JPH0560812A - Insulation testing device for railway rolling stock - Google Patents

Abstract

PURPOSE:To obtain an insulation testing device for railway rolling stocks which can reduce the labor of testing work and can perform efficient insulation tests. CONSTITUTION:The lead and earth terminals L and E of an insulation tester 111 are connected to the terminals T1-T9 of cables L11-L19 in a railway rolling stock 10 through switches S1-S9 and SS. When the switch S1 is set to the 2 side while the switch SS is set to the 2 side as shown in the figure, the line L11 and the remaining cables L12-L19 are respectively connected to the terminals E and L and inter-line insulation tests can be performed between both terminals. Similarly, when the switches S2-S9 are successively set to the 2 side one by one, tests can be performed for all combinations. When the switch SS is set to the 1 side, in addition, inter-car body insulation tests can be performed on the cables L11-L19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway vehicle insulation test apparatus, and more particularly to an apparatus for performing an insulation test on a plurality of railcar through wires.

[0002]

2. Description of the Related Art In general, each railroad vehicle is provided with a plurality of lead wires in front and rear thereof, and when the vehicles are connected, the lead wires are also connected. In this way, a plurality of pull-through wires are arranged in parallel from the leading vehicle to the rear vehicle. Various electric power signals and control electric signals are transmitted through such lead wires.

When inspecting a vehicle, it is very important to confirm the insulation state of these pull-through wires. Damage to the coating of the pull-through wire, damage to the connection terminals, etc. may result in poor insulation and leakage current. The insulation test is for confirming such leakage current.
In particular, in recent years, electromagnetic automatic air brakes have been adopted to improve braking performance during high-speed driving.If the insulation of the pull-through wire is not ensured, the brakes will be damaged and serious accidents may occur. It can happen.

Generally, such an insulation test for a railroad vehicle is performed in two ways. The first test is
It is called an inter-body insulation test, and is a test for confirming the insulation state between each pull-through wire and the vehicle body. The second test is called a line insulation test, and is a test for confirming the insulation state between the respective pull-through wires.

In order to perform such an insulation test, conventionally, an insulation resistance tester called a megger has been used. This tester is provided with two test wires, a lead wire and a ground wire, and the resistance between the two test wires can be measured.

[0006]

However, the test using the conventional insulation resistance tester has a problem that it is very troublesome. That is, when performing an insulation test between vehicle bodies, it is necessary to connect the ground wire of the insulation resistance tester to the vehicle body and sequentially contact the line wires with one end of each pull-through wire. When performing a line insulation test, connect the ground wire to one of the pair of pull-through wires, connect the lead wire to the other, and check the insulation between both pull-through wires. It is necessary to repeat for the combination of lines. For example, in a vehicle having nine lead wires, nine types of insulation confirmation work are required for the vehicle body insulation test, and 36 types of insulation confirmation work are required for the line insulation test, for a total of 45 types of insulation confirmation work. Become. If this is done for a train of four cars, it will be necessary to measure once for each car and once with all cars connected, a total of five times, and in fact 225 insulation confirmation works are required. And

[0007] Therefore, an object of the present invention is to provide an insulation test device for a railway vehicle which can reduce the labor of test work and can perform an efficient insulation test.

[0008]

[Means for Solving the Problems]

(1) The first invention of the present application is, in an apparatus for performing an insulation test on a plurality of lead wires of a railway vehicle, a connecting plug having a plurality of electrodes electrically contacting respective end points of each lead wire, A plurality of change-over switches for connecting each of the plurality of electrodes to either one of the first node L or the second node E and between the first node L and the second node E are electrically connected. And a tester for testing whether or not they are electrically short-circuited.

(2) The second invention of the present application is the railway vehicle insulation test apparatus according to the first invention, further comprising means for electrically contacting the second node E with the vehicle body of the vehicle. Is.

[0010]

[Work]

(1) In the railway vehicle insulation test apparatus according to the first aspect of the present invention, first, work is performed to connect the connecting plug to the end points of the pull-through wires. Then, all the changeover switches are set in the state of being changed over to the first node L side. Then, the operation for switching to the second node E side is performed for each switch. By this operation, a line insulation test can be performed between the pull-through wire to be connected to the second node E side and all other pull-through wires. In this way, the wire-to-wire insulation test can be carried out for all combinations of all the pull-through wires simply by performing the work of switching each switch one by one.

(2) The insulation testing device for a railway vehicle according to the second aspect of the present invention is provided with means for electrically contacting the second node E with the vehicle body of the vehicle. By electrically contacting the second node E with the vehicle body in a state in which all the changeover switches are switched to the first node L side, it is possible to perform the inter-body insulation test for all the lead wires. ..

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments. First, a conventional insulation test method will be described for reference. FIG. 1 is a diagram showing a conventional method of vehicle-body insulation test. This figure shows four vehicles 10, 20, 3
The test in the state where 0 and 40 were connected is shown. As shown in the figure, the first vehicle 10 is provided with nine lead lines L11 to L19 in the front-rear direction. Similarly, each of the second, third, and fourth vehicles 20, 30, and 40 is also provided with nine lead wires, and when each vehicle is connected, the corresponding lead wire is also electrically connected. Connected to each other. For example, the connecting line C1 includes the first vehicle 10 and the second vehicle 2
Between 0 and 0, the terminal Ta and the terminal Tb are connected. Similarly, the connection line C2 connects between the terminals Tc and Td, and the connection line C3 connects between the terminals Te and Tf. Thus, from the terminal T1 provided on the front end side of the first vehicle 10 to the terminal Tg provided on the rear end side of the fourth vehicle 40, the lead-through lines L11, L2.
1, L31, L41 will electrically pass as one conducting wire. On the front end side of the first vehicle 10, the ends of the nine pull-out lines L11 to L19 are housed in a wiring socket. Here, these nine pulling lines L11 to L
The ends of 19 will be referred to as terminals T1 to T9, respectively. The vehicle bodies of the respective vehicles are connected to each other by connecting lines E1, E2, E
They are electrically connected by means of 3 and each car body is kept at a common ground potential.

Each pull-through wire is used to control the brake system. For example, the pull-through line L11 is a signal line for instructing brake loosening, the pull-through line L12 is a signal line for operating a regular brake, the pull-through line L13 is a negative common line, and the pull-through line L14 is an emergency brake. Used as a signal line. In this case, the electromagnetic supply / discharge valve that operates the service brake is connected between the pull-through lines L12 and L13. Before performing the insulation test, the electrical load elements such as the electromagnetic supply / discharge valve connected to these pull-through wires are removed.

The body-to-body insulation test for such a vehicle has been conventionally performed by the following method. First, the ground wire 2 connected to the ground terminal E of the insulation tester 1 is connected to an appropriate position of the vehicle body (indicated by terminal T0 in the figure). Then, the inspector sequentially brings the lead wire 3 connected to the lead terminal L of the insulation tester 1 into contact with each of the terminals T1 to T9, and confirms the touch of the meter 4 each time. If the insulation between the pull-through wire and the vehicle body is incomplete, a leak current flows through the route of lead wire → pass wire → vehicle body → ground wire, which can be detected by the meter 4. In this way, by performing the test work nine times, the vehicle-body insulation test with the vehicles connected is completed.

On the other hand, a conventional method of line insulation test is shown in FIG. First, any one of the nine terminals T1 to T9 is selected, and the lead wire 3 is connected thereto. In the figure, an example of connection to the terminal T1 is shown. In this state, the inspector successively contacts the ground wire 2 with each of the remaining terminals T2 to T9, and confirms the touch of the meter 4 each time. If the insulation between the pull-through lines is incomplete, the leakage current can be detected by the meter 4. In this way, when the test work is completed eight times, the lead wire is subsequently reconnected to the next terminal T2. In this state, the inspector successively contacts the ground wire 2 with each of the remaining terminals T3 to T9, and confirms the touch of the meter 4 each time. When the test work is completed seven times in this way, the lead wire is subsequently reconnected to the next terminal T3. In this way, the nine lead wires L11 to
Conduct insulation test between lines for all combinations of L19.

The insulation test as described above requires a great deal of labor. With the insulation test apparatus according to the present invention, a very efficient insulation test can be performed without performing such work. Hereinafter, this insulation test apparatus will be described based on illustrated examples.

FIG. 3 is an external view of an insulation test apparatus 100 according to an embodiment of the present invention. This insulation test apparatus 100
Is a device body 110, a meter 120, a ground wire 130,
It is composed of a lead wire 140 and a connecting plug 150. The ground wire 130 is connected to the body of the vehicle and is connected to the lead wire 14
0 is a wiring socket 200 (see FIG. 1) attached to the vehicle.
And housing terminals T1-T9 in FIG. 2). The upper surface of the apparatus main body 110 is an operation panel in which various switches are arranged, and a circuit described later is built therein.

FIG. 4 shows the details of the configuration of this test apparatus.
An insulation tester 111 and a circuit shown in the figure are built in a device main body 110 shown surrounded by a broken line in the drawing. Insulation tester 11
1 is the same as the insulation tester used in the above-described conventional test, and has a function of testing the insulation state between the lead terminal L and the ground terminal E, and outputs the result to the meter 120. Changeover switch S connected to earth terminal E
S is a switch for switching between the inter-body insulation test and the line insulation test. When the changeover switch SS is on the side in the figure, the inter-body insulation test can be performed, and when it is on the side, the line insulation test is performed. be able to. The switch S0 connected to the lead terminal L is composed of two interlocking switches, and makes either one of the sides of the circuit conductive. Normally, as shown in the figure, the side is in a conducting state. The remaining switches S1 to S9 correspond to the respective pull-through lines L11 to L19, each of which is composed of two interlocking switches, and one of the circuit side and the side is made conductive. In this embodiment, the switches S0 to S9 are push button switches, and all of them are normally in the state of conducting the side, and are configured such that the side is conducting only when the push button is pressed. ..

A single wire extending from the switch S0 side to the right side is led out from the apparatus main body 110 as a ground wire 130. The ground wire 130 is connected to a predetermined portion of the vehicle body of the vehicle 10. On the other hand, a total of 10 wirings, that is, nine wirings extending to the right of the switches S1 to S9 and one wiring 112 extending from the side of the changeover switch SS, are derived from the apparatus main body 110 as lead wires 140. At the tip of the lead wire 140, a connecting plug 1 as shown in FIG.
50 is attached, and the connecting plug 150 is attached to the vehicle 1
By connecting to the wiring socket 200 of 0, the switches S1 to S9 are electrically connected to the terminals T1 to T9, respectively, and further to the pull-through lines L11 to L19. The wiring 112 extending from the changeover switch SS side is electrically connected to the vehicle body of the vehicle 10.

Next, the test work using this test apparatus will be described. The preparation for this test work may be performed by connecting the ground wire 130 to the vehicle body and connecting the lead wire 140 to the wiring socket 200 using the connecting plug 150, as described above. If the vehicle is not provided with the wiring socket 200, a measurement adapter having the same shape as the wiring socket 200 is prepared, and the end portions of the pull-through wires are fixed at predetermined positions in the measurement adapter. Then, the connecting plug 150 may be connected to the measuring adapter.

First, when carrying out the vehicle-body insulation test, the inspector switches the changeover switch SS to the side (the side shown in FIG. 4). Then, in this state, the switch S0
Press to make the side conductive. Then, the insulation tester 111
Will be connected to the vehicle body through the ground wire 130. On the other hand, the ground terminal E of the insulation tester 111 is connected to the vehicle body via the wiring 112. Therefore, the lead terminal L and the ground terminal E are short-circuited, which can be confirmed by the deflection of the needle of the meter 120. This work is a check work for confirming that the wiring 112 is surely electrically connected to the vehicle body.

When the switch S0 is returned to its original state and the side is brought into conduction as shown in the figure, the insulation tester 111
Lead terminal L of switches S1 to S9 and terminal T1
Through T9, it is in a state of being connected to the pull-through lines L11 to L19. On the other hand, since the ground terminal E is connected to the vehicle body, it is possible to perform the vehicle-body insulation test on each of the lead wires L11 to L19. That is, even if one of the pull-through wires L11 to L19 is incompletely insulated from the vehicle body, the lead terminal L to the ground terminal E is disconnected.
Leakage current will flow toward and can be confirmed with the meter 120. If the needle of the meter 120 does not touch, the result that the inter-body insulation test is normal is obtained. If the needle of the meter 120 touches, try pressing the switches S1 to S9 one by one. And meter 1
It is possible to identify the pull-through wire having the insulation failure depending on which switch is pressed when the 20 needles stop touching. For example, the line L1
If 3 is defective in insulation and is in a conductive state with the vehicle body, the circuit of the leakage current will be disconnected if the switch S3 is pressed to bring the side into conduction.

Next, the operation for conducting the line insulation test will be described. In this case, the inspector switches the changeover switch SS to the side. Then, the switch S1 is pressed to make the side conductive. The state at this time is as shown in FIG.
The ground terminal E of the insulation tester 111 is connected to the lead wire L11, and the lead terminal L is connected to all the remaining lead wires L12 to L19. Thereby, the pull-through line L11 and the pull-through lines L12 to L
It is possible to perform a line insulation test with respect to 19. That is, if even one of the lead wires L12 to L19 is incompletely insulated from the lead wire L11, a leakage current flows from the lead terminal L to the ground terminal E, This can be confirmed by the meter 120. If the needle of the meter 120 does not touch, the pull-through line L1
The result of the line insulation test for No. 1 is normal. If the needle of the meter 120 touches, press the switches S2 to S9 to 1 while keeping the switch S1 pressed.
Press each one. Then, depending on which switch is being pushed when the needle of the meter 120 is no longer touching, it is possible to identify the pull-through wire having insulation failure with respect to the pull-through wire L11. For example, when the pull-through wires L11 and L13 have poor insulation, the needle of the meter 120 is touched when only the switch S1 is pressed, but the needle is touched when both the switches S1 and S3 are pressed. Does not touch.

Thus, when the line insulation test for the pull-through line L11 is completed, the switch S1 is returned to the original position,
This time, by pushing switch S2, pull-through line L1
Conduct the line insulation test for 2. In this way, by sequentially pressing the switches S1 to S9 one by one, the line insulation test can be performed for all combinations of the pull-through lines L11 to L19. However,
Theoretically, it is not necessary to press switch S9. This is because if the switch S8 is pressed and a line insulation test is performed on eight lead wires L11 to L18, the test on the ninth lead wire L19 has already been completed. However, in practice, it is preferable to press the switch S9 in order to further confirm the measurement result. Thus, in the normal case, the inspector only needs to sequentially operate the nine buttons to complete all the line insulation tests.

Although the present invention has been described above based on the illustrated embodiment, the present invention is not limited to this embodiment and can be implemented in various modes other than this.
For example, the number of pull-through wires to be tested is not limited to nine, and any number may be used. Further, each switch in the circuit can be configured by a switch using a semiconductor element. Further, when only the line insulation test needs to be performed, the changeover switch SS and the wiring 112 are unnecessary.

[0026]

As described above, according to the railway vehicle insulation test apparatus of the present invention, the connection between each pull-through wire and both terminals of the insulation test apparatus can be switched by a switch. This will reduce the work effort and enable efficient insulation testing.

[Brief description of drawings]

FIG. 1 is a diagram showing a conventional method of a vehicle-body insulation test.

FIG. 2 is a diagram showing a conventional method of line insulation test.

FIG. 3 is an external view of an insulation test apparatus 100 according to an embodiment of the present invention.

FIG. 4 is a detailed view showing an inter-body insulation test method by the insulation test apparatus shown in FIG.

FIG. 5 is a detailed view showing a line insulation test method by the insulation test apparatus shown in FIG.

[Explanation of symbols]

 1 ... Insulation tester 2 ... Ground wire 3 ... Lead wire 4 ... Meter 10, 20, 30, 40 ... Vehicle 100 ... Insulation test device 110 ... Device body 111 ... Insulation tester 112 ... Grounding wire 120 ... Meter 130 ... Ground Wire 140 ... Lead wire 150 ... Connection plug 200 ... Wiring socket C1 to C3 ... Connection wire E ... Ground terminal E1 to E3 ... Ground wire L ... Lead terminal L11 to L19, L21, L31, L41 ... Pull-through wire SS ... Changeover switch S0 to S9 ... Switches T1 to T9, Ta to Tg ... Terminals

Claims (2)

[Claims] 1. An apparatus for performing an insulation test on a plurality of railway wires of a railway vehicle, comprising: a connecting plug having a plurality of electrodes electrically contacting respective end points of each railway wire; Each of the electrodes is connected to the first node L or the second node
A plurality of changeover switches for connecting to any one of the nodes E, and a tester for testing whether or not the first node L and the second node E are electrically short-circuited. An insulation test device for railway vehicles, comprising: 2. The railway vehicle insulation test apparatus according to claim 1, further comprising means for electrically contacting the second node E with the vehicle body of the vehicle.