JP5111569B2 - Test support equipment and test method for low-pressure air circuit breaker - Google Patents

Description

  The present invention relates to a test support device and a test method for a low-pressure air circuit breaker.

  As a low-pressure air circuit breaker used in facilities such as buildings and factories, for example, a drawer-type one disclosed in Patent Document 1 is known.

  As shown in FIG. 5, when the circuit breaker body 1 is in the connection position (operating position), the drawer-type circuit breaker is connected to the main circuit terminal 5 with the main circuit terminal 5, so that the motor ( It is electrically connected to an auxiliary machine (not shown) to be protected such as an electric motor. In this case, for example, when the position detection switch 4 is pressed on the protrusion 12 provided in the lower part of the circuit breaker body 1, it is detected that the circuit breaker body 1 is in the connection position.

  When performing a test such as a sequence of a control circuit for controlling the circuit breaker, the circuit breaker body 1 is pulled out from the connection position to the test position as shown in FIG. In this case, the main circuit connecting portion 11 and the main circuit terminal 5 are not connected, and the position detection switch 3 is pressed to the protrusion 12 to detect that the breaker body 1 is in the test position.

  When the circuit breaker is inspected or the like, as shown in FIG. 7, the circuit breaker body 1 is further pulled out from the test position to the disconnection position. Furthermore, the whole circuit breaker body 1 can be pulled out from the housing 9 through the opening provided with the door 91.

  In this way, the pull-out type circuit breaker can be operated in the auxiliary machine, or the circuit breaker can be tested and inspected by sequentially setting the test position and the disconnection position in accordance with the drawing amount from the connection position. .

JP-A-8-154315

  By the way, when performing a trial operation of an auxiliary machine during periodic inspection work of a facility, if the sequence start condition is not satisfied for some reason, the circuit breaker cannot be opened and closed, and the entire trial operation process is delayed. There is a case. Therefore, it is desirable to perform an operation test of the circuit breaker without electrically connecting the circuit breaker and the auxiliary machine prior to the trial operation of the auxiliary machine.

  However, depending on the configuration of the circuit breaker control circuit and the auxiliary machine, there is a circuit breaker that can be opened and closed only by a test push button switch when the circuit breaker is in the test position. Therefore, in this combination, the operation test of the breaker alone can be performed in advance, but the establishment of the sequence start condition cannot be confirmed.

  The main present invention that solves the above-mentioned problems is a pull-out type low pressure that is sequentially placed in a test position and a disconnection position in accordance with a pull-out amount from a connection position that is housed in a housing and electrically connected to an auxiliary machine to be protected. A test support device used for an operation test of an air circuit breaker, wherein a fixed portion fixed in the housing and a first position detection switch arranged in the housing are one of the low pressure air circuit breakers. When the low-pressure air circuit breaker detects that the low-pressure air circuit breaker is in the test position by being pressed by a part, the low-pressure air circuit breaker is disposed in the housing and is pressed by a part of the low-pressure air circuit breaker. A test support instrument comprising: a pressing unit that presses a second position detection switch that detects that the air circuit breaker is in the connection position.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the present invention, the circuit breaker including the sequence of the control circuit can be tested prior to the trial operation of the auxiliary machine regardless of the combination of the circuit breaker control circuit and the auxiliary machine.

It is a permeation | transmission side view which shows the positional relationship when performing the operation | movement test of a circuit breaker using the test assistance instrument in one Embodiment of this invention. It is a permeation | transmission top view which shows the positional relationship when performing the operation | movement test of a circuit breaker using the test assistance instrument in one Embodiment of this invention. It is a rear view which shows the positional relationship in the case of performing the operation test of a circuit breaker using the test assistance instrument in one Embodiment of this invention. It is a perspective view which shows the shape of the test assistance instrument in one Embodiment of this invention. It is a permeation | transmission side view which shows the positional relationship when a circuit breaker exists in a connection position. It is a permeation | transmission side view which shows the positional relationship when a circuit breaker exists in a test position. It is a permeation | transmission side view which shows the positional relationship when a circuit breaker exists in a disconnection position.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== Outline of circuit breaker configuration and action ===
Hereinafter, with reference to FIG. 1 thru | or FIG. 3, the outline | summary of a structure and effect | action of a circuit breaker in which an operation test is performed using the test assistance instrument in one Embodiment of this invention is demonstrated.
1 is a side view through the housing 9, FIG. 2 is a plan view through the housing 9 and the circuit breaker body 1, and FIG. 3 is a back view of the inside of the housing 9 (FIG. 1). And FIG. 3 is a rear view seen through the opening on the left side in FIG. 2. A detailed description of the test support instrument 2 shown in FIGS. 1 to 3 will be given later.

  The circuit breaker shown in FIG. 1 is a drawer-type low-pressure air circuit breaker used in a facility such as a building or a factory, for example. 4 and the main circuit terminal 5 are accommodated.

  On the back surface of the housing 9, an opening through which the entire breaker body 1 can be drawn is provided, and a door 91 that can be opened and closed is attached to the opening. FIG. 3 shows a state where the door 91 is opened. The main circuit terminal 5 is disposed on the inner wall of the housing 9, and the position detection switches 3 and 4 are disposed on the bottom surface of the housing 9.

  The circuit breaker body 1 includes a main circuit connection portion 11, a projection portion 12, and a wheel 13. The main circuit connection portion 11 is provided so as to oppose the main circuit terminal 5, and the protrusion 12 and the wheel 13 are provided at the lower part of the circuit breaker body 1. The wheel 13 is guided by a rail (not shown) or the like, and the breaker body 1 can move in a linear direction (left and right directions in FIGS. 1 and 2) in the housing 9.

  The position detection switch 3 (first position detection switch) is arranged so as to be pressed by the protrusion 12 when the circuit breaker body 1 is in the test position. Therefore, the position detection switch 3 can detect that the circuit breaker body 1 is in the test position by being pressed by the protrusion 12. 1 to 3 show a state in which the breaker body 1 is in the test position. In this state, the main circuit connection portion 11 and the main circuit terminal 5 are not connected, and only an operation test of the breaker alone can be performed by a test push button switch (not shown).

  The position detection switch 4 (second position detection switch) is arranged so as to be pressed by the protrusion 12 when the circuit breaker body 1 is in the connection position. Therefore, the position detection switch 4 can detect that the circuit breaker body 1 is in the connection position when pressed by the protrusion 12. In this state, the main circuit connection portion 11 is connected to the main circuit terminal 5, whereby the circuit breaker body 1 is electrically connected to an auxiliary device (not shown) such as a motor to be protected. The machine can be operated.

  As the position detection switches 3 and 4, for example, microswitches are used. When the circuit breaker body 1 is further pulled out from the test position and the position detection switches 3 and 4 are in the disconnect position where neither of them is pressed, the power source is locked by the interlock mechanism, and the circuit breaker side or auxiliary machine side is Inspection can be performed safely.

=== Outline of configuration and operation of test support apparatus ===
Hereinafter, with reference to FIG. 1 thru | or FIG. 4, the structure and effect | action of the test assistance instrument in one Embodiment of this invention are demonstrated.
FIGS. 1 to 3 show the positional relationship when the operation test of the circuit breaker is performed using the test support device 2, and the test support device 2 is used in a state where the circuit breaker body 1 is in the test position. It is done. FIG. 4 is a perspective view showing the shape of the test support instrument 2.

  The test support instrument 2 is formed in a shape as shown in FIG. 4 by bending one metal wire. The metal wire has such a rigidity that the position detection switch 4 can be pressed at least and can be bent. As such a metal wire, for example, an annealed copper wire having a certain diameter (diameter of about 5 mm to 10 mm) can be used. In addition, the metal wire is covered with an insulating member having an insulating property against a low voltage of at least several hundred volts in order to prevent an electric shock accident or the like. As such an insulating member, for example, an insulating vinyl tape can be used.

  One end (A part in FIG. 4) of the test support instrument 2 is a fixed part fixed in the housing 9. In the present embodiment, the test support instrument 2 is fixed by slightly bending the front end of the fixing portion and hooking it on the end of the opening of the housing 9. On the other hand, the other end (B portion in FIG. 4) is a pressing portion for pressing the position detection switch 4. In the present embodiment, the position detection switch 4 is pressed by bending the tip of the pressing portion approximately 90 ° in the direction of the bottom surface of the housing 9. Moreover, the intermediate part which connects a fixing | fixed part and a pressing part is formed in the shape which does not interfere with the projection part 12 and the wheel 13 of the circuit breaker main body 1. FIG.

  In this way, by using the test support instrument 2, the circuit breaker main body 1 is at the test position, and the operation test of the circuit breaker can be performed in a state where the position detection switch 4 is pressed. Therefore, the position detection switch 4 controls the circuit breaker body 1 in a state where the circuit breaker body 1 is not electrically connected to the auxiliary machine, in order to detect that the circuit breaker body 1 is in the connected position. Circuit breaker tests including circuit sequences can be performed.

  As described above, in the test support device 2 shown in FIGS. 1 to 4, the fixing portion (A portion) is fixed in the casing 9 of the drawer-type low-pressure air circuit breaker, and the position detection switch 3 is pressed. When the pressing portion (B portion) presses the position detection switch 4 in the state where the circuit breaker body 1 is in the state where the circuit breaker body 1 is not electrically connected to the auxiliary machine, the position detection switch 4 is In order to detect the connection position, the circuit breaker test including the sequence of the control circuit can be performed prior to the trial operation of the auxiliary machine regardless of the combination of the circuit breaker control circuit and the auxiliary machine.

  Further, by providing the projecting portion 12 at the lower part of the circuit breaker body 1, the position detection switches 3 and 4 arranged on the bottom surface in the housing 9 are pushed down by the projecting portion 12, and the circuit breaker body 1 is moved to the test position. And it can be detected that it is in the connection position.

  Moreover, the test support instrument 2 can be produced at low cost by bending and forming one metal wire.

  In addition, by using an annealed copper wire as the metal wire, the test support instrument 2 can at least depress the position detection switch 4 and can be provided with sufficient rigidity to be bent.

  Further, by covering the metal wire with an insulating member, an electric shock accident or the like in an operation test of the circuit breaker using the test support instrument 2 can be prevented.

  Further, by using an insulating vinyl tape as the insulating member, the test support instrument 2 can be provided with insulation against a low pressure of at least several hundred volts.

  Further, by using the test support device 2, the circuit breaker main body 1 is at the test position and the circuit breaker operation test can be performed in a state where the position detection switch 4 is pressed down. Regardless of the combination, the circuit breaker including the sequence of the control circuit can be tested prior to the trial operation of the auxiliary machine.

  In addition, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Circuit breaker body 2 Test support instrument 3, 4 Position detection switch 5 Main circuit terminal 9 Case 11 Main circuit connection part 12 Protrusion part 13 Wheel 91 Door

Claims (7)

Test used for operation test of a pull-out type low-pressure air circuit breaker that is housed in the housing and that sequentially becomes the test position and disconnection position according to the pull-out amount from the connection position that is electrically connected to the auxiliary machine to be protected A support device,
A fixing portion fixed in the housing;
When it is detected that the low-pressure air circuit breaker is in the test position by pressing a first position detection switch disposed in the housing to a part of the low-pressure air circuit breaker, the housing A pressing unit that is disposed in the body and presses a second position detection switch that detects that the low-pressure air circuit breaker is in the connection position by being pressed by a part of the low-pressure air circuit breaker;
A test support apparatus comprising:   The first and second position detection switches are disposed on a bottom surface in the housing, and are pressed by a protrusion provided at a lower portion of the low-pressure air circuit breaker so that the low-pressure air circuit breaker is The test support instrument according to claim 1, wherein the test support instrument detects that the test position and the connection position are present.   The test support instrument according to claim 1, wherein the fixing portion and the pressing portion are formed by bending a single metal wire.   The test support instrument according to claim 3, wherein the metal wire is an annealed copper wire.   The test support instrument according to claim 3, wherein the metal wire is covered with an insulating member.   The test support instrument according to claim 5, wherein the insulating member is a vinyl tape.   7. The test support device according to claim 1, wherein the low-pressure air circuit breaker is in the test position and the second position detection switch is pressed down. A test method for a low-pressure air circuit breaker characterized by performing an operation test of the circuit breaker.

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