CN213517455U

CN213517455U - Relay digital detector

Info

Publication number: CN213517455U
Application number: CN202022616062.9U
Authority: CN
Inventors: 何强; 孙立辉; 朱国军; 赵文懂; 李昶
Original assignee: Beijing Eternal Printing Co ltd
Current assignee: Beijing Eternal Printing Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-06-22
Anticipated expiration: 2030-11-12

Abstract

The invention relates to a relay digital detector which comprises a test connector group and a control connector, wherein the test connector group comprises a normally open test connector group and a normally closed test connector group, two ends of the normally open test connector group are respectively connected with a first fixed contact and a voltmeter, two ends of the normally closed test connector group are respectively connected with a second fixed contact and a voltmeter, one end of the control connector group is connected with the first fixed contact, the other end of the control connector group and the other end of the voltmeter are connected with a power supply module, the first fixed contact and the second fixed contact are two fixed contacts of a change-over switch, and a moving contact of the change-over switch is connected with the power supply module. When the relay digital detector is used, the relay is inserted into the relay digital detector, the change-over switch is operated, the digital voltage value displayed by the voltmeter is compared with the voltage value of the power supply module, the quality of the normally-closed test joint group is further judged, and the quality detection of the relay test joint group and the quality detection of the control joint group are realized.

Description

Relay digital detector

Technical Field

The application relates to the field of relay detection, in particular to a relay digital detector.

Background

The relay is a very widely used device, in order to guarantee the safety and stability of the relay when the relay is put into operation in the circuit after leaving the factory, the quality of the relay needs to be detected before leaving the factory, and the relay may be stored in a warehouse for a long time after the relay is produced.

In the related technology of relay detection, detection equipment such as a universal meter is adopted for measuring the conductivity of each group of contacts of the relay, and then the quality of the relay contacts and the quality of relay internal circuits connected with the contacts are judged.

The relay detection device has the following defects: when people are connected with the contacts of the relay and the internal circuit thereof to carry out quality detection, each group of contacts need to be detected one by means of a detection device, the quality of each contact is judged, when a large number of relays need to be detected, the detection mode can consume time, and the detection efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to improve the efficiency that the relay detected, this application provides a relay digital detector.

The application provides a relay digital detector adopts following technical scheme:

a relay digital detector comprises a test joint group, a control joint group, a power module, a change-over switch and a voltmeter, wherein the test joint group comprises a normally open test joint group and a normally closed test joint group, two ends of the normally closed test joint group are respectively connected with a first fixed contact and the voltmeter, two ends of the normally open test joint group are respectively connected with a second fixed contact and the voltmeter, one end of the control joint group is connected with the first fixed contact, the other end of the control joint group and the other end of the voltmeter are jointly connected with one end of the power module, the first fixed contact and the second fixed contact are two fixed contacts of the change-over switch, and a moving contact of the change-over switch is connected with the other end of the power module.

By adopting the technical scheme, when the relay digital detector is used, the contact of the relay is inserted into the test joint group and the control joint group of the relay digital detector, when the moving contact of the change-over switch is abutted to the second static contact, the power module is connected with the second static contact, then the other end of the power module is returned through the control contact group, the control contact group is electrified, the normally open test joint group in the test joint group is closed, and meanwhile, the normally closed test joint group in the test joint group is synchronously disconnected. One end of the voltmeter is connected with the second fixed contact through the closed normally-open test connector group, the other end of the voltmeter is connected with the power supply module, and at the moment, the digital voltage value displayed by the voltmeter is compared with the voltage value of the power supply module, so that the quality of the normally-open test connector group is judged; when the moving contact of the change-over switch abuts against the first fixed contact, the power supply module is connected with the first fixed contact, then the normally closed test connector group in the test connector group returns to the other end of the power supply module through the voltmeter, and at the moment, the digital voltage value displayed by the voltmeter is compared with the voltage value of the power supply module, so that the quality of the normally closed test connector group is judged. This relay digital detector provides the platform of test relay, when a large amount of relays need to be detected, can be in proper order with relay and test joint group and control joint group link, only need undulant change over switch can test whether normal of relay to the efficiency that the relay detected has been improved.

Further, the voltmeter is a digital display voltmeter.

By adopting the technical scheme, the voltmeter can clearly and visually see the detected voltage value by adopting the digital display voltmeter, and the detection efficiency of the relay is improved.

Furthermore, the device also comprises a relay action indicating lamp, wherein two ends of the relay action indicating lamp are respectively connected with the testing joint group and the power supply module, and the voltmeter is connected with the action indicating lamp in parallel.

By adopting the technical scheme, the relay action indicating lamp connected with the voltmeter in parallel is arranged in the voltmeter, if the relay action indicating lamp is on, the normally open test connector group or the normally closed test connector group in the test connector group is not damaged, otherwise, the normally open test connector group or the normally closed test connector group is damaged; and comparing the observed voltage value of the voltmeter with the actual voltage value of the power supply module, and further judging whether the conductivity of the internal circuit of the normally-open test connector group or the normally-closed test connector group is good or not.

Furthermore, the power supply module comprises a plurality of power supply modules with different power supply grades and a power supply change-over switch connected with the power supply modules.

Through adopting above-mentioned technical scheme, through operation power change over switch, can freely change the magnitude of voltage that supplies power to relay digital detector, conveniently detect the relay of different models.

Furthermore, a detection groove is formed in the top of the relay digital detector, and the test joint group and the control joint group are arranged at the bottom of the groove of the detection groove.

Through adopting above-mentioned technical scheme, install relay digital detector's test joint group and control joint group to relay digital detector's recess bottom, can put the relay card in the recess when carrying out quality testing to the contact of relay, conveniently detect the relay.

Furthermore, a cover plate is arranged above the detection groove.

Through adopting above-mentioned technical scheme, relay digital detector recess top is provided with the apron, the apron can be to the test joint group and the control joint group realization protection on the relay digital detector tank bottom.

Further, the apron below is provided with the first electrically conductive connection piece that is used for the switch-on to normally open the test joint group and is used for the electrically conductive connection piece of second of switch-on normally closed test joint group that is connected with the apron, and first electrically conductive connection piece corresponds with normally open test joint group, and the electrically conductive connection piece of second corresponds with normally closed test joint group, and the apron is connected with the recess along the direction of arranging horizontal slip of test joint group.

By adopting the technical scheme, the relay digital detector needs to detect the quality of the device when in use, before the relay digital detector is used, one end of a moving contact in a change-over switch is connected with a power supply module, the other end of the moving contact is connected with a second fixed contact, a sliding cover plate drives a connecting sheet connected with a cover plate below the cover plate to move, the connecting sheet can be abutted against a normally closed test connector group in a test connector group at the bottom of a groove of the relay digital detector when moving, at the moment, a digital display voltmeter and a relay action indicating lamp are connected with the second fixed contact through a conductive connecting sheet, the other end of the digital display voltmeter is connected with the power supply module, at the moment, the relay digital detector forms a closed passage through the conductive connecting sheet, the relay action indicating lamp is bright, and the relay digital detector is not damaged, and if the relay.

Furthermore, the upper surface of the cover plate is fixedly provided with an anti-slip sheet.

Through adopting above-mentioned technical scheme, make things convenient for the operation of sliding of apron.

To sum up the utility model discloses a technological effect:

1. when the digital relay detector is used, the quality of the internal circuit of the digital relay detector device can be detected through the sliding cover plate.

2. When the device is used, the relay to be detected can be placed in the detection groove, the contact of the relay is connected with the test joint group and the control joint group, and the quality of the detected internal circuit of the relay is judged by observing the numerical value of the relay digital display voltmeter.

3. The inside of the detected relay is judged to be damaged by observing the on and off of the relay action indicating lamp connected with the digital display voltmeter in parallel.

Drawings

FIG. 1 is a schematic diagram of a detection system of the present application apparatus for a relay digital detector.

FIG. 2 is a schematic diagram of a power module of the present application apparatus relay digital detector.

FIG. 3 is a front view of the present application.

FIG. 4 is a schematic view of the structure of the detection slot of the digital detector for relay of the present application.

Fig. 5 is an exploded view of the cover plate of the relay digital tester.

Fig. 6 is a sectional view taken along line a-a in fig. 5.

FIG. 7 is a cross-sectional view along the length of the top of the relay digital tester.

In the figure, 1, a cover plate; 11. anti-slip sheets; 12. a lifting groove; 13. a yielding groove; 14. a traveler; 16. a conductive connecting sheet; 161. a first conductive connection pad; 162. a second conductive connecting sheet; 2. a detection tank; 21. a first groove; 22. a second groove; 23. a third groove; 24. a limiting plate; 25. a control joint group; 26. testing the joint set; 261. a normally open test connector set; 262. a normally closed test joint set; 3. a control panel; 31. a digital display voltmeter; 32. a relay action indicator light; 33. a button; 34. a master switch; 35. a transfer switch; 351. a moving contact; 352. a first fixed contact; 353. a second fixed contact; 36. a commercial power wiring socket; 5. a power supply module; 6. and (4) a detection system.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship, unless otherwise specified.

The embodiments of the present application will be described in further detail with reference to the drawings attached hereto.

Referring to fig. 1, the embodiment of the application discloses a relay digital detector, be provided with power module 5 and detecting system 6 in the relay digital detector, detecting system 6 mainly comprises change over switch 35, control joint group 25, test joint group 26 and digital display voltmeter 31 four bibliographic categories, power module 5 supplies power for whole detecting system 6, digital display voltmeter 31 is parallelly connected with relay action pilot lamp 32, test joint group 26 one end is connected with relay action pilot lamp 32, the other end is connected with change over switch 35, test joint group 26 includes normally open test joint group 261 and normally closed test joint group 262. The switch contact of the relay to be detected is connected with the test connector group 26, and the voltage value displayed by the digital display voltmeter 31 is compared with the voltage value of the power module 5, so that the quality of the detected switch contact of the relay is judged.

Referring to fig. 2, the power module 5 includes a plurality of power supply modules, four power supply modules in this embodiment, and the power supply modules are divided into a first power supply module of 12V, a second power supply module of 24V, a third power supply module of 48V, and a fourth power supply module of 220V according to power supply voltage classes, and the four power supply modules are connected in parallel. One end of the power module 5 is connected with the detection system 6 through an operation switch, the other end is connected with the mains supply through a mains supply wiring socket, and according to the power supply grade of the power supply module, the operation switch comprises a switch SB1 connected with the first power supply module in series, a switch SB2 connected with the second power supply module in series, a switch SB3 connected with the third power supply module in series and a switch SB4 connected with the fourth power supply module in series. The power supply voltage grade of the power supply module 5 is switched through the operation switch, so that power supply detection of relays of various types can be realized.

Referring to fig. 1 again, the change-over switch 35 includes a moving contact 351, a first fixed contact 352 and a second fixed contact 353, and the moving contact 351 and the first fixed contact 352 or the moving contact 351 and the second fixed contact 353 can be switched by operating the change-over switch 35.

The control terminal group 25 and the test terminal group 26 are connected to a changeover switch 35. The test joint group 26 comprises a normally open test joint group 261 and a normally closed test joint group 262, the normally open test joint group 261 is connected with the leading-out end of the normally open contact of the relay to be tested, the normally closed test joint group 262 is connected with the leading-out end of the normally closed contact of the relay, and one normally closed test joint group 263 and one normally open test joint group 261 jointly form a group and correspond to one normally closed contact and one normally open contact which are associated with the same armature of the relay to be tested; the control joint group 25 is connected with the leading-out terminal of the coil in the relay. The second fixed contact 353 is connected to one end of the normally open test contact set 261, the first fixed contact 352 is connected to one end of the normally closed test contact set 262, and the movable contact 351 is connected to one output end of the power module 5. The movable contact 351 is switched to connect with the first fixed contact 352 and the second fixed contact 353 by operating the change-over switch 35.

The other ends of the normally open test connector group 261 and the normally closed test connector group 262 are in short circuit and are connected with one end of the digital display voltmeter 31, and the other end of the digital display voltmeter 31 is connected with the other output end of the power module 5. When the relay digital detector detects the relay, the quality of the detected normally open contact and normally closed contact of the relay can be judged by comparing the voltage value measured by the observation digital voltmeter 31 with the voltage value of the power supply module.

Two ends of the control connector group 25 are respectively connected with the second fixed contact 352 and one end of the digital display voltmeter 31 connected with the power module 5. The two ends of the control connector group 25 are used for being respectively connected with two leading-out ends of a coil of the measured relay, when the moving contact 351 is communicated with the second fixed contact 353, the coil of the measured relay is electrified, the normally open contact of the measured relay is closed for a while, and then the detection of the normally open contact of the relay through the digital display voltmeter 31 is realized.

When the relay detected by the relay digital detector is subjected to quality detection, the contact leading-out end of the relay is connected with the testing connector group 26 of the relay digital detector, wherein the normally open contact leading-out end of the relay is connected with the normally open testing connector group 261, the normally closed contact leading-out end of the relay is connected with the normally closed testing connector group 262, and the coil leading-out end of the relay is connected with the control connector group 25. The change-over switch 35 is operated to connect the moving contact 351 with the first fixed contact 352, the current in the power supply module firstly flows through the moving contact 351 and then flows through the first fixed contact 352 connected with the moving contact 351, then flows through the normally closed test connector group 262 connected with the first fixed contact 352 and the normally closed contact of the tested relay, and then flows through the relay action indicating lamp 32 and returns to the other end of the power supply module 5, and the quality of the tested normally closed contact of the relay is judged by comparing the obtained voltage value with the voltage value of the power supply module 5 by observing the voltage value of the digital display voltmeter 31 connected with the relay action indicating lamp 32 in parallel. When the observed voltage value is smaller than the voltage value of the power supply module, the fact that the conductivity of the normally closed contact of the relay to be measured is poor is indicated; when the observed voltage value is equal to the voltage value of the power supply module, the detected normally closed contact of the relay is good in quality; when the observed voltage value is zero, the circuit of the normally closed contact of the relay is detected to be broken. The movable contact 351 is connected with the second fixed contact 353 by operating the change-over switch 35, at the moment, the coil of the relay is electrified, the normally open contact of the relay connected with the normally open test connector group 353 is closed, the current of the power module 5 flows to the driven contact 351 and passes through the second fixed contact 353, then flows back to the other end of the power module 5 through the relay action indicating lamp 32, the voltage value displayed by the digital display voltmeter 31 is observed, the observed voltage value is compared with the voltage value of the power module, and the quality of the detected normally open contact of the relay is judged.

The relay action indicating lamp 32 comprises an indicating lamp L1 and an indicating lamp L2, the test connector group 26 of the embodiment is divided into two groups, the indicating lamp L1 is connected with one test connector group 26 in series, and the indicating lamp L2 is connected with the other test connector group 26 in series. When the movable contact 351 in the change-over switch 35 is abutted against the first fixed contact 352, if the indicator light L1 and the indicator light L2 are lighted, it indicates that the normally closed contact of the relay can be turned on, and if the indicator light L1 and the indicator light L2 are not lighted, it indicates that the normally closed contact of the relay is damaged; when the change-over switch 35 is operated, the movable contact 351 abuts against the second fixed contact 353, at this time, if the indicator light L1 and the indicator light L2 are lighted, it is indicated that the relay coil and the normally open contact can be connected, and if the indicator light L1 and the indicator light L2 are not lighted, it is indicated that the coil or the normally open contact in the relay is damaged.

Referring to fig. 3 and 4, the power module 5 and the detection system 6 are disposed on a housing of the relay digital detector, a panel 3 is disposed on one side of the housing, a detection groove 2 for mounting a relay to be detected is disposed on an upper surface of the housing, and a cover plate 1 is disposed on the detection groove 2. The digital display voltmeter 31 is installed on one side of the control panel 3, four buttons 33 are arranged on one side of the digital display voltmeter 31, the four buttons 33 are vertically arranged in a direction perpendicular to the horizontal plane, the four buttons 33 respectively correspond to the switch SB1, the switch SB2, the switch SB3 and the switch SB4, and switching between different voltage levels is achieved through the operation buttons 33. Indicator lights L1 and L2 are provided on one side of the four buttons 33, and whether the relay is detected is judged by observing the on/off of the relay operation indicator lights 32 with naked eyes. The main switch 34 for controlling the power supply of the relay digital detector is arranged below the button 33 and on the control panel 3, and when the relay digital detector is not used for a long time, the power is cut off by operating the main switch 34, so that the service life of the equipment is prolonged. A commercial power wiring socket 36 is arranged at one end of the control panel 3 close to the lower left corner, a commercial power line can be plugged into the commercial power wiring socket 36, and a change-over switch 35 is arranged at one side of the operation main switch 34.

Referring to fig. 4 and 5, the detection slot 2 includes three portions, namely a first slot 21, a second slot 22 and a limiting plate 24, the first slot 21 is disposed on the top of the casing, and the control connector set 25 and the two pairs of test connector sets 26 are disposed on the bottom of the first slot 21, the control connector set 25 is parallel to the test connector set 26, the control connector set 25 is close to one end of the first slot 21 in a direction away from the test connector set, the connector structures of the control connector set 25 and the test connector set 26 are composed of two clamping conductive cards close to each other, and in the two clamping conductive sheets, the length of the clamping conductive card close to one end of the control connector set 25 mounted near the right first slot 21 is greater than the height of the clamping conductive sheet.

The second groove 22 is arranged above the first groove 21 and used for installing the cover plate 1, a step shape is formed at the joint of the second groove 22 and the first groove 21, and the height of the second groove 22 is matched with the thickness of the cover plate 1.

Referring to fig. 5 and 6, two side walls of the second groove 22 perpendicular to the arrangement direction of the control connector group 25 and the test connector group 26 are respectively provided with a third groove 23, the third groove 23 is a waist-shaped counter-bore structure formed in the horizontal direction, and the third groove 23 is arranged at one end of the first groove 21 close to the control connector group 25.

The cover plate 1 is rectangular as a whole, the size of the cover plate 1 is matched with the second groove 22, the length of the cover plate 1 is shorter than that of the second groove 22, and two side faces of the cover plate 1, which are close to the end part of the third groove 23, are symmetrically provided with cylindrical sliding columns 14 which horizontally slide in the corresponding third grooves 23.

Referring to fig. 6 and 7, the length of the cover plate 1 is shorter than that of the second groove 22, in an initial state, an abdicating groove 13 is formed between one section of the abdicating groove 22 far away from the third groove 23 and the cover plate 1, and the anti-slip sheet 11 is arranged above the cover plate 1. The cover plate 1 is horizontally slid towards one end of the second groove 22 far away from the third groove 23, and the sliding column 14 horizontally slides in the third groove 23, so that the cover plate 1 can horizontally move; the lifting groove 12 is arranged at one end, close to the abdicating groove 13, of the top of the cover plate 1, when the cover plate 1 slides outwards to abut against the side wall of the second groove 22, the lifting groove 12 is buckled by fingers to lift upwards, and the buckled cover plate 1 is opened.

The limiting plate 24 is arranged above the third groove 23, the upper surface of the limiting plate 24 and the top plane of the relay digital detector are in the same horizontal plane, and an abdicating cavity for the cover plate 1 is formed between the limiting plate 24 and the bottom wall of the second groove 22. When the cover plate 1 does not slide outwards to abut against the side wall of the second groove 22, the lifting groove 12 is buckled by fingers to lift upwards, and the limiting plate 24 positioned above the cover plate 1 can limit the cover plate 1, so that the relay digital detector can be used only after the quality problem of a detection system circuit of the device is confirmed through the operation of the sliding cover plate 1 before the relay digital detector is used.

The conductive connecting sheet 16 is fixedly arranged on the lower surface of the cover plate 1, the conductive connecting sheet 16 is perpendicular to the cover plate 1, the conductive connecting sheet 16 comprises a first conductive connecting sheet 161 and a second conductive connecting sheet 162, and the two conductive connecting sheets 16 are parallel to each other.

The first conductive connecting sheet 161 corresponds to a group of normally open test connector sets 261, when the cover plate 1 is slid in a direction away from the third groove 23, the first conductive connecting sheet 161 is connected with longer clamping conductive sheets of two connectors in the corresponding normally open test connector set 261, and at the moment, the normally open test connector set 261 is in a conducting state under the connecting action of the first conductive connecting sheet 161; the second conductive connecting sheet 162 corresponds to the position of the group of normally closed test connector groups 262, and when the cover plate 1 is slid in the direction away from the third slot 23, the second conductive connecting sheet 162 connects the longer clamping conductive sheets of the two connectors in the corresponding normally closed test connector group 262, and at this time, the normally closed test connector group 262 is in a conducting state under the connecting action of the second conductive connecting sheet 162. In a preferred example, the group 261 of normally open test contacts to which the first conductive pad 161 is connected does not belong to the same group 26 of normally closed test contacts 262 to which the second conductive pad 162 is connected.

When the relay digital detector needs to be used, firstly, the cover plate 1 is slid, so that the first conductive connecting sheet 161 is communicated with a group of normally open test connector groups 261, and the second conductive connecting sheet 162 is communicated with a group of normally closed test connector groups 262; the main switch 34 is opened, the change-over switch 35 is operated, the moving contact 351 is connected with the first fixed contact 352, and at this time, if the numerical value displayed by the digital display voltmeter 31 is the voltage value of the power supply, and the corresponding indicator light L1 or the indicator light L2 is in a bright state, it indicates that the circuit communicated with the normally closed test connector group 262 of the relay digital detector has no problem; when the change-over switch 35 is operated again, the moving contact 351 is connected with the second fixed contact 353, at this time, the numerical value displayed by the digital display voltmeter 31 is the voltage value of the power supply, and the corresponding indicator light L1 or the indicator light L2 is in a bright state, which indicates that the circuit communicated with the normally open test connector set 261 and the control connector set 25 of the relay digital detector has no problem. The arrangement of the first conductive connecting sheet 161 and the second conductive connecting sheet realizes the self-detection of the internal power-on circuit of the relay digital detector.

Before the relay digital detector is used, firstly, a power supply is switched on, a main switch 36 is turned on, the cover plate 1 is slid, the cover plate 1 is abutted to the side wall, far away from the third groove 23, of the second groove 22, the change-over switch 35 is adjusted, and whether the real data of the digital display voltmeter 31 and the relay action indicating lamp 32 work normally or not is tested. When the digital display voltmeter 31 and the relay action indicating lamp 32 both work normally, it indicates that the internal circuit of the relay digital detector is normal. And then the main switch 36 is disconnected, the relay is placed in the detection groove 2, so that the normally open contact, the normally closed contact and the coil contact of the relay are respectively connected with the test connector group 26 and the control connector group 25, the main switch 36 is opened, the change-over switch 35 is adjusted, and whether the contact of the relay to be detected is normal or not is judged according to the display states of the digital display voltmeter 31 and the relay action indicating lamp. This relay digital detector provides the platform of test relay, when a large amount of relays need to be detected, can be connected relay and test connector group 26 and control connector group 25 in proper order, only need undulant change over switch can test whether normal of relay to the efficiency that the relay detected has been improved.

The above specific embodiments are merely illustrative of the present application and are not restrictive, and those skilled in the art can modify the present embodiments without inventive contribution as required after reading the present specification, but only fall within the scope of the claims of the present application.

Claims

1. A relay digital detector is characterized in that: the device comprises a test joint group (26), a control joint group (25), a power module (5), a transfer switch (35) and a voltmeter (4), wherein the test joint group (26) comprises a normally-open test joint group (261) and a normally-closed test joint group (262), two ends of the normally-open test joint group (261) are respectively connected with a second static contact (353) and the voltmeter (4), two ends of the normally-closed test joint group (262) are respectively connected with a first static contact (352) and the voltmeter (4), one end of the control joint group (25) is connected with the first static contact (352), the other end of the control joint group (25) and the other end of the voltmeter (4) are jointly connected with one end of the power module (5), the first fixed contact (352) and the second fixed contact (353) are two fixed contacts of a transfer switch (35), and a moving contact (351) of the change-over switch (35) is connected with the other end of the power module (5).

2. The relay digital detector of claim 1, wherein: the voltmeter (4) is a digital display voltmeter (31).

3. The relay digital detector of claim 1, wherein: still include relay action pilot lamp (32), test joint group (26) and power module (5) are connected respectively to the both ends of relay action pilot lamp (32), voltmeter (4) with the action pilot lamp is parallelly connected.

4. The relay digital detector of claim 1, wherein: the power supply module (5) comprises a plurality of power supply modules with different power supply grades and a power supply change-over switch connected with the power supply modules.

5. The relay digital detector of claim 1, wherein: the relay digital detector is characterized in that a detection groove (2) is formed in the top of the relay digital detector, and the test joint group (26) and the control joint group (25) are arranged at the bottom of a groove of the detection groove (2).

6. The relay digital detector of claim 5, wherein: and a cover plate (1) is arranged above the detection groove (2).

7. The relay digital detector of claim 6, wherein: the cover plate is characterized in that a first conductive connecting sheet (161) which is connected with the cover plate (1) and used for connecting a normally-open testing connector group (261) and a second conductive connecting sheet (162) which is used for connecting a normally-closed testing connector group (262) are arranged below the cover plate (1), and the cover plate (1) and the detection groove (2) are connected in a horizontal sliding mode along the arrangement direction of the testing connector group (26).

8. The relay digital detector of claim 7, wherein: the upper surface of the cover plate (1) is fixedly provided with an anti-slip sheet (11).