CN211208376U

CN211208376U - Multifunctional circuit breaker

Info

Publication number: CN211208376U
Application number: CN202020089066.3U
Authority: CN
Inventors: 李文杰; 李文俊; 李文伟
Original assignee: Dalian Ino Tech Co Ltd
Current assignee: Dalian Ino Tech Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-08-07
Anticipated expiration: 2030-01-15
Also published as: AU2021100183A4; AU2021200163A1

Abstract

The utility model provides a multifunctional circuit breaker, including casing, actuating mechanism, protection machanism, release and test device, protection machanism is including establishing short-circuit protection device, overload protection device and earth leakage protection device in the casing, protection machanism is still including establishing the fault arc protection device in the casing, fault arc protection device including the inductor that is used for detecting fault arc, with inductor electric connection's main control board and with main control board electric connection's power strip, be equipped with the silicon controlled switch who is used for controlling the release to realize open circuit on the power strip. The utility model discloses small, occupation space is little, creepage distance is big, the security is high, with low costs and have multiple protection device.

Description

Multifunctional circuit breaker

Technical Field

The utility model particularly relates to a multifunctional circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The fault arc protector is an intelligent circuit protector which can detect and identify fault arcs and normal working arcs in a line. The main function is to prevent the fire hazard caused by fault arcs such as poor contact and poor insulation in the electric circuit.

According to chinese utility model patent CN201811442020.9, it discloses a fault arc protection circuit breaker, comprising a housing, a tripping part and an electronic control part, which are arranged in the housing, the tripping part is connected in the line to be protected, for instantaneous action to control the disconnection of the line to be protected when detecting that there is a fault arc in the line to be protected; the electronic control part comprises an arc detection coil and a control board, the control board is connected with the arc detection coil, detects the fault arc through the arc detection coil, and controls the instantaneous action of the tripping part when the fault arc is detected; the shell is a cuboid with a protruding structure at the front end, and the tripping part is arranged in the protruding structure; the electronic control part is arranged at the rear end of the tripping part, wherein the control board is positioned at the upper end in the shell, and the arc detection coil is positioned at the lower end in the shell and is arranged adjacent to the control board up and down; set up live wire input, live wire output and a zero line wiring end on the casing, the live wire input sets up in the lower extreme of casing lateral wall, the live wire output set up in on the lower terminal surface of casing, the live wire certainly the live wire input gets into the casing to pass electric arc detection coil and export from the live wire output again, the zero line wiring end set up in on the up end of casing, the zero line inserts the casing from the zero line wiring end and supplies power for the control panel. The working principle of the circuit breaker is that whether a fault arc exists or not is judged by a main control chip in a main control circuit according to the detection result of an arc detection circuit, when the fault arc is detected, the main control chip sends a tripping signal to a tripping driving circuit at the zero crossing point moment according to the detection result of a zero-crossing detection circuit, and the tripping driving circuit controls a contact on a tripping deflector rod to pull in so as to trigger a conventional circuit breaker to execute the action of a breaking circuit; therefore, the existing conventional circuit breaker needs to be combined with the fault arc protector for use, so that the circuit breaker has the fault arc protection function, the installation volume of the circuit breaker is increased, the occupied installation space is large, the circuit breaker is inconvenient to install by workers, and the use cost is increased.

The existing testing device on the circuit breaker has short creepage distance, is easy to generate creepage phenomenon, causes short circuit of a circuit or damage of a conductive piece, reduces safety, and shortens service life; and the existing testing device has large volume and large occupied space, so that the whole volume of the protector is enlarged, and the cost of the testing device and the whole manufacturing cost of the breaker are improved.

SUMMERY OF THE UTILITY MODEL

Based on the problem, the utility model aims to provide a small, occupation space is little, creepage distance is big, the security is high, with low costs and have multiple protection mechanism's multi-functional circuit breaker.

Aiming at the problems, the following technical scheme is provided: the utility model provides a multifunctional circuit breaker, includes casing, actuating mechanism, protection mechanism, release and test device, protection mechanism is including establishing short-circuit protection device, overload protection device and the earth leakage protection device in the casing, protection mechanism is still including establishing the fault arc protection device in the casing, fault arc protection device including the inductor that is used for detecting the fault arc, with inductor electric connection's main control board and with main control board electric connection's power strip, be equipped with the silicon controlled switch who is used for controlling the release to realize open circuit on the power strip.

In the structure, when the inductor on the main control board detects a fault arc, the main control board sends a signal to the silicon controlled switch, the silicon controlled switch generates a larger current after receiving the signal to be conducted with the release, and the movable contact piece is driven to be separated from the static contact piece by the lock catch in the release control executing mechanism, so that the disconnection of a circuit is realized. The protection mechanism further comprises an overvoltage protection device and an undervoltage protection device, the voltage protection device, the undervoltage protection device, the short-circuit protection device, the overload protection device, the leakage protection device and the fault arc protection device are arranged in the same shell, the multifunctional performance of the circuit breaker is achieved, the size of the circuit breaker with the fault arc protection function is greatly reduced, and the occupied space is reduced.

The utility model discloses further set up to, the inductor is "worker" style of calligraphy, and is equipped with two at least. The casing both ends are equipped with input binding post and output binding post, output binding post lower extreme has met residual current transformer, residual current transformer passes through the electric wire and links to each other with short-circuit protection device, and the route winding that the electric wire middle section was through "8" style of calligraphy is on the inductor.

Adopt above-mentioned structure, can protect the coil in the short-circuit protection device when the circuit short circuit, and can improve the stability of electric wire to improve the stability of being connected between residual current transformer and the short-circuit protection device, improved the utility model discloses a reliability.

The utility model discloses further set up to, be equipped with the mounting groove that is used for installing test device in the casing, the casing top is equipped with the installing port that is linked together with the mounting groove, test device include test button, be located test button bottom move button piece, reset spring and with move the quiet button piece that the button piece set up relatively, it is equipped with first contact site, the second contact site that extends towards quiet button piece respectively to move button piece both sides, test button passes through reset spring and can move about the installing port relatively, and control is moved the button piece and is offset or separate with quiet button piece.

In the above structure, the housing includes an upper cover and a bottom cover fastened to the upper cover. And pressing the test button to drive the movable button sheet to move downwards, so that the first contact part and the second contact part are abutted to the static button sheet. The static button sheet is electrically connected with the test circuit. Can be convenient for test button through setting up reset spring and reset to improved the utility model discloses a convenience. Through setting up first contact site, second contact site for it just can switch on to need two contacts to contact when moving button piece and quiet button piece contact, when moving button piece and quiet button piece separation, can increase distance between the two doubly, has improved the utility model discloses a security and reliability. Set up in the reduction occupation space that can be very big bottom the test button through will moving the button piece for the inner space is compacter, thereby can reduce the volume of casing, has reduced manufacturing cost, has improved the utility model discloses a reliability. Can be convenient for carry on spacingly to test button through setting up the installing port to test mechanism's stability has been improved.

The utility model discloses further set up to, test button includes the button post and the briquetting that links to each other with the button post, button post one end protrusion is located the casing outside in the installing port, and the other end links to each other with the briquetting and is located the mounting groove, the briquetting bottom is equipped with the reference column with reset spring looks adaptation, set up the through-hole that is used for reset spring to pass on the movable button piece.

In the structure, the user can carry out the operation to test button through the button post of protrusion in the casing, thereby has improved the utility model discloses a convenience. Can be convenient for fix a position reset spring through setting up the reference column to can be convenient for reset spring and restore after producing deformation, and can be convenient for it to install, improved test mechanism's stability, improved the utility model discloses a reliability. Can be convenient for move the location installation of button piece through setting up the through-hole to workman's installation effectiveness has been improved the utility model discloses a reliability.

The utility model discloses further set up to, move the other both sides of the relative first contact site of button piece, second contact site and be equipped with the spacing groove, the briquetting bottom is equipped with the lug with spacing groove looks adaptation.

In the structure, through setting up spacing groove and lug looks adaptation, can carry on spacingly to the moving button piece, prevent that it from rotating, and can be convenient for the workman and install to improved the stability that first contact site, second contact site offset with quiet button piece, improved the utility model discloses a reliability and convenience.

The utility model discloses further set up to, the bottom of mounting groove is equipped with the baffle towards the installing port, be equipped with the fixed plate on the baffle, be provided with two at least ribs along its edge at least relatively on the fixed plate, form the fixed slot that is used for fixed reset spring bottom between two ribs.

In the structure, can improve the creepage distance between quiet button piece and the movable button piece when reducing the volume of test button through the rib on the fixed plate, thereby improve the utility model discloses a security has reduced the utility model discloses a well test device's manufacturing cost has reduced the volume of casing. The fixing groove formed by the ribs and the fixing plate can fix the bottom end of the reset spring, so that the stability of the reset spring is improved, and the reliability of the testing device is improved. Through setting up baffle and fixed plate can make test device's structure compacter, improved test device's stress intensity to test device's reliability has been improved.

The utility model discloses further set up to, the draw-in groove has been seted up on the inner wall relative with the baffle in the mounting groove, form the constant head tank that is used for fixed quiet button piece between draw-in groove and the baffle, quiet button piece is equipped with two and is located the baffle both sides respectively.

In the structure, through installing two quiet button pieces respectively in two constant head tanks independent each other, insulating each other, can further increase creepage distance, improve the utility model discloses a security can be convenient for the location installation of quiet button piece simultaneously, has improved the utility model discloses an installation effectiveness.

The utility model discloses further set up to, test device still includes and just is used for carrying out spacing translucent cover with mounting groove looks adaptation to test device, the one side of keeping away from test button on the translucent cover is seted up flutedly, be equipped with the pilot lamp in the recess, the observation hole has been seted up with the corresponding position department of pilot lamp on the casing.

In the structure, can carry on spacingly to the test device through setting up the translucent cover, the test button of being convenient for carries out displacement from top to bottom, and can provide enough strong stress intensity under the less condition of test device volume to improve test device's stability, reduced the utility model discloses a manufacturing cost. The condition of pilot lamp can be observed through setting up the observation hole to can the person of facilitating the use know the utility model discloses whether be in normal condition, thereby improved the utility model discloses a reliability. The PCB board includes power module and with power module electric connection's arc detection module, the pilot lamp is connected with the power module electricity. The indicating lamp is always on to indicate that the utility model has no fault; the indicator light flickers to indicate that a fault occurs, and specific fault reasons can be distinguished through the flickering condition of the indicator light, such as: continuous flashing, continuous flashing at two intervals, and the like.

The utility model discloses further set up as, the translucent cover top is equipped with the stopper that is located the briquetting top towards one side of button post.

In the structure, can carry on spacingly to the briquetting through setting up the stopper, prevent that test button from deviating from, and can be convenient for the workman and install, improved the installation effectiveness, thereby improved the utility model discloses a reliability.

The utility model discloses further set up to, T type groove has been seted up at button capital portion, briquetting one side is equipped with the arch.

In the structure, can play the effect of instructing the installation to the workman when the installation test button through setting up the arch, be convenient for with the forward installation of T type groove, thereby improved the utility model discloses a convenience and installation effectiveness.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the first viewing angle inside the middle housing of the present invention.

Fig. 3 is an enlarged view of a structure at a in fig. 2.

Fig. 4 is a schematic structural view of a second viewing angle inside the middle housing according to the present invention.

Fig. 5 is an enlarged view of the structure at B in fig. 4.

Fig. 6 is a schematic structural diagram of the installation of the middle test device of the present invention.

Fig. 7 is an enlarged view of the structure at C in fig. 6.

Fig. 8 is a schematic view of the split structure of the middle test device and the housing of the present invention.

Fig. 9 is an enlarged view of the structure at D in fig. 8.

Fig. 10 is a schematic sectional structure diagram of the middle test device of the present invention.

The reference numbers in the figures mean: 1-a shell; 2-an actuator; 3-a protection mechanism; 4-a release; 5-a test device; 31-short circuit protection; 32-overload protection means; 33-earth leakage protection device; 34-fault arc protection device; 341-an inductor; 342-a main control board; 343-power panel; 11-input connection terminal; 12-an output connection terminal; 13-residual current transformer; 6-electric wire; 14-mounting grooves; 15-mounting port; 51-test button; 52-moving the button piece; 53-a return spring; 54-static button sheet; 521-a first contact; 522-a second contact; 511-button post; 512-briquetting; 5121-locating posts; 523-through holes; 524-a limit groove; 5122-bumps; 7-a separator; 71-a fixing plate; 72-ribs; 73-fixed slots; 141-card slot; 142-a positioning groove; 8-a transparent cover; 81-groove; 82-an indicator light; 16-a viewing aperture; 83-a limiting block; 5111-T-shaped groove; 5123-bump.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The multifunctional circuit breaker shown in fig. 1 to 10 includes a housing 1, an actuator 2, a protection mechanism 3, a trip 4, and a testing device 5, where the protection mechanism 3 includes a short-circuit protection device 31, an overload protection device 32, and an earth leakage protection device 33 that are disposed in the housing 1, the protection mechanism 3 further includes a fault arc protection device 34 that is disposed in the housing 1, the fault arc protection device 34 includes an inductor 341 for detecting a fault arc, a main control board 342 electrically connected to the inductor 341, and a power board 343 electrically connected to the main control board 342, and a thyristor switch for controlling the trip 4 to open a circuit is disposed on the power board 343.

In the above structure, when the inductor 341 on the main control board 342 detects a faulty arc, the main control board 342 sends a signal to the thyristor switch, the thyristor switch receives the signal and then generates a large current to conduct with the release 4, and the release 4 controls the lock catch in the actuating mechanism 2 to drive the movable contact piece and the static contact piece to separate, thereby realizing the disconnection of the circuit. The protection mechanism 3 further comprises an overvoltage protection device and an undervoltage protection device, the voltage protection device, the undervoltage protection device, the short-circuit protection device 31, the overload protection device 32, the leakage protection device 33 and the fault arc protection device 34 are arranged in the same shell 1, the multifunctional performance of the circuit breaker is achieved, the size of the circuit breaker with the fault arc protection function is greatly reduced, and the occupied space is reduced.

In this embodiment, the inductors 341 are "i" shaped, and at least two inductors are provided. The utility model discloses a short-circuit protection device, including casing 1, input binding post 11 and output binding post 12 are equipped with at casing 1 both ends, output binding post 12 underpart termination has residual current transformer 13, residual current transformer 13 passes through electric wire 6 and links to each other with short-circuit protection device 31, and the route winding that "8" style of calligraphy is passed through in electric wire 6 middle section is on inductor 341.

Adopt above-mentioned structure, can protect the coil in the short-circuit protection device 31 when the circuit short circuit, and can improve the stability of electric wire 6 to improve the stability of being connected between residual current transformer 13 and the short-circuit protection device 31, improved the utility model discloses a reliability.

In this embodiment, a mounting groove 14 for mounting a testing device 5 is arranged in the housing 1, a mounting opening 15 communicated with the mounting groove 14 is arranged at the top of the housing 1, the testing device 5 includes a testing button 51, a movable button piece 52 positioned at the bottom of the testing button 51, a return spring 53 and a static button piece 54 arranged opposite to the movable button piece 52, a first contact portion 521 and a second contact portion 522 extending towards the static button piece 54 are respectively arranged at two sides of the movable button piece 52, and the testing button 51 can move up and down relative to the mounting opening 15 through the return spring 53 to control the movable button piece 52 to abut against or separate from the static button piece 54.

In the above structure, the housing 1 includes an upper cover and a bottom cover fastened to the upper cover. When the test button 51 is pressed, the movable button piece 52 is displaced downward, and the first contact portion 521 and the second contact portion 522 are brought into contact with the stationary button piece 54. The static button piece 54 is electrically connected to the test circuit. Can be convenient for test button 51 through setting up reset spring 53 and reset, thereby improve the utility model discloses a convenience. Through setting up first contact site 521, second contact site 522 for it can switch on to need two contacts to contact when moving button piece 52 and quiet button piece 54 contact, when moving button piece 52 and quiet button piece 54 separation, can increase distance between the two at double, has improved the utility model discloses a security and reliability. Set up in the reduction occupation space that can be very big bottom test button 51 through will moving button piece 52 for the inner space is compacter, thereby can dwindle the volume of casing 1, has reduced manufacturing cost, has improved the utility model discloses a reliability. The test button 51 can be conveniently limited by arranging the mounting port 15, so that the stability of the test mechanism is improved.

In this embodiment, the test button 51 includes a button column 511 and a pressing block 512 connected to the button column 511, one end of the button column 511 protrudes out of the mounting opening 15 and is located outside the housing 1, the other end of the button column 511 is connected to the pressing block 512 and is located in the mounting groove 14, a positioning column 5121 matched with the return spring 53 is arranged at the bottom of the pressing block 512, and a through hole 523 used for the return spring 53 to pass through is formed in the button moving sheet 52.

In the above-mentioned structure, the user can carry out the operation to test button 51 through the button post 511 that protrudes in casing 1 to improved the utility model discloses a convenience. Can be convenient for fix a position reset spring 53 through setting up reference column 5121 to reset spring 53 can be convenient for produce and restore after deformation, and can be convenient for it and install, improved test mechanism's stability, improved the utility model discloses a reliability. Can be convenient for move the location installation of button piece 52 through setting up through-hole 523 to workman's installation effectiveness has been improved the utility model discloses a reliability.

In this embodiment, the other two sides of the button piece 52 opposite to the first contact portion 521 and the second contact portion 522 are provided with a limiting groove 524, and the bottom of the pressing block 512 is provided with a protrusion 5122 matched with the limiting groove 524.

In the structure, through setting up spacing groove 524 and lug 5122 looks adaptation, can carry on spacingly to moving button piece 52, prevent that it from rotating, and can be convenient for the workman to install to improved the stability that first contact site 521, second contact site 522 offset with quiet button piece 54, improved the utility model discloses a reliability and convenience.

In this embodiment, a partition plate 7 is disposed at the bottom of the mounting groove 14 toward the mounting opening 15, a fixing plate 71 is disposed on the partition plate 7, at least two ribs 72 are disposed on the fixing plate 71 along the edge thereof, and a fixing groove 73 for fixing the bottom end of the return spring 53 is formed between the two ribs.

In the above-mentioned structure, can improve the creepage distance between quiet button piece 54 and the movable button piece 52 when reducing the volume of test button 51 through rib 72 on fixed plate 71, thereby improved the utility model discloses a security has reduced the utility model discloses a manufacturing cost of well test device 5 has reduced the volume of casing 1. The bottom end of the return spring 53 can be fixed by the fixing groove 73 formed by the rib 72 and the fixing plate 71, so that the stability of the return spring 53 is improved, and the reliability of the testing device 5 is improved. The structure of the testing device 5 can be more compact by arranging the partition plate 7 and the fixing plate 71, the stress strength of the testing device 5 is improved, and the reliability of the testing device 5 is improved.

In this embodiment, a clamping groove 141 is formed in the inner wall of the mounting groove 14 opposite to the partition plate 7, a positioning groove 142 for fixing the static button piece 54 is formed between the clamping groove 141 and the partition plate 7, and the static button piece 54 is provided with two pieces and is respectively located on two sides of the partition plate 7.

In the structure, through installing two quiet button pieces 54 respectively in two constant head tanks 142 independent each other, insulating each other, can further increase creepage distance, improve the utility model discloses a security can be convenient for quiet button piece 54's location installation simultaneously, has improved the utility model discloses an installation effectiveness.

In this embodiment, the testing device 5 further comprises a transparent cover 8 which is matched with the mounting groove 14 and used for limiting the testing device 5, a groove 81 is formed in one side, far away from the testing button 51, of the transparent cover 8, an indicating lamp 82 is arranged in the groove 81, and an observation hole 16 is formed in the position, corresponding to the indicating lamp 82, of the shell 1.

In the structure, can carry on spacingly to test device 5 through setting up translucent cover 8, the test button 51 of being convenient for carries out displacement from top to bottom, and can provide enough strong atress intensity under the less condition of test device 5 volume to improve test device 5 stability, reduced the utility model discloses a manufacturing cost. The condition of pilot lamp 82 can be observed through setting up observation hole 16 to can the person of facilitating the use know the utility model discloses whether be in normal condition, thereby improved the utility model discloses a reliability. The PCB board comprises a power supply module and an arc detection module electrically connected with the power supply module, and the indicator light 82 is electrically connected with the power supply module. The indicator lamp 82 is always on to indicate that the utility model has no fault; the indicator lamp 82 flashes to indicate that a fault occurs, and the specific fault cause can be distinguished by flashing of the indicator lamp 82, such as: continuous flashing, continuous flashing at two intervals, and the like.

In this embodiment, a limiting block 83 located above the pressing block 512 is disposed on a side of the top of the transparent cover 8 facing the button column 511.

In the structure, can carry on spacingly to briquetting 512 through setting up stopper 83, prevent that test button 51 from deviating from, and can be convenient for the workman to install, improved the installation effectiveness, thereby improved the utility model discloses a reliability.

In this embodiment, a T-shaped groove 5111 is formed at the top of the button column 511, and a protrusion 5123 is formed on one side of the pressing block 512.

In the structure, can play the effect of instructing the installation to the workman when installation test button 51 through setting up arch 5123, be convenient for with T type groove 5111 forward installation, thereby improved the utility model discloses a convenience and installation effectiveness.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations of the above assumption should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a multifunctional circuit breaker, includes casing, actuating mechanism, protection mechanism, release and test device, protection mechanism is including establishing short-circuit protection device, overload protection device and earth leakage protection device in the casing, its characterized in that: the protection mechanism is characterized by further comprising a fault arc protection device arranged in the shell, the fault arc protection device comprises an inductor used for detecting fault arc, a main control board electrically connected with the inductor and a power panel electrically connected with the main control board, and a silicon controlled switch used for controlling the release to achieve circuit breaking is arranged on the power panel.

2. A multifunctional circuit breaker according to claim 1, characterized in that: the inductor is "worker" style of calligraphy, and is equipped with two at least, the casing both ends are equipped with input binding post and output binding post, output binding post lower termination has residual current transformer, residual current transformer passes through the electric wire and links to each other with short-circuit protection device, and the route winding of electric wire middle section through "8" style of calligraphy is on the inductor.

3. A multifunctional circuit breaker according to claim 1, characterized in that: be equipped with the mounting groove that is used for installing test device in the casing, the casing top is equipped with the installing port that is linked together with the mounting groove, test device includes test button, be located test button bottom move button piece, reset spring and with move the quiet button piece that the button piece set up relatively, it is equipped with first contact site, the second contact site that extends towards quiet button piece respectively to move button piece both sides, test button passes through reset spring and can shift from top to bottom the installing port relatively, and control is moved the button piece and is offset or separate with quiet button piece.

4. A multifunctional circuit breaker according to claim 3, characterized in that: the test button comprises a button column and a pressing block connected with the button column, one end of the button column protrudes out of the mounting opening and is located outside the shell, the other end of the button column is connected with the pressing block and is located in the mounting groove, the bottom of the pressing block is provided with a positioning column matched with the reset spring, and a through hole used for the reset spring to pass through is formed in the movable button sheet.

5. The multifunctional circuit breaker according to claim 4, characterized in that: the other two sides of the movable button piece, which are opposite to the first contact part and the second contact part, are provided with limiting grooves, and the bottom of the pressing block is provided with a lug matched with the limiting grooves.

6. A multifunctional circuit breaker according to claim 3, characterized in that: the bottom of mounting groove is equipped with the baffle towards the installing port, be equipped with the fixed plate on the baffle, be provided with two at least ribs along its edge relatively on the fixed plate at least, form the fixed slot that is used for fixed reset spring bottom between two ribs.

7. The multifunctional circuit breaker according to claim 6, characterized in that: the mounting groove is internally provided with a clamping groove on the inner wall opposite to the partition plate, a positioning groove for fixing the static button piece is formed between the clamping groove and the partition plate, and the static button piece is provided with two pieces which are respectively positioned at two sides of the partition plate.

8. A multifunctional circuit breaker according to claim 3, characterized in that: the testing device further comprises a transparent cover which is matched with the mounting groove and used for limiting the testing device, a groove is formed in one side, far away from the testing button, of the transparent cover, an indicating lamp is arranged in the groove, and an observation hole is formed in the position, corresponding to the indicating lamp, of the shell.

9. The multifunctional circuit breaker according to claim 8, characterized in that: and a limiting block positioned above the pressing block is arranged on one side of the top of the transparent cover facing the button column.

10. A multifunctional circuit breaker according to claim 9, characterized in that: t type groove has been seted up at button column top, briquetting one side is equipped with the arch.