CN2821724Y - Hand high voltage breaker contact online temperature monitor - Google Patents

Hand high voltage breaker contact online temperature monitor Download PDF

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Publication number
CN2821724Y
CN2821724Y CN 200520074576 CN200520074576U CN2821724Y CN 2821724 Y CN2821724 Y CN 2821724Y CN 200520074576 CN200520074576 CN 200520074576 CN 200520074576 U CN200520074576 U CN 200520074576U CN 2821724 Y CN2821724 Y CN 2821724Y
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CN
China
Prior art keywords
circuit
contact
wireless
resistance
signaling conversion
Prior art date
Application number
CN 200520074576
Other languages
Chinese (zh)
Inventor
陈海昆
周骁威
Original Assignee
上海市电力公司市南供电公司
陈海昆
周骁威
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Application filed by 上海市电力公司市南供电公司, 陈海昆, 周骁威 filed Critical 上海市电力公司市南供电公司
Priority to CN 200520074576 priority Critical patent/CN2821724Y/en
Application granted granted Critical
Publication of CN2821724Y publication Critical patent/CN2821724Y/en

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Abstract

The utility model relates to a handcart type high voltage breaker contact head online temperature monitor, which comprises a power supply circuit, a temperature sensor, a signaling conversion circuit, a wireless coding transmitter, a wireless decoding acceptor, and an alarm circuit, wherein the power supply circuit is composed of power supply conversion circuits arranged on the contact arm of each phase and a current mutual inductor. The temperature sensor transfers temperature signals into a signaling conversion circuit of electrical signal and the wireless emitting encoder and is fixedly connected with the contact arm of each phase of a breaker. The temperature sensor positioned on one side of the contact head is connected with the signaling conversion circuit through a high temperature conducting wire. The output end of the signaling conversion circuit is connected with the wireless emitting encoder for receiving signals, and the output end of the wireless decoding receiver of the signal decoding is connected with the alarm device. The output end of the alarm device is connected with the alarm device and a six-path indicating lamp corresponding to each contact head for displaying the overtemperature state of the contact head. The utility model has the advantages of compact structure, high safety, convenient installation and convenient improvement for old equipment.

Description

Handcart-type primary cut-out contact on-line temperature monitoring device
Technical field
The utility model relates to a kind of primary cut-out contact temperature monitoring device, especially relates to a kind of handcart-type primary cut-out contact on-line temperature monitoring device.
Background technology
Being connected between switch cubicle primary cut-out and high pressure busbar and high-tension cable is that the grafting by dynamic and static contact realizes.When static contact contacts with moving contact, there is a contact resistance between them, when electric current flows through contact, because the existence of contact resistance, cause the heating of contact,, then can quicken the oxidation of dynamic and static contact contact position if the temperature of contact point surpasses setting, oxidation results causes the contact resistance resistance to rise again, impels the contact heating so again and then further elevates the temperature.When the primary cut-out galvanic circle is moved under normal condition, the energy that working current produces changes heat energy into, the rising of appliance material temperature and can the overshoot scope; But when the galvanic circle is undesired, can make appliance material temperature rising overshoot scope, cause declines such as the physical strength of appliance material and physical property, so whether the temperature rise of contact be in normal operation with regard to the representation switch cabinet.Therefore the contact resistance of bus junction needs by " circuit resistance tester " off-line contact resistance to be tested before dispatching from the factory in the high-tension switch cabinet, to guarantee that isolating switch can normally move.But after switch cubicle dispatches from the factory, owing in transportation, installation process, be subjected to factor affecting such as percussion, installation, cause contact resistance to increase, when pushing as handcart, the loose contact of splicing position all can cause the abnormal ascending of contact temperature.If untimely discovery, untimely maintenance causes serious equipment breakdown sometimes.For the serious accidents such as switch blast that prevent that contact temperature rise from causing unusually, more domestic producers and run unit adopt some to diagnose the temperature rise at other positions such as monitoring contact, bus as variable color sheet, infrared thermal imaging through regular meeting.But, these methods since exist deviation big, can not teletransmission or can't directly observe defective such as heat generating spot, can not be effective as a kind of preventive measure to promote, cause the accident of power failure to take place.
Summary of the invention
The purpose of this utility model provides a kind of compact conformation, and is safe and reliable, and installation side makes, and is convenient to old scrap build, economical and practical handcart-type primary cut-out contact on-line temperature monitoring device.
The utility model is that the technical scheme that achieves the above object is: a kind of handcart-type primary cut-out contact on-line temperature monitoring device, comprise power circuit, temperature sensor, signaling conversion circuit, the wireless encoding transmitter, wireless decoding receiver and warning circuit, described power circuit is made of the current transformer and the power-switching circuit that are installed on each phase contact arm, temperature sensor, temperature signal is converted on the signaling conversion circuit of electric signal and each phase contact arm that the wireless transmit scrambler is fixedly connected on isolating switch, the temperature sensor that is positioned at contact one side is connected with signaling conversion circuit by high temperature wire, signaling conversion circuit output termination wireless transmit scrambler, be used for received signal and with the output terminal device taking alarm of the wireless decoding receiver of signal decoding, the warning device output terminal connects six road pilot lamp and the alarm of the demonstration contact overtemperature state corresponding with each contact.
The utility model adopts the beneficial effect after the technique scheme to be:
1, the utility model is installed in temperature sensor, signaling conversion circuit and wireless encoding transmitter on the contact arm of every phase, make this partial circuit be arranged on fully in the insulating cylinder of contact arm, do not influence original phase insulation distance, ensured original insulating capacity, compact conformation uses reliable.
2, the utility model is by being contained in electric current mutual inductance induction current on each phase contact arm as the working power of signaling conversion circuit and wireless encoding transmitter, therefore can continuously provide stable, reliable electric energy, satisfy the requirement of the long-term work of isolating switch.
3, the utility model is because the association that no any circuit connects between every phase, in case every phase contact overtemperature, can will can send wireless signal immediately after the temperature signal conversion, after the wireless decoding receiver receives signal, tell a certain pilot lamp alarm of putting corresponding contact mutually of overtemperature by demoder, can accurately reflect the overheated overtemperature state of each phase contact.
4, the utility model all is by wireless transmission, reception from sampling, transmission and the warning of temperature signal, has realized potential isolation transmission between high-pressure side and the low pressure end.
5, the utility model is simple in structure, and is easy for installation, is convenient to the installation of new equipment and the transformation of old equipment, improves security, the reliability of switchgear operation, can reduce serious accident and take place.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is an electric theory diagram of the present utility model.
Fig. 2 is the mounting structure synoptic diagram of temperature sensor and conversion of signals radiating circuit.
Fig. 3 is the electrical schematic diagram of power-switching circuit.
Fig. 4 is the electrical schematic diagram of signaling conversion circuit.
Embodiment
Handcart-type primary cut-out contact on-line temperature monitoring device as shown in Figure 1 comprises power circuit 1, temperature sensor 2, signaling conversion circuit 3, wireless encoding transmitter 4, wireless decoding receiver 5 and warning circuit 6.Power circuit 1 of the present utility model is made of the current transformer 1-1 and the power-switching circuit 1-2 that are installed on each phase contact arm 8, working power is provided for signaling conversion circuit 3 and wireless encoding transmitter 4.Temperature sensor 2, temperature signal is converted on the signaling conversion circuit 3 of electric signal and each phase contact arm 8 that wireless transmit scrambler 4 is fixedly connected on isolating switch, see shown in Figure 2, current transformer 1-1 of the present utility model tightly is sleeved on the contact arm 8, and temperature sensor 2 is installed in a side of plum blossom pawl head 7 contacts of contact arm 8, with truly, the temperature value of detection contact effectively, temperature sensor 2 is connected with signaling conversion circuit 3 by high temperature wire, and signaling conversion circuit 3 is connected with wireless transmit scrambler 4, by wireless transmit scrambler 4 electric signal is sent, wireless encoding transmitter 4 can adopt commercially available wireless launcher, as adopting PT2262 etc.
See that power-switching circuit 1-2 of the present utility model shown in Figure 3 comprises diode rectifier circuit and filter circuit of pressure-stabilizing, filter circuit of pressure-stabilizing by the resistance R 8 that is connected in parallel on rectification circuit output end and capacitor C 1 and and the stabilivolt group that is connected in a plurality of serial connections of resistance R 8 and capacitor C 1 two ends constitute, make this power-switching circuit can satisfy primary current and under the condition of 50A to 2000A wide variation, work reliably and with long-term, and can bear the impact short-circuit current that the primary circuit electric current reaches 5000A.
See shown in Figure 4, signaling conversion circuit 3 of the present utility model comprises resistance R 2, R3, RT, R1 and comparer IC, resistance R 2, R3 dividing potential drop node connects the inverting input of comparer IC, the resistance R T that links to each other with temperature sensor 2 output terminals and the dividing potential drop node of resistance R 1 connect the positive output end of comparer IC, the output terminal of comparer IC connects output interface after the resistance step-down, wireless transmit scrambler 4 is plugged on this output interface, be serially connected with resistance R 5 and diode D7 between the output terminal of comparer IC and the normal phase input end, temperature sensor 2 is input to the changing value of temperature variant resistance R T among the comparer IC of signaling conversion circuit 3 by high temperature wire, convert temperature variant increased resistance value to voltage signal, and compare with predefined voltage signal, when if the temperature at contact arm 8 upper contact head places exceeds preset value, the input voltage of comparer IC is lower than predefined turnover voltage, the output of comparer IC is uprised by low, then the input of wireless transmit scrambler 4 becomes high level, trigger wireless transmission signal, the coded signal that corresponding contact temperature changes is launched.When wireless transmit scrambler 4 when changing over to low level, wireless transmit scrambler 4 quits work.
Be used for received signal and the wireless decoding receiver 5 and the warning device 6 of signal decoding then is installed in cabinet, the output terminal of wireless decoding receiver 5 device 6 taking alarm, be connected with civil power and working power be provided after rectifying and wave-filtering, voltage stabilizing, for wireless decoding receiver 5 and warning device 6, wireless decoding receiver 5 also adopts the commercially available prod, can adopt PT2272.The connection of warning device 6 output terminals is corresponding to six road pilot lamp of isolating switch six road contact temperature states and the alarm of being controlled by relay, when wireless encoding transmitter 4 is launched the coded signal that the contact temperature on the corresponding contact arm 8 changes, wireless decoding receiver 5 received signals and with corresponding signal decoding, make corresponding pilot lamp shinny, relay adhesive is simultaneously reported to the police.As long as riches all the way gives birth to overheating problem owing to have in six road contacts, six road pilot lamp on the warning device 6 can indicate concrete overtemperature trouble spot, make alarm equipment alarm.The utility model adopts wireless encoding transmitter 4 and wireless decoding receiver 5 to carry out the communication of wireless signal, the online overheated overtemperature state that can accurately reflect each phase contact.

Claims (4)

1, a kind of handcart-type primary cut-out contact on-line temperature monitoring device, it is characterized in that: comprise power circuit (1), temperature sensor (2), signaling conversion circuit (3), wireless encoding transmitter (4), wireless decoding receiver (5) and warning circuit (6), described power circuit (1) is made of the current transformer (1-1) and the power-switching circuit (1-2) that are installed on each phase contact arm (8), temperature sensor (2), temperature signal is converted on the signaling conversion circuit (3) of electric signal and each phase contact arm (8) that wireless transmit scrambler (4) is fixedly connected on isolating switch, the temperature sensor (2) that is positioned at contact one side is connected with signaling conversion circuit (3) by high temperature wire, signaling conversion circuit (3) output termination wireless transmit scrambler (4), be used for received signal and with the output terminal device taking alarm (6) of the wireless decoding receiver (5) of signal decoding, warning device (6) output terminal connects six road pilot lamp and the alarm of the demonstration contact overtemperature state corresponding with each contact.
2, handcart-type primary cut-out contact on-line temperature monitoring device according to claim 1, it is characterized in that: described power-switching circuit (1-2) comprises diode rectifier circuit and filter circuit of pressure-stabilizing, filter circuit of pressure-stabilizing by the resistance R 8 that is connected in parallel on rectification circuit output end and capacitor C 1 and and the stabilivolt group that is connected in a plurality of serial connections at resistance R 8 and capacitor C 1 two ends constitute.
3, handcart-type primary cut-out contact on-line temperature monitoring device according to claim 1, it is characterized in that: described signaling conversion circuit (3) comprises resistance R 2, R3, RT, R1 and comparer IC and peripheral circuit thereof, resistance R 2, R3 dividing potential drop node connect the inverting input of comparer IC, the resistance R T that links to each other with temperature sensor (2) output terminal and the dividing potential drop node of resistance R 1 connect the positive output end of comparer IC, the output terminal of comparer IC is connected with output interface, is serially connected with resistance R 5 and diode D7 between the output terminal of comparer IC and the normal phase input end.
4, handcart-type primary cut-out contact on-line temperature monitoring device according to claim 1, it is characterized in that: described current transformer (1-1) is sleeved on each contact arm (8), and temperature sensor (2) is installed in a side of plum blossom pawl head (7).
CN 200520074576 2005-08-12 2005-08-12 Hand high voltage breaker contact online temperature monitor CN2821724Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520074576 CN2821724Y (en) 2005-08-12 2005-08-12 Hand high voltage breaker contact online temperature monitor

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Application Number Priority Date Filing Date Title
CN 200520074576 CN2821724Y (en) 2005-08-12 2005-08-12 Hand high voltage breaker contact online temperature monitor

Publications (1)

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CN2821724Y true CN2821724Y (en) 2006-09-27

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100533081C (en) * 2007-05-31 2009-08-26 淄博惠工仪器有限公司 Switch cabinet contact temperature monitoring and alarming system
CN101319938B (en) * 2008-07-08 2010-04-07 周骁威 On-line temperature measurement method and device for cable joint of high-voltage plant
CN101894455A (en) * 2010-06-25 2010-11-24 镇江市诚翔电器有限责任公司 Micro wireless temperature monitoring and transmitting device and method for high-voltage electrical equipment
CN102298824A (en) * 2010-06-24 2011-12-28 陈家斌 Remote overtemperature alarm for power cable head
CN102393259A (en) * 2011-11-02 2012-03-28 安徽鑫龙电器股份有限公司 Digital temperature detecting sensor used for vacuum circuit breaker
CN102519626A (en) * 2011-12-09 2012-06-27 沈阳工业大学 Novel temperature measuring device for switch cabinet
CN102759409A (en) * 2012-07-07 2012-10-31 嵊州市电力公司 Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet
CN102944834A (en) * 2012-11-13 2013-02-27 河北省电力公司电力科学研究院 Detection method and device for dedicated circuit breaker of prepayment electric energy meter
CN103324102A (en) * 2013-05-10 2013-09-25 杭州电子科技大学 Wireless control circuit for automatic thin-wall copper tube fresh air handling machine
CN103411692A (en) * 2013-08-09 2013-11-27 南京大全自动化科技有限公司 Temperature measuring device for circuit breaker contact
CN103499395A (en) * 2013-10-18 2014-01-08 国家电网公司 Self-induction high-voltage contact wireless temperature-measuring method and device
CN104122004A (en) * 2014-07-28 2014-10-29 安徽鑫辰电气设备有限公司 Online monitoring device for temperatures of isolation contact of high-voltage distribution device
CN105092902A (en) * 2014-05-06 2015-11-25 国网山东省电力公司潍坊供电公司 Power system switch handcart examination auxiliary apparatus
CN105371983A (en) * 2015-12-15 2016-03-02 河海大学常州校区 Optical fiber temperature measuring device for measuring contact temperature of breaker contact arm
CN109000812A (en) * 2018-08-01 2018-12-14 毛琦 A kind of energy-saving passive and wireless temperature spot control sensor
CN109613426A (en) * 2019-01-16 2019-04-12 厦门理工学院 A kind of high-voltage circuitbreaker Mume flower contact Diagnosis of Aging

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100533081C (en) * 2007-05-31 2009-08-26 淄博惠工仪器有限公司 Switch cabinet contact temperature monitoring and alarming system
CN101319938B (en) * 2008-07-08 2010-04-07 周骁威 On-line temperature measurement method and device for cable joint of high-voltage plant
CN102298824A (en) * 2010-06-24 2011-12-28 陈家斌 Remote overtemperature alarm for power cable head
CN102298824B (en) * 2010-06-24 2013-04-03 陈家斌 Remote overtemperature alarm for power cable head
CN101894455B (en) * 2010-06-25 2012-10-17 镇江市诚翔电器有限责任公司 Micro wireless temperature monitoring and transmitting device and method for high-voltage electrical equipment
CN101894455A (en) * 2010-06-25 2010-11-24 镇江市诚翔电器有限责任公司 Micro wireless temperature monitoring and transmitting device and method for high-voltage electrical equipment
CN102393259A (en) * 2011-11-02 2012-03-28 安徽鑫龙电器股份有限公司 Digital temperature detecting sensor used for vacuum circuit breaker
CN102519626A (en) * 2011-12-09 2012-06-27 沈阳工业大学 Novel temperature measuring device for switch cabinet
CN102759409A (en) * 2012-07-07 2012-10-31 嵊州市电力公司 Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet
CN102944834A (en) * 2012-11-13 2013-02-27 河北省电力公司电力科学研究院 Detection method and device for dedicated circuit breaker of prepayment electric energy meter
CN102944834B (en) * 2012-11-13 2016-02-03 河北省电力公司电力科学研究院 A kind of detection method of prepayment meter definite purpose circuit breaker and device
CN103324102B (en) * 2013-05-10 2015-09-02 杭州电子科技大学 Thin-wall copper pipe is new blower fan radio control circuit automatically
CN103324102A (en) * 2013-05-10 2013-09-25 杭州电子科技大学 Wireless control circuit for automatic thin-wall copper tube fresh air handling machine
CN103411692A (en) * 2013-08-09 2013-11-27 南京大全自动化科技有限公司 Temperature measuring device for circuit breaker contact
CN103499395A (en) * 2013-10-18 2014-01-08 国家电网公司 Self-induction high-voltage contact wireless temperature-measuring method and device
CN105092902A (en) * 2014-05-06 2015-11-25 国网山东省电力公司潍坊供电公司 Power system switch handcart examination auxiliary apparatus
CN105092902B (en) * 2014-05-06 2018-07-20 国网山东省电力公司潍坊供电公司 Electric system switching on/off handcart examines auxiliary device
CN104122004A (en) * 2014-07-28 2014-10-29 安徽鑫辰电气设备有限公司 Online monitoring device for temperatures of isolation contact of high-voltage distribution device
CN105371983A (en) * 2015-12-15 2016-03-02 河海大学常州校区 Optical fiber temperature measuring device for measuring contact temperature of breaker contact arm
CN109000812A (en) * 2018-08-01 2018-12-14 毛琦 A kind of energy-saving passive and wireless temperature spot control sensor
CN109613426A (en) * 2019-01-16 2019-04-12 厦门理工学院 A kind of high-voltage circuitbreaker Mume flower contact Diagnosis of Aging

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20060927

Termination date: 20090914

C17 Cessation of patent right