Neutral line overlapping mechanism and double power automatic transfer switch comprising same

Abstract

A dual power automatic transfer switch and a neutral line overlapping mechanism thereof, the dual power automatic transfer switch comprising a first static contact assembly and a first dynamic contact assembly, a second static contact assembly and a second dynamic contact assembly; wherein the neutral line overlapping mechanism comprises a first pull rod assembly and a second pull rod assembly, a first neutral pole dynamic contact assembly and a first neutral pole static contact assembly, and a second neutral pole dynamic contact assembly and a second neutral pole static contact assembly, and is configured such that when the dual power automatic transfer switch is in a double-break position, one of the neutral poles is in an on state; when the dual power automatic transfer switch is in a break operation, the first neutral pole dynamic contact assembly and the second neutral pole dynamic contact assembly do not act; when the dual power automatic transfer switch is in a close operation, the first neutral pole dynamic contact assembly and the second neutral pole dynamic contact assembly are linked with the first dynamic contact assembly or the second neutral pole dynamic contact assembly and the first neutral pole dynamic contact assembly are linked with the second dynamic contact assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a neutral line overlap mechanism of a dual power automatic transfer switch and a dual power automatic transfer switch comprising the same. BACKGROUND

[0002] Dual power automatic transfer switches (ATS) can be divided into two types according to the conversion mode of the neutral line: ATSs with simultaneous conversion of other poles and neutral line overlap switching type ATSs in which the neutral pole of the load is connected to the neutral line of power source 1 or 2 at least during the power conversion process. Neutral line overlap switching is highly valued because it avoids system instability caused by the short suspension of the neutral pole of the load when the ATS switches. Many manufacturers and research institutions have proposed neutral line overlap switching technologies. However, for three-position ATSs (i.e., with power source 1 combined, power source 2 combined, and two-position split), when in the two-position split, whether the neutral pole of the load is connected to the neutral line of one power source or both power sources is completely different technical solutions. If the latter, the neutral line may be overlapped for a long time during the conversion of the ATS, and the excessively long overlap time may cause misoperation of the upper-level leakage sensor and the adverse effects of the resulting stray current on the system.

[0003] The neutral line overlap scheme provided by the present technology is suitable for both two-position and three-position ATSs, has a simple structure, and is short and reliable, and meets the system requirements regardless of the conversion form of the ATS. SUMMARY

[0004] To solve one or more of the above-mentioned defects in the prior art, according to one aspect of the present disclosure, a neutral line overlap mechanism of a dual power automatic transfer switch is provided, the dual power automatic transfer switch comprising a first static contact assembly and a first dynamic contact assembly, a second static contact assembly and a second dynamic contact assembly.

[0005] The neutral line overlap mechanism comprises a first pull rod assembly and a second pull rod assembly, a first neutral pole dynamic contact assembly and a first neutral pole static contact assembly, and a second neutral pole dynamic contact assembly and a second neutral pole static contact assembly.

[0006] Through the cooperation of the first pull rod assembly with the first dynamic contact assembly, the first neutral pole dynamic contact assembly, and the second neutral pole dynamic contact assembly, and through the cooperation of the second pull rod assembly with the second dynamic contact assembly, the second neutral pole dynamic contact assembly, and the first neutral pole dynamic contact assembly, the following is achieved:

[0007] When the dual power automatic transfer switch is in a two-position split, one of the neutral poles is in an on state.

[0008] When the dual-power automatic transfer switch performs a tripping operation, the first neutral pole moving contact assembly and the second neutral pole moving contact assembly do not operate.

[0009] When the first power supply of the dual-power automatic transfer switch is closed, the first neutral moving contact assembly and the first moving contact assembly are linked together.

[0010] When the second power supply of the dual-power automatic transfer switch is closed, the second neutral pole moving contact assembly and the second moving contact assembly are linked together.

[0011] According to the above aspects of this disclosure, the first neutral polarity moving contact assembly includes a first neutral polarity moving contact, a first neutral polarity moving contact support, and a first neutral polarity support actuating piece.

[0012] The first neutral pole moving contact is held on the first neutral pole moving contact support, and the first neutral pole support actuating piece is connected to the first neutral pole moving contact support.

[0013] The second neutral polarity moving contact assembly includes a second neutral polarity moving contact, a second neutral polarity moving contact support, and a second neutral polarity support actuating piece.

[0014] 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.

[0015] According to the various aspects of this disclosure described above, the first pull rod assembly includes a first power supply first pull rod and a first power supply second pull rod.

[0016] The first power supply first pull rod and the first power supply second pull rod are connected to the first moving contact assembly and can drive the first moving contact assembly to close or separate from the first stationary contact assembly.

[0017] The second pull rod assembly includes a second power supply first pull rod and a second power supply second pull rod.

[0018] The second power supply first pull rod and the second power supply second pull rod are connected to the second moving contact assembly and can drive the second moving contact assembly to close or separate from the second stationary contact assembly.

[0019] According to the above aspects of this disclosure, the first neutral electrode support actuator is provided with a first neutral electrode first boss and a first neutral electrode second boss.

[0020] The first protrusion of the first neutral electrode engages with the second pull rod of the first power supply.

[0021] The second protrusion of the first neutral electrode cooperates with the second pull rod of the second power supply.

[0022] The second neutral electrode support actuator plate is provided with a second neutral electrode first protrusion and a second neutral electrode second protrusion.

[0023] The first protrusion of the second neutral electrode engages with the first pull rod of the second power supply.

[0024] The second neutral electrode's second protrusion engages with the first power supply's first pull rod.

[0025] According to the above aspects of this disclosure, the first neutral electrode first protrusion and the first neutral electrode second protrusion are coaxially arranged, and the diameter of the first neutral electrode first protrusion is larger than the diameter of the first neutral electrode second protrusion.

[0026] The first protrusion of the second neutral electrode and the second protrusion of the second neutral electrode are arranged on the same axis, and the diameter of the first protrusion of the second neutral electrode is larger than the diameter of the second protrusion of the second neutral electrode.

[0027] According to the above aspects of this disclosure, an elongated closed-shaped first power supply first pull rod hole is provided on the first power supply first pull rod.

[0028] A slender, closed-shaped first power supply second pull rod hole is provided on the first power supply second pull rod.

[0029] The length of the first pull rod hole of the first power supply is less than the length of the second pull rod hole of the first power supply.

[0030] A slender, closed-shaped second power supply first pull rod hole is provided on the second power supply first pull rod.

[0031] A slender, closed-shaped second power supply second pull rod hole is provided on the second power supply second pull rod.

[0032] The length of the first pull rod hole of the second power supply is greater than the length of the second pull rod hole of the second power supply.

[0033] According to the foregoing aspects of this disclosure, the first neutral electrode first protrusion only fits into the first power supply second pull rod hole.

[0034] The first neutral electrode second protrusion only fits into the second power supply second pull rod hole.

[0035] The first protrusion of the second neutral electrode fits only into the first pull rod hole of the second power supply.

[0036] The second neutral electrode second protrusion only fits into the first pull rod hole of the first power supply.

[0037] The length of the first pull rod hole of the first power supply is equal to the length of the second pull rod hole of the second power supply.

[0038] The length of the second pull rod hole of the first power supply is equal to the length of the first pull rod hole of the second power supply.

[0039] According to the foregoing aspects of this disclosure, the first neutral polar contact assembly includes a first neutral polar contact inlet and a first neutral polar contact outlet.

[0040] One end of the first neutral moving contact is in contact with either the inlet end of the first neutral stationary contact or the outlet end of the first neutral stationary contact.

[0041] The other end of the first neutral moving contact can be in contact with or separated from the other of the first neutral stationary contact's inlet and outlet ends.

[0042] The second neutral polar stationary contact assembly includes a second neutral polar stationary contact inlet and a second neutral polar stationary contact outlet.

[0043] One end of the second neutral pole moving contact is in contact with one of the inlet end of the second neutral pole stationary contact and the outlet end of the second neutral pole stationary contact.

[0044] The other end of the second neutral moving contact can be in contact with or separated from the other of the second neutral stationary contact inlet and outlet terminals.

[0045] By changing the neutral electrode from a double-break to a single-break electrode, with only one side maintaining contact, the neutral electrode is provided with holding force in the open position (i.e., open limit).

[0046] Those skilled in the art will also understand that by widening the stationary contact of the neutral electrode and reducing the opening distance, the contact stroke can be increased, ensuring that the neutral electrode closes before the P electrode (phase electrode).

[0047] Furthermore, the neutral pole moving and stationary contacts according to this disclosure can be pre-assembled as components without the need for special tools or fixtures. This minimizes the impact on assembly difficulty and time.

[0048] According to the foregoing aspects of this disclosure, no arc-extinguishing grid is provided on the first neutral moving contact and the second neutral stationary contact.

[0049] According to another aspect of this disclosure, the first neutral electrode holder actuating plate and the second neutral electrode holder actuating plate are integrally formed and connected together by a first connecting post and a second connecting post.

[0050] According to another aspect of this disclosure, an elongated, open-shaped slot is provided on the first power supply first pull rod.

[0051] A slender, open slot is provided on the first power supply second pull rod.

[0052] The length of the slot in the first pull rod of the first power supply is equal to the length of the slot in the second pull rod of the first power supply.

[0053] A slender, open slot is provided on the first pull rod of the second power supply.

[0054] A slender, open-shaped slot is provided on the second power supply second pull rod.

[0055] The length of the slot in the first pull rod of the second power supply is equal to the length of the slot in the second pull rod of the second power supply.

[0056] According to another aspect of this disclosure, the first connecting post is fitted into the first power supply first pull rod slot and the second power supply first pull rod slot.

[0057] The second connecting post is fitted into the first power supply second pull rod slot and the second power supply second pull rod slot.

[0058] The length of the slot in the first pull rod of the first power supply is equal to the length of the slot in the second pull rod of the second power supply.

[0059] The length of the slot in the second pull rod of the first power supply is equal to the length of the slot in the first pull rod of the second power supply.

[0060] The first neutral pole moving contact assembly and the second neutral pole moving contact assembly are connected as a whole by an intermediate turntable (i.e., the first neutral pole support actuating piece and the second neutral pole support actuating piece are integrally formed and connected together by a first connecting post and a second connecting post). The open position of the first neutral pole moving contact assembly corresponds to the closed position of the second neutral pole moving contact assembly. The closed position of the second neutral pole moving contact assembly is limited by the contact clamping force, which also limits the open position of the first neutral pole moving contact assembly. Conversely, the open position of the second neutral pole moving contact assembly is limited by the closed position of the first neutral pole contact assembly.

[0061] According to this disclosure, when the dual-power automatic transfer switch switches between two power sources, when the switch is closed, it can simultaneously drive ABC (three phase poles) + N1 / N2 (two neutral poles), and when it is open, it only drives its own ABC (three phase poles). That is, when the switch operates once, it can simultaneously drive 5 switches (when closed) or drive 3 switches (when open).

[0062] Based on the above-described technology of this disclosure, a simple structure is achieved, and the neutral line overlap time during conversion is short and stable.

[0063] According to another aspect of this disclosure, a dual-power automatic transfer switch is proposed, the dual-power automatic transfer switch including the neutral line overlap mechanism as described in the above aspects.

[0064] Thus, in order to provide a better understanding of the detailed description herein and to better recognize the contribution of this disclosure to the prior art, the contents of this disclosure have been summarized quite broadly. Embodiments of this disclosure will, of course, be described below and will form the subject matter of the appended claims.

[0065] Similarly, those skilled in the art will recognize that the concepts upon which this disclosure is based can be readily used as the basis for designing other structures, methods, and systems for carrying out several purposes of this disclosure. Therefore, it is important that the appended claims be considered to include such equivalent structures, provided they do not exceed the spirit and scope of this disclosure. Attached Figure Description

[0066] The advantages of this disclosure will be more clearly demonstrated by the accompanying drawings, which will provide a better understanding of the present disclosure. The drawings described herein are for illustrative purposes only, representing selected embodiments and not all possible implementations, and are not intended to limit the scope of this disclosure.

[0067] Figure 1 A perspective assembly view of a neutral line overlap mechanism for a dual-power automatic transfer switch according to a first embodiment of the present disclosure is shown.

[0068] Figure 2 Show Figure 1 Exploded 3D diagram;

[0069] Figure 3 Show Figure 2 A simplified diagram;

[0070] Figure 4 This shows that the neutral electrode has been changed from a double fracture surface to a single fracture surface, with only one side maintaining contact.

[0071] Figure 5 A perspective assembly view of a neutral line overlap mechanism according to a second embodiment of the present disclosure is shown;

[0072] Figure 6 Show Figure 5 A simplified diagram;

[0073] Figure 7The first neutral electrode holder actuator piece and the second neutral electrode holder actuator piece, as shown in the second embodiment of the present disclosure, are integrally formed and connected together by a first connecting post and a second connecting post.

[0074] Figure 8 A perspective assembly view of a neutral line overlap mechanism for a dual-power automatic transfer switch according to a second embodiment of the present disclosure is shown.

[0075] Figure 9 Show Figure 8 3D exploded view;

[0076] Figure 10 Show Figure 9 A simplified diagram;

[0077] Figure 11 The text is incomplete and contains errors. A more accurate translation would require the full context. Figure 8 A three-dimensional assembly drawing of the first and second tie rod assemblies;

[0078] Figure 12 A first neutral electrode holder actuating piece and a second neutral electrode holder actuating piece are shown according to a first embodiment of the present disclosure. Detailed Implementation

[0079] The embodiments according to this disclosure are described in detail below with reference to the accompanying drawings.

[0080] Figure 1 A perspective assembly view of a neutral line overlap mechanism of a dual-power automatic transfer switch according to a first embodiment of the present disclosure is shown. The dual-power automatic transfer switch includes a first stationary contact assembly 7 and a first moving contact assembly 8, a second stationary contact assembly 9 and a second moving contact assembly 10.

[0081] The neutral line overlap mechanism includes a first pull rod assembly 1 and a second pull rod assembly 2, a first neutral pole moving contact assembly 3 and a first neutral pole stationary contact assembly 4, a second neutral pole moving contact assembly 5 and a second neutral pole stationary contact assembly 6.

[0082] Through the cooperation of the first pull rod assembly 1 with the first moving contact assembly 8, the first neutral pole moving contact assembly 3, and the second neutral pole moving contact assembly 5, and through the cooperation of the second pull rod assembly 2 with the second moving contact assembly 10, the second neutral pole moving contact assembly 5, and the first neutral pole moving contact assembly 3, the following can be achieved:

[0083] When the dual-power automatic transfer switch is in the dual-open position, one of the neutral poles is in the ON state, that is, the first neutral pole moving contact assembly 3 and the first neutral pole stationary contact assembly 4 are in the ON state or the second neutral pole moving contact assembly 5 and the second neutral pole stationary contact assembly 6 are in the ON state.

[0084] When the dual-power automatic transfer switch performs a tripping operation, the first neutral pole moving contact assembly 3 and the second neutral pole moving contact assembly 5 do not operate.

[0085] When the first power supply of the dual-power automatic transfer switch is closed, the first neutral pole moving contact assembly 3 and the first moving contact assembly 8 are linked together.

[0086] When the second power supply of the dual-power automatic transfer switch is closed, the second neutral pole moving contact assembly 5 and the second moving contact assembly 10 are linked together.

[0087] According to the above embodiments of this disclosure, the first neutral polar moving contact assembly 3 includes a first neutral polar moving contact 3-1, a first neutral polar moving contact support 3-2, and a first neutral polar support actuating piece 3-3.

[0088] The first neutral polarity moving contact 3-1 is held on the first neutral polarity moving contact support 3-2, and the first neutral polarity support actuating piece 3-3 is connected to the first neutral polarity moving contact support 3-2, for example... Figure 2 Connected via splines.

[0089] The second neutral polar moving contact assembly 5 includes a second neutral polar moving contact 5-1, a second neutral polar moving contact support 5-2, and a second neutral polar support actuating piece 5-3.

[0090] The second neutral pole moving contact 5-1 is held on the second neutral pole moving contact support 5-2, and the second neutral pole support actuating piece 5-3 is connected to the second neutral pole moving contact support 5-2, for example... Figure 2 Connected via splines.

[0091] According to the various embodiments described above in this disclosure, such as Figure 2 As shown, the first pull rod assembly 1 includes a first power supply first pull rod 1-1 and a first power supply second pull rod 1-2.

[0092] The first power supply first pull rod 1-1 and the first power supply second pull rod 1-2 are connected to the first moving contact assembly 8 and can drive the first moving contact assembly 8 to close or separate from the first stationary contact assembly 7.

[0093] The second pull rod assembly 2 includes a second power supply first pull rod 2-1 and a second power supply second pull rod 2-2.

[0094] The second power supply first pull rod 2-1 and the second power supply second pull rod 2-2 are connected to the second moving contact assembly 10 and can drive the second moving contact assembly 10 to close or separate from the second stationary contact assembly 9.

[0095] According to the various embodiments described above in this disclosure, such as Figure 2 , Figure 3 and Figure 12 As shown, the first neutral electrode support actuator plate 3-3 is provided with a first neutral electrode first protrusion 3-3-1 and a first neutral electrode second protrusion 3-3-2. For the purpose of clarity, in Figure 2 and Figure 3 The lengths of the first neutral electrode protrusion 3-3-1 and the second neutral electrode protrusion 3-3-2 are elongated.

[0096] The first neutral electrode first protrusion 3-3-1 cooperates with the first power supply second pull rod 1-2.

[0097] The first neutral electrode second protrusion 3-3-2 cooperates with the second power supply second pull rod 2-2.

[0098] The second neutral electrode support actuator plate 5-3 is provided with a second neutral electrode first protrusion 5-3-1 and a second neutral electrode second protrusion 5-3-2.

[0099] For the purpose of clarity, in Figure 2 and Figure 3 The lengths of the first protrusion 5-3-1 of the second neutral electrode and the second protrusion 5-3-2 of the second neutral electrode are stretched.

[0100] The first protrusion 5-3-1 of the second neutral electrode cooperates with the first pull rod 2-1 of the second power supply.

[0101] The second neutral electrode second protrusion 5-3-2 cooperates with the first power supply first pull rod 1-1.

[0102] According to the above embodiments of this disclosure, the first neutral electrode first protrusion 3-3-1 and the first neutral electrode second protrusion 3-3-2 are coaxially arranged, and the diameter of the first neutral electrode first protrusion 3-3-1 is larger than the diameter of the first neutral electrode second protrusion 3-3-2.

[0103] The first protrusion 5-3-1 and the second protrusion 5-3-2 of the second neutral electrode are coaxially arranged, and the diameter of the first protrusion 5-3-1 of the second neutral electrode is larger than the diameter of the second protrusion 5-3-2 of the second neutral electrode.

[0104] According to the various embodiments of this disclosure described above, an elongated closed-shaped first power supply first pull rod hole 1-1-1 is provided on the first power supply first pull rod 1-1.

[0105] A slender, closed-shaped first power supply second pull rod hole 1-2-1 is provided on the first power supply second pull rod 1-2.

[0106] The length of the first pull rod hole 1-1-1 of the first power supply is less than the length of the second pull rod hole 1-2-1 of the first power supply.

[0107] A slender, closed-shaped second power supply first pull rod hole 2-1-1 is provided on the second power supply first pull rod 2-1.

[0108] A slender, closed-shaped second power supply second pull rod hole 2-2-1 is provided on the second power supply second pull rod 2-2.

[0109] The length of the first pull rod hole 2-1-1 of the second power supply is greater than the length of the second pull rod hole 2-2-1 of the second power supply.

[0110] According to the above embodiments of this disclosure, the first neutral electrode first protrusion 3-3-1 is only fitted into the hole of the first power supply second pull rod 1-2-1.

[0111] The first neutral electrode second protrusion 3-3-2 is only fitted into the second power supply second pull rod hole 2-2-1.

[0112] The second neutral electrode first protrusion 5-3-1 is only fitted into the second power supply first pull rod hole 2-1-1.

[0113] The second neutral electrode second protrusion 5-3-2 is only fitted into the first power supply first pull rod hole 1-1-1.

[0114] The length of the first pull rod hole 1-1-1 of the first power supply is equal to the length of the second pull rod hole 2-2-1 of the second power supply.

[0115] The length of the second pull rod hole 1-2-1 of the first power supply is equal to the length of the first pull rod hole 2-1-1 of the second power supply.

[0116] According to the various embodiments described above, the first neutral polar contact assembly 4 includes a first neutral polar contact inlet terminal 4-1 and a first neutral polar contact outlet terminal 4-2.

[0117] One end of the first neutral moving contact 3-1 is in contact with one of the first neutral stationary contact inlet end 4-1 and the first neutral stationary contact outlet end 4-2.

[0118] The other end of the first neutral moving contact 3-1 can be in contact with or separated from the other of the first neutral stationary contact inlet end 4-1 and the first neutral stationary contact outlet end 4-2.

[0119] like Figure 4As shown, one end of the first neutral pole moving contact 3-1 is always in contact with the output end 4-2 of the first neutral pole stationary contact, while the other end of the first neutral pole moving contact 3-1 can be in contact with or separated from the input end 4-1 of the first neutral pole stationary contact.

[0120] The second neutral polar contact assembly 6 includes a second neutral polar contact inlet terminal 6-1 and a second neutral polar contact outlet terminal 6-2.

[0121] One end of the second neutral moving contact 5-1 is in contact with one of the second neutral stationary contact inlet end 6-1 and the second neutral stationary contact outlet end 6-2.

[0122] The other end of the second neutral moving contact 5-1 can be in contact with or separated from the other of the second neutral stationary contact inlet end 6-1 and the second neutral stationary contact outlet end 6-2.

[0123] like Figure 4 As shown, one end of the second neutral pole moving contact 5-1 is always in contact with the output end 6-2 of the second neutral pole stationary contact, while the other end of the second neutral pole moving contact 5-1 can be in contact with or separated from the input end 6-1 of the second neutral pole stationary contact.

[0124] By changing the neutral electrode from a double-break to a single-break electrode, with only one side maintaining contact, the neutral electrode is provided with holding force in the open position (i.e., open limit).

[0125] Those skilled in the art will also understand that by widening the stationary contact of the neutral electrode and reducing the opening distance, the contact stroke can be increased, ensuring that the neutral electrode closes before the P electrode (phase electrode).

[0126] Furthermore, the neutral pole moving and stationary contacts according to this disclosure can be pre-assembled as components without the need for special tools or fixtures. This minimizes the impact on assembly difficulty and time.

[0127] According to the various embodiments described above in this disclosure, such as Figure 4 As shown, no arc-extinguishing grid is provided on the first neutral stationary contact 4 and the second neutral stationary contact 6.

[0128] According to another embodiment of this disclosure, such as Figures 5 to 11 As shown, the same structures as those in the above embodiments have the same reference numerals in this embodiment. The difference between this embodiment and the above embodiments is that the first neutral electrode support actuator 3-3 and the second neutral electrode support actuator 5-3 are integrally formed and connected together by the first connecting post 11 and the second connecting post 12. Figures 9-10In the middle, for the purpose of clarity, the first connecting post 11 and the second connecting post 12 are elongated.

[0129] According to another embodiment of the present disclosure described above, an elongated open slot 1-1-2 is provided on the first power supply first pull rod 1-1.

[0130] A slender, open slot 1-2-2 is provided on the first power supply second pull rod 1-2.

[0131] The length of the first pull rod slot 1-1-2 of the first power supply is equal to the length of the second pull rod slot 1-2-2 of the first power supply.

[0132] A slender, open slot 2-1-2 is provided on the first pull rod 2-1 of the second power supply.

[0133] A slender, open slot 2-2-2 is provided on the second power supply second pull rod 2-2.

[0134] The length of the first pull rod slot 2-1-2 of the second power supply is equal to the length of the second pull rod slot 2-2-2 of the second power supply.

[0135] According to another embodiment of the present disclosure, the first connecting post 11 is fitted into the first power supply first pull rod slot 1-1-2 and the second power supply first pull rod slot 2-1-2.

[0136] The second connecting post 12 is fitted into the first power supply second pull rod slot 1-2-2 and the second power supply second pull rod slot 2-2-2.

[0137] The length of the first pull rod slot 1-1-2 of the first power supply is equal to the length of the second pull rod slot 2-2-2 of the second power supply.

[0138] The length of the slot 1-2-2 of the second pull rod of the first power supply is equal to the length of the slot 2-1-2 of the first pull rod of the second power supply.

[0139] The first neutral pole moving contact assembly 3 and the second neutral pole moving contact assembly 5 are connected as a whole by an intermediate turntable (i.e., the first neutral pole support actuating piece and the second neutral pole support actuating piece are integrally formed and connected together by the first connecting post and the second connecting post). The open position of the first neutral pole moving contact assembly 3 corresponds to the closed position of the second neutral pole moving contact assembly 5. The closed position of the second neutral pole moving contact assembly 5 is limited by the contact clamping force, which also limits the open position of the first neutral pole moving contact assembly 3. Conversely, the open position of the second neutral pole moving contact assembly 5 is limited by the closed position of the first neutral pole moving contact assembly 3.

[0140] The sequence of actions in the first embodiment will now be described in detail with reference to the accompanying drawings.

[0141] exist Figure 1 and Figure 2 In this configuration, the first power supply of the dual-power automatic transfer switch is in the closed state, meaning the first moving contact assembly 8 is in contact with the first stationary contact assembly 7 (phase line closed) and the first neutral moving contact assembly 3 and the first neutral stationary contact assembly 4 are in contact (neutral line closed). Meanwhile, the second power supply of the dual-power automatic transfer switch is in the open state, meaning the second moving contact assembly 10 is not in contact with the second stationary contact assembly 9 (phase line open) and the second neutral moving contact assembly 5 and the second neutral stationary contact assembly 6 are not connected. When the neutral pole is opened, the first neutral pole first boss 3-3-1 abuts against one edge of the first power supply second pull rod hole 1-2-1, the second neutral pole second boss 5-3-2 abuts against one edge of the first power supply first pull rod hole 1-1-1, the second neutral pole first boss 5-3-1 abuts against one edge of the second power supply first pull rod hole 2-1-1, and the first neutral pole second boss 3-3-2 abuts against one edge of the second power supply second pull rod hole 2-2-1.

[0142] When the first power supply changes from the closed state to the open state, the first pull rod 1-1 of the first power supply moves to the right, the second pull rod 1-2 of the first power supply moves to the left, the first pull rod 2-1 of the second power supply remains stationary, the second pull rod 2-2 of the second power supply remains stationary, and the first moving contact assembly 8 and the first stationary contact assembly 7 begin to separate (phase line pole separation). Because of the presence 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 will not move, but will 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. Thus, the first neutral pole moving contact assembly 3 and the first neutral pole stationary contact assembly 4 remain in contact (neutral pole remains closed), the second neutral pole moving contact assembly 5 and the second neutral pole stationary contact assembly 6 remain in non-contact (neutral pole remains open), and the second moving contact assembly 10 and the second stationary contact assembly 9 remain in non-contact (phase pole open).

[0143] When the phase line of the first power supply is disconnected, the first protrusion 3-3-1 of the first neutral pole abuts against the other edge of the second pull rod hole 1-2-1 of the first power supply, and the second protrusion 5-3-2 of the second neutral pole abuts against the other edge of the first pull rod hole 1-1-1 of the first power supply. The phase line of the second power supply begins to close, that is, the first pull rod 2-1 of the second power supply begins to move to the right, and at the same time, the second pull rod 2-2 of the second power supply moves to the left, while the first pull rod 1-1 of the first power supply remains stationary, and the first pull rod 1-2 of the first power supply also remains stationary. The first pull rod hole 2-1-1 and the second pull rod hole 2-2-1 of the second power supply respectively actuate the first protrusion 5-3-1 and the second pull rod hole 1-2-1 of the second neutral pole. A neutral pole second protrusion 3-3-2, a first neutral pole first protrusion 3-3-1 near one edge of the first power supply second pull rod hole 1-2-1, and a second neutral pole second protrusion 5-3-2 near one edge of the first power supply first pull rod hole 1-1-1, thereby separating the first neutral pole moving contact assembly 3 and the first neutral pole stationary contact assembly 4 (neutral pole open), contacting the second neutral pole moving contact assembly 5 and the second neutral pole stationary contact assembly 6 (neutral pole close), contacting the second moving contact assembly 10 and the second stationary contact assembly 9 (phase line close), and keeping the first moving contact assembly 8 and the first stationary contact assembly 7 out of contact (phase line open).

[0144] The above steps complete the transition from the first power supply of the dual-power automatic transfer switch being in the closed state to the open state, and then to the second power supply of the dual-power automatic transfer switch being in the closed state.

[0145] Those skilled in the art will understand that the switching process from the second power supply of the dual-power automatic transfer switch being in the closed state to the open state and then back to the first power supply of the dual-power automatic transfer switch being in the closed state is the reverse of the above process.

[0146] According to this disclosure, when the dual-power automatic transfer switch switches between two power sources, when the switch is closed, it can simultaneously drive ABC (three phase poles) + N1 / N2 (two neutral poles), and when it is open, it only drives its own ABC (three phase poles). That is, when the switch operates once, it can simultaneously drive 5 switches (when closed) or drive 3 switches (when open).

[0147] Based on the above-described technology of this disclosure, a simple structure is achieved with short and stable neutral line overlap time during conversion.

[0148] According to yet another embodiment of this disclosure, a dual-power automatic transfer switch is proposed, the dual-power automatic transfer switch including the neutral line overlap mechanism as described in the above embodiments.

[0149] Referring to specific embodiments, although this disclosure has been described in the specification and drawings, it should be understood that various changes and equivalents can be made by those skilled in the art without departing from the scope of this disclosure as defined in the claims, and various elements can be substituted. Moreover, the combinations and pairings of technical features, elements, and / or functions among the specific embodiments herein are clear and obvious; therefore, based on this disclosure, those skilled in the art can understand that the technical features, elements, and / or functions of the embodiments can be incorporated into another specific embodiment as appropriate, unless otherwise described above. Furthermore, based on the teachings of this disclosure, many changes can be made to suit specific circumstances or materials without departing from the essence of this disclosure. Therefore, this disclosure is not limited to the individual specific embodiments illustrated in the drawings, or the specific embodiments described in the specification as the best mode contemplated for carrying out this disclosure, but is intended to include all embodiments falling within the scope of the foregoing specification and the appended claims.

Claims

1. A neutral line overlap mechanism for a dual-power automatic transfer switch, the dual-power automatic transfer switch comprising a first stationary contact assembly and a first moving contact assembly, a second stationary contact assembly and a second moving contact assembly; characterized in that, The neutral line overlap mechanism includes a first pull rod assembly and a second pull rod assembly, a first neutral pole moving contact assembly and a first neutral pole stationary contact assembly, as well as a second neutral pole moving contact assembly and a second neutral pole stationary contact assembly. Through the cooperation of the first pull rod assembly with the first moving contact assembly, the first neutral pole moving contact assembly, and the second neutral pole moving contact assembly, and through the cooperation of the second pull rod assembly with the second moving contact assembly, the second neutral pole moving contact assembly, and the first neutral pole moving contact assembly, the following can be achieved: When the dual power supply automatic transfer switch is in the dual open position, one of the neutral poles is in the ON state; When the dual-power automatic transfer switch performs a tripping operation, the first neutral pole moving contact assembly and the second neutral pole moving contact assembly do not operate; When the first power supply of the dual power automatic transfer switch is closed, the first neutral pole moving contact assembly and the first moving contact assembly are linked together. When the second power supply of the dual power automatic transfer switch performs a closing operation, the second neutral pole moving contact assembly and the second moving contact assembly are linked together; The first neutral polar static contact assembly includes a first neutral polar static contact inlet and a first neutral polar static contact outlet. One end of the first neutral pole moving contact is in contact with one of the inlet end of the first neutral pole stationary contact and the outlet end of the first neutral pole stationary contact; The other end of the first neutral pole moving contact can be in contact with or separated from the other of the first neutral pole stationary contact inlet and outlet ends. The second neutral stationary contact assembly includes a second neutral stationary contact inlet and a second neutral stationary contact outlet. One end of the second neutral pole moving contact is in contact with one of the inlet end of the second neutral pole stationary contact and the outlet end of the second neutral pole stationary contact; The other end of the second neutral moving contact can be in contact with or separated from the other of the second neutral stationary contact inlet and outlet terminals.

2. The neutral line overlap mechanism according to claim 1, characterized in that, The first neutral polar moving contact assembly includes a first neutral polar moving contact, a first neutral polar moving contact support, and a first neutral polar support actuating piece; The first neutral pole moving contact is held on the first neutral pole moving contact support, and the first neutral pole support actuator is connected to the first neutral pole moving contact support; The second neutral polarity moving contact assembly includes a second neutral polarity moving contact, a second neutral polarity moving contact support, and a second neutral polarity support actuating piece; 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 line overlap mechanism according to claim 2, characterized in that, The first pull rod assembly includes 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 moving contact assembly and can drive the first moving contact assembly to close or separate from the first stationary contact assembly; The second pull rod assembly includes 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 moving contact assembly and can drive the second moving contact assembly to close or separate from the second stationary contact assembly.

4. The neutral line overlap mechanism according to claim 3, characterized in that, The first neutral electrode support actuator plate is provided with a first neutral electrode first protrusion and a first neutral electrode second protrusion; The first neutral electrode first protrusion engages with the first power supply second pull rod; The second protrusion of the first neutral electrode cooperates with the second pull rod of the second power supply. The second neutral electrode support actuator plate is provided with a second neutral electrode first protrusion and a second neutral electrode second protrusion; The first protrusion of the second neutral electrode cooperates with the first pull rod of the second power supply; The second neutral electrode's second protrusion engages with the first power supply's first pull rod.

5. The neutral line overlap mechanism according to claim 4, characterized in that, The first neutral electrode first protrusion and the first neutral electrode second protrusion are coaxially arranged, and the diameter of the first neutral electrode first protrusion is larger than the diameter of the first neutral electrode second protrusion. The first protrusion of the second neutral electrode and the second protrusion of the second neutral electrode are arranged on the same axis, and the diameter of the first protrusion of the second neutral electrode is larger than the diameter of the second protrusion of the second neutral electrode.

6. The neutral line overlap mechanism according to claim 5, characterized in that, A slender, closed-shaped first power supply first pull rod hole is provided on the first power supply first pull rod; A slender, closed-shaped first power supply second pull rod hole is provided on the first power supply second pull rod; The length of the first pull rod hole of the first power supply is less than the length of the second pull rod hole of the first power supply. A slender, closed-shaped second power supply first pull rod hole is provided on the second power supply first pull rod; A slender, closed-shaped second power supply second pull rod hole is provided on the second power supply second pull rod; The length of the first pull rod hole of the second power supply is greater than the length of the second pull rod hole of the second power supply.

7. The neutral line overlap mechanism according to claim 6, characterized in that, The first neutral electrode first protrusion only fits into the second pull rod hole of the first power supply; The second protrusion of the first neutral electrode only fits into the second pull rod hole of the second power supply. The second neutral electrode first protrusion only fits into the second power supply first pull rod hole; The second neutral electrode protrusion fits only into the first pull rod hole of the first power supply. The length of the first pull rod hole of the first power supply is equal to the length of the second pull rod hole of the second power supply; The length of the second pull rod hole of the first power supply is equal to the length of the first pull rod hole of the second power supply.

8. The neutral line overlap mechanism according to claim 7, characterized in that, No arc-extinguishing grid is provided on the first neutral moving contact and the second neutral stationary contact.

9. The neutral line overlap mechanism according to claim 3, characterized in that, The first neutral electrode support actuator and the second neutral electrode support actuator are integrally formed and connected together by the first connecting post and the second connecting post.

10. The neutral line overlap mechanism according to claim 9, characterized in that, A slender, open-shaped slot is provided on the first power supply first pull rod; A slender, open-shaped slot is provided on the first power supply second pull rod; The length of the slot in the first pull rod of the first power supply is equal to the length of the slot in the second pull rod of the first power supply. A slender, open-shaped slot is provided on the first pull rod of the second power supply. A slender, open-shaped slot is provided on the second power supply second pull rod; The length of the slot in the first pull rod of the second power supply is equal to the length of the slot in the second pull rod of the second power supply.

11. The neutral line overlap mechanism according to claim 10, characterized in that, The first connecting post is fitted into the first pull rod slot of the first power supply and the first pull rod slot of the second power supply; The second connecting post is fitted into the first power supply second pull rod slot and the second power supply second pull rod slot; The length of the slot in the first pull rod of the first power supply is equal to the length of the slot in the second pull rod of the second power supply. The length of the slot in the second pull rod of the first power supply is equal to the length of the slot in the first pull rod of the second power supply.

12. A dual-power automatic transfer switch, characterized in that, The dual-power automatic transfer switch includes a neutral line overlap mechanism as described in any one of claims 1 to 11.

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