.
  • the three connectors are in electrical connection with each other, and wherein the three base units are mounted at three locations spaced from each other.
  • At least two locations of two of the three base units are adjustable to vary the spacing between the three base units.
  • a first exchangeable interconnecting bar is electrically connects a first one of the three base units to a second one of the three base units, and wherein a second exchangeable interconnecting bar electrically connects the second one of the three base units to a third one of the three base units.
  • the method comprises holding an exchangeable shaft by the at least one base unit.
  • the method comprises fixedly holding the shaft by the at least one base unit, and wherein the three connectors can rotate with respect to the shaft.
  • the method comprises movably holding the shaft by the at least one base unit, where the shaft can rotate with respect to the at least one base unit, and fixedly connecting the three connectors to the shaft.
  • the method comprises using a position indicator associated with the shaft to indicate when the three phase earthing switch is in the second mode of operation.
  • the method comprises using movement limiting means.
  • using the movement limiting means comprises fixedly attaching at least one movement stopper to the at least one base unit, and comprises fixedly attaching at least one movement limiting component to at least one of the three connectors. In transitioning from the first mode of operation to the second mode of operation at least a first part of the at least one movement limiting component moves toward the at least one movement stopper.
  • the at least first part of the at least one movement limiting component comes into contact with the movement stopper.
  • At least a second part of the at least one movement limiting component moves toward the at least one movement stopper.
  • the at least second part of the at least one movement limiting component is in contact with the movement stopper.
  • a first end of the at least one spring is connected to the at least one base unit and can rotate with respect to the at least one base unit. Activation of the at least one spring causes a second end of the at least one spring to interact with at least one of the three connectors to rotate the three connectors.
  • Fig. 3 shows a detailed example of a three phase earthing switch 50, with Figs. 4 and 5 showing a base unit of the three base units, where moving parts are shown in Fig. 5 .
  • the three phase earthing switch has three base units 1, made of bent sheet metal angles 11. The distance between the base units can be selected as necessary.
  • the base units hold the moving parts of the three phase earthing switch.
  • the moving parts are comprised of a shaft 2, movement limiting components 3, an moving contacts (knives 4), moving contact holders 5, interconnecting bars 6, and earthing wires 7.
  • the shaft and interconnecting bars have lengths that are given by the distance between the base units (phase pitch).
  • the interconnecting bars and moving contacts (knives) are made from copper and have a flat profile.
  • a position indicator 8 is mounted on the shaft.
  • the moving parts are driven by a set of springs 9, in order that appropriate closing force and speed is achieved.
  • the end positions are set by the movement stopper 10 working in conjunction with the movement limiting components 3, shown in more detail in Fig. 6 below.
  • Fig. 6 shows the movement limitation principle of the three phase earthing switch, with the earthing switch shown in an open state on the left and in a closed state on the right.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP18183234.6A 2018-07-12 2018-07-12 Sectionneur de terre triphasé Pending EP3594982A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18183234.6A EP3594982A1 (fr) 2018-07-12 2018-07-12 Sectionneur de terre triphasé
CN201921072131.5U CN211150399U (zh) 2018-07-12 2019-07-10 一种三相接地开关

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18183234.6A EP3594982A1 (fr) 2018-07-12 2018-07-12 Sectionneur de terre triphasé

Publications (1)

Publication Number Publication Date
EP3594982A1 true EP3594982A1 (fr) 2020-01-15

Family

ID=62948049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18183234.6A Pending EP3594982A1 (fr) 2018-07-12 2018-07-12 Sectionneur de terre triphasé

Country Status (2)

Country Link
EP (1) EP3594982A1 (fr)
CN (1) CN211150399U (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820862A (en) * 1956-12-21 1958-01-21 Southern States Equipment Corp Electric switch
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
US20120300358A1 (en) * 2011-05-27 2012-11-29 Abb Technology Ag Grounding switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820862A (en) * 1956-12-21 1958-01-21 Southern States Equipment Corp Electric switch
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
US20120300358A1 (en) * 2011-05-27 2012-11-29 Abb Technology Ag Grounding switch

Also Published As

Publication number Publication date
CN211150399U (zh) 2020-07-31

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