CN202159397U - Anti-theft monitoring device for power cable of electric motor - Google Patents
Anti-theft monitoring device for power cable of electric motor Download PDFInfo
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- CN202159397U CN202159397U CN2011202265206U CN201120226520U CN202159397U CN 202159397 U CN202159397 U CN 202159397U CN 2011202265206 U CN2011202265206 U CN 2011202265206U CN 201120226520 U CN201120226520 U CN 201120226520U CN 202159397 U CN202159397 U CN 202159397U
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Abstract
The utility model discloses an anti-theft monitoring device for a power cable of an electric motor. A power supply circuit is connected with two phase circuits of a triphase AC power supply, and the connection positions are at the lower part of a power switch of the triphase AC power supply and the upper part of a motor control contactor; a stopping current monitoring circuit is connected with the power supply circuit and monitored circuits of lower contact points of the motor control contactor, so as to acquire the loop current from the loop of the monitored circuits when the monitoring circuit stops; a running current monitoring circuit is connected with a current transformer on the circuit of the triphase AC power supply and used for acquiring the circuit current of the electric motor in a running state from the current transformer; the stopping current monitoring circuit and the running current monitoring circuit are accessed into a state and current comparison operation circuit used for judging the circuit running state and whether the circuit cable is stolen and cut or cut; an alarm signal output circuit is connected with the state and current comparison operation circuit,; and a monitored state display circuit is connected with a stopping state and current computing circuit, a running state and current computing circuit and an alarm signal output circuit at the same time.
Description
Technical field
The utility model relates to the motor power cable theft-prevention and cuts monitoring device.
Background technology
Generally there are a lot of manufacturing machines in large enterprise; Particularly also have a lot of outdoor manufacturing machines; For manufacturing machine provides the motor power cable of power because its line is directly thick, copper content is many, along with the rising of copper valency, this part cable becomes minority lawless person's pilferage target recently.For providing the motor power cable of power, manufacturing machine in a single day is cut, with having a strong impact on normally carrying out of enterprise production.Particularly some the time equipment motor cable the stopping time opened be cut; If can not in time find to take measures; When production technology needs this part equipment operation by the time and timely starting operation, gently then causing stops production influences enterprises production efficiency, heavy then will cause serious accident.Owing to do not have good appropriate technology to prevent originally and reported to the police, cause lawless person's pilferage behavior to repeatedly succeed, the steal phenomenon of this part cable is spread day by day, the ordinary production of enterprise is caused serious threat.
Prior electric mechanomotive force cable theft-prevention technology has: Chinese patent CN01239511.0 discloses a kind of cable theft-prevention clamp; Chinese patent CN200820217365.X discloses a kind of distribution transforming and has stolen discriminating sensor; Above-mentioned two patented technology major defects are to transform field apparatus, and its workload is big, and field apparatus dispersion alarm set point line attachment is long, and performance difficulty is difficult to popularize and uses.Chinese patent CN200920035361.4 discloses the electric power facilities anti-theft alarm terminal; Need to adopt special signal to take place and receiving device; Its complex structure; The Installation and Debugging difficulty is particularly used many mutual UNICOMs of warning device detection signal in the multiloop connected system, be difficult to correctly distinguish that which bar loop cable has taken place cut off fault.
Prior art is difficult to also that for the motor power cable situation that is cut suitable warning means are arranged; So current main way that still adopts artificial inspection; Artificial inspection for large-scale inspection except take a lot of work, time-consuming and untimely; Mainly be that the probability just in time found when being cut of cable is extremely low, make lawless person's pilferage behavior go smoothly again and again, encouraged lawless person's pilferage bluster.
Summary of the invention
The purpose of the utility model is to provide a kind of motor power cable theft-prevention to cut monitoring device; This monitoring device can make no matter the motor power cable is in service at cable energising motor; Still cable no power motor be in out of service in; As long as be cut and send alerting signal immediately, help in time organizing the relevant personnel to arrive the cable scene that is cut once the motor power cable takes place.
To achieve these goals, the utility model adopts following technical scheme:
A kind of motor power cable theft-prevention cuts monitoring device, comprises power circuit, shuts down current monitoring circuit, running current observation circuit, state and current ratio than computing circuit, alerting signal output circuit and monitoring state display circuit;
Said power circuit is made up of monitoring device working power and monitoring shutdown power supply two parts; Power circuit is connected on the two-phase circuit of three-phase alternating-current supply, and said link position is positioned at the power switch bottom of three-phase alternating-current supply, the top of electric motor control contactor;
Said shutdown current monitoring circuit connects the monitored circuit of contact under monitoring shutdown power supply and the electric motor control contactor, the loop current when obtaining the Monitoring Line shutdown from monitored line loop;
Said running current observation circuit connects the current transformer on the three-phase ac power cord road, the line current during from the operation of current transformer acquisition motor;
Said shutdown current monitoring circuit and running current observation circuit insert said state and current ratio than computing circuit; State and current ratio are made up of stopped status and current operator circuit and running status and current operator circuit than computing circuit; State and current ratio are than the current values of computing circuit according to shutdown current monitoring circuit and running current observation circuit, the judgement of carrying out the circuit running status and having or not line cord to be cut off by pilferage;
Said alerting signal output circuit connects state and current ratio than computing circuit, than the signal of computing circuit output, sends the alerting signal that line cord is cut off by pilferage according to state and current ratio;
Said monitoring state display circuit connects stopped status and current operator circuit, running status and current operator circuit and alerting signal output circuit simultaneously, and circuit is in stopped status, running status or cable and is cut off state by pilferage respectively.
The monitoring device of the utility model provides a path monitoring electric current I a through monitoring device under power cable no power motor halted state, carry out the whether normal monitoring of circuit; Under power cable energising motoring, utilize circuit motor operating current Ib to obtain secondary current Ic and insert monitoring device through current transformer, carry out the whether normal monitoring of circuit.As long as be cut and send alerting signal immediately, help in time organizing the relevant personnel to arrive the cable scene that is cut once the motor power cable takes place.If the power cable line maintenance, then power switch must be disconnected, and this moment, the working power of monitoring device was cut off, and monitoring device is not worked, so the monitoring device of the utility model can not send false alarm because of circuit outage maintenance.
The motor power cable theft-prevention of the utility model cuts monitoring device and need not erecting equipment at the scene; As long as at the cable power output end; The monitoring device of the utility model just is installed in electric panel room, just can be reached the purpose that cable line is monitored through the monitoring in electric panel room.The monitoring device of the utility model is simple in structure, need not extra power supply and complicated mechanism, as long as the simple monitoring device that inserts the utility model can carry out monitoring and the warning that cable is cut on the circuit of needs monitoring.
Description of drawings
Fig. 1 cuts monitoring device control principle synoptic diagram (monitoring state when motor is shut down) for the utility model motor power cable theft-prevention;
Fig. 2 is the monitoring device control principle figure (monitoring state during the motor operation) of the utility model;
Fig. 3 cuts the monitoring device electrical diagram for the utility model motor power cable theft-prevention;
Fig. 4 is the monitoring device working power circuit;
Fig. 5 is for shutting down current monitoring circuit;
Fig. 6 is the running current observation circuit;
Fig. 7 is that stopped status and current ratio are than computing circuit;
Fig. 8 is that running status and current ratio are than computing circuit;
Fig. 9 is the alerting signal output circuit;
Figure 10 is the monitoring state display circuit.
Among the figure: 1 power circuit (working power); 2 shut down current monitoring circuit (monitoring shutdown), 3 running current observation circuits (operational monitoring), and 4 states and current ratio are than computing circuit (s operation control, signal comparison operation circuit); 41 stopped statuss and current ratio are than computing circuit; 42 running statuses and current ratio be than computing circuit, 5 alerting signal output circuits (output of reporting to the police), 6 monitoring state display circuits.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.
Referring to Fig. 3, a kind of motor power cable theft-prevention cuts monitoring device, comprises power circuit 1, shuts down current monitoring circuit 2, running current observation circuit 3, state and current ratio than computing circuit 4, alerting signal output circuit 5 and monitoring state display circuit 6.
Said power circuit 1 is made up of monitoring device working power and monitoring shutdown power supply two parts; Power circuit 1 is connected to two-phase circuit a, b 2 points of three-phase alternating-current supply; For said monitoring device provides working power, said link position a, 2 of b are positioned at the power switch bottom of three-phase alternating-current supply, the top of electric motor control contactor;
Said power circuit 1 mainly is made up of main fuse FU, power transformer BT, transistor fairing ZL1, filter capacitor C1, C2, three-terminal voltage-stabilizing pipe VW1; Circuit function is: insert output voltage behind power transformer BT, transistor fairing ZL1, filter capacitor C1, C2 and three-terminal voltage-stabilizing pipe VW1 by A1, A2 end (a, b point) two-phase alternating current power supply 380V, offer the monitoring device working power; Referring to Fig. 4.
Contact c, the monitored circuit of d point under the monitoring shutdown power supply of said shutdown current monitoring circuit 2 connection power circuits 1 and the electric motor control contactor, the loop current when obtaining the Monitoring Line shutdown from monitored line loop; Said shutdown current monitoring circuit 2 mainly is made up of current-limiting resistance R1, R2, transistor fairing ZL2, photoelectrical coupler current-limiting resistance R4, RC filtering R3, C3 and photocoupler GL1; Circuit function is: upper contact a, b point (A1, A2 end) two-phase alternating current power supply 380V by contactor insert, and the monitoring power supply after current-limiting resistance R1 current limliting outputs to following contact c, the d point (B1, B2 end) of contactor; Exchange monitoring current behind current-limiting resistance R2, ZL2 is transformed to direct current through the transistor fairing, triggers photocoupler GL1 after the RC filtering again, makes photocoupler GL1 conducting, output low level to stopped status and current ratio than computing circuit 41; Referring to Fig. 5.
The current transformer CT that said running current observation circuit 3 connects on the three-phase ac power cord road, the line current during from the operation of current transformer CT acquisition motor; Said running current observation circuit 3 mainly is made up of internal current mutual inductor CT, transistor fairing ZL2 and RC filtering C4, R5; Circuit function: the slave unit secondary loop of mutual inductor inserts (H3, H4 end); Motor exchanges monitoring current and is transformed to direct current through internal current mutual inductor CT and transistor fairing ZL2, and the output high level arrives running status and current ratio than computing circuit 42 after RC filtering C4, R5 filtering again; Referring to Fig. 6.
Said shutdown current monitoring circuit 2 and the running current observation circuit 3 said states of access and current ratio are than computing circuit 4; State and current ratio are than the current values of computing circuit 4 according to shutdown current monitoring circuit 2 and running current observation circuit 3, the judgement of carrying out the circuit running status and having or not line cord to be cut off by pilferage; Said state and current ratio mainly are made up of with running status and current operator circuit 42 stopped status and current operator circuit 41 than computing circuit 4; Said stopped status and current operator circuit 41 are formed by shutting down hang oneself resistance R 6, operational amplifier F1, F2, transport and placing device F1 benchmark R7, R9, transport and placing device F2 benchmark R21, R10 and input resistance R8 of current monitoring circuit 2 photocoupler power supplys; Circuit function: signal is by shutting down current monitoring circuit 2 inputs after two operational amplifier F1, F2 relatively export signal respectively, output in the same way; Input low level, output low level.Cable line just often, from shutting down current monitoring circuit 2 input low levels, this circuit output low level is to monitoring state display circuit 6, alerting signal output circuit 5; Referring to Fig. 7.
Said running status and current operator circuit 42 mainly are made up of input resistance R12, operational amplifier F3, F4, transport and placing device F3 benchmark R11, R13, coupling input resistance R14 and transport and placing device F4 benchmark R15, R16; Circuit function: after two operational amplifier F3, F4 relatively export, operational amplifier F3 oppositely exports signal, operational amplifier F3 input high level, output low level by 3 inputs of running current observation circuit.Operational amplifier F4 exports in the same way, F4 input low level, output low level.Cable line just often, from running current observation circuit 3 input high levels, this circuit output low level is to monitoring state display circuit 6, alerting signal output circuit 5; Referring to Fig. 8.
Said alerting signal output circuit 5 connects state and current ratio than computing circuit 4, than the signal of computing circuit 4 outputs, sends the alerting signal that line cord is cut off by pilferage according to state and current ratio; Said alerting signal output circuit 5 mainly is made up of NPN transistor BT1, base stage working ressitance R17 and signal relay coil J; Circuit function: this alerting signal output circuit 5 is an on-off circuit, the output of alerting signal power, and the alarm condition signal outputs to monitoring state display circuit 6.State and current ratio are than computing circuit 4 input low levels, and NPN transistor BT1 is by turn-offing, and relay J discharges, and the output signal is to monitoring state display circuit 6 output high level.Cable line just often, than computing circuit 4 input low levels, relay J discharges from state and current ratio, the output signal is to monitoring state display circuit 6 output high level, the disconnected cable status lamps of the emitting led pilot lamp LD3 in the monitoring state display circuit 6 extinguish; Referring to Fig. 9.
Said monitoring state display circuit 6 connects stopped status and current operator circuit 41, running status and current operator circuit 42 and alerting signal output circuit 5 simultaneously, and circuit is in stopped status, running status or cable and is cut off state by pilferage respectively; Said monitoring state display circuit 6 is made up of emitting led pilot lamp LD1, LD2, LD3, LED current-limiting resistance R18, R19, R20; Circuit function: line status shows.LD1 lights, and equipment does not move, and circuit is normal.LD2 lights, equipment operation, and circuit is normal.LD3 lights, and circuit is cut off.The LED negative terminal inserts signal, and low level LED lights, and high level LED extinguishes; Referring to Figure 10.
The course of work that a kind of motor power cable theft-prevention of the utility model cuts monitoring device is, referring to Fig. 1, Fig. 2, Fig. 3.
Under motor power cable no power motor halted state, monitoring current Ia carries out the whether normal monitoring of circuit when utilizing said monitoring device to provide a circuit to shut down;
Under power cable energising motoring, utilize three-phase supply circuit motor operating current Ib to obtain secondary running current Ic and insert said monitoring device through current transformer, carry out the whether normal monitoring of circuit;
Under the normal condition, the motor power cable line has only two states, that is: the running status of switching on or outage halted state, and said monitoring device can monitor shuts down electric current I a or running current Ic; Do not shut down electric current I a or running current Ic if said monitoring device all monitors, represent that then the motor power cable is cut off, said monitoring device can send alerting signal immediately.
1, under motor power cable no power motor halted state; In the time of need overhauling except that logicalnot circuit; Three-phase power switch is in closure state all the time under the normal condition; The power circuit 1 of said monitoring device is connected to two-phase circuit a, b 2 points of three-phase alternating-current supply, and for monitoring device provides working power, monitoring device is initially located in the monitoring state; Said link position a, 2 of b are positioned at the power switch bottom of three-phase alternating-current supply, the top of electric motor control contactor, referring to Fig. 1.
This moment since motor do not work, be in out of service in, the contactor contact of three-phase supply circuit is in off-state, the power cable service interruption.Monitoring shutdown electric current I a flows into the power circuit 1 of said monitoring device from contactor upper contact a point;, current limliting flows out to contact c point under the said contactor after handling (current-limiting circuit is placed in the power circuit 1); Get into cold power cable circuit; Monitoring current Ia flow into an end of motor winding circuit through a heart yearn (phase line) of power cable; Through flow out to another root heart yearn (another root phase line) of power cable behind the motor winding circuit from the other end; Monitoring current Ia this root heart yearn of flowing through turns back to contact d point under this phase contact, flows into the shutdown current monitoring circuit 2 of said monitoring device from the d point, after treatment circuit in the dynamo-electric stream of the stop over observation circuit 2 and current limliting are handled; Monitoring current Ia flows out to the other end of power circuit 1 from shutting down current monitoring circuit 2, flows out to this phase contact upper contact b point again and constitutes shutdown current monitoring loop;
Said monitoring device shutdown this moment current monitoring circuit 2 continues to have a small monitoring current Ia to pass through; Shut down the current monitoring circuit 2 monitoring current signal that this is small and send into state and current ratio than computing circuit 4; State and current ratio compare computing than computing circuit 4 with signal amplitude that receives and motor shutdown reference value, obtain cable line and judge normally; Monitoring state display circuit 6 obtains shutting down the output signal of current monitoring circuit 2, and circuit is in the orderly closedown state.
If the power cable circuit is cut off by pilferage; The loop of monitoring shutdown electric current I a is disconnected; The shutdown current monitoring circuit 2 of said monitoring device does not have monitoring current Ia to pass through; State and current ratio do not receive than computing circuit 4 and shut down the signal output of current monitoring circuit 2 greater than specified reference value signal amplitude; Also not greater than the signal output of specified reference value signal amplitude, state and current ratio obtain the judgement that cable line is cut off than computing circuit 4 to running current observation circuit 3 simultaneously, and state and current ratio are exported to alerting signal output circuit 5 than computing circuit 4 with judged result; Make the adhesive of warning output relay send alerting signal, and monitoring state display circuit 6 show the state that cable is cut off.
2, be in the running status at power cable energising motor; The power switch of three-phase supply circuit is in closure state all the time; The power circuit 1 of said monitoring device is connected to two-phase circuit a, b 2 points of three-phase alternating-current supply; For monitoring device provides working power, monitoring device is initially located in the monitoring state; Said link position a, 2 of b are positioned at the power switch bottom of three-phase alternating-current supply, the top of electric motor control contactor, referring to Fig. 2.
This moment, the contactor contact was in closure state, the contactor upper contact a of three-phase supply circuit, b point respectively with following contact c, d point short circuit, the monitoring circuit of former monitoring shutdown electric current I a is by short circuit, the shutdown current monitoring circuit 2 of monitoring device is monitored less than electric current.This moment, motor running current Ib flow through from the three-phase supply circuit; Obtain the running current observation circuit 3 that secondary running current Ic is sent to said monitoring device after being installed in the current transformer induction on the circuit; Running current observation circuit 3 is sent into state and current ratio than computing circuit 4 with this current signal; State and current ratio compare computing than computing circuit 4 with signal amplitude that receives and motor operation reference value, obtain cable line and judge normally; Monitoring state display circuit 6 obtains running current observation circuit 3 output signals, and circuit is in normal operating condition.
If the power cable circuit is cut off by pilferage; The loop of motor operating current Ib is disconnected; The running current observation circuit 3 of said monitoring device does not have monitoring current Ic to pass through; State and current ratio do not receive the signal output of running current observation circuit 3 greater than specified reference value signal amplitude than computing circuit 4; Shut down current monitoring circuit 2 simultaneously also not greater than the signal output of specified reference value signal amplitude, state and current ratio obtain the judgement that cable line is cut off than computing circuit 4, and state and current ratio are exported to alerting signal output circuit 5 than computing circuit 4 with judged result; Make the adhesive of warning output relay send alerting signal, and monitoring state display circuit 6 show the state that cable is cut off.
3, power cable line maintenance; The power switch of three-phase alternating current is disconnected; The described monitoring device power supply of losing the job is in off position; The warning of monitoring device output can not moved output alarm signal because of the power supply of losing the job yet, and not send the false alarm signal so can not overhaul because of the circuit outage yet.
More than be merely the preferred embodiment of the utility model; It is not the protection domain that is used to limit the utility model; Therefore, any modification of being done within all spirit and principles at the utility model, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. a motor power cable theft-prevention cuts monitoring device, it is characterized in that: comprise power circuit, shut down current monitoring circuit, running current observation circuit, state and current ratio than computing circuit, alerting signal output circuit and monitoring state display circuit;
Said power circuit is made up of monitoring device working power and monitoring shutdown power supply two parts; Power circuit is connected on the two-phase circuit of three-phase alternating-current supply, and said link position is positioned at the power switch bottom of three-phase alternating-current supply, the top of electric motor control contactor;
Said shutdown current monitoring circuit connects the monitored circuit of contact under monitoring shutdown power supply and the electric motor control contactor, the loop current when obtaining the Monitoring Line shutdown from monitored line loop;
Said running current observation circuit connects the current transformer on the three-phase ac power cord road, the line current during from the operation of current transformer acquisition motor;
Said shutdown current monitoring circuit and running current observation circuit insert said state and current ratio than computing circuit; State and current ratio are made up of stopped status and current operator circuit and running status and current operator circuit than computing circuit; State and current ratio are than the current values of computing circuit according to shutdown current monitoring circuit and running current observation circuit, the judgement of carrying out the circuit running status and having or not line cord to be cut off by pilferage;
Said alerting signal output circuit connects state and current ratio than computing circuit, than the signal of computing circuit output, sends the alerting signal that line cord is cut off by pilferage according to state and current ratio;
Said monitoring state display circuit connects stopped status and current operator circuit, running status and current operator circuit and alerting signal output circuit simultaneously, and circuit is in stopped status, running status or cable and is cut off state by pilferage respectively.
2. motor power cable theft-prevention according to claim 1 cuts monitoring device, it is characterized in that: said power circuit mainly is made up of power transformer BT, transistor fairing ZL1, filter capacitor C1, C2, three-terminal voltage-stabilizing pipe VW1; Two-phase alternating current power supply 380V inserts output voltage behind power transformer BT, transistor fairing ZL1, filter capacitor C1, C2 and three-terminal voltage-stabilizing pipe VW1, offers the monitoring device working power.
3. motor power cable theft-prevention according to claim 1 cuts monitoring device; It is characterized in that: said shutdown current monitoring circuit mainly is made up of current-limiting resistance R1, R2, transistor fairing ZL2, photoelectrical coupler current-limiting resistance R4, RC filtering R3, C3 and photocoupler GL1; Two-phase alternating current power supply 380V is after upper contact a, the b point of contactor insert, and the monitoring power supply after current-limiting resistance R1 current limliting outputs to following contact c, the d point of contactor; Exchange monitoring current behind current-limiting resistance R2, ZL2 is transformed to direct current through the transistor fairing, triggers photocoupler GL1 after the RC filtering again, makes photocoupler GL1 conducting, output low level to stopped status and current ratio than computing circuit.
4. motor power cable theft-prevention according to claim 1 cuts monitoring device; It is characterized in that: said running current observation circuit mainly is made up of internal current mutual inductor CT, transistor fairing ZL2 and RC filtering C4, R5; The motor that the slave unit secondary loop of mutual inductor inserts exchanges monitoring current and is transformed to direct current through internal current mutual inductor CT and transistor fairing ZL2, and the output high level arrives running status and current ratio than computing circuit after RC filtering C4, R5 filtering again.
5. motor power cable theft-prevention according to claim 1 cuts monitoring device, it is characterized in that: said stopped status and current operator circuit are mainly formed by shutting down hang oneself resistance R 6, operational amplifier F1, F2, transport and placing device F1 benchmark R7, R9, transport and placing device F2 benchmark R21, R10 and input resistance R8 of current monitoring circuit photocoupler power supply; Signal is by shutting down the current monitoring circuit input after two operational amplifier F1, F2 relatively export signal respectively, output in the same way; Input low level, output low level; Cable line just often, from shutting down the current monitoring circuit input low level, this circuit output low level is to monitoring state display circuit, alerting signal output circuit.
6. motor power cable theft-prevention according to claim 1 cuts monitoring device, it is characterized in that: said running status and current operator circuit mainly are made up of input resistance R12, operational amplifier F3, F4, transport and placing device F3 benchmark R11, R13, coupling input resistance R14 and transport and placing device F4 benchmark R15, R16; After two operational amplifier F3, F4 relatively export, operational amplifier F3 oppositely exports signal, operational amplifier F3 input high level, output low level by the input of running current observation circuit; Operational amplifier F4 exports in the same way, F4 input low level, output low level; Cable line just often, from running current observation circuit 3 input high levels, this circuit output low level is to monitoring state display circuit, alerting signal output circuit.
7. motor power cable theft-prevention according to claim 1 cuts monitoring device, it is characterized in that: said alerting signal output circuit mainly is made up of NPN transistor BT1, base stage working ressitance R17 and signal relay coil J; This alerting signal output circuit is an on-off circuit, the output of alerting signal power, and the alarm condition signal outputs to the monitoring state display circuit.
8. motor power cable theft-prevention according to claim 1 cuts monitoring device, it is characterized in that: said monitoring state display circuit is made up of emitting led pilot lamp LD1, LD2, LD3, LED current-limiting resistance R18, R19, R20; Circuit function: line status shows; LD1 lights, and equipment does not move, and circuit is normal; LD2 lights, equipment operation, and circuit is normal; LD3 lights, and circuit is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202265206U CN202159397U (en) | 2011-06-30 | 2011-06-30 | Anti-theft monitoring device for power cable of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202265206U CN202159397U (en) | 2011-06-30 | 2011-06-30 | Anti-theft monitoring device for power cable of electric motor |
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| Publication Number | Publication Date |
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| CN202159397U true CN202159397U (en) | 2012-03-07 |
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| CN2011202265206U Expired - Fee Related CN202159397U (en) | 2011-06-30 | 2011-06-30 | Anti-theft monitoring device for power cable of electric motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855723A (en) * | 2011-06-30 | 2013-01-02 | 宝山钢铁股份有限公司 | Device and method for monitoring stealing cutting prevention of power cables of motor |
| CN103810813A (en) * | 2014-03-11 | 2014-05-21 | 辽宁兴达电力设备有限公司 | Running state alarm for power transformer |
| CN103824415A (en) * | 2014-03-11 | 2014-05-28 | 辽宁兴达电力设备有限公司 | Power transformer with running state alarm |
| WO2015008196A2 (en) | 2013-07-16 | 2015-01-22 | Batista Oliveira Costa Leal Miguel | System for operating and monitoring power cables |
| CN104335258A (en) * | 2012-05-30 | 2015-02-04 | 施耐德电气美国股份有限公司 | Electric vehicle supply equipment cable detection |
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2011
- 2011-06-30 CN CN2011202265206U patent/CN202159397U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855723A (en) * | 2011-06-30 | 2013-01-02 | 宝山钢铁股份有限公司 | Device and method for monitoring stealing cutting prevention of power cables of motor |
| CN102855723B (en) * | 2011-06-30 | 2014-10-01 | 宝山钢铁股份有限公司 | Device and method for monitoring stealing cutting prevention of power cables of motor |
| CN104335258A (en) * | 2012-05-30 | 2015-02-04 | 施耐德电气美国股份有限公司 | Electric vehicle supply equipment cable detection |
| US9368008B2 (en) | 2012-05-30 | 2016-06-14 | Schneider Electric USA, Inc. | Electric vehicle supply equipment cable detection |
| CN104335258B (en) * | 2012-05-30 | 2016-12-21 | 施耐德电气美国股份有限公司 | Electric vehicle power supply equipment cable detects |
| WO2015008196A2 (en) | 2013-07-16 | 2015-01-22 | Batista Oliveira Costa Leal Miguel | System for operating and monitoring power cables |
| CN103810813A (en) * | 2014-03-11 | 2014-05-21 | 辽宁兴达电力设备有限公司 | Running state alarm for power transformer |
| CN103824415A (en) * | 2014-03-11 | 2014-05-28 | 辽宁兴达电力设备有限公司 | Power transformer with running state alarm |
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