WO2013164020A1 - Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés - Google Patents

Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés Download PDF

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Publication number
WO2013164020A1
WO2013164020A1 PCT/EP2012/058014 EP2012058014W WO2013164020A1 WO 2013164020 A1 WO2013164020 A1 WO 2013164020A1 EP 2012058014 W EP2012058014 W EP 2012058014W WO 2013164020 A1 WO2013164020 A1 WO 2013164020A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
auxiliary
carrier assembly
resilient member
assembly
Prior art date
Application number
PCT/EP2012/058014
Other languages
English (en)
Inventor
Chintamani Bivalkar
Sachin Kurkure
Noah Ramrajkar
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CN201290001159.XU priority Critical patent/CN204155862U/zh
Priority to PCT/EP2012/058014 priority patent/WO2013164020A1/fr
Publication of WO2013164020A1 publication Critical patent/WO2013164020A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/42—Impedances connected with contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices
    • H01H50/543—Auxiliary switch inserting resistor during closure of contactor

Definitions

  • the present invention generally relates to electrical
  • the present invention relates to an electrical switch assembly adapted for use with electrical loads prone to drawing high transient currents during
  • the present invention relates to an electrical switch assembly based on an auxiliary switch adapted for use in conjunction with a main switch such that a desired sequence of operating states of said main and said auxiliary switches is achieved during switching operations in a simple yet effective manner.
  • Electrical switches are employed to establish or interrupt an electrically-conductive path between an electrical supply and an electrical load.
  • a set of movable contacts is displaced relative to a set of stationary contacts to establish or interrupt an electrically-conductive path between supply-side and load-side stationary contacts.
  • the supply-side and load-side stationary contacts are
  • the set of movable contacts are configured to operate in two distinct operating states - namely, the open state and the closed state.
  • the set of movable contacts are
  • switching-on operation
  • the movable contacts are displaced from an open position to a closed position. This is referred to as
  • switching-off operation The switching-on and switching-off operations may be collectively referred to as Switching' operations.
  • the operation of the electrical switch subsequent to the switching-on operation and before initiation of the switching-off operation, wherein the movable contacts is stably in contact with corresponding pairs of stationary contacts, is referred to as a steady-state operation of the electrical switch.
  • An electrical switch is designed to conduct a rated
  • an electrical switch with a suitable electrical rating is selected based on an electrical rating of a particular electrical load required to be connected thereto .
  • an auxiliary switch is used in conjunction with a main switch to form a switch assembly.
  • the auxiliary switch is coupled to the main switch using suitable coupling means such that a movable carrier assembly supporting a set of movable contacts in the auxiliary switch is coupled to a movable carrier assembly supporting a set of movable contacts in the main switch.
  • the supply-side and load-side stationary contacts of the auxiliary switch are respectively connected to
  • the auxiliary switch returns to the open state after the main switch reaches the closed state during the switching-on operation such that only the transient current during the switching-on operation flows through the current-limiting resistors, while the transient current during the switching- off operation flows through the main switch.
  • One such switch assembly is known from EP 0 545 745 Bl .
  • the patent discloses a multi-pole switch device including at least one switch having at least one fixed contact member and a cooperating mobile contact member operated by a mobile assembly, and an operating member adapted to perform a forward and a return stroke to actuate the mobile assembly.
  • the operating member is coupled to the mobile assembly of the switch by a mechanical coupling including a disengageable coupling adapted to assume a disengaged position during the forward travel of the operating member when the resisting force exerted by the mobile assembly rises above a
  • the disengageable coupling is preferably implemented using magnetic coupling means.
  • One of the inherent disadvantages of using magnetic coupling means is reduced precision and reliability of operation due to manufacturing tolerances.
  • the magnetic coupling means in such switch assemblies are subjected to mechanical shocks during operation, which adversely impact corresponding magnetic properties.
  • Such electrical switch should provide sufficient ease of manufacturing and maintenance; and should provide benefit of low rates of field failures.
  • an object of the present invention is to provide an electrical switch assembly adapted for use with electrical loads prone to drawing high transient currents during
  • an electrical switch assembly comprises at least one housing and at least one carrier assembly.
  • the housing supports at least one pair of main stationary contacts and at least one pair of
  • the carrier assembly extends along a longitudinal axis and comprises at least a first portion and at least a second portion.
  • the first portion is configured for supporting at least one auxiliary movable contact.
  • the second portion is configured for supporting at least one main movable contact.
  • Each portion is displaceable along the longitudinal axis in a first direction and a second direction.
  • the second direction is substantially opposite to the first direction.
  • the first and the second portions of the carrier assembly are detachably coupled to each other.
  • One of said portions of the carrier assembly comprises a resilient member, wherein at least a portion of the resilient member is resiliently deformable substantially along a transverse axis.
  • the transverse axis is substantially perpendicular to the longitudinal axis.
  • the other of said portions comprises retaining means and triggering means .
  • the retaining means are configured for retaining the resilient member during a coupled state of the carrier assembly.
  • the triggering means are configured for deforming the resilient member to permit release thereof from the retaining means resulting in a decoupled state of the carrier assembly.
  • the present invention provides an electrical switch assembly based on a simple, efficient, and reliable design.
  • the electrical switch assembly is configured such that said main and the auxiliary movable contacts contact respective pair of stationary contacts in a desired sequence during a switching-on operation. Further, said auxiliary movable contacts are opened at the end of switching-on operation, thus, ensuring that said main movable contacts interrupt an electrically-conductive path between an electric supply and an electric load during a switching-off operation.
  • the present invention facilitates coupling and decoupling of different portions of the carrier assembly carrying the main and the auxiliary movable carriers in an effective and reliable manner to achieve a desired sequence of operating states of said main and said auxiliary switches during switching operations.
  • the retaining means comprise a cavity and a retaining seat.
  • the cavity is suitable for receiving the resilient member therein.
  • the resilient member comprises a mating shoulder suitable for engaging the retaining seat.
  • the resilient member is substantially U-shaped, and comprises a first leg and a second leg.
  • the first leg is rigidly coupled to said one portion.
  • the second leg comprises the mating shoulder and is elastically deformable relative to the first leg in a longitudinal plane containing the first and second legs .
  • the first and the second portions of the carrier assembly are configured to cooperate in a sliding manner along the longitudinal axis such that the carrier assembly transitions from the decoupled state to the coupled state. According to this technical feature, the carrier assembly achieves a coupled state at the end of switching-off
  • the electrical switch assembly becomes suitable to begin next set of switching-on and switching-off operations .
  • the triggering means comprise a trigger arm pivoted about a pivot axis located intermediate between a head-end and a tail-end thereof.
  • the pivot axis is
  • the tail-end is configured to engage a portion of the at least one housing while the carrier assembly is displaced along the first direction, such that the trigger arm rotates about the pivot axis and the head-end deforms the resilient member to permit release thereof from the retaining means, whereby the first portion becomes decoupled from the second portion.
  • the triggering means release the resilient member through
  • the electrical switch assembly further comprises biasing means coupled to the first portion.
  • the biasing means are configured to bias the first portion in the second direction, such that subsequent to the first portion becoming decoupled from the second portion, the carrier assembly transitions from the coupled state to the decoupled state.
  • the auxiliary movable contact returns to an open state after the main movable contact has effectively achieved a closed state.
  • the carrier assembly transitions from the coupled state to the decoupled state subsequent to contact between each of the movable contacts and corresponding pair of stationary contacts while the first and the second portions are displaced in the first direction. Further, the carrier assembly is configured to transition from the decoupled state to the coupled state while the second portion is displaced towards the first portion in the second direction. This technical feature facilitates achieving a desired sequence of operating states of said main and said auxiliary switches during switching operations.
  • an auxiliary switch is provided.
  • the auxiliary switch is suitable for being operationally coupled to a main switch.
  • the main switch comprises a main housing, which supports at least one pair of main stationary contacts.
  • the main switch further comprises a main carrier assembly, which extends along a longitudinal axis and is configured for supporting at least one main movable contact.
  • the auxiliary switch further comprises an auxiliary carrier assembly, which extends along a longitudinal axis, and comprises at least a first portion configured for supporting at least one auxiliary movable contact; and at least a second portion configured for coupling to the main carrier assembly.
  • Each portion is displaceable in a first direction and a second direction along the longitudinal axis. The second direction is substantially opposite to the first direction.
  • the first and the second portions of the auxiliary carrier assembly are detachably coupled to each other.
  • One of said portions of the auxiliary carrier assembly comprises a resilient member, at least a portion of the resilient member being resiliently deformable substantially along a transverse axis, the
  • transverse axis being substantially perpendicular to the longitudinal axis.
  • auxiliary carrier assembly comprises retaining means and triggering means .
  • the retaining means are configured for retaining the resilient member during a coupled state of the carrier assembly.
  • the triggering means are configured for deforming the resilient member to permit release thereof from the retaining means resulting in a decoupled state of the carrier assembly.
  • the main and the auxiliary switches are independently
  • the second aspect of the present invention provides a modular approach for
  • FIGS 1A-1D illustrate a perspective view, a first cross- sectional view, a second cross-sectional view, and an exploded view respectively of an electrical switch assembly in accordance with an embodiment of the present invention
  • FIGS 2A-2E illustrate a first cross-sectional view of the electrical switch assembly in five different stages during switching-on and switching-off operations in accordance with an embodiment of the present invention
  • FIGS 3A-3E illustrate a second cross-sectional view of the electrical switch assembly in five different stages during switching-on and switching-off operations in accordance with an embodiment of the present invention
  • FIGS 2A-2E illustrate a first cross-sectional view of the electrical switch assembly in five different stages during switching-on and switching-off operations in accordance with an embodiment of the present invention
  • FIGS 3A-3E illustrate a second cross-sectional view of the electrical switch assembly in five different stages during switching-on and switching-off operations in accordance with an embodiment of the present invention
  • FIGS 4A-4B illustrate graphical representations of electric currents and stroke traces respectively, through a main switch and an auxiliary switch in five different stages during switching-on and
  • an electrical switch Referring to FIGS 1A through ID, an electrical switch
  • FIG 1A illustrates a perspective view of the electrical switch assembly 100.
  • the electrical switch assembly 100 includes a main switch 102 and an
  • FIG IB shows a first cross-sectional view depicting the electrical switch assembly 100 including the main switch 102 and the auxiliary switch 104 along cross-section B-B
  • FIG 1C shows a second cross-sectional view depicting the auxiliary switch 104 along cross-section C-C indicated in FIG 1A.
  • FIG ID shows an exploded view of the electrical switch assembly 100.
  • the main switch 102 As depicted in adjoining figures, the main switch 102
  • auxiliary switch 104 includes a main housing 106, three pairs of main stationary contacts 108a-108c, a main carrier assembly 110, and three main movable contacts 112a-112c.
  • the auxiliary switch 104 includes an auxiliary housing 114, three pairs of auxiliary stationary contacts 116a-116c, an auxiliary carrier assembly 118, and three auxiliary movable contacts 120a-120c.
  • the auxiliary switch 104 also includes a
  • the electrical switch assembly 100 includes multiple current-limiting resistors 144.
  • the main housing 106 supports the three pairs of main
  • the main carrier assembly 110 extends along a longitudinal axis (z-axis) and is configured to supports the three main movable contacts 112.
  • the auxiliary housing 114 supports the three pairs of auxiliary stationary contacts 108 and the auxiliary carrier assembly 118.
  • assembly 118 extends along a longitudinal axis (z-axis) and is configured to supports the three auxiliary movable
  • the number of pairs of stationary contacts 108, 116 are only exemplary in nature.
  • the number of pairs of stationary contacts 108, 116 can be independently selected, as required.
  • the number of pairs of main stationary contacts 108 is four while the number of auxiliary stationary contacts 116 is three.
  • the number of movable contacts 112, 120 corresponds respectively to number of stationary contacts 108, 116.
  • the auxiliary switch 104 will now be described in more detail .
  • the auxiliary carrier assembly 118 includes a first portion 122 and a second portion 124.
  • the first portion 122 supports the auxiliary movable contacts 120.
  • the second portion 124 interfaces with the first portion 122 at a first end 124a and couples the auxiliary carrier assembly 118 to the main carrier assembly 110 at a second end 124b.
  • each of said portions 122, 124 of the auxiliary carrier assembly 118 is
  • the first and the second portions 122, 124 are adapted to be coupled to and decoupled from each other during different stages of switching-on and switching-off operations of the electrical switch assembly 100. Accordingly, the auxiliary carrier assembly 118 is configured to operate in two distinct states a coupled state and a decoupled state.
  • the first portion 122 includes a resilient member 126.
  • the resilient member 126 includes a first leg 126a, a second leg 126b and a mating shoulder 136.
  • the second portion 124 includes retaining means 128 and triggering means 130.
  • the retaining means 128 include a cavity 138 and a retaining seat 140.
  • the triggering means 130 include a trigger arm 142, which has a head-end 142a and a tail-end 142b.
  • the first portion 122 includes the resilient member 126 at one end thereof.
  • the resilient member 126 is such that at least a portion of the resilient member 126 is resiliently deformable substantially along a transverse axis (x-axis) .
  • the transverse axis (x-axis) is substantially perpendicular to said longitudinal axis.
  • the resilient member 126 is
  • the resilient member 126 includes the first leg 126a and the second leg 126b
  • the first leg 126a at the other end thereof, is rigidly coupled to the first portion 122.
  • the second leg 126b at the other end thereof, is elastically deformable relative to the first leg 126a in a longitudinal plane (x-z plane) containing the first leg 126a and the second leg 126b.
  • the second leg 126b includes the mating shoulder 136. The purpose of the mating shoulder 136 will be explained in detail later in the following description.
  • the resilient member 126 including only one leg, which is rigidly coupled to the first portion 122 at one end, and is resiliently deformable
  • the second portion 124 includes
  • the retaining means 128 are configured for retaining the resilient member 126 during a coupled state of the auxiliary carrier assembly 118.
  • the triggering means 130 are configured for deforming said resilient member 126 to permit release thereof from the retaining means 128 resulting in a decoupled state of the auxiliary carrier assembly 118.
  • one of portions 122, 124 of the auxiliary carrier assembly 118 includes the resilient member 126; and the other of said portions 122, 124 includes the retaining means 128 and triggering means 130.
  • the present invention may be implemented in an alternative manner such that various technical features related to coupling and decoupling of the first portion 122 and the second portion 124, as described above and as will be described in more detail later, and in particular, the resilient member 126, the retaining means 128, and the triggering means 130, may be implemented in a reverse manner.
  • the resilient member 126 is associated with the second portion 124 while the retaining means 128 and the triggering means 130 are associated with the first portion 122.
  • the first and the second portions 122, 124 are coupled through an interaction between the resilient member 126 and the retaining means 128.
  • the retaining means 128 include the cavity 138 and the retaining seat 140.
  • the second portion 124 at its end 124a, has a parallelepiped box-shaped construction, which extends along the longitudinal axis (z-axis) and is devoid of one wall at an interface between the first and the second portions 122, 124 such as to form a cavity 138.
  • the cavity 138 is suitable for receiving the resilient member 126 therein.
  • the construction is configured to form a retaining seat 140.
  • the retaining seat 140 is located substantially near the interface between the first and the second portions 122, 124.
  • the resilient member 126 includes the mating shoulder 136.
  • the mating shoulder 136 has a construction suitable for engaging said retaining seat 140.
  • the construction of the resilient member 126 and the retaining means 128 is such that when the first and the second portions 122, 124 are brought closer to each other along the longitudinal axis (z- axis) , the resilient member 126 slides into the cavity 138 until the mating shoulder 136 click-fits into the retaining seat 140.
  • the first and second portions 122, 124 are configured to cooperate in a sliding manner along the
  • the first and the second portions 122, 124 are brought closer when the
  • auxiliary movable contacts 120 are in the open position, and the main movable contacts 112 transition from the closed position to the open position.
  • the first portion 122 is static while the second portion 124 is displaced towards the first portion 122 along the second direction (S) .
  • the first and the second portions 122, 124 are decoupled primarily through an interaction between the triggering means 130 and the resilient member 126.
  • the triggering means 130 include the trigger arm 142.
  • the trigger arm 142 includes a head-end 142a and a tail-end 142b. Further, the trigger arm 142 is pivoted about a pivot axis (y-axis) passing through point P, which is located
  • the pivot axis (y- axis) is substantially orthogonal to the longitudinal (z- axis) and the transverse axes (x-axis) .
  • the trigger arm 142 is pivoted such that the trigger arm 142 is freely rotatable between a first and a second position.
  • the first position corresponds to a position in which the head-end 142a of the trigger arm 142 is located away from the retaining means 128.
  • the second position corresponds to a position in which the head-end 142a is located close to the retaining means 128 such as to deform the resilient member 126.
  • the trigger arm 142 is pivoted in such manner that the trigger arm 142 tends towards in the first position in absence of an external force. However, the trigger arm 142 tends to rotate towards the second position when a tail-end 142b thereof is engaged by the projection, as will be
  • the resilient member 126 is such that when the second portion 124, along with the first portion 122 in the coupled state, is displaced along the longitudinal axis (z-axis) in the first direction (F) , the tail-end 142b engages a portion of the auxiliary housing 114, such as projection 132.
  • the trigger arm 142 rotates about said pivot axis (y- axis) passing through point P and the head-end 142a deforms the resilient member 126 to permit release thereof from the retaining means 128.
  • the first portion 122 becomes decoupled from the second portion 124.
  • the auxiliary switch 104 also includes the biasing means 134.
  • the biasing means 134 are implemented through a compression spring.
  • the biasing means 134 are coupled to the first portion 122, while on the other end, the biasing means 134 are coupled to the auxiliary housing 114.
  • the biasing means 134 are configured to bias the first portion 122 towards the second direction (S) .
  • the biasing means 134 urge the first portion 122 towards the open position of the auxiliary movable contacts 120.
  • the auxiliary carrier assembly 118 transitions from said coupled state to the decoupled state, whereby the first and the second portions 122, 124 are distanced from each other.
  • the auxiliary switch 104 is adapted for being operationally coupled to the main switch 102.
  • the auxiliary switch 104 is coupled to the main switch 102 using suitable mechanical coupling means such that the auxiliary carrier assembly 118 is operationally coupled to the main carrier assembly 110.
  • supply-side and load-side stationary contacts in the auxiliary switch 104 are
  • auxiliary carrier assembly 118 During the switching-on operation, as the auxiliary carrier assembly 118 is displaced along the longitudinal axis (z- axis) in the first direction (F) . It is generally known that the distance between a movable contact and corresponding stationary contact is referred to as "contact gap".
  • the contact gap (Gl) in the main switch 102 and the contact gap (G2) in the auxiliary switch 104 are such that during the switching-on operation, the auxiliary switch 104 reaches a closed state prior to the main switch 102.
  • the transient current during the switching-on operation flows through the current-limiting resistors 144 and the auxiliary switch 104.
  • the auxiliary carrier assembly 118, along with the main carrier assembly 110, is further displaced along the
  • the auxiliary carrier assembly 118 transitions from the coupled state to the decoupled state, in the manner described
  • transient current during the switching-off operation flows through the main switch 102.
  • the second portion 124 of the auxiliary carrier assembly 118 is also displaced in the same manner.
  • the second portion 124 couples the first portion 122 such that the auxiliary carrier assembly 118 transitions from the decoupled state to the coupled state.
  • the electrical switch assembly 100 becomes ready for the next set of switching-on and switching-off operations.
  • the electrical switch assembly 100 enables separately manufacturing the main switch 102 and the auxiliary switch 104, and coupling the auxiliary switch 104 to the main switch 102, as and when required.
  • the auxiliary switch 104 to the main switch 102, as and when required.
  • electrical switch assembly 100 is provided as a single unit.
  • the main housing 106 and the auxiliary housing 114 are manufactured as an integral
  • the second portion 122 of the auxiliary carrier assembly 118 is integrated with the main carrier assembly 110 to provide a single carrier assembly.
  • the carrier assembly includes two portions, a first portion and a second portion.
  • the first portion is equivalent to the first portion 122, described in conjunction with the preceding embodiment.
  • the second portion is equivalent to a combination of the second portion 124 and the main carrier assembly 110, described in conjunction with the preceding embodiment. Therefore, in this embodiment, the electrical switch assembly 100 is manufactured as a single unit .
  • FIGS 2A through 2E illustrate a first cross-sectional view of the electrical switch assembly 100 in five different stages during switching-on and switching-off operations.
  • FIGS 3A through 3E illustrate a second cross-sectional view of the auxiliary switch 104 in the five different stages during switching-on and switching-off operations.
  • FIGS 4A and 4B illustrate graphical representations of electric currents and stroke traces respectively, through a main switch (Curve I) and an auxiliary switch (Curve II) in the five different stages during switching-on and switching- off operations.
  • the switching-on operation begins at time instant TO and continues till time instant T3.
  • the operation of electrical switch assembly 100 from time instant T3 to time instant T4 is said to be steady state operation.
  • the switching-off operation begins at time instant T4 and continues till time instant T5.
  • FIG 2A and FIG 3A the electrical switch assembly 100 is shown in Stage A.
  • the electrical switch assembly 100 is in Stage A, before initiation of the
  • the electrical switch assembly 100 returns to Stage A after completion of the switching-off operation.
  • Stage A the main movable contacts 112 and the auxiliary movable contacts 120 are in the open position.
  • the auxiliary carrier assembly 118 is in the coupled state.
  • the electrical switch assembly 100 is in Stage A at time instant TO.
  • the main carrier assembly 110 is actuated to displace along the longitudinal axis (z-axis) in the first direction (F) .
  • the auxiliary carrier assembly 118 moves along with the main carrier assembly 110.
  • the contact gaps in the main and the auxiliary switches (Gl, G2) are such that the auxiliary movable contacts are closed before the main movable contacts are closed.
  • the auxiliary movable contacts 120 are closed, resulting in Stage B of the electrical switch assembly 100.
  • auxiliary switch 104 increases significantly at time instant Tl, while the electric current through the main switch 102 remains zero.
  • the relative displacements of the respective carrier assemblies in the main and the auxiliary switches 102, 104 is depicted through stroke trace curves I and II respectively from TO to Tl in FIG 4B. Referring to FIG 2B and FIG 3B, the electrical switch
  • Stage B the main movable contacts 112 are in the open position, while the auxiliary movable contacts 120 are in the closed position. Also, the auxiliary carrier assembly 118 is in the coupled state.
  • the main carrier assembly 110 continues to displace along the longitudinal axis (z-axis) in the first direction (F) .
  • the auxiliary carrier assembly 118 also moves along with the main carrier assembly 110.
  • the main movable contacts 112 are closed, resulting in Stage C of the electrical switch assembly 100.
  • auxiliary switch 104 continues to be at a non-zero value.
  • the relative displacements of the respective carrier assemblies in the main and the auxiliary switches 102, 104 is depicted through stroke trace curves I and II respectively from Tl to T2 in FIG 4B.
  • Stage C the main movable contacts 112 as well as the auxiliary movable
  • Stage C i.e. from time instant T2 to time instant T3, the auxiliary carrier assembly 118 transitions from the coupled state to the decoupled state.
  • the main carrier assembly 110 continues to displace along the longitudinal axis (z-axis) in the first direction (F) .
  • the auxiliary carrier assembly 118 also moves along with the main carrier assembly 110.
  • the triggering means 130 engage the projection 132 and begin to deform the resilient member 126, in the manner described in conjunction with the preceding figures.
  • the first portion 122 becomes decoupled to the second portion 124.
  • the biasing means 134 urge the first portion 122 to return to the open position of the auxiliary movable contacts 120.
  • the electric current (curve II) through the auxiliary switch 104 decreases to zero, while the electric current (curve I) through the main switch 102 continues to be at a non-zero, at time instant T3.
  • the relative displacements of the respective carrier assemblies in the main and the auxiliary switches 102, 104 is depicted through stroke trace curves I and II respectively between T2 and T3 in FIG 4B.
  • Stage D the main movable contacts 112 are in the closed position while the auxiliary movable contacts 120 are in the open position.
  • auxiliary carrier assembly 118 is in the decoupled state .
  • Stage D corresponds to the steady-state operation of the electrical switch assembly 100 during the electrical switch assembly 100 provides a rated current to an electric load. Stage D ends at time instant T4, when the switching-off operation is initiated. As shown in FIG 4A, the electric current (curve I) through the main switch 102 decreases to zero, while the electric current (curve II) through the auxiliary switch 104 continues to be zero, at time instant T4. The relative displacements of the respective carrier assemblies in the main and the
  • auxiliary switches 102, 104 is depicted through stroke trace curves I and II from time instants T3 to T4 in FIG 4B.
  • Stage E the auxiliary movable contacts 120 are in the open position, while the main movable contacts 112 are transitioning from the closed position to the open position. During this stage, the auxiliary movable contacts 120 are in the open position, while the main movable contacts 112 are transitioning from the closed position to the open position. During this stage, the auxiliary movable contacts 120 are in the open position, while the main movable contacts 112 are transitioning from the closed position to the open position. During this stage, the
  • auxiliary carrier assembly 118 transitions from the decoupled state to the coupled state.
  • the main carrier assembly 110 moves along the longitudinal axis (z- axis) in the second direction (S) .
  • the second portion 124 of the auxiliary carrier assembly 118 also moves along with the main carrier assembly 110.
  • the first and the second portions 122, 124 cooperate in a sliding manner, wherein the resilient member 126 is engaged by the retaining means 128, such that at time instant T5, the auxiliary carrier assembly 118 transitions from the decoupled state to the coupled state.
  • the electrical switch assembly 100 becomes ready to begin the next set of switching-on and switching-off
  • the present invention provides an electrical switch assembly adapted for use with electrical loads prone to drawing high transient currents during switching operations.
  • the electrical switch assembly of the present invention is based on a simple, efficient, and reliable design.
  • the electrical switch assembly is configured such that said main and the auxiliary movable contacts contact respective pair of stationary contacts in a desired sequence during the
  • the auxiliary movable contacts are opened at the end of switching-on operation, thus, ensuring that said main movable contacts interrupt an electrically- conductive path between an electric supply and an electric load during the switching-off operation.
  • the present invention facilitates coupling and decoupling of different portions of the carrier assembly carrying the main and the auxiliary movable carriers in an effective and reliable manner to achieve a desired sequence of operating states of said main and said auxiliary switches during switching operations.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

L'invention concerne un ensemble commutateur électrique (100) conçu pour des charges électriques tirant des courants transitoires élevés. L'ensemble commutateur électrique (100) porte au moins une paire de contacts fixes principaux (108) et au moins une paire de contacts fixes auxiliaires (116) et au moins un ensemble de transport (110, 118). L'ensemble de transport (110, 118) comprend au moins une première partie (122) configurée pour porter au moins un contact mobile auxiliaire (120) ; et au moins une seconde partie (124) configurée pour porter au moins un contact mobile principal (112), la première et la seconde partie (122, 124) dudit ensemble de transport (110, 118) étant accouplées l'une à l'autre de manière détachable.
PCT/EP2012/058014 2012-05-02 2012-05-02 Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés WO2013164020A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201290001159.XU CN204155862U (zh) 2012-05-02 2012-05-02 电开关组件和辅助开关
PCT/EP2012/058014 WO2013164020A1 (fr) 2012-05-02 2012-05-02 Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/058014 WO2013164020A1 (fr) 2012-05-02 2012-05-02 Ensemble commutateur électrique conçu pour des charges électriques tirant des courants transitoires élevés

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WO2013164020A1 true WO2013164020A1 (fr) 2013-11-07

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GB1036150A (en) * 1963-12-23 1966-07-13 App Thermoflex Ets Improvements in or relating to electromagnetic relays
EP0545745B1 (fr) 1991-12-05 1995-11-29 Schneider Electric Sa Dispositif de commutation multipolaire à action partiellement fugitive
US5546062A (en) * 1993-07-12 1996-08-13 Schneider Electric Sa Protection switch
EP0905732A2 (fr) * 1997-09-24 1999-03-31 GE Power Controls Iberica, S.A. Dispositif de contacts auxiliaires pour le raccordement d'un contacteur avec correction de facteur de puissance
EP1978541A2 (fr) * 2007-04-02 2008-10-08 Moeller GmbH Contacteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036150A (en) * 1963-12-23 1966-07-13 App Thermoflex Ets Improvements in or relating to electromagnetic relays
EP0545745B1 (fr) 1991-12-05 1995-11-29 Schneider Electric Sa Dispositif de commutation multipolaire à action partiellement fugitive
US5546062A (en) * 1993-07-12 1996-08-13 Schneider Electric Sa Protection switch
EP0905732A2 (fr) * 1997-09-24 1999-03-31 GE Power Controls Iberica, S.A. Dispositif de contacts auxiliaires pour le raccordement d'un contacteur avec correction de facteur de puissance
EP1978541A2 (fr) * 2007-04-02 2008-10-08 Moeller GmbH Contacteur

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