Track relay test device

Abstract

To provide a track relay test device which can test whether a track relay normally works or breaks down even in a general office or the like.SOLUTION: A track relay test device is composed of: a high-voltage line pair which is an electrical path of high-voltage AC power; a low-voltage line pair which is an electrical path of low-voltage AC power in which the high-voltage AC power of the high-voltage line pair is stepped down and a phase is shifted by a phase adjustment circuit; a changeover switch which selects whether the low-voltage AC power of the low-voltage line pair is supplied to a low-voltage terminal pair of the track relay in a first phase or is supplied in a second phase that is inverted from the first phase, or is not supplied; a track relay connection connector which supplies the high-voltage AC power of the high-voltage line pair to the track relay and supplies the output from the changeover switch to the track relay; and a light emission display part which is electrically connected to an output terminal of the track relay and emits light according to a contact point state of the track relay.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an orbital relay test apparatus that can perform tests on orbital relays with a simple configuration.

Background Art

[0002] An orbital circuit in railway transportation is a device that uses a rail as part of an electric circuit to detect the presence or absence of a train. It transmits a signal from one end of the rail and is configured to detect the presence or absence of a received signal due to a short circuit between the rails by the axle of the train using an orbital relay provided on the other end side of the rail. (For example, refer to Patent Document 1 (Japanese Patent Application Laid-Open No. 2019-147434).) FIG. 6 is a diagram for explaining the electrical connection of the orbital relay 10 in the orbital circuit. The detection sections of the train by the orbital circuit are electrically insulated from each other, and FIG. 6 schematically shows one detection section. Although not shown in FIG. 6, a current related to an information signal regarding another detection section also flows through the rail 3.

[0003] The orbital relay is a relay that determines the presence or absence of a train on the line, etc. in the above-described orbital circuit for train detection and performs contact operations for lighting each of the red, yellow, and green signals. An alternating current of a power source 4 of approximately 105 V flows through the rail 3 via a current-limiting resistor 6 and a first transformer 7. An alternating current of the power source 4 and an information signal related to the presence or absence of a train on the line, etc. that has passed through a second transformer 8 from the rail 3 are input to the orbital relay 10.

[0004] In this specification, the power from the power source 4 (or the "commercial power source" described later) may be referred to as "high-voltage alternating current power", and the power of the information signal that has been stepped down through a transformer or the like may be referred to as "low-voltage alternating current power".

[0005] In the configuration as described above, for example, if a train is present on the line in the detection section shown in FIG. 6 and the space between the respective rails 3 is short-circuited, the low-voltage alternating current power related to the information signal supplied to the orbital relay 10 becomes "0", and the contacts in the orbital relay 10 operate to light the red signal of a signal device (not shown).

[0006] Further, according to whether low-voltage AC power of a certain phase is supplied from the rail 3 to the track relay 10, or whether low-voltage AC power inverted from the low-voltage AC power of the certain phase is supplied, the contacts in the track relay 10 operate to turn on the green signal of a signal (not shown) or to turn on the yellow signal of the signal (not shown). [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-147434 [Summary of the Invention] [Problems to be Solved by the Invention]

[0007] For the renewal of train electrical equipment, an operation of replacing the above-described track relay with a new one may be performed. The new track relay is confirmed to operate normally by tests at the time of shipment from the manufacturer's factory and is then shipped. However, the track relay may malfunction due to vibrations or impacts during transportation of the track relay. Such a malfunction is detected when the operation of the signal is confirmed by short-circuiting between the rails after replacing it with a new track relay at the site.

[0008] Since the replacement work of the track relay is carried out at a precious timing of a limited time from the end of the last train to the start of the first train, it is desirable to be able to grasp in advance that there is some abnormality such as a malfunction in the new track relay if possible before performing the replacement work. However, there is no device for testing whether a new track relay delivered from the manufacturer is normal or not before bringing it to the site, which has been a problem. [Means for Solving the Problems]

[0009] To solve such problems, the track relay test device according to the present invention includes a high-voltage line pair that is an electric circuit of high-voltage alternating current power, a low-voltage line pair that is an electric circuit of low-voltage alternating current power obtained by stepping down the high-voltage alternating current power of the high-voltage line pair and further shifting the phase from the high-voltage alternating current power by a phase adjustment circuit, and supplies the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay in a first phase, or supplies the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay in a second phase that is inverted from the first phase, or does not supply the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay, a switching switch for selection, a connector that supplies the high-voltage alternating current power of the high-voltage line pair to the track relay and supplies the output from the switching switch to the track relay, and a light-emitting display unit that is electrically connected to the output terminal of the track relay and emits light according to the contact condition of the track relay.

[0010] Further, the track relay test device according to the present invention is characterized in that the high-voltage alternating current power of the high-voltage line pair is supplied from a commercial power source.

[0011] Further, the track relay test device according to the present invention is characterized in that the phase adjustment circuit is composed of a parallel connection of a resistor and a capacitor.

[0012] Further, the track relay test device according to the present invention is characterized in that the phase adjustment circuit is composed of a parallel connection of a variable resistor and a variable capacitor.

[0013] Further, the track relay test device according to the present invention is characterized in that the phase adjustment circuit is composed of a parallel connection of a resistor and a coil.

[0014] Further, when the switching switch selects to supply the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay in a first phase, the light-emitting display unit performs a green light-emitting display.

[0015] Further, when the switching switch of the track relay test device according to the present invention selects to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay in the second phase, the light-emitting display unit performs yellow light-emitting display.

[0016] Further, when the switching switch of the track relay test device according to the present invention selects not to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay, the light-emitting display unit performs red light-emitting display.

[0017] Further, the track relay test device according to the present invention includes a main body portion in which an electric circuit is housed, a lid portion attached to the main body portion via a hinge, and a buckle used to maintain an L-shaped posture between the main body portion and the lid portion during the test of the track relay.

[0018] Further, rubber feet are provided on a surface of the main body portion opposite to the surface where the connector is provided.

Effect of the Invention

[0019] The track relay test device according to the present invention includes a high-voltage line pair which is a circuit of high-voltage AC power, a low-voltage line pair which is a circuit of low-voltage AC power obtained by stepping down the high-voltage AC power of the high-voltage line pair and further shifting the phase from the high-voltage AC power by a phase adjustment circuit, a switching switch for selecting whether to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay in the first phase, or to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay in a second phase which is inverted from the first phase, or not to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay, a connector for supplying the high-voltage AC power of the high-voltage line pair to the track relay and supplying the output from the switching switch to the track relay, and a light-emitting display unit electrically connected to the output terminal of the track relay and emitting light according to the contact state of the track relay, and has a very simple configuration.

[0020] And according to such an orbit relay test device according to the present invention, by checking the light-emitting display unit based on the operation of the switching switch, it is possible to test whether the orbit relay operates normally or is faulty even in a general office or the like.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram for explaining the outline of the orbit relay test device 100 according to an embodiment of the present invention, and an example of the main circuit configuration of the orbit relay test device 100 is shown. Further, FIG. 2 is a photograph of the appearance of the orbit relay test device 100 according to an embodiment of the present invention.

[0023] First, the power supply for the track relay test apparatus 100 will be described. For the track relay test apparatus 100 according to the present invention, a 100V AC power supply, which is a commercial power supply used in ordinary households, is supplied. For this purpose, a power cord 70 is used. The power cord 70 has a plug 71, a power outlet 75, and a cord 73 that serves as an electric circuit therebetween. The plug 71 of the power cord 70 is inserted into a commercial power outlet 50 provided on a wall surface or the like, and power is supplied from the power inlet 105 on the side of the track relay test apparatus 100 connected to the power outlet 75 into the apparatus.

[0024] From the power inlet 105, high-voltage AC power from the commercial power supply is supplied to the high-voltage line pairs 120, 120' inside the apparatus. A fuse 106 is provided in the high-voltage line 120 for the purpose of protecting the apparatus against overcurrent and the like. Also, a main switch 110 used to turn on and off the main power supply of the apparatus is provided in the high-voltage line 120.

[0025] A branch to an A / D conversion circuit 180 is provided from the high-voltage line pairs 120, 120' after the main switch 110. The A / D conversion circuit 180 is configured to convert the high-voltage AC power of the high-voltage line pairs 120, 120' into DC power and supply it to the light-emitting display unit 190. A plurality of light-emitting elements are used in the light-emitting display unit 190. In this embodiment, since LEDs (Light Emitting Diodes) are assumed to be used as these light-emitting elements, the A / D conversion circuit 180 is provided. Note that in the present invention, it is not necessarily required to use LEDs as the light-emitting elements, so it is not necessary to always provide the A / D conversion circuit 180.

[0026] Now, further downstream of the branch point to the A / D conversion circuit 180 in the high-voltage line pair 120, 120', there is a branch to the low-voltage line pair 130, 130'. The low-voltage line pair 130, 130' is a circuit for low-voltage AC power in which the high-voltage AC power of the high-voltage line pair 120, 120' is stepped down and the phase is shifted from the high-voltage AC power by a phase adjustment circuit. The voltage of the low-voltage AC power is approximately 1V.

[0027] To convert the high-voltage AC power of the high-voltage line pair 120, 120' into low-voltage AC power, a transformer 140 is provided. Also, a phase adjustment circuit 150 is provided in the low-voltage line 130. FIG. 3 is a diagram showing an example of the phase adjustment circuit 150. The phase adjustment circuit 150 can be configured by connecting a resistor 151 and a capacitor 153 in parallel. The configuration of the phase adjustment circuit 150 is not limited to this, and it can also be configured by combining other passive elements.

[0028] Since the phase adjustment circuit 150 is provided in the low-voltage line pair 130, 130', the phases of the waveforms of the high-voltage AC power and the low-voltage AC power are shifted. In the track relay test apparatus 100 according to the present invention, because such a phase adjustment circuit 150 is provided, it is possible to easily simulate the test of actually installing the track relay 10 at the site.

[0029] Further, a switching switch 170 is provided in the low-voltage line pair 130, 130'. Here, the operation of the switching switch 170 will be described with reference to FIG. 4. The switching switch 170 operates such that two movable contacts 171, 171' are interlocked. Also, it is assumed that the switching of the switching switch 170 is performed manually.

[0030] As shown in FIG. 4(A), when the two movable contacts 171, 171' are in contact with the G terminal, the low-voltage AC power of the low-voltage line pair 130, 130' is supplied to the low-voltage terminal pair 13, 13' of the track relay 10 without changing the phase. Note that the phase at this time may be referred to as the first phase.

[0031] When the two movable contacts 171 and 171' are in contact with the Y terminal as shown in FIG. 4(B), the low-voltage AC power of the low-voltage line pairs 130 and 130' is supplied to the low-voltage terminal pairs 13 and 13' of the track relay 10 with the phase reversed. Note that the phase at this time may be denoted as the second phase.

[0032] When the two movable contacts 171 and 171' are not in contact with either the G or Y terminal as shown in FIG. 4(C), the low-voltage AC power of the low-voltage line pairs 130 and 130' is not supplied to the low-voltage terminal pairs 13 and 13' of the track relay 10.

[0033] In the track relay test apparatus 100 according to the present invention, based on the switching switch 170 as described above, the information signal acquired by the track relay 10 from the actual rail 3 is simulated.

[0034] When the two movable contacts 171 and 171' of the switching switch 170 are in the positions shown in FIG. 4(A), it is assumed that the contacts of the track relay 10 operate so that a green signal is lit in the actual signal.

[0035] Also, when the two movable contacts 171 and 171' of the switching switch 170 are in the positions shown in FIG. 4(B), it is assumed that the contacts of the track relay 10 operate so that a yellow signal is lit in the actual signal.

[0036] Also, when the two movable contacts 171 and 171' of the switching switch 170 are in the positions shown in FIG. 4(C), it is assumed that the contacts of the track relay 10 operate so that a red signal is lit in the actual signal.

[0037] A track relay connection connector 115 is provided at the subsequent stage of the switching switch 170. The track relay connection connector 115 is electrically connected to the high-voltage line pairs 120 and 120', and is also electrically connected to the output from the switching switch 170.

[0038] The track relay 10 has a relay contact operating section 11 in which contacts and the like are housed, high-voltage terminal pairs 12, 12' that extend outward from the relay contact operating section 11 and are used for electrical connection, and low-voltage terminal pairs 13, 13'. Although not shown, the track relay 10 has a plurality of terminal pairs in addition to these terminal pairs, and a signal device electrically connected to these terminals is controlled based on the contact operation of the track relay 10.

[0039] When testing the track relay 10 with the track relay test device 100 according to the present invention, the track relay 10 is fitted to the track relay connection connector 115. As a result, power is supplied from the high-voltage line pairs 120, 120' to the high-voltage terminal pairs 12, 12' of the track relay 10, and the output from the changeover switch 170 is input to the low-voltage terminal pairs 13, 13' of the track relay 10.

[0040] Here, the appearance of the track relay test device 100 according to the present invention will be described with reference to FIG. 2. FIG. 2(A) is a view of the track relay test device 100 according to the present invention as seen from the top surface when stored, and FIG. 2(B) is a perspective view showing a state in which the lid body portion 300 is opened.

[0041] The track relay test device 100 according to the present invention has a main body portion 200 in which an electric circuit is housed and a lid body portion 300 that protects the surface of the main body portion 200 where the track relay connection connector 115 is provided when not in use (when stored). The lid body portion 300 is attached to the main body portion 200 via a hinge 310 and is deployed in the state shown in FIG. 2(B) when testing the track relay 10.

[0042] Further, the main body portion 200 is provided with an operation display portion 210 in which a main switch 110, a changeover switch 170, and a light-emitting display portion 190 are arranged. This operation display portion 210 is protected by an operation display portion cover 215 when stored.

[0043] The lid part 300 and the main body part 200 are provided with a storage buckle 320 that is fastened when the track relay test device 100 is stored, and a test buckle 330 that is fastened when the track relay 10 is tested with the track relay test device 100. FIG. 2(A) shows the state during storage when the storage buckle 320 is fastened, and FIG. 2(B) shows the state during testing when the test buckle 330 is fastened.

[0044] When the test buckle 330 is fastened, the track relay test device 100 maintains an L-shaped posture between the main body part 200 and the lid part 300 during the test of the track relay 10. The weight of the track relay 10 is heavier than the weight of the track relay test device 100. If the test buckle 330 does not exist, when the track relay 10 is fitted to the track relay connection connector 115, the main body part 200 will fall towards the lid part 300. In the track relay test device 100 according to the present invention, by fastening the test buckle 330, such a situation is prevented, and it becomes possible to stably hold the track relay 10 in a horizontal state and conduct the test.

[0045] In the track relay test device 100 according to the present invention, when the track relay 10 is fitted to the track relay connection connector 115, it is assumed that this is done with the surface S (the surface provided with the track relay connection connector 115 and the opposing surface) in FIG. 2 as the bottom surface. This is because it is easier to insert each terminal of the track relay 10 into the track relay connection connector 115 by lowering each terminal of the track relay 10 from directly above and fitting them rather than inserting each terminal into the track relay connection connector 115 from the horizontal direction. In the track relay test device 100 according to the present invention, rubber feet 204 are provided at the four corners of the surface S to stabilize the track relay test device 100 during the operation of fitting the track relay 10 to the track relay connection connector 115.

[0046] Now, returning to FIG. 1, the DC power output from the A / D conversion circuit 180 is supplied to the light-emitting display unit 190, and this light-emitting display unit 190 has a green light-emitting element 191 for operating display of the device itself. This green light-emitting element 191 for operating display lights up when the main switch 110 is turned on and goes out when it is turned off.

[0047] A plurality of terminal pairs (not shown) of the track relay 10 are electrically connected to the light-emitting display unit 190 via the track relay connection connector 115. The portion surrounded by the dashed-dotted line in FIG. 1 that is connected to the light-emitting display unit 190 reflects the status of the contacts within the track relay 10. For the green light-emitting elements, there are three systems of 193, 193', and 193'', for the yellow light-emitting elements, there are three systems of 195, 195', and 195'', and for the red light-emitting element, there is one system of 197, which are provided in the light-emitting display unit 190. In an actual signal, only one signal light controlled by the track relay 10 is lit, so two systems are used for this purpose, and the third system is reserved as a backup.

[0048] In such a light-emitting display unit 190, if the track relay 10 is operating normally, when the two movable contacts 171 and 171' of the changeover switch 170 are in contact with the G terminal, all three systems of the green light-emitting elements 193, 193', and 193'' will light up. Conversely, when the two movable contacts 171 and 171' of the changeover switch 170 are in contact with the G terminal, if even one system of the green light-emitting elements 193, 193', and 193'' does not light up, it can be determined that there is an abnormality in the track relay 10. Also, when the two movable contacts 171 and 171' of the changeover switch 170 are in contact with the G terminal, if there is lighting other than the green light-emitting elements 193, 193', and 193'', it can be determined that there is an abnormality in the track relay 10.

[0049] Also, for a normally operating track relay 10, when the two movable contacts 171 and 171' of the changeover switch 170 are in contact with the Y terminal, all three sets of the yellow light-emitting elements 195, 195', and 195'' will light up. Conversely, if even one set of the yellow light-emitting elements 195, 195', and 195'' does not light up when the two movable contacts 171 and 171' of the changeover switch 170 are in contact with the Y terminal, it can be determined that there is an abnormality in the track relay 10. Also, if there is lighting other than the yellow light-emitting elements 195, 195', and 195'' when the two movable contacts 171 and 171' of the changeover switch 170 are in contact with the Y terminal, it can be determined that there is an abnormality in the track relay 10.

[0050] Also, for a normally operating track relay 10, when the two movable contacts 171 and 171' of the changeover switch 170 are not in contact with either the G or Y terminal, the red light-emitting element 197 will light up. Conversely, if the red light-emitting element 197 does not light up when the two movable contacts 171 and 171' of the changeover switch 170 are not in contact with either the G or Y terminal, it can be determined that there is an abnormality in the track relay 10. Also, if there is lighting other than the red light-emitting element 197 when the two movable contacts 171 and 171' of the changeover switch 170 are not in contact with either the G or Y terminal, it can be determined that there is an abnormality in the track relay 10.

[0051] As described above, the track relay test apparatus 100 according to the present invention includes a high-voltage line pair 120, 120' which is an electric circuit of high-voltage alternating current power, a low-voltage line pair 130, 130' which is an electric circuit of low-voltage alternating current power obtained by stepping down the high-voltage alternating current power of the high-voltage line pair 120, 120' and further shifting the phase from the high-voltage alternating current power by a phase adjustment circuit 150, a switching switch 170 for selecting whether to supply the low-voltage alternating current power of the low-voltage line pair 130, 130' to the low-voltage terminal pair 13, 13' of the track relay at a first phase, or to supply the low-voltage alternating current power of the low-voltage line pair 130, 130' to the low-voltage terminal pair 13, 13' of the track relay 10 at a second phase which is inverted from the first phase, or not to supply the low-voltage alternating current power of the low-voltage line pair 130, 130' to the low-voltage terminal pair 13, 13' of the track relay 10, a track relay connection connector 115 for supplying the high-voltage alternating current power of the high-voltage line pair 120, 120' to the track relay 10 and supplying the output from the switching switch 170 to the track relay 10, and a light-emitting display unit 190 which is electrically connected to the output terminals of the track relay 10 and emits light according to the contact state of the track relay 10, and has a very simple configuration.

[0052] And according to such a track relay test apparatus 100 of the present invention, by checking the light-emitting display unit 190 based on the operation of the switching switch 170, it is possible to test whether the track relay 10 operates normally or is faulty even in a general office or the like.

[0053] Next, another embodiment of the present invention will be described. In another embodiment of the present invention, only the configuration of the phase adjustment circuit 150 in the track relay test apparatus 100 is different from that of the previous embodiment, and the other configurations are the same. Therefore, the description of the same configurations will be omitted. FIG. 5 is a diagram showing the phase adjustment circuit 150 of the track relay test apparatus 100 according to another embodiment of the present invention.

[0054] FIG. 5(A) shows an example in which the phase adjustment circuit 150 is configured by a parallel connection of a variable resistor 152 and a variable capacitor 154. In the previous embodiment, a resistor 151 with a fixed resistance value and a capacitor 153 with a fixed capacitance were used. By the way, since the resistance value of the resistor 151 and the capacitance of the capacitor 153 have tolerances, the phase adjustment circuit 150 using these may not be able to generate a phase shift as desired in some cases. On the other hand, in the present embodiment, since the phase adjustment circuit 150 is composed of the variable resistor 152 and the variable capacitor 154, by adjusting these resistance values and capacitances, it is possible to accurately generate a desired phase shift by the phase adjustment circuit 150. According to the present embodiment, in addition to the effects of the previous embodiment, an effect that the accuracy of the phase adjustment circuit 150 can be improved can be expected.

[0055] FIG. 5(B) shows an example in which the phase adjustment circuit 150 is configured by a parallel connection of a resistor 151 and a coil 155. Also by such an embodiment, it is possible to cause a phase shift between the waveforms of the high-voltage AC power and the low-voltage AC power by the phase adjustment circuit 150. Also by such other embodiments of the present invention, the same effects as those of the previous embodiment can be enjoyed.

Description of Reference Numerals

[0056] 2 ··· Sleeper 3 ··· Rail 4 ··· Power source 6 ··· Current-limiting resistor 7 ··· First transformer 8 ··· Second transformer 10 ··· Track relay 11 ··· Relay contact operating part 12, 12’ ··· High-voltage terminal pair 13, 13’ ··· Low-voltage terminal pair 50 ··· Commercial power outlet 70 ··· Power cord 71 ··· Plug 73 ··· Cord 75 ··· Power outlet 100 ··· Track relay test device 105 ··· Power inlet 106 ··· Fuse 110 ··· Main switch 115 ··· Connector for track relay connection 120, 120’ ··· High - voltage line pair 130, 130’ ··· Low - voltage line pair 140 ··· Transformer 150 ··· Phase - adjustment circuit 151 ··· Resistor 152 ··· Variable resistor 153 ··· Capacitor 154 ··· Variable capacitor 155 ··· Coil 170 ··· Switch 171, 171’ ··· Moving contact 180 ··· A / D conversion circuit 190 ··· Light - emitting display section 191 ··· Green light - emitting element for operation display 193, 193’, 193’’ ··· Green light - emitting elements 195, 195’, 195’’ ··· Yellow light - emitting elements 197 ··· Red light - emitting element 200 ··· Main body 204 ··· Rubber feet 210 ··· Operation and display section 215 ··· Cover for operation and display section 300 ··· Cover body 310 ··· Hinge 320 ··· Storage buckle 330 ··· Test buckle

Claims

1. A high-voltage line pair that is an electric circuit of high-voltage alternating current power, A low-voltage line pair that is an electric circuit of low-voltage alternating current power obtained by stepping down the high-voltage alternating current power of the high-voltage line pair and further shifting the phase from the high-voltage alternating current power by a phase adjustment circuit, Supplying the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay in a first phase, or Supplying the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay in a second phase that is inverted from the first phase, or A changeover switch for selecting whether or not to supply the low-voltage alternating current power of the low-voltage line pair to the low-voltage terminal pair of the track relay, A connector that supplies the high-voltage alternating current power of the high-voltage line pair to the track relay and supplies the output from the changeover switch to the track relay, An optical emission display unit that is electrically connected to the output terminal of the track relay and emits light according to the contact state of the track relay, characterized in that it comprises a track relay test device.

2. The track relay test device according to claim 1, characterized in that the high-voltage alternating current power of the high-voltage line pair is supplied from a commercial power source.

3. The track relay test device according to claim 1 or claim 2, characterized in that the phase adjustment circuit is composed of a parallel connection of a resistor and a capacitor.

4. The track relay test device according to claim 1 or claim 2, characterized in that the phase adjustment circuit is composed of a parallel connection of a variable resistor and a variable capacitor.

5. The track relay test device according to claim 1 or claim 2, characterized in that the phase adjustment circuit is composed of a parallel connection of a resistor and a coil.

6. When the changeover switch selects to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay in the first phase, the light-emitting display unit performs a green light-emitting display. The track relay test device according to any one of claims 1 to 5, characterized in that.

7. When the changeover switch selects to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay in the second phase, the light-emitting display unit performs a yellow light-emitting display. The track relay test device according to any one of claims 1 to 6, characterized in that.

8. When the changeover switch selects not to supply the low-voltage AC power of the low-voltage line pair to the low-voltage terminal pair of the track relay, the light-emitting display unit performs a red light-emitting display. The track relay test device according to any one of claims 1 to 7, characterized in that.

9. A main body part in which an electric circuit is housed, A lid part attached to the main body part via a hinge, A buckle used to maintain an L-shaped posture by the main body part and the lid part during the test of the track relay. The track relay test device according to any one of claims 1 to 8, characterized by having.

10. Rubber feet are provided on the surface opposite to the surface where the connector in the main body part is provided. The track relay test device according to claim 9, characterized in that.

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