CN216748038U - A school examines device for motor three-phase wiring - Google Patents
A school examines device for motor three-phase wiring Download PDFInfo
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- CN216748038U CN216748038U CN202122978749.1U CN202122978749U CN216748038U CN 216748038 U CN216748038 U CN 216748038U CN 202122978749 U CN202122978749 U CN 202122978749U CN 216748038 U CN216748038 U CN 216748038U
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Abstract
The utility model discloses a school inspection device for motor three-phase wiring, including three-phase power module, overload protection module and detection pilot lamp group module one, three-phase power module is used for producing low pressure three-phase alternating current, and the motor U, V, W looks three terminal of treating the school inspection provides power input, the input of overload protection module is established ties with three-phase power module's output, and overload protection module's output is established ties with the tail end of motor switch-on wire U, V, W respectively, overload protection module is used for protecting three-phase power module; the utility model discloses in bright or not bright through observing three pilot lamp, and then check the correctness of the wiring of motor switch-on wire U, V, W looks fast, motor three-phase wiring school is examined and is need not to demolish relevant wiring, and the operation is not only convenient, and the school is examined accurately moreover, has saved the time cost, has improved efficiency.
Description
Technical Field
The utility model belongs to the motor control field especially relates to a school examines device for motor three-phase wiring.
Background
With the increasing use of electrical equipment, large three-phase motors, three-phase generators and three-phase transformers are also becoming more and more popular. During installation, each U, V, W three-phase of the devices needs to be connected with a plurality of wires simultaneously, and when the phase sequence of the plurality of wires connected with the input end of the power supply and the other end of the wire connected with the motor is not completely consistent with the power supply, the power supply is short-circuited, and the devices are burnt.
Because the external wiring harnesses of the U, V, W phase terminals of the three-phase motor are more, when the wires connected with the U, V, W phase of the three-phase motor are electrified for use, the external wiring harnesses connected with the three-phase motor terminals are mostly identical in appearance, so that the wiring correctness of workers is difficult to judge from the appearance of the wiring harnesses, and the judgment is easy to make mistakes; at present, the correctness and the mistake of wiring are usually checked through wire disconnecting, wire aligning, tie-back, torque force applying again and torque force reporting and checking again, but a large amount of time and manpower are wasted due to the fact that the relevant wiring is completely disconnected and then is tied back again, the production progress is greatly influenced, time and labor are wasted, and the correctness cannot be guaranteed when the three-phase wiring of the motor is re-assembled.
Disclosure of Invention
The utility model aims to provide a: the utility model provides a school examines device for motor three-phase wiring, aims at solving the problem that mentions in the above-mentioned background art.
The utility model adopts the technical scheme as follows:
a calibration device for three-phase wiring of a motor comprises a three-phase power module, an overload protection module and a detection indicator lamp set module I;
the three-phase power supply module is used for generating low-voltage three-phase alternating current and providing power supply input for U, V, W phase three terminals of the motor to be checked;
the input end of the overload protection module is connected with the output end of the three-phase power supply module in series, the output end of the overload protection module is connected with the tail end of a motor switch-on lead U, V, W in series, and the overload protection module is used for protecting the three-phase power supply module;
the first detection indicator lamp set module comprises three indicator lamps, the indicator lamps are connected in a three-phase triangular wiring mode, input ends U2, V2 and W2 of the three indicator lamps are connected in parallel with the output end of the overload protection module correspondingly, and the three indicator lamps are observed to be turned on or turned off to judge whether a motor three-phase wiring has a series-phase short circuit or not.
Preferably, the three-phase power module includes a U-phase detection circuit L1, a V-phase detection circuit L2, and a W-phase detection circuit L3, the U-phase detection circuit L1, the V-phase detection circuit L2, and the W-phase detection circuit L3 are all electrically connected to an ac transformer TC, the ac transformer TC reduces the high-voltage ac power of the U-phase detection circuit L1, the V-phase detection circuit L2, and the W-phase detection circuit L3 to low-voltage ac power, and the U-phase detection circuit L1, the V-phase detection circuit L2, and the W-phase detection circuit L3 are respectively connected in series to a three-phase power switch QF with leakage protection.
Preferably, the overload protection module comprises a thermal overload relay FR and three alternating-current contactors KM, output ends of the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3 are electrically connected to normally open contact input ends of the three alternating-current contactors KM correspondingly, normally open contact output ends of the three alternating-current contactors KM are electrically connected to coils of the thermal overload relay FR respectively, the other end of the coil of the thermal overload relay FR is connected to three leads U1, V1 and W1 correspondingly, and one ends of the three leads U1, V1 and W1, which are far away from the coil of the thermal overload relay FR, are electrically connected to a tail end of the motor connection lead U, V, W; the input ends U2, V2 and W2 of the three indicator lamps are connected with three wires U1, V1 and W1 in parallel.
Preferably, the output end of the W-phase detection circuit L3 is connected in series with the coil of the ac contactor KM, the start switch SB2, the stop switch SB1, and the contact of the thermal relay FR in sequence, the output end of the contact of the thermal relay FR is connected in series with the U-phase detection circuit L1, and the two ends of the start switch SB2 are also connected in parallel with one normally open contact of the ac contactor KM.
Preferably, the head end of the motor connecting wire U, V, W is electrically connected with a second detection indicator light set module, the second detection indicator light set module comprises three indicator lights, the three indicator lights are connected in a three-phase triangular connection mode, and input ends U3, V3 and W3 of the three indicator lights are connected in parallel with the head end of the motor connecting wire U, V, W.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
firstly, in the utility model, can reduce high-voltage alternating current to low-voltage alternating current through three-phase power module, low-voltage alternating current exports low-voltage current to motor switch-on wire U, V, W's tail end through overload protection module again, with the tail end looks electric connection of motor switch-on wire U, V, W, three the pilot lamp connects through three-phase triangle-shaped wiring mode, and input U2, V2, W2 of three pilot lamp are connected with overload protection module's output parallel, and when the pilot lamp that connects in parallel between arbitrary two looks in motor switch-on wire U, V, W lighted, the normal circulation of electric current, then proves that these two take place to connect the wiring correctly; when the motor is connected with the indicator lights which are connected in parallel between any two phases in the lead U, V, W and are not on, the current can not flow normally, the two phases are proved to have a series-phase short circuit, at the moment, the overload protection module can quickly cut off the connection with the three-phase power supply module, and then the overload protection module can protect the components in the circuit; the three indicator lamps are observed to be bright or not to be bright, so that the correctness of the connection of the motor connecting lead U, V, W phase is quickly checked, the related connection is not required to be detached in the three-phase connection check of the motor, the operation is not only convenient, but also the check is accurate, the time cost is saved, and the efficiency is improved.
Two, the utility model discloses in, the utility model discloses whole volume is less, and the portable is easy to be kept, can one-man operation accomplish during the operation, also can double cooperation operation, and whole convenient to use.
Drawings
Fig. 1 is a schematic diagram of a module structure of the present invention;
FIG. 2 is a circuit diagram of the present invention;
fig. 3 is a circuit diagram of a first detection indicating lamp set module according to the present invention;
fig. 4 is a circuit diagram of the second middle detection indicating lamp set module of the present invention.
The labels in the figure are: 1. a three-phase power supply module; 2. an overload protection module; 3. a first detection indicator lamp set module; 4. a second detection indicator lamp set module; 5. the motor turns on conductor U, V, W.
Detailed Description
Referring to fig. 1-3, a checking device for three-phase wiring of a motor comprises a three-phase power module 1, an overload protection module 2 and a detection indicator lamp set module I3;
the main power supply of the three-phase power supply module 1 is AC380V, the three-phase power supply module 1 is used for generating low-voltage three-phase alternating current, and provides power supply input for three terminals of U, V, W phases of the motor to be checked, and the motor to be checked can be: three-phase motors, three-phase generators, or three-phase transformers;
three-phase power module 1 includes U looks detection circuitry L1, V looks detection circuitry L2 and W looks detection circuitry L3, and U looks detection circuitry L1, V looks detection circuitry L2 and W looks detection circuitry L3 all electric connection have ac transformer TC, and ac transformer TC's model is: the SBK150VA three-phase isolation transformer, the AC transformer TC inputs AC380V and outputs AC24V, furthermore, the AC transformer TC reduces the high-voltage alternating current of the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3 into low-voltage alternating current, and 380V three-phase power switch QF with leakage protection is respectively connected in series on the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3;
the input end of the overload protection module 2 is connected with the output end of the three-phase power supply module 1 in series, the output end of the overload protection module 2 is connected with the tail end of the motor switch-on lead U, V, W5 in series, and the overload protection module 2 is used for protecting the three-phase power supply module 1;
the overload protection module 2 comprises a thermal overload relay FR and three alternating current contactors KM, wherein the model of the thermal overload relay FR is LRD02 Ie 0.6-1.5A, the output ends of a U-phase detection circuit L1, a V-phase detection circuit L2 and a W-phase detection circuit L3 are electrically connected with the normally open contact input ends of the three alternating current contactors KM correspondingly, the normally open contact output ends of the three alternating current contactors KM are respectively and electrically connected with a coil of the thermal overload relay FR, and the other end of the coil of the thermal overload relay FR is correspondingly connected with three leads U1, V1 and W1;
the first detection indicator light group module 3 comprises three indicator lights, the three indicator lights are connected in a three-phase triangular connection mode (as shown in fig. 3), input ends U2, V2 and W2 of the three indicator lights are correspondingly connected in parallel with an output end of the overload protection module 2, and one ends of three leads U1, V1 and W1, which are far away from a coil of the thermal overload relay FR, are electrically connected with a tail end phase of a motor switch-on lead U, V, W5;
the colors of the three indicator lights are respectively: the three-phase motor three-phase connection type three-phase motor three-phase indicating lamp comprises a yellow indicating lamp, a green indicating lamp and a red indicating lamp, wherein the yellow indicating lamp, the green indicating lamp and the red indicating lamp are connected with one another in a three-phase triangular connection mode, input ends U2, V2 and W2 of the three indicating lamps are connected with three leads U1, V1 and W1 in parallel, the yellow indicating lamp is connected between leads U1 and V1 in parallel, the green indicating lamp is connected between leads V1 and W1 in parallel, the red indicating lamp is connected between W1 and U1 in parallel, and when the three leads U1, V1 and W1 are electrically connected with the tail end phase of a motor connection lead U, V, W5, the three indicating lamps are observed to be turned on or turned off to judge whether the three-phase connection of the motor is in a series-phase short circuit;
the output end of the W-phase detection circuit L3 is sequentially connected in series with a coil of an alternating current contactor KM, a starting switch SB2, a stopping switch SB1 and contacts of a thermal relay FR, the output end of the contacts of the thermal relay FR is connected in series with the U-phase detection circuit L1, and the two ends of the starting switch SB2 are also connected in parallel with a normally open contact of the alternating current contactor KM; the device can be turned on by the start switch SB2, and the device can be turned off by the stop switch SB 1;
specifically, when AC24V alternating current output by the AC transformer TC flows to input ends U2, V2 and W2 of three indicator lamps, a yellow indicator lamp is connected between conductors U589 and V1 in parallel, a green indicator lamp is connected between conductors V1 and W1 in parallel, and a red indicator lamp is connected between W1 and U1 in parallel, by inputting AC380V to input ends of a U1, a V2 and a W3, and outputting high-voltage alternating current AC380V as AC24V through the AC transformer TC, and then passing through a thermal overload relay FR and three conductors U1, V1 and W1, and connecting three conductors U1, V1 and W1 to tail ends of a motor on conductor U, V, W5 phase, respectively, and connecting input ends U2, V2 and W2 of the three indicator lamps in parallel with three conductors U1, V1 and W1 in parallel, and connecting AC24V alternating current output by the AC transformer TC to input ends U2, V2 and W2 of the three indicator lamps in parallel, because the yellow indicator lamps are connected between conductors U1 and V1 in parallel, and the green indicator lamps are connected between conductors V1 and W1 in parallel;
pressing start switch SB 2:
when the yellow indicator light, the green indicator light and the red indicator light are all on, the condition that serial phase connection or wrong short circuit of connection does not occur between the motor connecting lead U, V, W5 is proved, and further the condition that the motor connecting lead U, V, W5 is correct in connection and short circuit does not occur is proved;
when all the yellow indicator light, the green indicator light and the red indicator light are not on, the condition that serial phase wiring or wiring error short circuit occurs between the motor connecting leads U, V, W5 is proved, and further the condition that the wiring of the motor connecting lead U, V, W5 is all wrong and the three phases of the motor connecting lead U, V, W5 are all short circuit is proved;
when only the yellow indicator light and the red indicator light are turned on and the green indicator light is not turned on among the yellow indicator light, the green indicator light and the red indicator light, the motor is connected with the V phase and the W phase in the lead U, V, W5 to be in short circuit;
when only the yellow indicator lamp and the green indicator lamp are turned on and the red indicator lamp is not turned on among the yellow indicator lamp, the green indicator lamp and the red indicator lamp, the W phase and the U phase in the motor connecting lead U, V, W5 are short-circuited;
when only the green indicator lamp and the red indicator lamp of the yellow indicator lamp, the green indicator lamp and the red indicator lamp are on and the yellow indicator lamp is not on, the motor is short-circuited with the U phase and the V phase in the lead U, V, W5;
when a short circuit occurs in a motor switch-on lead U, V, W5 in the detection process, a short circuit of three indicator lamp lines connected in a three-phase triangular connection mode can generate a large short circuit current, the short circuit current flows through a thermal overload relay FR, the thermal overload relay FR can perform overload action after 20 seconds of delay, three alternating current contactors KM corresponding to a connection phase are correspondingly cut off, and then power supply of the thermal overload relay FR is cut off, the equipment stops working, and the safety of the equipment and operators is protected; the correctness of the connection of the motor connecting lead U, V, W5 phase can be quickly checked only by observing whether the three indicator lamps are on or off, the related connection is not required to be removed in the three-phase connection check of the motor, the operation is convenient, the check is accurate, the condition that the wiring correctness of a worker is difficult to judge from the appearance of the wiring harness due to the fact that the external wiring harness of the current three-phase motor U, V, W phase terminal is more and most of the external wiring harnesses are the same is avoided, and meanwhile, the wiring correctness is judged by re-connecting the wiring harness after the related connection is completely disconnected, so that the time cost is saved, and the efficiency is improved;
further, the head end of the motor connecting wire U, V, W5 is electrically connected with a second detection indicator light set module, the second detection indicator light set module comprises three indicator lights, the three indicator lights are connected in a three-phase triangular connection mode, and input ends U3, V3 and W3 of the three indicator lights are connected in parallel with the head end of the motor connecting wire U, V, W5 (namely a three-phase motor connecting terminal U, V, W); the colors of the three indicator lights are respectively: a yellow indicator light, a green indicator light, and a red indicator light, wherein the yellow indicator light is connected in parallel between the U and V head ends (i.e., on the three-phase motor terminals U and V) in the motor connecting wire U, V, W5, the green indicator light is connected in parallel between the V and W head ends (i.e., on the three-phase motor terminals V and W) in the motor connecting wire U, V, W5, and the red indicator light is connected in parallel between the W and U head ends (i.e., on the three-phase motor terminals W and U) in the motor connecting wire U, V, W5;
specifically, the checking device for the three-phase connection of the motor needs to distinguish whether the connection between the motor connecting lead U, V, W5 and the three-phase motor connecting terminal U, V, W is in the same phase;
pressing start switch SB 2:
when the U phase and the V phase in the lead U, V, W5 are switched on by a person in a short circuit mode, when the indicator lamp in the first detection indicator lamp group module 3 is the same as the indicator lamp in the second detection indicator lamp group module and only the green indicator lamp and the red indicator lamp are turned on, the W phase in the motor switch-on lead U, V, W5 is correctly connected with the W phase of the three-phase motor connecting terminal;
when the U phase and the W phase in the lead U, V, W5 are switched on by a person in a short circuit mode, when the indicator lamp in the first detection indicator lamp group module 3 is the same as the indicator lamp which is turned on in the second detection indicator lamp group module and only the yellow indicator lamp and the green indicator lamp are turned on, the fact that the V phase in the motor switch-on lead U, V, W5 is correctly connected with the V phase of the three-phase motor connecting terminal is shown;
when the motor is artificially short-circuited to connect the V phase and the W phase in the lead U, V, W5, when the indicator lamp in the first detection indicator lamp group module 3 is the same as the indicator lamp turned on in the second detection indicator lamp group module and only the yellow indicator lamp and the red indicator lamp are turned on, the U phase in the motor connection lead U, V, W5 is correctly connected with the U phase of the three-phase motor connection terminal;
the device can be applied to equipment such as a three-phase motor, a three-phase generator, a three-phase transformer and the like, the correctness of the connection of the motor connecting wire U, V, W5 phase can be quickly checked only by observing whether the three indicator lamps are on or off, the related connection is not required to be removed in the three-phase connection check of the motor, the operation is convenient, the check is accurate, the time cost is saved, and the efficiency is improved; just the utility model discloses whole volume is less, and the portable of being convenient for is easily kept, can one-man operation accomplish during the operation, also can double cooperation operation, and whole convenient to use.
Claims (5)
1. A correction and detection device for three-phase wiring of a motor is characterized by comprising a three-phase power supply module, an overload protection module and a detection indicator lamp set module I;
the three-phase power supply module is used for generating low-voltage three-phase alternating current and providing power supply input for U, V, W phase three terminals of the motor to be checked;
the input end of the overload protection module is connected with the output end of the three-phase power supply module in series, the output end of the overload protection module is connected with the tail end of a motor switch-on lead U, V, W in series, and the overload protection module is used for protecting the three-phase power supply module;
the first detection indicator lamp set module comprises three indicator lamps, the indicator lamps are connected in a three-phase triangular wiring mode, input ends U2, V2 and W2 of the three indicator lamps are connected in parallel with the output end of the overload protection module correspondingly, and the three indicator lamps are observed to be turned on or turned off to judge whether a motor three-phase wiring has a series-phase short circuit or not.
2. The checking device for the three-phase connection of the motor according to claim 1, wherein the three-phase power module comprises a U-phase detection circuit L1, a V-phase detection circuit L2 and a W-phase detection circuit L3, the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3 are all electrically connected with an alternating current transformer TC, the alternating current transformer TC reduces high-voltage alternating current of the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3 into low-voltage alternating current, and three-phase power switches QF with leakage protection are respectively connected in series to the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3.
3. The calibration device for three-phase connection of the motor according to claim 2, wherein the overload protection module comprises a thermal overload relay FR and three ac contactors KM, output ends of the U-phase detection circuit L1, the V-phase detection circuit L2 and the W-phase detection circuit L3 are electrically connected to normally open contact input ends of the three ac contactors KM respectively, normally open contact output ends of the three ac contactors KM are electrically connected to coils of the thermal overload relay FR respectively, the other ends of the coils of the thermal overload relay FR are connected to three leads U1, V1 and W1 respectively, and ends of the three leads U1, V1 and W1, which are far away from the coils of the thermal overload relay FR, are electrically connected to a tail end phase of the motor connecting lead U, V, W; the input ends U2, V2 and W2 of the three indicator lamps are connected with three wires U1, V1 and W1 in parallel.
4. A calibration arrangement for three-phase connection of electric motors according to claim 1, characterized in that the output terminal of said W-phase detection circuit L3 is serially connected with the coil of ac contactor KM, the start switch SB2, the stop switch SB1 and the contact of the thermal relay FR, the output terminal of the contact of the thermal relay FR is serially connected with the U-phase detection circuit L1, and a normally open contact of ac contactor KM is also connected in parallel with the two terminals of the start switch SB 2.
5. The device as claimed in claim 3, wherein a second detection light set module is electrically connected to the head end of the motor connection wire U, V, W, the second detection light set module includes three indication lights, the three indication lights are connected in a three-phase delta connection manner, and input ends of the three indication lights are connected in parallel to the head end of the motor connection wire U, V, W through U3, V3 and W3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978749.1U CN216748038U (en) | 2021-11-30 | 2021-11-30 | A school examines device for motor three-phase wiring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978749.1U CN216748038U (en) | 2021-11-30 | 2021-11-30 | A school examines device for motor three-phase wiring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216748038U true CN216748038U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122978749.1U Active CN216748038U (en) | 2021-11-30 | 2021-11-30 | A school examines device for motor three-phase wiring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216748038U (en) |
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2021
- 2021-11-30 CN CN202122978749.1U patent/CN216748038U/en active Active
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