KR101837131B1 - Integrated module type electric swiching apparatus and electric supply equipment - Google Patents

Abstract

The present invention relates to an integrated module-type electric switching apparatus capable of quickly, easily, and compactly installing an electric power distribution equipment in a site by components integrated in a module form, such as a current transformer, a zero-phase-sequence current transformer, a magnetic switch, and a fuse, and electric power distribution equipment including the same. According to an embodiment of the present invention, the integrated module-type electric switching apparatus comprises: a housing having an opening formed at a front surface thereof; a current transformer which is integrally installed at an upper end of the housing and through which a service wire passes; a zero-phase-sequence current transformer is integrally installed with an upper end of the housing, allowing a power line to pass therethrough, and preventing a line-to-ground fault of a power line by detecting a zero-phase current; a switch module installed in the housing to be exposed through the opening, and including a primary side terminal block installed at an upper end thereof and connected with the service wire passing through the current transformer and a secondary side terminal block formed at a lower end thereof and connected with the power line passing through the zero-phase-sequence current transformer, and a magnetic switch which is formed in the center thereof and in which a contact point is automatically switched off when an overcurrent flowing through the service wire is cut off; and a fuse formed on the service wire connected with the primary side terminal block of the switch module to block the overcurrent.

Description

[0001] INTEGRATED MODULE TYPE ELECTRIC SWITCHING APPARATUS AND ELECTRIC SUPPLY EQUIPMENT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present disclosure relates to an integrated modular electromagnetic switch installed in a distribution facility such as a low-voltage switchboard, a distribution board or a motor control panel (MCC) and a distribution facility including the same.

Unless otherwise indicated herein, the description set forth in this identification section is not prior art to the claims of this application and is not to be construed as prior art as described in this identification section.

Generally, the electricity supplied from the electric power company is received by the water main including the main switch, parking terminal, etc., and then distributed to the power distribution system by the switchboard installed in each concentration camp (demand place) It is distributed with the current of the proper standard for use. Also, the low-voltage power supplied from the power transformer is distributed to the multiple motors by the motor control panel (MCC).

Here, the switchboard is a distribution facility installed at each concentration camp (domicile) to control the distribution system, to distribute electricity, to open / close, to secure, to weigh, etc., and to install switchgear, breaker and instrument. Such a switchboard is classified into a high-voltage switchboard connected to the primary side of the transformer and a low-voltage switchboard connected to the secondary side of the transformer depending on the power used.

As an example of a conventional switchboard, Korean Patent Registration No. 10-1657044 (published on Sep. 19, 2016) discloses a switch that opens and closes a current when a current equal to or higher than a rated current flows, And a video current transformer that is integrally coupled to an output terminal of the circuit breaker through a bus bar and senses the leakage current when a leakage current is generated in the current output from the circuit breaker, And a front end exposed to the outside of the outer case through a front surface of the outer case and inserted into the outer case and electrically connected to the output terminals of the circuit breaker, respectively, At least two front-side busbars inserted into the outer case, At least two rear-side busbars spaced apart from each other by a non-spaced distance and having a rear end exposed to the outside of the outer case, a plurality of neighboring layers being insulated from each other, Layer connection member in which each of the front booth bar and the rear booth bar is connected in a 1: 1 phase by phase and the surface of which is covered with an insulating material, and a coil wound around the annular core, A lead wire connected to both ends of the annular coil for drawing a current induced in the annular coil and electrically connected to both ends of a lead wire installed outside and pulled out from the outer case, An external connection terminal to which an earth leakage detector (ELD) or a ground fault relay (GFR) is electrically connected) There is a low-voltage distribution panel is disclosed having a breaker comprising current transformer integrated image.

Also, the distribution board is a distribution facility installed at a place separated from the trunk line in the indoor wiring to each branch circuit, and the overcurrent circuit breaker of each branch circuit is integrally installed. The distribution board supplies distributed power to each electric load to be used in the bus of the main power source, and includes a wiring breaker (MCCB) for protecting the over current and a leakage circuit breaker which can protect by the leakage of the line.

Korean Patent Registration No. 10-0779233 (Registered on Nov. 29, 2007) discloses a conventional busbar bar which is connected to a main breaker and is partially cut in a cross section, and which surrounds the circumferential surface of the busbar bar And a wrench bolt fastening hole for fastening the fastening bolt to a desired position of the bus bar bar, and a fastening bolt fastening hole for fastening the fastening bolt to a desired position of the bus bar, A charger bolt formed to penetrate through the through hole of the charger bus bar, a charger bus bar formed with a through hole through which the wrench bolt passes at a portion intersecting with the charger bus bar and electrically connected to the charger bus bar, And a nut fastened to the outer peripheral surface of the wrench bolt to fix the charger bus bar to the connecting metal.

In addition, the MCC is a power distribution system that distributes low-voltage power supplied from a power transformer to a plurality of motors, and monitors and blocks an overcurrent flowing into the motor. In order to realize the above function, the electric motor control panel is equipped with a MCCB and electric power control devices such as a display lamp, an operation switch, a current transformer, and an electronic overcurrent relay (EOCR) And includes a plurality of installed units.

An example of a conventional motor control panel includes an operation switch module and an MCC module in a Korean Utility Model Registration No. 20-0476583 (published on Nov. 11, 2013), and the operation switch module includes an operation panel, An operation switch disposed; And an operation switch module side terminal block coupled to an end of the operation switch module side cable, wherein the MCC module is of a rectangular panel shape, and the front side of the operation switch module side A fixed panel in which a rectangular board-shaped groove having a width smaller than that of the panel is formed to form a circuit board receiving layer; and a MCC module side terminal block attached to the circuit board receiving layer and sandwiching the MCC module side cable on the upper surface. A circuit board on which a circuit board is mounted and a protruding portion to be accommodated in the groove is formed on a bottom surface of the circuit board; And an MCCB and an MC which pressurize the fixed panel, wherein the terminal block of the operation switch module and the terminal block of the MCC module are connected To perform a normal operation, or, modular, characterized in that for releasing the coupling in case of emergency are combined and the motor control board to release the ease of cable is disclosed.

A power distribution system such as a conventional distribution board, a distribution board or a motor control panel (MCC) as described above generally includes a current transformer (CT) for converting a large alternating current into a small alternating current proportional to a large alternating current, A zero-phase-sequence current transformer (ZCT) which is used to prevent an accident of the distribution line of the transformer and to warn the electric leakage, a fuse installed between the current transformer and the current transformer for interrupting the overcurrent, And a magnetic switch that protects the following distribution lines while the contact is automatically turned off when the fuse is turned off.

However, it takes considerable time and effort to install each component in the power distribution system such as an electric distribution panel, a distribution panel or a motor control panel (MCC) in the field, and at the same time, There is a problem that a relatively large installation space is required.

The present invention provides an integrated modular electromagnetic switch and a power distribution apparatus including the same, which enable the field installation of the power distribution facility to be performed quickly and compactly as the constituent accessories such as a current transformer, a video current transformer, a magnetic switch and a fuse are integrated into modules .

Further, it is obvious that the present invention is not limited to the technical problems described above, and another technical problem may be derived from the following description.

According to an embodiment of the present disclosure, there is provided a display device including: a housing having an opening formed in a front surface thereof; a current transformer integrally installed at an upper end of the housing and penetrating a lead line; And a primary side terminal block which is installed in the housing so as to be exposed through the opening and connected to a lead wire penetrating through the current transformer at an upper end thereof, A switch module having a secondary terminal to which a power distribution line is connected and a magnetic switch for automatically turning off the contact when an overcurrent flowing through the lead line is cut off at the center; And a fuse interposed between them to block the overcurrent.

According to a preferred aspect of the present disclosure, an auxiliary relay terminal is provided on both sides of the switch module, and an electronic overload relay module connected to the auxiliary terminal block is provided on one side of the housing, and the electronic overload relay The module has a power connector for separate power supply.

According to the embodiments of the present disclosure, since components such as a current transformer, a video current transformer, a fuse, and a magnetic switch can be integrated in a single housing in a module form, they can be installed in a power distribution facility, There is an advantage that can be achieved.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of an integrated modular electromagnetic switch according to one embodiment of the present disclosure;
2 is a bottom perspective view of an integrated modular electromagnetic switch according to one embodiment of the present disclosure;
3 is a wiring structure diagram of an integrated modular electromagnetic switch according to an embodiment of the present disclosure;
4 is a schematic structural view of a distribution facility including an integrated modular electromagnetic switch according to one embodiment of the present disclosure;

Hereinafter, the configuration, operation, and effects of the integrated modular electromagnetic switch according to the preferred embodiment will be described with reference to the accompanying drawings. For reference, in the following drawings, each component is omitted or schematically shown for convenience and clarity, and the size of each component does not reflect actual size. Like reference numerals refer to like elements throughout the specification, and the same reference numerals will be omitted in the drawings.

Figure 1 shows a perspective view of an integrated modular electromagnetic switch according to one embodiment of the present disclosure, Figure 2 shows a bottom perspective view of an integrated modular electromagnetic switch according to one embodiment of the present disclosure, 1 is a wiring diagram of an integrated modular electromagnetic switch according to an embodiment of the present disclosure.

1 to 3, the integrated modular electromagnetic switch 1 according to an embodiment of the present disclosure includes a housing 10 having an opening 11 formed in a front surface thereof, A current transformer 20 integrally provided at the lower end of the housing 10 and penetrating the power distribution line 5 and preventing a detailed accident of the power distribution line 5 through image current detection And a primary side terminal block 41 which is installed in the housing 10 so as to be exposed through the opening 11 and to which a lead wire 3 passing through the current transformer 20 is connected. A switch module 40 having a secondary terminal 43 to which a power distribution line 5 is connected and a magnetic switch 45 for automatically turning off the contact when an overcurrent flowing through the lead line 3 is cut off is provided at the center thereof, , On the lead wire (3) connected to the primary terminal block (41) of the switch module (40) A and a fuse (50) to block.

Here, the housing 10 is a component forming the outer casing of an integrated modular electromagnetic switch according to one embodiment of the present disclosure.

An opening 11 for exposing the switch module 40 is formed on the front surface of the housing 10 and a mounting bracket 10 for fixing the inside of the power distribution apparatus 100 (see FIG. 4) (13) is protruded.

A power connector 15 for supplying power to the electronic overload relay module 60, which will be described later, is provided at an upper portion of the front side of the housing 10.

At the upper end of the housing 10, a current transformer 20 is integrally provided. The current transformer 20 is a component for converting a large alternating current into a small alternating current proportional to the relay. A through hole 21 is formed in the current transformer 20 so that the lead wire 3 corresponding to the primary current passes through the current transformer 20 and a ring type core 23 is wound on the inside of the current transformer 20 for winding secondary coils Respectively.

The current transformer 20 is preferably formed of a three-phase three-wire type and has three through-holes 21 and three ring-shaped coils 23 so that each phase of the lead- Phase current transformer.

At the lower end of the above-described housing 10, a video current transformer 30 is integrally provided. The video current transformer 30 is a component used to prevent a ground fault of a power line of a non-grounded system through video current detection and to alarm a short circuit. A through hole 31 is formed through the distribution transformer 30 so that the distribution line 3 is penetrated and a ring type core 33 for winding a secondary coil do.

All of the distribution lines 5 must pass through the through holes 31 of the video current transformer 30 so that the through holes 31 of the video current transformer 30 and the ring type core 33 Only one is formed.

In the housing 10 described above, the switch module 40 is installed to be exposed through the opening 11. The switch module 40 is provided between the lead line 3 and the power distribution line 5 and blocks the over current flowing in the lead line 3 to protect the line below the power distribution line 5. [

The switch module 40 is provided at its upper end with a primary terminal block 41 to which a lead wire 3 passing through the current transformer 20 is connected and at the lower end of the switch module 40 is connected a power distribution line 5 And a magnetic switch 45 is provided at the center of the switch module 40 so that the contact is automatically turned off when an overcurrent flowing through at least one of the lead wires 3 is cut off .

The primary terminal block 41 includes a number of terminals corresponding to the lead line 3 and the secondary terminal block 43 includes a number of terminals corresponding to the power distribution line 5. [ The magnetic switch 45 may be formed as a magnetic contactor having a known structure in which a contact is opened and closed by an electromagnetic coil like an electromagnetic relay. As the magnetic switch 45, for example, a power saving type electromagnetic contactor ESMC-40N available from Pace Tek Co., Ltd. is applicable.

On both sides of the switch module 40, an auxiliary terminal block 47 for electrical connection with the electronic overload relay module 60 to be described later is provided.

The housing 10 described above is provided with a fuse 50 interchangeably. The fuse 50 is disposed on at least one of the lead wires 3 connected to the primary terminal block 41 of the switch module 40. When the overcurrent flows through the lead wire 3, And to cause the magnetic switch 45 of the motor 40 to be operated to be switched OFF.

It is preferable that the fuse 50 is installed in the housing so as to be replaceable outside the housing 10 without disassembling the housing 10 in particular. To this end, a fuse mounting hole (not shown) for replacing the fuse 50 is separately formed in the housing 10, and the fuse 50 is mounted while rotating and inserted into the fuse mounting hole, And pulled out from the fuse mounting hole. The replacement mounting structure of the fuse 50 is already known in the field of electric equipment, and a detailed description thereof will be omitted here.

An electronic overload relay module 60, also referred to as EOCR (Electronic Overload Relays), is provided on the front side of the above-described housing. The electronic overload relay module 60 is a structural member that serves to protect a motor installed in the power distribution facility.

The input terminal of the electronic overload relay module 60 is connected to the switch module 40 through the auxiliary terminal block 47. The output terminal of the electronic overload relay module 60 is connected to the wiring on the motor side in the distribution facility, At least one terminal or more of the module 60 is connected to the power connector 15 side to receive the operating power separately.

The configuration, operation, and wiring of the electronic overload relay module 60 are already known in the field of electric equipment, and a detailed description thereof will be omitted here.

4 is a schematic structural view of a distribution facility including an integrated modular electromagnetic switch according to an embodiment of the present disclosure.

The integrated modular electromagnetic switch 1 according to the embodiment of the present disclosure described above is provided with a current transformer 20 such as a current transformer 30, a magnetic switch 40 and a fuse 50, And can be installed in the form of an integrated module within the distribution facility 100 requiring the same component accessory.

The distribution facility 100, in which the integrated modular electromagnetic switch 1 according to the embodiment of the present disclosure can be installed in a module form, is installed in each concentration station (domicile) and controls the distribution system, A distribution board disposed at a position separated from the trunk line to each branch circuit in the indoor wiring to distribute the current to each branch circuit and cut off the overcurrent, and a low-voltage power supply unit And a motor control panel (MCC) that monitors and blocks the overcurrent flowing into the motor.

In particular, when the power distribution system 100 is an MCC, the integrated modular electromagnetic switch 1 according to one embodiment of the present disclosure preferably includes an electronic overload relay module 60.

Accordingly, the integrated modular electromagnetic switch 1 according to one embodiment of the present disclosure is configured such that component accessories such as a current transformer 20, a video current transformer 30, a magnetic switch 40, and a fuse 50, 10), it can be installed in the distribution facility 1 such as a low-voltage switchboard, a distribution board or a motor control panel (MCC), so that the installation of the distribution facility 1 can be performed quickly and compactly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. It is to be understood that various equivalents and modifications may be substituted for those at the time of the present application. It is to be understood, therefore, that the above description is intended to be illustrative, and not restrictive, and that the scope of the present invention will be defined by the appended claims rather than by the foregoing description, All changes or modifications that come within the scope of the equivalent concept are to be construed as being included within the scope of the present invention.

1: Integrated modular electromagnetic switch
10: Housing
11: opening
13: Mounting bracket
15: Power connector
20: Current transformer
21: Through hole
23: Ring type core
30: Video current transformer
31: Through hole
33: ring type core
40: Switch module
41: primary terminal block
43: secondary terminal block
45: Magnetic switch
47: auxiliary terminal block
50: Fuse
60: Electronic overload relay module
100: Distribution equipment

Claims (7)

A housing having an opening formed in a front surface thereof;
A current transformer integrally installed at an upper end of the housing and penetrating the penetration line;
A video current transformer installed integrally with the lower end of the housing and penetrating a power distribution line to prevent accidental disconnection of the power distribution line through video current detection;
And a secondary terminal block connected to a power distribution line passing through the video current transformer is provided at a lower end of the primary terminal block. In the center, A switch module having a magnetic switch for automatically turning off a contact when an overcurrent flowing through the switch module is cut off; And
And a fuse interposed on a lead line connected to a primary terminal of the switch module to block an overcurrent,
An auxiliary overload relay module is provided on one side of the front side of the housing and a power supply connector for supplying power to the electronic overload relay module is provided on a front side of the housing, Wherein the first and second electromagnetic switches are electrically connected to each other. The method according to claim 1,
Wherein a mounting bracket for fixing installation in a power distribution unit is protruded from a bottom surface and a bottom surface of the housing. The method according to claim 1,
Wherein the lead line is formed in three phases and the current transformer is formed by a three-phase current transformer in which each phase of the lead line is divided and penetrated. The method according to claim 1,
Wherein the fuse is installed to be exchangeable from the outside. A distribution facility comprising an integrated modular electromagnetic switch according to any one of claims 1 to 4. The method of claim 5,
Wherein the power distribution facility is one of a low voltage distribution board, a distribution board, and a motor control board (MCC). delete

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