CN112216564A - Small-sized leakage circuit breaker with modular structure - Google Patents

Small-sized leakage circuit breaker with modular structure Download PDF

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Publication number
CN112216564A
CN112216564A CN201910612715.5A CN201910612715A CN112216564A CN 112216564 A CN112216564 A CN 112216564A CN 201910612715 A CN201910612715 A CN 201910612715A CN 112216564 A CN112216564 A CN 112216564A
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CN
China
Prior art keywords
circuit breaker
small
tripping
pole
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910612715.5A
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Chinese (zh)
Inventor
冷岩
卢瑞明
付想
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Mingri Electrical Equipment Co ltd
Original Assignee
Beijing Mingri Electrical Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Mingri Electrical Equipment Co ltd filed Critical Beijing Mingri Electrical Equipment Co ltd
Priority to CN201910612715.5A priority Critical patent/CN112216564A/en
Publication of CN112216564A publication Critical patent/CN112216564A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02Housings; Casings; Bases; Mountings
    • H01H71/0207Mounting or assembling the different parts of the circuit breaker

Abstract

The invention relates to a small-sized residual current circuit breaker with a modular structure, which comprises a shell, a handle, a connecting rod action mechanism, an electromagnetic tripping mechanism, a contact arc extinguishing mechanism, a time delay tripping module, a zero sequence current transformer module, a residual current control circuit board module, a standby current transformer module and an intelligent control circuit board module. Various modules can carry out different combinations as required to set up for miniature leakage circuit breaker, intelligent miniature circuit breaker or miniature circuit breaker in the shell of same structure. This kind of modular structure's setting has utilized the general accessories of miniature circuit breaker series product furthest, and according to miniature leakage circuit breaker, intelligent miniature circuit breaker and miniature circuit breaker's different technical characterstic, and use different module combination to go to produce miniature leakage circuit breaker, intelligent miniature circuit breaker and miniature circuit breaker simultaneously again to be fit for the large-scale standardized production of mill, simplified the production technology of miniature circuit breaker series product, brought very big convenience for use and maintenance simultaneously.

Description

Small-sized leakage circuit breaker with modular structure
Technical Field
The invention belongs to the field of low-voltage electric appliances, and particularly relates to a small residual current circuit breaker with a modular structure.
Background
A small residual current circuit breaker is a commonly used low-voltage electrical appliance, and is generally used for switching on and off a load circuit and performing short circuit, overload and leakage protection on the load circuit. The small-sized leakage circuit breaker, the intelligent small-sized circuit breaker and the small-sized circuit breaker form a small-sized circuit breaker series product, the structures of the small-sized leakage circuit breaker, the intelligent small-sized circuit breaker and the small-sized circuit breaker are the same and different, the conventional small-sized leakage circuit breaker, the intelligent small-sized circuit breaker and the small-sized circuit breaker are respectively formed into a system, and the small-sized leakage circuit breaker, the intelligent small-sized circuit breaker and the small-sized circuit breaker are respectively provided with a shell, parts and production processes, so that the parts and parts of the small-.
Disclosure of Invention
The invention aims to overcome the defects of various parts, complex production process and difficult use and maintenance of series products of the traditional miniature circuit breaker, and provides a miniature leakage circuit breaker with a modular structure.
The technical scheme adopted by the invention is as follows:
a small-sized leakage circuit breaker with a modular structure comprises a shell, a handle, a connecting rod action mechanism, an electromagnetic tripping mechanism, a contact arc extinguishing mechanism, a delay tripping module, a zero sequence current transformer module, a leakage control circuit board module, a standby current transformer module and an intelligent control circuit board module;
the various modules can be combined differently according to the needs of products, so that a small residual current circuit breaker, an intelligent small circuit breaker or a small circuit breaker is arranged in the shell with the same structure;
particularly, will small-size earth leakage circuit breaker's zero sequence current transformer module repacking is the current transformer module, earth leakage control circuit board module repacking for intelligent control circuit board module, remove delay tripping module simultaneously, small-size earth leakage circuit breaker set up into intelligent small-size circuit breaker promptly, current transformer, intelligent control circuit board and earth leakage tripping device constitute intelligent tripping device this moment, can realize the long time delay of circuit breaker high accuracy, short time delay, instantaneous three-section protection automatically. Particularly, will small-size earth leakage circuit breaker's zero sequence current transformer module, electric leakage control circuit board module remove, small-size earth leakage circuit breaker set up to small-size circuit breaker promptly, long time delay protection can be gone on through time delay tripping module this moment, short time delay and instantaneous protection can be gone on through the electromagnetism release.
Further setting, electromagnetic tripping mechanism include coil skeleton, electromagnetic tripping coil, electric leakage tripping coil, quiet iron core, move iron core, yoke, magnetism tripping core, electromagnetic tripping push rod and electric leakage tripping push rod, coil skeleton be the circular coil skeleton of the big, the little integral type of one section diameter, electromagnetic tripping coil around putting on the big diameter section of coil skeleton, electric leakage tripping coil around putting on the little diameter section of coil skeleton the port inboard of the big diameter section of coil skeleton has set firmly quiet iron core the inboard cover of the port of the little diameter section of coil skeleton is equipped with move the iron core the port department of the little diameter section of coil skeleton has set firmly the yoke the inboard cover of the big diameter section of coil skeleton other end is equipped with magnetism tripping core, magnetism tripping core in be close to a pot head of quiet iron core be equipped with electromagnetic tripping push rod and electromagnetic tripping push rod on the electromagnetic tripping push rod And the electromagnetic tripping push rod is provided with a leakage tripping push rod and a leakage tripping spring on the leakage tripping push rod at one end close to the movable iron core.
Particularly, an electromagnetic tripping coil, a static iron core, a magnetic tripping iron core and an electromagnetic tripping push rod of the electromagnetic tripping mechanism form an electromagnetic tripping device, and the electromagnetic tripping device is used for realizing short delay and instantaneous protection of the miniature circuit breaker;
particularly, the leakage tripping coil, the movable iron core, the magnet yoke and the leakage tripping push rod of the electromagnetic tripping mechanism form a leakage tripping device, the leakage tripping device is a tripping device of a small leakage circuit breaker on the one hand and is also a tripping device of an intelligent small circuit breaker at the same time, the intelligent small circuit breaker collects a load current signal from the leakage tripping coil and processes the load current signal through an intelligent control circuit board, and when the load current and the overcurrent time exceed the threshold value of the long delay or the short delay or the instantaneous protection of the circuit breaker, a control signal is immediately output to trip the circuit breaker, so that the long delay, the short delay and the instantaneous protection of the intelligent small circuit breaker are automatically controlled.
The contact arc extinguishing mechanism further comprises an L-pole moving contact, an L-pole static contact, an L-pole arc extinguishing chamber arranged at the lower part of the L-pole moving contact and the L-pole static contact, an N-pole moving contact, an N-pole static contact and an N-pole arc extinguishing chamber arranged at the lower part of the N-pole moving contact and the N-pole static contact;
the arc extinguishing plates in the L-pole arc extinguishing chamber are arranged in parallel, the lower parts of the arc extinguishing plates are provided with arc striking plates connected with the L-pole moving contacts, and the L-pole arc striking plates and the L-pole form equal potential when the circuit breaker is electrified, so that the breaking arc extinguishing capacity of the L-pole of the circuit breaker can be improved due to the arrangement of the equal-positioning arc extinguishing device;
further, arc extinguishing pieces in the N-pole arc extinguishing chamber are vertically arranged, and arc striking angles are arranged at the lower parts of the N-pole static contacts, so that the arc extinguishing capability of the N pole is improved;
the L-pole arc-extinguishing chamber is arranged on one side in the shell, the N-pole arc-extinguishing chamber is arranged on the other side in the shell, and due to the staggered arrangement of the two arc-extinguishing chambers, L, N poles and L, N pole arc-extinguishing devices can be arranged in a small shell space of the circuit breaker, so that the breaking capacity of the circuit breaker is improved.
Further setting, the shells of the miniature residual current circuit breaker, the intelligent miniature circuit breaker and the miniature circuit breaker are all 1P shells with the same structure and the width of 18mm, and become the minimum assembly unit of miniature circuit breaker series products.
The small-sized leakage circuit breaker with the modular structure has the advantages that:
because this small-size residual current circuit breaker adopts the modularization setting, can conveniently set up to small-size residual current circuit breaker according to the combination of different modules in the shell of same structure, intelligent small-size circuit breaker and miniature circuit breaker, this kind of modular structure's setting, furthest has utilized the general accessories of miniature circuit breaker series product, simultaneously again according to small-size residual current circuit breaker, intelligent small-size circuit breaker and miniature circuit breaker's different technical characterstic and use different module combinations to go to produce small-size residual current circuit breaker, intelligent small-size circuit breaker and miniature circuit breaker, with the large-scale standardized production of suitable mill, the production technology of miniature circuit breaker series product has been simplified, great convenience has been brought for use and maintenance simultaneously.
Drawings
Fig. 1 is an overall structure view of the small residual current circuit breaker of the present invention;
FIG. 2 is a view of the main body of FIG. 1 with the outer shell removed;
FIG. 3 is a plan view of the front structure of FIG. 2;
FIG. 4 is a plan view of the backside structure of FIG. 2;
fig. 5 is an axial cross-sectional schematic view of the electromagnetic trip mechanism of fig. 2;
Detailed Description
It is to be understood that the terms "upper", "middle", "lower", "end", "front", "rear", "left", "right", and the like in the patent specification of the present invention, which indicate positional relationships, are based on the positional relationships shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered as limiting the present invention.
The present invention will be further described with reference to fig. 1 to 5 by way of specific embodiments.
A small-sized residual current circuit breaker with a modular structure is shown in figures 1 and 2 and comprises a shell 15, a handle 1, a residual current test button 14, a connecting rod action mechanism 13, an electromagnetic tripping mechanism 2, a residual current tripper 3, a time delay tripping module 7, a zero sequence current transformer module 4, a residual current control circuit board module 5 and a contact arc extinguishing mechanism, and further comprises a standby current transformer module and an intelligent control circuit board module;
the various modules can be combined differently according to requirements, so that a small residual current circuit breaker, an intelligent small circuit breaker or a small circuit breaker is arranged in the shell 15 with the same structure;
if will small-size electric leakage circuit breaker's zero sequence current transformer module 4 repacking is the current transformer module, electric leakage control circuit board module 5 repacking for intelligent control circuit board module, remove delay tripping module 7 simultaneously, small-size electric leakage circuit breaker set up to intelligent small-size circuit breaker promptly, current transformer, intelligent control circuit board and electric leakage tripping device constitute intelligent tripping device this moment, can realize intelligent small-size circuit breaker high accuracy long time delay, short time delay, instantaneous three-section protection automatically.
Will miniature residual current circuit breaker's zero sequence current transformer module 4, electric leakage control circuit board module 5 remove, miniature residual current circuit breaker set up to miniature circuit breaker promptly, long time delay protection can go on through time delay tripping module 7 this moment, short time delay and instantaneous protection can go on through electromagnetic tripping device 2.
Further setting, as shown in fig. 5, the electromagnetic trip mechanism 2 includes a coil frame 203, an electromagnetic trip coil 202, an electric leakage trip coil 204, a stationary iron core 201, a movable iron core 206, a magnetic yoke 205, a magnetic trip iron core 209, an electromagnetic trip push rod 211 and an electric leakage trip push rod 207, the coil frame 203 is an integral circular coil frame with a large diameter and a small diameter, the electromagnetic trip coil 202 is wound on the large diameter section of the coil frame 203, the electric leakage trip coil 204 is wound on the small diameter section of the other end of the coil frame, the stationary iron core 201 is fixedly arranged at the port inner side of the large diameter section at the left side of the coil frame 203, the movable iron core 206 is sleeved at the port inner side of the small diameter section at the other end of the coil frame 203, the magnetic trip iron core 209 is fixedly arranged at the port position of the small diameter section of the coil frame 203, the magnetic trip iron core is sleeved at the other end inner side of the, an electromagnetic tripping push rod 211 and an electromagnetic tripping spring 210 on the electromagnetic tripping push rod are sleeved at one end, close to the static iron core 201, in the magnetic tripping iron core 209, and an electric leakage tripping push rod 207 and an electric leakage tripping spring 208 on the electric leakage tripping push rod are arranged at one end, close to the movable iron core 206, of the magnetic tripping iron core 209. In particular, the electromagnetic trip coil 202, the static iron core 201, the magnetic trip iron core 209 and the electromagnetic trip push rod 211 of the electromagnetic trip mechanism 2 form an electromagnetic trip device to realize short delay and instantaneous protection of the miniature circuit breaker;
particularly, the electric leakage tripping coil 204, the movable iron core 206, the magnetic yoke 205 and the electric leakage tripping push rod 207 of the electromagnetic tripping mechanism 2 form an electric leakage tripping device 3, the electric leakage tripping device 3 is a tripping device of a small-sized electric leakage circuit breaker on the one hand and is also a tripping device of an intelligent small-sized circuit breaker at the same time, the intelligent small-sized circuit breaker collects a load current signal from the electric leakage tripping coil 204 and processes the load current signal through an intelligent control circuit board, and when the load current exceeds a threshold value of the long delay or the short delay or the instantaneous current protection of the circuit breaker, a control signal is immediately output to trip the circuit breaker, so that the long delay, the short delay and the instantaneous three-section protection of the intelligent small-sized circuit.
Further, as shown in fig. 2, 3, and 4, the contact arc extinguishing mechanism includes an L-pole moving contact 9, an L-pole static contact 11, an L-pole arc extinguishing chamber 6 disposed below the L-pole moving contact 9 and the L-pole static contact 11, an N-pole moving contact 10, an N-pole static contact 12, and an N-pole arc extinguishing chamber 8 disposed below the N-pole moving contact 10 and the N-pole static contact 12; further, arc extinguishing pieces in the L-pole arc extinguishing chamber 6 are arranged in parallel, an arc striking plate 601 connected with the L-pole moving contact is arranged at the lower part of each arc extinguishing piece, the arc striking plate 601 and the L-pole form an equipotential when being electrified, and the arrangement of the equal-positioning arc extinguishing device can improve the breaking arc extinguishing capability of the L-pole of the circuit breaker;
further, an arc extinguishing piece 801 in the N-pole arc extinguishing chamber 8 is vertically arranged, and an arc striking angle 1201 is arranged at the lower part of the N-pole static contact 12, so that the arc extinguishing capability of the N pole is improved;
according to the staggered arrangement of the two arc extinguishing chambers, L, N poles and L, N poles of arc extinguishing devices can be arranged in the small shell space 15 of the circuit breaker, the internal space of the circuit breaker is fully utilized, and meanwhile the on-off capacity of the circuit breaker is improved.
Further, the casings 15 of the small residual current circuit breaker, the intelligent small circuit breaker and the small circuit breaker are all 1P casings with the same structure and the width of 18mm, and the casings become minimum assembly units of various small circuit breakers. The working principle of the miniature circuit breaker series product is as follows:
small-size electric leakage circuit breaker: the small-sized leakage circuit breaker is characterized in that a zero sequence current transformer collects leakage signals, the leakage signals are amplified by a leakage control circuit board and then enter a leakage tripping coil of an electromagnetic tripping mechanism, the coil generates electromagnetic force to enable a movable iron core to move leftwards through a magnetic yoke, a leakage tripping push rod is pushed to move leftwards, and the electromagnetic tripping push rod at the end of the leakage tripping push rod impacts a tripper of the circuit breaker to trip the small-sized leakage circuit breaker.
Intelligent miniature circuit breaker: the intelligent miniature circuit breaker collects a load current signal by a current transformer, processes the signal by an intelligent control circuit board, outputs a control signal to an electric leakage tripping coil when the load current and the overcurrent time of the circuit breaker exceed a long delay or a short delay or an instantaneous protection threshold, the coil generates electromagnetic force to enable a movable iron core to move leftwards through a magnetic yoke, a electric leakage tripping push rod is pushed to move leftwards, and the electromagnetic tripping push rod at the end of the electric leakage tripping push rod impacts a tripper of the circuit breaker to trip the circuit breaker.
Small-sized circuit breaker: when the load current of the miniature circuit breaker passes through the delay release, the overload current of the miniature circuit breaker makes the bimetal deform and bend after a certain time, thereby pushing the release of the circuit breaker to release and completing the long delay protection of the circuit breaker.
It should be noted that: the above examples are given for the purpose of clearly illustrating the invention, and are not to be construed as limiting the invention, as will be apparent to those skilled in the art,
other variants and modifications of the invention, based on the above description, may be made, and it is not necessary or necessary to exhaustively enumerate all embodiments, and obvious variants and modifications can be derived therefrom, while remaining within the scope of the invention.

Claims (4)

1. The utility model provides a modular structure's small-size residual current circuit breaker, includes shell, handle, connecting rod actuating mechanism, electromagnetism tripping device, contact arc extinguishing mechanism and time delay tripping module, zero sequence current transformer module, electric leakage control circuit board module, still includes current transformer module, intelligent control circuit board module for use, characterized by:
the various modules can be combined differently according to the product requirements, so that a small-sized leakage circuit breaker, an intelligent small-sized circuit breaker or a small-sized circuit breaker is arranged in the shell;
the zero sequence current transformer module of the small-sized residual current circuit breaker is replaced by a current transformer module, the residual current control circuit board module is replaced by an intelligent control circuit board module, and meanwhile, a delay tripping module is removed, so that the small-sized residual current circuit breaker is set as an intelligent small-sized circuit breaker;
will small-size electric leakage circuit breaker's zero sequence current transformer module, electric leakage control circuit board module remove, small-size electric leakage circuit breaker set up to small-size circuit breaker promptly.
2. The small residual current circuit breaker according to claim 1, wherein: the electromagnetic tripping mechanism comprises a coil framework, an electromagnetic tripping coil, a leakage tripping coil, a static iron core, a movable iron core, a magnet yoke, a magnetic tripping iron core, an electromagnetic tripping push rod and a leakage tripping push rod, wherein the coil framework is an integral circular coil framework with one section of large diameter and one section of small diameter, the electromagnetic tripping coil is wound on the large diameter section of the coil framework, the leakage tripping coil is wound on the small diameter section of the coil framework, the static iron core is fixedly arranged on the inner side of the port of the large diameter section of the coil framework, the movable iron core is sleeved on the inner side of the port of the small diameter section of the coil framework, the magnet yoke is fixedly arranged on the port of the small diameter section of the coil framework, the magnetic tripping iron core is sleeved on the inner side of the other end of the large diameter section of the coil framework, one end of the magnetic tripping iron core is provided with the electromagnetic tripping push rod and an electromagnetic tripping spring on the electromagnetic tripping push rod, one end of the electromagnetic tripping push rod close to the movable iron core is provided with the electric leakage tripping push rod and an electric leakage tripping spring on the electric leakage tripping push rod.
3. The small residual current circuit breaker according to claim 1, wherein: the contact arc extinguishing mechanism comprises an L-pole moving contact, an L-pole static contact, an L-pole arc extinguishing chamber arranged at the lower part of the L-pole moving contact and the L-pole static contact, an N-pole moving contact, an N-pole static contact and an N-pole arc extinguishing chamber arranged at the lower part of the N-pole moving contact and the N-pole static contact;
the arc extinguishing pieces in the L-pole arc extinguishing chamber are arranged in parallel, and the lower parts of the arc extinguishing pieces are provided with L-pole arc striking plates connected with the L-pole moving contacts;
the arc extinguishing piece in the N-pole arc extinguishing chamber is vertically arranged, and an arc striking angle is arranged at the lower part of the N-pole static contact;
the L-pole arc extinguish chamber is arranged on one side in the shell, and the N-pole arc extinguish chamber is arranged on the other side in the shell.
4. The small residual current circuit breaker, the intelligent small circuit breaker and the small circuit breaker according to claim 1 are all 1P casings with the same structure and the width of 18 mm.
CN201910612715.5A 2019-07-09 2019-07-09 Small-sized leakage circuit breaker with modular structure Pending CN112216564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910612715.5A CN112216564A (en) 2019-07-09 2019-07-09 Small-sized leakage circuit breaker with modular structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910612715.5A CN112216564A (en) 2019-07-09 2019-07-09 Small-sized leakage circuit breaker with modular structure

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CN112216564A true CN112216564A (en) 2021-01-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114530354A (en) * 2022-02-25 2022-05-24 中群电气有限公司 Intelligent temperature control circuit breaker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201788918U (en) * 2010-09-20 2011-04-06 彭友红 18mm-wide double-line electric leakage circuit breaker with high breaking capacity
CN204991628U (en) * 2015-09-14 2016-01-20 北京明日电器设备有限责任公司 Unitized moulded case circuit breaker product of spare part height
CN206148383U (en) * 2016-11-19 2017-05-03 浙江祥兴电气成套有限公司 Electric leakage circuit breaker and combination tripping device thereof
CN206271639U (en) * 2016-12-14 2017-06-20 温州奥来电器有限公司 A kind of electromagnetic system
US20180090292A1 (en) * 2015-03-19 2018-03-29 Hebei Bao Kay Electric Co., Ltd Miniature circuit breaker capable of rapid breaking
CN108321047A (en) * 2018-02-02 2018-07-24 深圳曼顿科技有限公司 Miniature circuit breaker with novel zero sequence mutual inductor installation structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201788918U (en) * 2010-09-20 2011-04-06 彭友红 18mm-wide double-line electric leakage circuit breaker with high breaking capacity
US20180090292A1 (en) * 2015-03-19 2018-03-29 Hebei Bao Kay Electric Co., Ltd Miniature circuit breaker capable of rapid breaking
CN204991628U (en) * 2015-09-14 2016-01-20 北京明日电器设备有限责任公司 Unitized moulded case circuit breaker product of spare part height
CN206148383U (en) * 2016-11-19 2017-05-03 浙江祥兴电气成套有限公司 Electric leakage circuit breaker and combination tripping device thereof
CN206271639U (en) * 2016-12-14 2017-06-20 温州奥来电器有限公司 A kind of electromagnetic system
CN108321047A (en) * 2018-02-02 2018-07-24 深圳曼顿科技有限公司 Miniature circuit breaker with novel zero sequence mutual inductor installation structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114530354A (en) * 2022-02-25 2022-05-24 中群电气有限公司 Intelligent temperature control circuit breaker

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