JPH0933593A - Continuity checker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuity checker which is easy to carry with a smaller size and enables completion of inspection in a short time with a simple operation. SOLUTION: A case body 1 is provided with a plurality of contacts 2 for detecting continuity projecting at a specified interval and also with two continuity notifying sections 3 dicernable. The contacts 2 are made in a Y connection and and the continuity notifying section 3 and a power source 5 with the polarity opposite thereto are connected in series to two wires of the Y connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuity checker for inspecting a short-circuit between breaker poles or a main bar of a switchboard, and a disconnection between a case for a switchboard such as a switchboard made of a conductive material and a conductive material or a breaker mounting base. It is about.

[0002]

2. Description of the Related Art Conventionally, a short-circuit inspection between breaker poles and a main bar mounted on a switchboard is performed by connecting a buzzer for informing a conduction state to a lead wire to which a power source is connected and which has a clip at its tip. Using an inspection device with a contactor at the other end of the wire, clip one breaker terminal or main bar or branch bar of the switchboard with a clip, and then contact the other breaker terminal or main bar or branch bar , And the short circuit was judged by whether or not a buzzer sounded. Therefore, since the clip is sandwiched between each breaker terminal, the main bar, and the wiring of the branch bar, and the contactor is brought into contact with the other pole to perform the short circuit inspection, the work is complicated and the inspection takes time. there were. Further, since the inspection between the case of the switchboard and the case of the switchboard made of a conductive material such as the switchboard or between the breaker mounting bases is performed by a withstand voltage tester using a 100V power source, there is a problem that the device is large and difficult to carry. there were.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above problems and provides a continuity checker which is small in size, easy to carry, easy to operate, and capable of completing an inspection in a short time. is there.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a plurality of contact detectors for detecting continuity are provided on a case body at a predetermined distance, and two distinguishable conduction notification portions are provided on the case body.
Also, each of the contacts is Y-connected, and the Y-connection is connected in series to the two connection wires of the conduction notifying unit and the power supplies whose polarities are opposite to each other.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the continuity checker of the present invention, a contact for ground fault detection provided with an adsorption portion that can be electrically connected to a board case or the like is connected to a Y-shaped connection notifying portion. The contactor for ground fault detection is connected via the branch lead wire to the connection wire to which the Y-connection continuity notifying part is connected and the connection wire which is not connected, and is connected to the branch lead wire. Each change-over switch that can be switched selectively may be connected, and the earth detecting suction portion may be a magnet.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the first embodiment shown in FIGS. Reference numeral 1 denotes a case main body made of an insulating material in which a horizontal base portion 1b is formed at the tip of the grip cylinder portion 1a.
Three contact detectors 2 for detecting continuity are projected downward at a predetermined interval corresponding to the main bar of the book, and two distinguishable continuity notifications are provided on the upper surface of the grip cylinder portion 1a of the case body 1. A display lamp 3a and a display lamp 3b as the unit 3 are provided. Reference numeral 4 denotes a power source storage portion provided in the grip cylinder portion 1a of the case body 1, and a power source 5 such as a battery is exchangeably stored in the power source storage portion 4. Reference numeral 6 is a contactor for detecting a ground fault in which a suction portion 8 is provided at the tip of the lead wire 7. The suction portion 8 is electrically connected to a case for a board made of a magnetic material such as a switchboard or a breaker mounting base, and Magnet 8a that can be attracted
It has been.

As shown in FIG. 2, the terminal portions 2a, 2b, 2c of each contactor 2 which are contact-connected to the three main bars of the single-phase three-wire type switchboard as in the first embodiment are as shown in FIG. , Y-shaped connection, and the terminals 2a, 2c connected in contact with the L ₁ pole voltage line and the L ₂ pole voltage line are connected to the batteries 5a, 5b as the power source 5 and the continuity notification section Display lamps 3a and 3b as 3 are connected. In addition, the lead wire 7 of the contactor 6 for detecting the ground fault is connected to the connection of the terminal portion 2b which is contact-connected to the N-pole neutral wire. 9a,
Reference numerals 9b and 9c denote probes which are implanted in the terminal portions 2a, 2b and 2c of the contactor 2, respectively.
The contacts 2 are reliably connected to the L ₁ pole voltage line, the N pole neutral line, and the L ₂ pole voltage line by b and 9c.

After the completion of the assembly,
In this state, hold the holding cylinder 1a of the case body 1
Wiring between the poles of each breaker mounted on the switchboard,
The terminals 2a, 2 of the contactor 2 are connected to the wiring between the three main bars.
b, 2c to L through probes 9a, 9b, 9c₁Pole
Pressure wire, N pole neutral wire, L_TwoIf you make contact with the
-L between the pole gap and the three main bars₁Polar voltage line and L_TwoPole voltage
As a power source 5 for the terminal portions 2a, 2c which are contact-connected to the wires
As the battery 5a and 5b and the conduction notifying unit 3 in which the polarities of
Since the display lamps 3a and 3b of are connected in series,
L₁If there is continuity between the pole voltage line and the N pole neutral line, L₁Pole
The indicator lamp 3a indicates that there is a short circuit between the pressure wire and the N pole neutral wire.
Lights up, N pole neutral line and L_TwoIf there is continuity between the pole voltage lines,
N pole neutral line and L_TwoDisplayed as a short circuit between pole voltage lines
3b lights up, L₁Polar voltage line and L _TwoConduction between pole voltage lines
If there is, L₁Polar voltage line and L_TwoThere is a short circuit between the pole voltage lines
Then, the display lamps 3a and 3b are turned on at the same time.
Therefore, it is possible to instantly inspect for short circuits between the breaker poles and the main bar.
Can be

In addition, the insulation between the board case made of a magnetic material of the switchboard and the breaker mounting base and the voltage line is such that the magnet 8a of the attraction portion 8 as the contactor 6 for detecting the ground fault is made of a magnetic metal made of a magnetic material. After being attracted to the board case and electrically connected, the probes 9a, 9b, 9c of the terminal portions 2a, 2b, 2c are connected to the L ₁ pole voltage wire, the N pole neutral wire,
Contacting the wiring L _2-pole voltage line, if there is continuity between the board for cases and breaker mounting base and L _1-pole voltage line, display lamp 3a is turned, conduction between the board case for the L _2-pole voltage line If there is, the display lamp 3b is turned on and the ground fault can be checked.

Further, the circuit diagram of the second embodiment shown in FIG. 3 corresponds to a three-phase three-wire type switchboard, and the terminal portion 2 to which the battery 5b as the power source 5 and the display lamp 3b are connected.
The branch lead wire 10 provided with the adsorption portion 8 as the contact 6 is connected to the wire connection of c and the connection of the terminal portion 2b connected between the display lamps 3a and 3b. Changeover switch 11 that can be changed relative to
12 are connected. The continuity check between the three-phase wires is performed in the same manner as in the first embodiment, but when checking the ground fault between the board case or breaker mounting base and the three-phase wires, connect to the S wire. When the changeover switch 11 of the branch lead wire 10 is turned on, the changeover switch 12 of the branch lead wire 10 connected to the T line is relatively turned off. In this state, when the probes 9a, 9b, 9c of the contactor 2 are contact-connected to the three-phase wires of R line, S line, and T line, if there is continuity between the board case and the R line, the display of the continuity notification unit 3 The lamp 3a lights up with a short circuit. Further, if there is continuity between the board case and the T line, the display lamp 3b of the continuity notifying unit 3 is lit because there is a short circuit. Then, when the change-over switch 11 is turned off, the change-over switch 12 is relatively turned on, and in this state, the probes 9a, 9b, 9c are contact-connected to the three-phase line of the R line, the S line, and the T line. If there is continuity between the board case and the S line, the continuity notification unit 3
The indicator lamp 3b is turned on when there is a short circuit, and a ground fault check can be performed between the board case and the three-phase wire of the R line, S line, and T line and the board case or the breaker mounting base.

In the first and second embodiments, the contactor 2 is fixed to the horizontal base 1a of the case body 1, but if the left and right contactors 2 are slidable left and right, the contactor 2 is
It is possible to check the continuity of various wirings and breaker poles having different intervals between the main bars of the book. Also,
In the first and second embodiments, the continuity notification section 3 is displayed by the display lamps 3a and 3a.
Although b is used, it goes without saying that a buzzer with a different sound may be used, and the suction part 8 is the magnet 8a in the embodiment, but the suction cup is coated with a conductive material, and the coating and the lead wire 7 are used. Of course, it may be electrically connected.

[0012]

As is apparent from the above description, the present invention has a plurality of contacts protruding from the case body at a predetermined interval, and the contacts can be simultaneously connected to the three-phase wire. You can instantly check the short circuit between the breaker poles by a simple operation of gripping the case body and bringing the contactor into contact with the wiring of the switchboard, and the conduction result can be identified by two distinguishable conduction notifications. It can be easily confirmed by activating each or both parts. Also, by connecting the lead wire, which has an adsorption part at the tip that can be electrically connected to the board case or breaker mounting base, to the Y-shaped connection of the contact, the board case or breaker mounting base and the three main bar It is easy to carry out a ground fault chuck, is compact and easy to carry, and can check for short circuits and ground faults even in places where there is no power supply. Moreover, by connecting a changeover switch that can be relatively switched to a branch lead wire provided at the tip with an adsorption part that can be electrically connected to the board case or breaker mounting base, the three-phase wire and the board case or breaker mounting base can be connected. It has many advantages such as a ground fault check with. Therefore, the present invention is a great contribution to the development of the industry as a continuity checker that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a circuit diagram of the first embodiment of the present invention.

FIG. 3 is a circuit diagram of a second embodiment of the present invention.

[Explanation of symbols]

 1 Case body 2 Contact 3 Conduction notification part 5 Power supply 6 Contact 8 Adsorption part 8a Magnet 9 Branch lead wire 10 Changeover switch 11 Changeover switch

Claims (4)

[Claims] 1. A plurality of contact detecting elements (2) for detecting continuity are provided on the case body (1) so as to project at a required interval, and the case body is also provided.
(1) is provided with two distinguishable conduction notification parts (3), and each of the contacts (2) is connected in a Y shape, and the two connection wires of the Y-shaped connection are connected to the conduction notification part (3) and the polarity. A continuity checker characterized in that a power supply (5) in which the two are reversed is connected in series. 2. A ground fault detecting contactor (6) having a suction portion (8) capable of suction so as to be electrically connected to a board case made of a magnetic material, and a Y-connection continuity notifying portion. The continuity checker according to claim 1, wherein (3) is connected to a wire which is not connected. 3. A ground fault detection contactor (6) which is not connected to a Y-shaped continuity notification section (3), and a continuity notification section.
It is characterized in that the branch lead wire (10) is connected to one of the wires connected to (3), and the changeover switches (11) and (12) which are relatively switched to the branch lead wire (10) are connected. The continuity checker according to claim 1. 4. The continuity checker according to claim 2, wherein the attraction section (8) is a magnet (8a).