Low-voltage electrician examination equipment and examination system

Abstract

The utility model provides low-voltage electrician examination equipment and an examination system, and relates to the technical field of low-voltage electrician examination, and the low-voltage electrician examination equipment comprises an examination equipment main body, an examination equipment host, a simulation light wiring examination system and a three-phase motor wiring examination system, and the top of the examination equipment main body is provided with five operation panels. A main switch, a fuse, an LED digital screen and a paper delivery button are arranged at the corner of one side of the top of the examination equipment main body; the technical key points are as follows: an examination equipment host, five operation panels, a main switch, a fuse, an LED digital screen and a paper delivery button are assembled on the basis of an examination equipment main body, and a simulation light wiring examination system and a three-phase motor wiring examination system are formed on the basis of internal circuits and devices of the examination equipment main body; parts needing wiring operation are arranged on the surface of the operation panel, so that students can quickly complete corresponding wiring assessment work on the assessment equipment main body, invigilation is not needed, and the assessment efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrician assessment, in particular to a low-voltage electrician assessment device and an assessment system. Background Art

[0002] Electrician certificates are divided into two types: high voltage electrician and low voltage electrician. However, to obtain these two electrician certificates or one of them, you need to undergo short-term training, and finally pass the examinations of the State Administration of Work Safety and the Labor Department. Only those who are issued electrician certificates by the functional appraisal institutions of the State Administration of Work Safety and the Labor Department can engage in electrical work.

[0003] Low-voltage electricians refer to professional technicians who are responsible for the installation, commissioning, operation, maintenance and upkeep of low-voltage electrical appliances in low-voltage power systems. Low-voltage electricians need to have certain electrical technical knowledge and skills, and be able to install, wire and commission electrical equipment according to engineering design plans, construction drawings and standard specifications, and in accordance with relevant safety, quality, and construction period requirements, and perform maintenance and troubleshooting of equipment. Low-voltage electricians also need to have a certain level of safety awareness and emergency response capabilities, and be able to effectively prevent and respond to safety accidents that may occur during the operation of electrical equipment.

[0004] Traditional low-voltage electrician training and assessment are generally completed through theoretical teaching assessment, student practical examination, and manual scoring by the invigilator. This training and assessment method has the problem that the assessment equipment is not powered, there is a difference with the actual site, the assessment time is long, and a lot of manpower and material resources are wasted for invigilation. The training and assessment efficiency is low, which is not conducive to large-scale training and assessment. Utility Model Content

[0005] In order to overcome the shortcomings that the existing low-voltage electrician training and assessment generally adopts the method of theoretical teaching assessment, student practical examination, and manual scoring by the invigilator, the assessment equipment is not powered on, there is a difference with the actual site, the assessment time is long, a lot of manpower and material resources are wasted for invigilation, the training and assessment efficiency is low, and it is not conducive to large-scale training and assessment, the embodiment of the present application provides a low-voltage electrician assessment equipment and assessment system, by relying on the assessment equipment body to assemble the assessment equipment host, five operation panels, a main switch, a fuse (6), an LED digital screen and a hand-in button, forming a two-phase knife switch QS, a leakage protection, and a double-control switch S 1. A simulated lighting wiring assessment system is composed of a double-control switch S2, a light bulb EL, a fluorescent lamp 1, a fluorescent lamp 2, a single-control switch S3, a ballast, an air switch QF1, QF2, a socket 1 and a socket 2, etc., and a three-phase motor wiring assessment system is formed by a three-phase knife QS, a fuse FU, an AC contactor KM, a thermal relay FR, a forward button SB1, a reverse button SB2, a stop button SB3 and a motor M, etc. The components that trainees need to connect are arranged on the surface of the operation panel, so that trainees can quickly complete the corresponding wiring assessment work on the main body of the assessment equipment without the need for invigilation, and the assessment efficiency is high.

[0006] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0007] A low-voltage electrician test equipment comprises a test equipment body and a test equipment host, wherein the test equipment host is assembled and connected to the middle of the test equipment body;

[0008] Among them, five operation panels are arranged on the top of the main body of the assessment equipment, and the five operation panels surround the top of the main body of the assessment equipment. A tool cabinet is arranged at the bottom of the main body of the assessment equipment. A main switch, a fuse, an LED digital screen and a paper submission button are arranged at the corner on one side of the top of the main body of the assessment equipment. An indicator light is arranged on the surface of the three operation panels on one side, and three indicator lights are arranged on the surface of the operation panel at the top of the other side.

[0009] Preferably, the five operation panels are all made of acrylic plate material.

[0010] A low-voltage electrician assessment system includes a simulated lighting wiring assessment system, which is arranged in a low-voltage electrician assessment device. The simulated double-control lighting wiring assessment system includes a two-phase knife switch QS, a leakage protector, a double-control switch S1, a double-control switch S2 and a light bulb EL, and also includes a fluorescent lamp 1, a fluorescent lamp 2, a single-control switch S3 and a ballast, and also includes air switches QF1, QF2, a socket 1 and a socket 2.

[0011] Preferably, the two-phase knife switch QS, leakage protection device, double-control switch S1, double-control switch S2 and light bulb EL constitute a simulated double-control lamp wiring system, and the two-phase knife switch QS, leakage protection device, double-control switch S1, double-control switch S2 and light bulb EL are all arranged on the surface of an operation panel located at a corner at the top of the assessment equipment body, and the operation panel and the main switch are respectively located on both sides of the top of the assessment equipment body.

[0012] Preferably, the two-phase switch QS, leakage protection, fluorescent lamp 1, fluorescent lamp 2, single-control switch S3 and ballast constitute a simulated single-control fluorescent lamp wiring system, and the fluorescent lamp 1, fluorescent lamp 2, single-control switch S3 and ballast are all arranged on the surface of the operation panel at the top center of the assessment equipment body, and the operation panel is located on the top of the assessment equipment host.

[0013] Preferably, the two-phase knife switch QS, leakage protection, air switches QF1, QF2, socket 1 and socket 2 constitute an analog sub-control socket wiring system, and the air switches QF1, QF2, socket 1 and socket 2 are all arranged on the surface of the operation panel on one side of the middle part of the assessment equipment body. The operation panel is located on one side of the assessment equipment host, and is located on both sides of the assessment equipment body respectively with the main switch.

[0014] A low-voltage electrician assessment system includes a three-phase motor wiring assessment system, which is arranged in a low-voltage electrician assessment device. The three-phase motor wiring assessment system includes a three-phase switch QS, a fuse FU, an AC contactor KM, a thermal relay FR, a forward button SB1, a reverse button SB2, a stop button SB3 and a motor M.

[0015] Preferably, after the three-phase switch QS, fuse FU, AC contactor KM, thermal relay FR, forward button SB1, reverse button SB2, stop button SB3 and motor M are connected in sequence, there are three states: three-phase motor inching circuit wiring, three-phase motor self-locking circuit wiring and three-phase motor contactor interlocking forward and reverse circuit wiring.

[0016] Preferably, the motor M is provided with a forward and reverse rotation indicator light.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] In this scheme, by relying on the main body of the assessment equipment to assemble the assessment equipment host, five operation panels, main switch, fuse, LED digital screen and hand-in button, a simulated lighting wiring assessment system is formed, which is composed of two-phase knife switch QS, leakage protection, double-control switch S1, double-control switch S2, light bulb EL, fluorescent lamp 1, fluorescent lamp 2, single-control switch S3, ballast, air switch QF1, QF2, socket 1 and socket 2, etc., and a three-phase motor wiring assessment system is formed, which is composed of three-phase knife switch QS, fuse FU, AC contactor KM, thermal relay FR, forward button SB1, reverse button SB2, stop button SB3 and motor M, etc., so that the trainees need to arrange the wiring components on the surface of the operation panel, so that the trainees can quickly complete the corresponding wiring assessment work on the main body of the assessment equipment, without the need for invigilation, and the assessment efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is the front view of the utility model;

[0021] Figure 3 This is the circuit diagram of the utility model's simulated lighting wiring assessment system;

[0022] Figure 4 The utility model is a circuit diagram of a three-phase motor wiring assessment system.

[0023] Description of the drawings: 1. Operation panel; 2. Assessment equipment host; 3. Assessment equipment body; 4. Tool cabinet; 5. Main switch; 6. Fuse; 7. LED digital screen; 8. Submission button. DETAILED DESCRIPTION

[0024] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0025] Embodiment 1:

[0026] This embodiment introduces a low voltage electrician assessment device. Figure 1-Figure 2 As shown, it includes an assessment device body 3 and an assessment device host 2 assembled and connected to the middle of the assessment device body 3, five operation panels 1 are arranged on the top of the assessment device body 3, a tool cabinet 4 is arranged at the bottom of the assessment device body 3, and a main switch 5, a fuse 6, an LED digital screen 7 and a paper submission button 8 are arranged at the corner on one side of the top of the assessment device body 3;

[0027] Among them, five operation panels 1 surround the top of the main body 2 of the assessment equipment. By setting an indicator light on the surface of each of the three operation panels 1 located on one side, corresponding to three topics, namely, double-control lamp wiring, single-control fluorescent lamp wiring, and double-control socket wiring, and the surface of the operation panel 1 located on the top of the other side is provided with three indicator lights, representing the three-phase motor inching circuit wiring, three-phase motor self-locking circuit wiring and three-phase motor contactor interlocking forward and reverse circuit wiring. Instructions can be given to students during the assessment process;

[0028] Secondly, by using acrylic plate material to make five operation panels 1, the operation components can be highlighted during the student's operation. During the operation, the operation time can be observed through the LED digital screen 7. After completing the operation, the test can be completed through the submit button 8 and wait for the next student to be tested.

[0029] Embodiment 2:

[0030] Based on Example 1, this example introduces a specific structure of a low-voltage electrician assessment system, which includes a simulated lighting wiring assessment system and a three-phase motor wiring assessment system, and the simulated lighting wiring assessment system and the three-phase motor wiring assessment system are both arranged in the low-voltage electrician assessment equipment;

[0031] like Figure 3 As shown, the simulated double-control lamp wiring assessment system includes a two-phase knife switch QS, a leakage protection device, a double-control switch S1, a double-control switch S2 and a light bulb EL, and also includes a fluorescent lamp 1, a fluorescent lamp 2, a single-control switch S3 and a ballast, and also includes air switches QF1, QF2, sockets 1 and 2;

[0032] Among them, the two-phase knife QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL constitute a simulated double-control light wiring system, thus forming a simulated double-control light wiring assessment system. The power-off and power-on sequence is correct, the two sub-control switches are opened and closed, the light bulb is on and off, the signal is collected, the positive and negative poles of the fluorescent lamp are energized, and the electric meter is energized, then the wiring is correct;

[0033] At the same time, the two-phase switch QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL are all arranged on the surface of the operation panel 1 located at a corner of the top of the assessment equipment body 3, and the operation panel 1 and the main switch 5 are respectively located on both sides of the top of the assessment equipment body 3;

[0034] When students are taking the assessment:

[0035] Connect the live wire L and the neutral wire N to the incoming terminal of the two-phase knife switch QS, connect the outgoing terminal of the two-phase knife switch QS to the incoming terminal of the leakage protection device, and then connect the outgoing terminal 2 of the leakage protection device to the common terminal 11 of the double-control switch S1, connect the normally closed point 9 of the double-control switch S1 to the normally open point 13 of the double-control switch S2, connect the normally open point 10 of the double-control switch S1 to the normally closed point 12 of the double-control switch S2, and then connect the common terminal 14 of the double-control switch S2 to the pin 5 of the light bulb EL, and connect the pin 3 of the light bulb EL to the outgoing terminal 1 of the leakage protection device;

[0036] When the two-phase knife is closed, the leakage protection is turned on, S1 is closed, the circuit is connected, and the bulb EL is on. When S2 is closed, the circuit is connected, and the bulb EL is on. When S1 or S2 is closed, the circuit is disconnected and the bulb is off. In this way, the two double-control switches control the on and off of the bulb respectively. The candidate is tested on the wiring of the double-control lamp;

[0037] Secondly, the two-phase knife QS, leakage protection, double-control switch S1, double-control switch S2 and bulb EL constitute a simulated double-control lamp wiring system, thus forming the question 2 in the simulated double-control lamp wiring assessment system. The power-off sequence is correct. After the wiring is correct, turn on and off the switch, the fluorescent lamp turns on and off, the signal is collected, the power-off sequence, the meter has power, and the positive and negative poles of the fluorescent lamp have power, then the wiring is correct.

[0038] At the same time, the two-phase knife switch QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL are arranged on the surface of the operation panel 1 located at a corner of the top of the assessment equipment body 3. The operation panel 1 and the main switch 5 are respectively located on both sides of the top of the assessment equipment body 3;

[0039] When students are taking the assessment:

[0040] Connect the live wire L and the neutral wire N to the incoming line of the two-phase switch QS, connect the outgoing line of the two-phase switch QS to the incoming line of the leakage protection device, and then connect the outgoing line 2 of the leakage protection device to the pin 4 of the single-control switch S3, and then connect the incoming line input 15 of the ballast from the pin 6 of S3, and connect the other incoming line input 16 of the ballast to the outgoing line 1 of the leakage protection device. The output 17 of the ballast is connected to the input 23 of the fluorescent tube 1, the output 24 of the fluorescent tube 1 is connected to the output 18 of the ballast, the output 19 of the ballast is connected to the input 25 of the fluorescent tube 2, and the output 26 of the fluorescent tube 2 is connected to the output 20 of the ballast.

[0041] When the two-phase knife is closed, the leakage protection is connected, and S3 is closed, the fluorescent lamp circuit is connected, the fluorescent lamp is on, and S3 is disconnected, the fluorescent lamp goes out, and the single-control switch is tested for the control wiring of the fluorescent lamp;

[0042] Secondly, the two-phase knife QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL constitute a simulated double-control light wiring system, thus forming the question three in the simulated double-control light wiring assessment system. The power-off sequence is correct, the positive and negative poles of the two sockets have power, the ground wire has power, the meter has power, and the signal acquisition power-off sequence, the ground wire has power, and the two sockets have power;

[0043] At the same time, the two-phase knife switch QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL are arranged on the surface of the operation panel 1 located at a corner of the top of the assessment equipment body 3. The operation panel 1 and the main switch 5 are respectively located on both sides of the top of the assessment equipment body 3;

[0044] When students are taking the assessment:

[0045] Connect the live wire L and the neutral wire N to the incoming terminal of the two-phase knife switch QS, and connect the outgoing terminal of the two-phase knife switch QS to the incoming terminal of the leakage protection device. Connect the outgoing terminal 2 of the leakage protection device to the incoming terminal 27 of the air switch QF1, and connect the outgoing terminal 29 of the air switch QF1 to the pin 33 of the socket 1, and then to the pin 35. Then connect the outgoing terminal 2 of the leakage protection device to the incoming terminal 28 of the air switch QF2, and connect the outgoing terminal 30 of the air switch QF2 to the pin 39 of the socket 2, and then to the pin 40. Connect the pin 37 of the socket 2 to the pin 32 of the socket 1, and then to the outgoing terminal 1 of the leakage protection device. Finally, connect the pin 33 of the socket 1 to the pin 38 of the socket 2 to the PE. The candidates are tested on their wiring of the sub-control sockets.

[0046] like Figure 4 As shown, the three-phase motor wiring test system includes a three-phase switch QS, a fuse FU, an AC contactor KM, a thermal relay FR, a forward button SB1, a reverse button SB2, a stop button SB3 and a motor M with a forward and reverse indicator light;

[0047] Among them, after the three-phase knife QS, fuse FU, AC contactor KM, thermal relay FR, forward button SB1 green, reverse button SB2 black, stop button SB3 red and motor M are connected in sequence, there are three states: three-phase motor jog circuit wiring, three-phase motor self-locking circuit wiring and three-phase motor contactor interlock forward and reverse circuit wiring, thus forming three questions;

[0048] Question 1: Wiring test of three-phase motor inching circuit. The power-off sequence is correct. Press the green button, the motor forward indicator light is on, release the green button, the motor indicator light goes out. Signal detection: power-off sequence, the forward indicator light has power, and the ground wire has power. The specific test operation is as follows:

[0049] First, complete the main circuit wiring. Connect the three-phase electricity L1, L2, and L3 to the input end of the three-phase knife QS. Connect the output ends 1, 2, and 3 of the three-phase knife QS to the input ends 4, 5, and 6 of fuse FU1, fuse FU2, and fuse FU3. Connect the output ends 9, 10, and 11 of fuse FU1, fuse FU2, and fuse FU3 to the main contact input ends 14, 15, and 16 of AC contactor KM1. Connect the main contact output ends 26, 27, and 28 of AC contactor KM1 to the input ends 46, 47, and 48 of the thermal relay. Connect the output ends 49, 50, and 51 of the thermal relay to the motor M. The motor M is connected to PE.

[0050] Then, the control circuit wiring is carried out, from the second phase L2 of the three-phase electricity to the input terminal 7 of the fuse FU4, from the output terminal 12 of the fuse FU4 to the normally closed contact input terminal 52 of the thermal relay, from the normally closed contact output terminal 53 of the thermal relay to the input terminal 56 of the forward button SB1, from the output terminal 58 of the forward button SB1 to the coil input terminal 17 of the AC contactor KM1, from the coil output terminal 29 of the AC contactor KM1 to the output terminal 13 of the fuse FU5, and from the input terminal 8 of the fuse FU5 to the third phase L3 of the three-phase electricity;

[0051] Finally, press the green button, the coil of AC contactor KM1 loses power, the main contacts of AC contactor close, the main circuit is connected, and the forward indicator light turns on. Release the green button, the coil of AC contactor KM1 loses power, the main contacts of AC contactor are disconnected, and the forward indicator light turns off. This tests the candidate's three-phase motor jog circuit wiring;

[0052] Question 2: The candidate's three-phase motor inching circuit wiring test is correct in the power-off sequence. Press the green button and the motor forward indicator lights up. Release the green button and the motor remains on. Press the red button and the motor indicator goes out. Signal detection: Power-off sequence, the forward indicator has power, the ground wire has power, and the self-locking signal has power. The specific test operations are as follows:

[0053] First, complete the main circuit wiring. Connect the three-phase electricity L1, L2, and L3 to the input end of the three-phase knife QS. Connect the output ends 1, 2, and 3 of the three-phase knife QS to the input ends 4, 5, and 6 of fuse FU1, fuse FU2, and fuse FU3. Connect the output ends 9, 10, and 11 of fuse FU1, fuse FU2, and fuse FU3 to the main contact input ends 14, 15, and 16 of AC contactor KM1. Connect the main contact output ends 26, 27, and 28 of AC contactor KM1 to the input ends 46, 47, and 48 of the thermal relay. Connect the output ends 49, 50, and 51 of the thermal relay to the motor M. The motor M is connected to PE.

[0054] Then the control circuit wiring is carried out, from the second phase L2 of the three-phase electricity to the input terminal 7 of the fuse FU4, from the output terminal 12 of the fuse FU4 to the normally closed contact input terminal 52 of the thermal relay, from the normally closed contact output terminal 53 of the thermal relay to the input terminal 65 of the stop button SB3, from the output terminal 67 of the stop button SB3 to the input terminal 56 of the forward button SB1, from the output terminal 58 of the forward button SB1 to the coil input terminal 17 of the AC contactor KM1, from the coil output terminal 29 of the AC contactor KM1 to the output terminal 13 of the fuse FU5, from the input terminal 8 of the fuse FU5 to the third phase L3 of the three-phase electricity, from the input terminal 56 of the forward button SB1 to the auxiliary normally open contact input terminal 21 of the AC contactor KM1, and from the auxiliary normally open contact output terminal 25 of the AC contactor KM1 to the output terminal 58 of the forward button SB1;

[0055] Finally, press the green button, the coil of AC contactor KM1 is energized, the main contacts of the AC contactor are closed, the main circuit is connected, and the forward indicator light is on. Release the green button, because the AC contactor main contacts are closed, the auxiliary normally open contacts of the contactor are closed, the contactor coil is still energized, and the forward indicator light is always on. Press the red button, the coil of AC contactor KM1 is de-energized, the main contacts of the AC contactor are disconnected, and the forward indicator light goes out. The candidate's three-phase motor self-locking circuit wiring is tested;

[0056] Question 3: Wiring test of the forward and reverse circuit of the three-phase motor contactor interlock. The power-off sequence is correct. Press the green button, the motor forward indicator light is on, release the green button, the motor remains on, press the red button, the motor indicator light goes out. Press the black button, the motor reverse button is on, release the black button, the motor reverse button remains on, press the red button, the motor reverse indicator light goes out, signal detection: the power-off sequence, the forward indicator light has power, the ground wire has power, the forward self-locking signal has power, the reverse indicator light has power, and the reverse self-locking signal has power. The specific test operations are as follows:

[0057] First, complete the main circuit wiring. Connect the three-phase power L1, L2, and L3 to the input end of the three-phase knife QS. Connect the output ends 1, 2, and 3 of the three-phase knife QS to the input ends 4, 5, and 6 of the fuses FU1, FU2, and FU3. Connect the output ends 9, 10, and 11 of the fuses FU1, FU2, and FU3 to the main contact input ends 14, 15, and 16 of the AC contactor KM1. Then connect the main contact output ends 26, 27, and 28 of the AC contactor KM1 to the thermal relay. The input terminals 46, 47, 48 of the thermal relay are connected to the motor M from the output terminals 49, 50, 51 of the thermal relay, and the motor M is connected to PE. The main contact input terminals 14, 15, 16 of the AC contactor KM1 are connected to the main contact input terminals 30, 31, 32 of the AC contactor KM2. The main contact output terminals 42, 43, 44 of the AC contactor KM2 are connected to the main contact output terminals 27, 26, 28 of the AC contactor KM1. At the same time, L3 in the three-phase power should be kept unchanged, and L1 and L2 should be swapped.

[0058] Then, the control circuit is connected, from the second phase L2 of the three-phase power to the input terminal 7 of the fuse FU4, from the output terminal 12 of the fuse FU4 to the normally closed contact input terminal 52 of the thermal relay, from the normally closed contact output terminal 53 of the thermal relay to the input terminal 65 of the stop button SB3, from the output terminal 67 of the stop button SB3 to the input terminal 56 of the forward button SB1, from the output terminal 58 of the forward button SB1 to the auxiliary normally closed contact input terminal 36 of the AC contactor KM2, and from the AC The auxiliary normally closed contact output terminal 40 of the contactor KM2 is connected to the coil input terminal 17 of the AC contactor KM1, the coil output terminal 29 of the AC contactor KM1 is connected to the output terminal 13 of the fuse FU5, the input terminal 8 of the fuse FU5 is connected to the third phase L3 of the three-phase power, the input terminal 56 of the forward button SB1 is connected to the auxiliary normally open contact input terminal 21 of the AC contactor KM1, and the auxiliary normally open contact output terminal 25 of the AC contactor KM1 is connected to the output terminal 58 of the forward button SB1;

[0059] Next, the input terminal 56 of the forward button SB1 is connected to the input terminal 60 of the reverse button SB2, the output terminal 62 of the reverse button SB2 is connected to the auxiliary normally closed contact input terminal 20 of the AC contactor KM1, the auxiliary normally closed contact output terminal 24 of the AC contactor KM1 is connected to the coil input terminal 33 of the AC contactor KM2, the coil output terminal 45 of the AC contactor KM2 is connected to the coil output terminal 29 of the AC contactor KM1, the input terminal 60 of the reverse button SB2 is connected to the auxiliary normally open contact input terminal 37 of the AC contactor KM2, and the auxiliary normally open contact output terminal 41 of the AC contactor KM2 is connected to the output terminal 62 of the reverse button SB2;

[0060] Finally, press the green button, the coil of AC contactor KM1 is energized, the main contacts of the AC contactor are closed, the main circuit is connected, and the forward indicator light is on. Release the green button, because the main contacts of the AC contactor are closed, the auxiliary normally open contacts of the contactor are closed, the contactor coil is still energized, and the forward indicator light is always on.

[0061] After pressing the black button, the coil of AC contactor KM2 is energized, the main contacts of the AC contactor are closed, the main circuit is connected, and the reverse indicator light is on. Release the black button, the auxiliary normally open contacts of the contactor are closed due to the closing of the main contacts of the AC contactor, the contactor coil is still energized, and the reverse indicator light is always on.

[0062] When the red button is pressed, the coil of the AC contactor KM1 or KM2 loses power, the main contacts of the AC contactor are disconnected, and the forward indicator light or the reverse indicator light goes out, which tests the candidate's forward and reverse circuit wiring of the three-phase motor.

[0063] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A low voltage electrician assessment device, characterized in that: include: Assessment equipment body (3); The assessment device host (2) is assembled and connected to the middle of the assessment device body (3); The top of the assessment device body (3) is provided with five operation panels (1), the five operation panels (1) surround the top of the assessment device host (2), the bottom of the assessment device body (3) is provided with a tool cabinet (4), a main switch (5), a fuse (6), an LED digital screen (7) and a paper submission button (8) are provided at a corner on one side of the top of the assessment device body (3), the surfaces of the three operation panels (1) on one side are each provided with an indicator light, and the surface of the operation panel (1) at the top of the other side is provided with three indicator lights.

2. A low voltage electrician assessment device and assessment system as claimed in claim 1, characterized in that: The five operating panels (1) are all made of acrylic plate material.

3. A low-voltage electrician assessment system, comprising a simulated lighting wiring assessment system, wherein the simulated lighting wiring assessment system is arranged in any low-voltage electrician assessment device in claims 1 to 2, and is characterized in that: The simulated double-control lamp wiring assessment system includes a two-phase knife switch QS, a leakage protector, a double-control switch S1, a double-control switch S2 and a bulb EL, and also includes a fluorescent lamp 1, a fluorescent lamp 2, a single-control switch S3 and a ballast, and also includes air switches QF1, QF2, socket 1 and socket 2.

4. A low voltage electrician assessment system as claimed in claim 3, characterized in that: The two-phase switch QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL constitute a simulated double-control lamp wiring system; The two-phase switch QS, leakage protection, double-control switch S1, double-control switch S2 and light bulb EL are all arranged on the surface of an operation panel (1) located at a corner of the top of the assessment equipment body (3); the operation panel (1) and the main switch (5) are respectively located on both sides of the top of the assessment equipment body (3).

5. A low voltage electrician assessment system as claimed in claim 3, characterized in that: The two-phase switch QS, leakage protection, fluorescent lamp 1, fluorescent lamp 2, single-control switch S3 and ballast constitute a simulated single-control fluorescent lamp wiring system; The fluorescent lamp 1, the fluorescent lamp 2, the single-control switch S3 and the ballast are all arranged on the surface of the operation panel (1) at the top center of the assessment equipment body (3), and the operation panel (1) is located on the top of the assessment equipment host (2).

6. A low voltage electrician assessment system as claimed in claim 3, characterized in that: The two-phase switch QS, leakage protection, air switches QF1, QF2, socket 1 and socket 2 constitute an analog sub-control socket wiring system; The air switches QF1, QF2, socket 1 and socket 2 are all arranged on the surface of an operation panel (1) on one side of the middle of the assessment equipment body (3); the operation panel (1) is located on one side of the assessment equipment host (2), and the main switch (5) is located on both sides of the assessment equipment body (3).

7. A low-voltage electrician assessment system, comprising a three-phase motor wiring assessment system, wherein the three-phase motor wiring assessment system is arranged in any one of the low-voltage electrician assessment equipment in claims 1 to 2, characterized in that: The three-phase motor wiring assessment system includes a three-phase switch QS, a fuse FU, an AC contactor KM, a thermal relay FR, a forward button SB1, a reverse button SB2, a stop button SB3 and a motor M; Among them, after the three-phase switch QS, fuse FU, AC contactor KM, thermal relay FR, forward button SB1, reverse button SB2, stop button SB3 and motor M are connected in sequence, there are three states: three-phase motor inching circuit wiring, three-phase motor self-locking circuit wiring and three-phase motor contactor interlocking forward and reverse circuit wiring.

8. A low voltage electrician assessment system as claimed in claim 7, characterized in that: The motor M is provided with a forward and reverse indicator light.

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