CN212084864U - Neutral line overlapping mechanism and dual-power automatic transfer switch comprising same - Google Patents

Neutral line overlapping mechanism and dual-power automatic transfer switch comprising same Download PDF

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Publication number
CN212084864U
CN212084864U CN202020560212.6U CN202020560212U CN212084864U CN 212084864 U CN212084864 U CN 212084864U CN 202020560212 U CN202020560212 U CN 202020560212U CN 212084864 U CN212084864 U CN 212084864U
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China
Prior art keywords
neutral pole
pull rod
power supply
neutral
boss
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CN202020560212.6U
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Chinese (zh)
Inventor
周斌
潘艳明
刘振忠
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/46—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having three operative positions, e.g. off/star/delta
    • 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
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/20—Driving mechanisms allowing angular displacement of the operating part to be effective in either direction
    • H01H19/24—Driving mechanisms allowing angular displacement of the operating part to be effective in either direction acting with snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/36—Driving mechanisms
    • H01H21/40—Driving mechanisms having snap action
    • H01H21/42—Driving mechanisms having snap action produced by compression or extension of coil spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/36—Driving mechanisms
    • H01H21/40—Driving mechanisms having snap action
    • H01H21/46—Driving mechanisms having snap action with two or more snap-action motions in succession
    • 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
    • H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3084—Kinetic energy of moving parts recuperated by transformation into potential energy in closing or opening spring to be used in next operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/018—Application transfer; between utility and emergency power supply
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H01H3/58—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using friction, toothed, or other mechanical clutch
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/24—Interlocking, locking, or latching mechanisms for interlocking two or more parts of the mechanism for operating contacts

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

A dual-power automatic transfer switch and a neutral line overlapping mechanism thereof are provided, wherein the dual-power automatic transfer switch comprises a first fixed contact component, a first movable contact component, a second fixed contact component and a second movable contact component; wherein the neutral line overlapping mechanism comprises a first pull rod assembly and a second pull rod assembly, a first neutral pole moving contact assembly and a first neutral pole static contact assembly, and a second neutral pole moving contact assembly and a second neutral pole static contact assembly and is configured to: when the dual-power automatic transfer switch is in a double-division position, one neutral pole is in a connection state; when the dual-power automatic transfer switch performs opening operation, the first neutral pole moving contact component and the second neutral pole moving contact component do not act; when the dual-power automatic transfer switch performs switching-on operation, the first neutral pole moving contact component and the second neutral pole moving contact component are linked with the first moving contact component or the second neutral pole moving contact component and the moving contact component of the first neutral pole are linked with the second moving contact component.

Description

Neutral line overlapping mechanism and dual-power automatic transfer switch comprising same
Technical Field
The present disclosure relates to a neutral line overlapping mechanism of a dual power automatic transfer switch and a dual power automatic transfer switch including the same.
Background
Dual power Automatic Transfer Switches (ATS) can be classified into: ATS switching simultaneously with other poles and neutral wire overlap switching type ATS in which the load neutral pole is connected to the neutral wire of the power source 1 or 2 during power source switching. Neutral overlay switching is highly appreciated because it avoids system instability due to the short levitation of the load neutral pole when the ATS is switched. Many manufacturers and research institutes have proposed techniques for overlapping neutral switching. However, for a three-position ATS (i.e., a double-split with power 1 combined, power 2 combined, and 2 power all split), it is quite different whether the neutral pole of the load is connected to the neutral of one of the power sources or to the neutral of both power sources in the double-split case. If the latter is the case, the ATS may have a long overlap of the neutral during the transition, so that an excessively long overlap time may cause malfunction of the upper leakage sensor and thus adverse effects of stray currents on the system.
The neutral line overlapping scheme provided by the technology is simultaneously suitable for two-position and three-position ATS, has a simple structure, is short and reliable, and meets the system requirements, and the neutral line overlapping time is not influenced by the conversion form of the ATS.
SUMMERY OF THE UTILITY MODEL
To address one or more of the above-identified deficiencies in the prior art, according to one aspect of the present disclosure, a neutral overlap mechanism for a dual power automatic transfer switch is provided that includes a first stationary contact assembly and a first movable contact assembly, a second stationary contact assembly and a second movable contact assembly.
The neutral line overlapping mechanism comprises a first pull rod assembly, a second pull rod assembly, a first neutral pole moving contact assembly, a first neutral pole static contact assembly, a second neutral pole moving contact assembly and a second neutral pole static contact assembly.
By cooperation of the first pull rod assembly with the first movable contact assembly, the first neutral pole movable contact assembly, and the second neutral pole movable contact assembly and by cooperation of the second pull rod assembly with the second movable contact assembly, the second neutral pole movable contact assembly, and the first neutral pole movable contact assembly, such that:
when the dual-power automatic transfer switch is in a double-division position, one neutral pole is in a connection state.
When the dual-power automatic transfer switch performs opening operation, the first neutral pole moving contact component and the second neutral pole moving contact component do not act.
When a first power supply of the dual-power automatic transfer switch is switched on, the first neutral pole moving contact component and the first moving contact component are linked.
When a second power supply of the dual-power automatic transfer switch is switched on, the second neutral pole moving contact component is linked with the second moving contact component.
According to the above aspect of the present disclosure, the first neutral pole movable contact assembly includes a first neutral pole movable contact, a first neutral pole movable contact support, and a first neutral pole support actuation tab.
The first neutral pole movable contact is retained on the first neutral pole movable contact support, and the first neutral pole support actuator tab is connected to the first neutral pole movable contact support.
The second neutral pole moving contact component comprises a second neutral pole moving contact, a second neutral pole moving contact support and a second neutral pole support actuating sheet.
The second neutral pole moving contact is held on the second neutral pole moving contact support, and the second neutral pole support actuating piece is connected to the second neutral pole moving contact support.
According to various aspects of the disclosure, the first pull rod assembly includes a first power source first pull rod and a first power source second pull rod.
The first power supply first pull rod and the first power supply second pull rod are connected to the first movable contact assembly and can drive the first movable contact assembly to be closed or separated from the first fixed contact assembly.
The second pull rod assembly comprises a second power supply first pull rod and a second power supply second pull rod.
The second power supply first pull rod and the second power supply second pull rod are connected to the second movable contact assembly and can drive the second movable contact assembly to be closed or separated from the second fixed contact assembly.
According to the above aspects of the present disclosure, the first neutral pole bracket actuator piece is provided with a first neutral pole first boss and a first neutral pole second boss.
The first neutral pole first boss cooperates with the first power supply second pull rod.
The first neutral pole second boss cooperates with the second power supply second pull rod.
And a second neutral pole first boss and a second neutral pole second boss are arranged on the second neutral pole support actuating sheet.
The second neutral pole first boss cooperates with the second power supply first pull rod.
The second neutral pole second boss cooperates with the first power supply first pull rod.
According to the above aspects of the present disclosure, the first neutral pole first boss and the first neutral pole second boss are coaxially disposed and a diameter of the first neutral pole first boss is larger than a diameter of the first neutral pole second boss.
The second neutral pole first boss and the second neutral pole second boss are coaxially arranged and the diameter of the second neutral pole first boss is larger than that of the second neutral pole second boss.
According to the above aspects of the present disclosure, an elongated closed-shaped first power source first draw bar hole is provided on the first power source first draw bar.
And a first power supply second pull rod hole in an elongated closed shape is formed in the first power supply second pull rod.
The length of the first power supply first pull rod hole is smaller than that of the first power supply second pull rod hole.
And a first pull rod hole of the second power supply in an elongated closed shape is arranged on the first pull rod of the second power supply.
And a second power supply second pull rod hole in an elongated closed shape is formed in the second power supply second pull rod.
The length of the second power supply first pull rod hole is larger than that of the second power supply second pull rod hole.
According to the above aspects of the present disclosure, the first neutral pole first boss is fitted only in the first power supply second draw bar hole.
The first neutral pole second boss is only fitted in the second power supply second draw bar hole.
The second neutral pole first boss is only fitted in the second power supply first pull rod hole.
The second neutral pole second boss is only fitted in the first power supply first pull rod hole.
The length of the first power supply first pull rod hole is equal to the length of the second power supply second pull rod hole.
The length of the first power supply second pull rod hole is equal to that of the second power supply first pull rod hole.
According to the above aspects of the present disclosure, the first static neutral contact assembly includes a first static neutral contact inlet terminal and a first static neutral contact outlet terminal.
One end of the first neutral pole moving contact is in contact with one of the inlet end of the first neutral pole fixed contact and the outlet end of the first neutral pole fixed contact.
The other end of the first neutral pole moving contact can be in contact with or separated from the other of the inlet end of the first neutral pole fixed contact and the outlet end of the first neutral pole fixed contact.
The second neutral pole static contact assembly comprises a second neutral pole static contact wire inlet end and a second neutral pole static contact wire outlet end.
One end of the second neutral pole moving contact is in contact with one of the inlet end of the second neutral pole fixed contact and the outlet end of the second neutral pole fixed contact.
The other end of the second neutral pole moving contact can be in contact with or separated from the other of the second neutral pole fixed contact wire inlet end and the second neutral pole fixed contact wire outlet end.
By changing the neutral pole from a double break to a single break, only one side remains in contact, which provides retention of the neutral pole in the open position (i.e., open limit).
It can also be understood by those skilled in the art that the contact stroke is increased by widening the fixed contact of the neutral pole and reducing the opening distance, so as to ensure that the neutral pole is closed before the P pole (phase line pole).
In addition, the movable contact and the fixed contact of the neutral pole according to the disclosure can be preassembled into an assembly without special tools or tools. Thus, the assembly difficulty and the working hours are not greatly influenced.
According to the above aspects of the present disclosure, no arc chute pieces are provided on the first and second neutral pole moving contacts.
According to another aspect of the present disclosure, the first and second neutral pole carrier actuation tabs are integrally formed and connected together by first and second connection posts.
In accordance with the above another aspect of the present disclosure, an elongated open-shaped first power source first draw bar slot is provided on the first power source first draw bar.
An elongated open first power supply second pull rod slot is disposed on the first power supply second pull rod.
The length of the first power supply first pull rod slot is equal to that of the first power supply second pull rod slot.
An elongated open second power supply first pull rod slot is disposed on the second power supply first pull rod.
An elongated open second power supply second pull rod slot is disposed on the second power supply second pull rod.
The length of the first pull rod groove of the second power supply is equal to that of the second pull rod groove of the second power supply.
According to the above another aspect of the present disclosure, the first connecting post is fitted in the first power supply first draw bar slot and the second power supply first draw bar slot.
The second connecting column is matched in the first power supply second pull rod groove and the second power supply second pull rod groove.
The length of the first power supply first pull rod slot is equal to the length of the second power supply second pull rod slot.
The length of the first power supply second pull rod slot is equal to that of the second power supply first pull rod slot.
The first neutral pole moving contact component and the second neutral pole moving contact component are connected into a whole by an intermediate turntable (namely the first neutral pole support actuating sheet and the second neutral pole support actuating sheet are integrally formed and are connected together by a first connecting column and a second connecting column), the opening position of the first neutral pole moving contact component corresponds to the closing position of the second neutral pole moving contact component, the closing position of the second neutral pole moving contact component is limited by the contact holding force, and the opening position of the first neutral pole moving contact component is limited at the same time. On the contrary, the opening position of the second neutral pole moving contact component is limited by closing of the first neutral pole moving contact component.
When the dual-power automatic transfer switch according to the disclosure transfers between two power sources, the switch closing can drive ABC (three phase line poles) + N1/N2 (two neutral poles) simultaneously, and the switch opening only drives the ABC (three phase line poles) of the switch, that is, the switch acts once, and can drive 5 switches (when closing) or 3 switches (when opening) simultaneously.
According to the above-described technology of the present disclosure, a simple structure is realized, and the neutral line overlapping time at the time of switching is short and stable.
According to yet another aspect of the present disclosure, a dual power automatic transfer switch is presented that includes a neutral overlap mechanism as described in the various aspects above.
So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.
As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.
Drawings
The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.
Fig. 1 shows a perspective assembly view of a neutral overlapping mechanism of a dual power automatic transfer switch according to a first embodiment of the present disclosure;
FIG. 2 shows an exploded perspective view of FIG. 1;
FIG. 3 shows a simplified diagram of FIG. 2;
FIG. 4 shows the neutral pole changed from a double break to a single break, with only one side remaining in contact;
FIG. 5 illustrates a perspective assembly view of a neutral overlay mechanism according to a second embodiment of the present disclosure;
FIG. 6 shows a simplified diagram of FIG. 5;
FIG. 7 shows the first and second neutral pole carrier actuation tabs being integrally formed and connected together by first and second connection posts in accordance with a second embodiment of the present disclosure;
fig. 8 shows an assembled perspective view of a neutral overlapping mechanism of a dual power automatic transfer switch according to a second embodiment of the present disclosure;
FIG. 9 shows an exploded perspective view of FIG. 8;
FIG. 10 shows a simplified diagram of FIG. 9;
FIG. 11 illustrates a perspective assembly view with the first and second tie rod assemblies of FIG. 8 omitted;
fig. 12 shows a first and second neutral pole support actuation tab according to a first embodiment of the present disclosure.
Detailed Description
Embodiments according to the present disclosure are described in detail below with reference to the various drawings.
Fig. 1 shows an assembled perspective view of a neutral wire overlapping mechanism of a dual power automatic transfer switch including a first fixed contact assembly 7 and a first movable contact assembly 8, a second fixed contact assembly 9 and a second movable contact assembly 10 according to a first embodiment of the present disclosure.
The neutral line overlapping mechanism comprises a first pull rod assembly 1, a second pull rod assembly 2, a first neutral pole moving contact assembly 3, a first neutral pole static contact assembly 4, a second neutral pole moving contact assembly 5 and a second neutral pole static contact assembly 6.
By the cooperation of the first tie assembly 1 with the first movable contact assembly 8, the first neutral pole movable contact assembly 3 and the second neutral pole movable contact assembly 5 and by the cooperation of the second tie assembly 2 with the second movable contact assembly 10, the second neutral pole movable contact assembly 5 and the first neutral pole movable contact assembly 3, so that:
when the dual-power automatic transfer switch is in the double-split position, one of the neutral poles is in the on state, that is, the first neutral pole moving contact component 3 and the first neutral pole static contact component 4 are in the on state or the second neutral pole moving contact component 5 and the second neutral pole static contact component 6 are in the on state.
When the dual-power automatic transfer switch performs opening operation, the first neutral pole moving contact component 3 and the second neutral pole moving contact component 5 do not act.
When the first power supply of the dual-power automatic transfer switch is switched on, the first neutral pole moving contact component 3 and the first moving contact component 8 are linked.
When the second power supply of the dual-power automatic transfer switch performs a switching-on operation, the second neutral pole moving contact assembly 5 and the second moving contact assembly 10 are linked.
According to the above-mentioned embodiment of the present disclosure, the first neutral moving contact assembly 3 includes a first neutral moving contact 3-1, a first neutral moving contact support 3-2 and a first neutral support actuation tab 3-3.
The first neutral moving contact 3-1 is retained on the first neutral moving contact support 3-2 and the first neutral support actuator 3-3 is connected to the first neutral moving contact support 3-2, for example by a spline connection as shown in fig. 2.
The second neutral pole moving contact assembly 5 comprises a second neutral pole moving contact 5-1, a second neutral pole moving contact support 5-2 and a second neutral pole support actuating sheet 5-3.
The second neutral moving contact 5-1 is retained on the second neutral moving contact support 5-2, and the second neutral support actuator 5-3 is connected to the second neutral moving contact support 5-2, for example, by a spline connection in fig. 2.
According to the above embodiments of the present disclosure, as shown in fig. 2, the first pull rod assembly 1 includes a first power first pull rod 1-1 and a first power second pull rod 1-2.
The first power supply first pull rod 1-1 and the first power supply second pull rod 1-2 are connected to the first movable contact assembly 8 and can bring the first movable contact assembly 8 into and out of contact with the first fixed contact assembly 7.
The second pull rod assembly 2 comprises a second power supply first pull rod 2-1 and a second power supply second pull rod 2-2.
The second power supply first pull rod 2-1 and the second power supply second pull rod 2-2 are connected to the second movable contact assembly 10 and can bring the second movable contact assembly 10 into and out of contact with the second fixed contact assembly 9.
According to the above embodiments of the present disclosure, as shown in fig. 2, 3 and 12, the first neutral pole bracket actuator tab 3-3 is provided with a first neutral pole first boss 3-3-1 and a first neutral pole second boss 3-3-2. For clarity of description, the lengths of the first neutral pole first boss 3-3-1 and the first neutral pole second boss 3-3-2 are elongated in fig. 2 and 3.
The first neutral pole first boss 3-3-1 cooperates with the first power supply second pull rod 1-2.
The first neutral pole second boss 3-3-2 cooperates with the second power supply second pull rod 2-2.
The second neutral pole support actuating sheet 5-3 is provided with a second neutral pole first boss 5-3-1 and a second neutral pole second boss 5-3-2.
For clarity of description, the lengths of the second neutral pole first boss 5-3-1 and the second neutral pole second boss 5-3-2 are elongated in fig. 2 and 3.
The second neutral pole first boss 5-3-1 cooperates with the second power supply first pull rod 2-1.
The second neutral pole second boss 5-3-2 is fitted with the first power supply first pull rod 1-1.
According to the above embodiments of the present disclosure, the first neutral pole first boss 3-3-1 and the first neutral pole second boss 3-3-2 are coaxially disposed and the diameter of the first neutral pole first boss 3-3-1 is larger than the diameter of the first neutral pole second boss 3-3-2.
The second neutral pole first boss 5-3-1 and the second neutral pole second boss 5-3-2 are coaxially arranged and the diameter of the second neutral pole first boss 5-3-1 is larger than that of the second neutral pole second boss 5-3-2.
According to the above embodiments of the present disclosure, the first power source first pull rod hole 1-1-1 is provided in the first power source first pull rod 1-1.
And a first power supply second pull rod hole 1-2-1 in a slender closed shape is formed in the first power supply second pull rod 1-2.
The length of the first power supply first pull rod hole 1-1-1 is smaller than that of the first power supply second pull rod hole 1-2-1.
And a slender closed second power supply first pull rod hole 2-1-1 is formed in the second power supply first pull rod 2-1.
And a second power supply second pull rod hole 2-2-1 in a slender closed shape is arranged on the second power supply second pull rod 2-2.
The length of the second power supply first pull rod hole 2-1-1 is larger than that of the second power supply second pull rod hole 2-2-1.
According to the above embodiments of the present disclosure, the first neutral pole first boss 3-3-1 is fitted only in the first power supply second tie bar 1-2-1 hole.
The first neutral pole second boss 3-3-2 is fitted only in the second power supply second draw bar hole 2-2-1.
The second neutral pole first boss 5-3-1 is fitted only in the second power supply first draw bar hole 2-1-1.
The second neutral pole second boss 5-3-2 is only fitted in the first power supply first pull rod hole 1-1-1.
The length of the first power supply first pull rod hole 1-1-1 is equal to the length of the second power supply second pull rod hole 2-2-1.
The length of the first power supply second pull rod hole 1-2-1 is equal to the length of the second power supply first pull rod hole 2-1-1.
According to the above embodiments of the present disclosure, the first static contact assembly 4 includes a first static contact inlet terminal 4-1 and a first static contact outlet terminal 4-2.
One end of the first neutral pole moving contact 3-1 is in contact with one of the first neutral pole fixed contact inlet terminal 4-1 and the first neutral pole fixed contact outlet terminal 4-2.
The other end of the first neutral pole moving contact 3-1 can be in contact with or separated from the other of the first neutral pole fixed contact wire inlet end 4-1 and the first neutral pole fixed contact wire outlet end 4-2.
As shown in fig. 4, one end of the first moving neutral contact 3-1 is always in contact with the outlet terminal 4-2 of the first stationary neutral contact, and the other end of the first moving neutral contact 3-1 is able to be in contact with or separated from the inlet terminal 4-1 of the first stationary neutral contact.
The second static contact assembly 6 comprises a second static contact inlet terminal 6-1 and a second static contact outlet terminal 6-2.
One end of the second neutral pole moving contact 5-1 is in contact with one of the second neutral pole fixed contact inlet terminal 6-1 and the second neutral pole fixed contact outlet terminal 6-2.
The other end of the second neutral pole moving contact 5-1 can be in contact with or separated from the other of the second neutral pole fixed contact wire inlet end 6-1 and the second neutral pole fixed contact wire outlet end 6-2.
As shown in fig. 4, one end of the second moving contact for neutral pole 5-1 is always in contact with the outlet terminal 6-2 of the second stationary contact for neutral pole, and the other end of the second moving contact for neutral pole 5-1 can be in contact with or separated from the inlet terminal 6-1 of the second stationary contact for neutral pole.
By changing the neutral pole from a double break to a single break, only one side remains in contact, which provides retention of the neutral pole in the open position (i.e., open limit).
It can also be understood by those skilled in the art that the contact stroke is increased by widening the fixed contact of the neutral pole and reducing the opening distance, so as to ensure that the neutral pole is closed before the P pole (phase line pole).
In addition, the movable contact and the fixed contact of the neutral pole according to the disclosure can be preassembled into an assembly without special tools or tools. Thus, the assembly difficulty and the working hours are not greatly influenced.
According to the above embodiments of the present disclosure, as shown in fig. 4, arc extinguishing grids are not disposed on the first and second fixed neutral- pole contacts 4 and 6.
According to another embodiment of the present disclosure, as shown in fig. 5 to 11, the same structures as those of the above-described embodiment have the same reference numerals in the present embodiment. This embodiment differs from the above described embodiment in that the first and second neutral pole support actuating tabs 3-3 and 5-3 are integrally formed and connected together by first and second connecting posts 11 and 12, wherein in fig. 9-10 the first and second connecting posts 11 and 12 are elongated for clarity of description.
According to another embodiment of the present disclosure, an elongated open-shaped first power source first pull rod slot 1-1-2 is provided on the first power source first pull rod 1-1.
And an elongated open-shaped first power supply second pull rod groove 1-2-2 is formed in the first power supply second pull rod 1-2.
The length of the first power supply first pull rod slot 1-1-2 is equal to the length of the first power supply second pull rod slot 1-2-2.
And an elongated open-shaped second power supply first pull rod groove 2-1-2 is formed in the second power supply first pull rod 2-1.
And an elongated open-shaped second power supply second pull rod groove 2-2-2 is formed in the second power supply second pull rod 2-2.
The length of the second power supply first pull rod slot 2-1-2 is equal to the length of the second power supply second pull rod slot 2-2-2.
According to another embodiment of the present disclosure, the first connecting post 11 is fitted in the first power supply first pull rod slot 1-1-2 and the second power supply first pull rod slot 2-1-2.
The second connecting post 12 fits in the first power supply second tie bar slot 1-2-2 and the second power supply second tie bar slot 2-2-2.
The length of the first power supply first pull rod slot 1-1-2 is equal to the length of the second power supply second pull rod slot 2-2-2.
The length of the first power supply second pull rod slot 1-2-2 is equal to the length of the second power supply first pull rod slot 2-1-2.
The first neutral pole moving contact component 3 and the second neutral pole moving contact component 5 are connected into a whole by an intermediate turntable (namely, the first neutral pole support actuating sheet and the second neutral pole support actuating sheet are integrally formed and are connected together by a first connecting column and a second connecting column), the opening position of the first neutral pole moving contact component 3 corresponds to the closing position of the second neutral pole moving contact component 5, the closing position of the second neutral pole moving contact component 5 is limited by contact holding force, and the opening position of the first neutral pole moving contact component 3 is also limited. On the contrary, the opening position of the second neutral pole moving contact component 5 is limited by closing of the first neutral pole moving contact component 3.
The operation sequence of the first embodiment will be described in detail below with reference to the drawings.
In fig. 1 and 2, the first power source of the dual power automatic transfer switch is in a closed state, i.e., the first movable contact assembly 8 is in contact with the first fixed contact assembly 7 (phase pole closed) and the first neutral movable contact assembly 3 is in contact with the first neutral fixed contact assembly 4 (neutral pole closed), while the second power source of the dual power automatic transfer switch is in an open state, i.e., the second movable contact assembly 10 is not in contact with the second fixed contact assembly 9 (phase pole open) and the second neutral movable contact assembly 5 and the second neutral fixed contact assembly 6 are not in contact (neutral pole open), the first neutral first boss 3-3-1 abuts against one of the edges of the first power source second pull rod hole 1-2-1, the second neutral second boss 5-3-2 abuts against one of the edges of the first power source first pull rod hole 1-1-1, the second neutral first boss 5-3-1 abuts one of the edges of the second power supply first pull rod hole 2-1-1, and the first neutral second boss 3-3-2 abuts one of the edges of the second power supply second pull rod hole 2-2-1.
When the first power supply changes from a closing state to an opening state, the first pull rod 1-1 of the first power supply moves rightwards, the second pull rod 1-2 of the first power supply moves leftwards, the first pull rod 2-1 of the second power supply does not move, the second pull rod 2-2 of the second power supply does not move, and the first movable contact component 8 and the first fixed contact component 7 start to be separated (phase pole opening). Due to the existence of the first power supply first pull rod hole 1-1-1 and the first power supply second pull rod hole 1-2-1, the first neutral pole first boss 3-3-1 and the second neutral pole second boss 5-3-2 do not move, but respectively approach the other edge of the first power supply second pull rod hole 1-2-1 and the other edge of the first power supply first pull rod hole 1-1-1, so that the first neutral pole moving contact assembly 3 and the first neutral pole static contact assembly 4 are kept in a contact state (the neutral poles are kept closed), the second neutral pole moving contact assembly 5 and the second neutral pole static contact assembly 6 are kept out of contact (the neutral poles are kept open), and the second moving contact assembly 10 and the second static contact assembly 9 are kept out of contact (the phase pole is open).
When the phase pole of the first power supply is switched off in place, the first neutral pole first boss 3-3-1 abuts against the other edge of the first power supply second pull rod hole 1-2-1, the second neutral pole second boss 5-3-2 abuts against the other edge of the first power supply first pull rod hole 1-1-1, the phase pole of the second power supply starts to be switched on, namely the second power supply first pull rod 2-1 starts to move rightwards, the second power supply second pull rod 2-2 moves leftwards, the first power supply first pull rod 1-1 is not moved, the first power supply second pull rod 1-2 is not moved, the second power supply first pull rod hole 2-1-1 and the second power supply second pull rod hole 2-2-1 respectively actuate the second neutral pole first boss 5-3-1 and the first neutral pole second boss 3-3-2, the first neutral pole first boss 3-3-1 is close to the one edge of the first power supply second pull rod hole 1-2-1, the second neutral pole second boss 5-3-2 is close to the one edge of the first power supply first pull rod hole 1-1-1, so that the first neutral pole moving contact assembly 3 is separated from the first neutral pole fixed contact assembly 4 (neutral pole opening), the second neutral pole moving contact assembly 5 is in contact with the second neutral pole fixed contact assembly 6 (neutral pole closing), the second moving contact assembly 10 is in contact with the second fixed contact assembly 9 (phase pole closing), and the first moving contact assembly 8 is not in contact with the first fixed contact assembly 7 (phase pole opening).
The steps are carried out to complete the conversion from the first power supply of the dual-power automatic transfer switch in a closing state to an opening state and then to the second power supply of the dual-power automatic transfer switch in a closing state.
As will be appreciated by those skilled in the art, the transition from the second power source of the dual power automatic transfer switch being in the closed state to the open state to the first power source of the dual power automatic transfer switch being in the closed state is the reverse of the above-described process.
When the dual-power automatic transfer switch according to the disclosure transfers between two power sources, the switch closing can drive ABC (three phase line poles) + N1/N2 (two neutral poles) simultaneously, and the switch opening only drives the ABC (three phase line poles) of the switch, that is, the switch acts once, and can drive 5 switches (when closing) or 3 switches (when opening) simultaneously.
According to the above-described technique of the present disclosure, a simple structure is realized and the neutral line overlapping time at the time of switching is short and stable.
According to yet another embodiment of the present disclosure, a dual power automatic transfer switch is presented that includes a neutral overlap mechanism as described in the various embodiments above.
While the disclosure has been described in the specification and drawings with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosure as defined in the claims. Moreover, the combination and arrangement of features, elements and/or functions between specific embodiments herein is clearly apparent and thus, in light of this disclosure, one skilled in the art will appreciate that features, elements and/or functions of an embodiment may be incorporated into another specific embodiment as appropriate, unless described otherwise, above. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the essential scope thereof. Therefore, it is intended that the disclosure not be limited to the particular embodiment illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out this disclosure, but that the disclosure will include all embodiments falling within the scope of the foregoing description and the appended claims.

Claims (13)

1. A neutral line overlapping mechanism of a dual-power automatic transfer switch comprises a first fixed contact component, a first movable contact component, a second fixed contact component and a second movable contact component; it is characterized in that the preparation method is characterized in that,
the neutral wire overlapping mechanism comprises a first pull rod assembly, a second pull rod assembly, a first neutral pole moving contact assembly, a first neutral pole static contact assembly, a second neutral pole moving contact assembly and a second neutral pole static contact assembly;
by cooperation of the first pull rod assembly with the first movable contact assembly, the first neutral pole movable contact assembly, and the second neutral pole movable contact assembly and by cooperation of the second pull rod assembly with the second movable contact assembly, the second neutral pole movable contact assembly, and the first neutral pole movable contact assembly, such that:
when the dual-power automatic transfer switch is in a double-division position, one neutral pole is in a connection state;
when the dual-power automatic transfer switch performs opening operation, the first neutral pole moving contact component and the second neutral pole moving contact component do not act;
when a first power supply of the dual-power automatic transfer switch is switched on, the first neutral pole moving contact component is linked with the first moving contact component;
when a second power supply of the dual-power automatic transfer switch is switched on, the second neutral pole moving contact component is linked with the second moving contact component.
2. The neutral overlapping mechanism of claim 1,
the first neutral pole moving contact assembly comprises a first neutral pole moving contact, a first neutral pole moving contact support and a first neutral pole support actuating sheet;
said first neutral pole movable contact being retained on said first neutral pole movable contact support, said first neutral pole support actuator tab being connected to said first neutral pole movable contact support;
the second neutral pole moving contact component comprises a second neutral pole moving contact, a second neutral pole moving contact support and a second neutral pole support actuating sheet;
the second neutral pole moving contact is held on the second neutral pole moving contact support, and the second neutral pole support actuating piece is connected to the second neutral pole moving contact support.
3. The neutral overlapping mechanism of claim 2,
the first pull rod assembly comprises a first power supply first pull rod and a first power supply second pull rod;
the first power supply first pull rod and the first power supply second pull rod are connected to the first movable contact component and can drive the first movable contact component to be closed or separated from the first fixed contact component;
the second pull rod assembly comprises a second power supply first pull rod and a second power supply second pull rod;
the second power supply first pull rod and the second power supply second pull rod are connected to the second movable contact assembly and can drive the second movable contact assembly to be closed or separated from the second fixed contact assembly.
4. The neutral overlapping mechanism of claim 3,
the first neutral pole support actuating sheet is provided with a first neutral pole first boss and a first neutral pole second boss;
the first neutral pole first boss is matched with the first power supply second pull rod;
the first neutral pole second boss is matched with the second power supply second pull rod;
the second neutral pole support actuating sheet is provided with a second neutral pole first boss and a second neutral pole second boss;
the second neutral pole first boss is matched with the second power supply first pull rod;
the second neutral pole second boss cooperates with the first power supply first pull rod.
5. The neutral overlapping mechanism of claim 4,
the first neutral pole first boss and the first neutral pole second boss are coaxially arranged and the diameter of the first neutral pole first boss is larger than that of the first neutral pole second boss;
the second neutral pole first boss and the second neutral pole second boss are coaxially arranged and the diameter of the second neutral pole first boss is larger than that of the second neutral pole second boss.
6. The neutral overlapping mechanism of claim 5,
a first power supply first pull rod hole in an elongated closed shape is formed in the first power supply first pull rod;
a first power supply second pull rod hole in an elongated closed shape is formed in the first power supply second pull rod;
the length of the first power supply first pull rod hole is smaller than that of the first power supply second pull rod hole;
a first pull rod hole of the second power supply is formed in the first pull rod of the second power supply in an elongated closed shape;
a second power supply second pull rod hole in an elongated closed shape is formed in the second power supply second pull rod;
the length of the second power supply first pull rod hole is larger than that of the second power supply second pull rod hole.
7. The neutral overlapping mechanism of claim 6,
the first neutral pole first boss is only matched in the first power supply second pull rod hole;
the first neutral pole second boss is only matched in the second power supply second pull rod hole;
the second neutral pole first boss is only matched in the second power supply first pull rod hole;
the second neutral pole second boss is only matched in the first power supply first pull rod hole;
the length of the first power supply first pull rod hole is equal to that of the second power supply second pull rod hole;
the length of the first power supply second pull rod hole is equal to that of the second power supply first pull rod hole.
8. The neutral overlapping mechanism of claim 7,
the first static contact assembly of the neutral pole comprises a first static contact inlet end of the neutral pole and a first static contact outlet end of the neutral pole;
one end of the first neutral pole moving contact is in contact with one of the inlet end of the first neutral pole fixed contact and the outlet end of the first neutral pole fixed contact;
the other end of the first neutral pole moving contact can be in contact with or separated from the other of the inlet end of the first neutral pole fixed contact and the outlet end of the first neutral pole fixed contact;
the second neutral pole static contact component comprises a second neutral pole static contact wire inlet end and a second neutral pole static contact wire outlet end;
one end of the second neutral pole moving contact is in contact with one of the inlet end of the second neutral pole fixed contact and the outlet end of the second neutral pole fixed contact;
the other end of the second neutral pole moving contact can be in contact with or separated from the other of the second neutral pole fixed contact wire inlet end and the second neutral pole fixed contact wire outlet end.
9. The neutral overlapping mechanism of claim 8,
arc extinguishing grid pieces are not arranged on the first neutral pole moving contact and the second neutral pole static contact.
10. The neutral overlapping mechanism of claim 9,
the first and second neutral pole carrier actuation tabs are integrally formed and connected together by first and second connection posts.
11. The neutral overlapping mechanism of claim 10,
providing an elongated open first power supply first pull rod slot on the first power supply first pull rod;
providing an elongated open shaped first power supply second draw bar slot on the first power supply second draw bar;
the length of the first power supply first pull rod slot is equal to that of the first power supply second pull rod slot;
providing an elongated open second power supply first pull rod slot on the second power supply first pull rod;
providing an elongated open second power supply second pull rod slot on the second power supply second pull rod;
the length of the first pull rod groove of the second power supply is equal to that of the second pull rod groove of the second power supply.
12. The neutral overlapping mechanism of claim 11,
the first connecting post fits in the first power supply first pull rod slot and the second power supply first pull rod slot;
the second connecting column is matched in the first power supply second pull rod groove and the second power supply second pull rod groove;
the length of the first power supply first pull rod slot is equal to that of the second power supply second pull rod slot;
the length of the first power supply second pull rod slot is equal to that of the second power supply first pull rod slot.
13. A dual power automatic transfer switch, characterized in that it comprises a neutral overlapping mechanism as claimed in one of the preceding claims 1 to 12.
CN202020560212.6U 2020-02-27 2020-04-15 Neutral line overlapping mechanism and dual-power automatic transfer switch comprising same Active CN212084864U (en)

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CN2020202226338 2020-02-27

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CN202010294099.6A Pending CN113314362A (en) 2020-02-27 2020-04-15 Neutral line overlapping mechanism and dual-power automatic transfer switch comprising same

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Publication number Priority date Publication date Assignee Title
CN204577267U (en) * 2015-04-29 2015-08-19 深圳市泰永电气科技有限公司 The overlapping switching mechanism of neutral pole and automatic transfer switching electric appliance
CN106783284B (en) * 2015-11-24 2018-12-21 施耐德电气工业公司 Dual-power transfer switch
CN110444417B (en) * 2018-05-04 2021-09-21 施耐德电器工业公司 Dual-power transfer switch and switching mechanism thereof
CN208796868U (en) * 2018-09-30 2019-04-26 施耐德电器工业公司 Realize the dual-power transfer switch of neutral pole overlapping conversion

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