CN108110733A - The temperature protective device of low voltage power capacitor - Google Patents
The temperature protective device of low voltage power capacitor Download PDFInfo
- Publication number
- CN108110733A CN108110733A CN201611054613.9A CN201611054613A CN108110733A CN 108110733 A CN108110733 A CN 108110733A CN 201611054613 A CN201611054613 A CN 201611054613A CN 108110733 A CN108110733 A CN 108110733A
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- China
- Prior art keywords
- capacitor
- temperature
- protective device
- relay
- temperature relay
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention relates to the technical fields of power system reactive power compensation; provide a kind of temperature protective device of low voltage power capacitor; including capacitor; the capacitor internal is equipped with three phase capacitance; the temperature protective device includes temperature relay; the temperature relay is arranged at the compatible cores of B of the three phase capacitance, and the temperature relay is connected to capacitor contactor after being connected at the main terminal of the capacitor upper end；Wherein, when the capacitor internal temperature is more than the limit value of temperature relay preset temperature, temperature relay cut-out capacitor contactor makes capacitor exit work.The present invention enables protective condenser to be protected in time, is not burnt out due to temperature is excessively high, that is, ensure that reliability service and the personal safety of equipment, ensures being smoothed out for production；Also make equipment reliability service simultaneously, power factor is stablized, and can bring direct economic benefit.
Description
Technical field
The present invention relates to the technical fields of power system reactive power compensation, and in particular to a kind of temperature of low voltage power capacitor
Protective device.
Background technology
In power grid, power is divided into active power, reactive power and apparent energy.In AC network, due to have impedance and
Reactance（Induction reactance and capacitive reactance）While exist, so the electrical power that power supply is transported to electric appliance is not fully done work.Because wherein have
A part of electrical power（The electric energy that inductance and capacitance are stored up）It remains to feed back to power grid, therefore, all reality is electric appliance (electrical resistance property)
The electrical power absorbed is active power.The electric energy that inductance and capacitance are stored up remains to feed back to power grid, this Partial Power is in power supply
It is swapped between reactance, exchanges without consuming, be known as reactive power.The transmission of reactive power aggravates the burden of power grid, makes
Grid loss increases, it is therefore desirable to it be carried out nearby and local compensation.Shunt capacitor can compensate or balanced electrical equipment
Lagging reactive power.When capacitive reactive power Qc is equal to lagging reactive power QL, power grid transmitting active power P.It is existing
Capacitor body used in industry, due to no national standard, professional standard, design specification requirement is not to be temperature guarantor
Shield；Due to the requirement of no standards and norms, manufacturer is not increase this safeguard measure inside capacitor body.
Existing cylinder low-voltage parallel-connection power capacitor, does not have temperature protection measure in body.In 380V electric system,
When carrying out reactive-load compensation for AC system, reactive-load compensation is carried out using low-voltage parallel-connection power capacitor, this capacitor is in work
Since frequent movement and harmonic wave effect are easy to largely generate heat during work, cause temperature rise too fast, capacitor caused to burn out,
It cannot effectively protective condenser burn out due to temperature is excessively high, therefore, the prior art need to be improved.
The content of the invention
The defects of to overcome present in the prior art, now provides a kind of temperature protective device of low voltage power capacitor, keeps away
Exempt from capacitor to burn out due to temperature is excessively high.
The present invention provides a kind of temperature protective device of low voltage power capacitor, including capacitor, in the capacitor
Portion is equipped with three phase capacitance, and the temperature protective device includes temperature relay, and the temperature relay is arranged on the three phase capacitance
The compatible cores of B at, the temperature relay is connected to capacitor contact after being connected at the main terminal of the capacitor upper end
Device；
Wherein, when the capacitor internal temperature is more than the limit value of temperature relay preset temperature, temperature relay cut-out capacitance
Device contactor, makes capacitor exit work.
Further, the temperature relay is equipped with normally closed contact, and the normally closed contact is connected to by two conducting wires
Main terminal, so that control circuit connection is used.
Further, two conducting wires are connected to after main terminal connects respectively with the coil of capacitor contactor and capacitor
The main contacts of tentaculum is connected, convenient for by capacitor connecting and disconnecting.
Due to the use of above technical scheme, the advantageous effect made it have is the present invention：
1st, protective condenser can be protected in time, not burnt out due to temperature is excessively high, that is, ensure that the reliability service of equipment
And personal safety, ensure being smoothed out for production；
2nd, equipment reliability service is made, power factor is stablized, and can bring direct economic benefit.
Description of the drawings
Fig. 1 is the structure diagram of the temperature protective device of low voltage power capacitor of the present invention；
Fig. 2 is the control principle drawing of the temperature protective device of low voltage power capacitor of the present invention.
Reference numeral in corresponding Figure of description is with reference to as follows：
Capacitor 1；The compatible cores 2 of A；The compatible cores 3 of B；The compatible cores 4 of C；Temperature relay 5；Main terminal 6；Capacitor contactor 7；It is main to touch
Point 8；Screw 9 is installed.
Specific embodiment
In order to which technological means, creation feature, reached purpose and effect for realizing invention are easy to understand, below in conjunction with
Attached drawing, the present invention is further explained.
The preferred embodiment of the present invention provides a kind of temperature protective device of low voltage power capacitor, such as Fig. 1 and Fig. 2
Shown, including capacitor 1, capacitor 1 is internally provided with three phase capacitance, is respectively the compatible cores 2 of A, the compatible cores 3 of B and the compatible cores 4, B of C
Compatible core 3 is arranged on centre position, and three phase capacitance core is provided spaced, and temperature protective device includes temperature relay 5, temperature after
Electric appliance 5 is arranged at the compatible cores 3 of B of three phase capacitance core, and temperature relay 5 is made after being connected at the main terminal 6 of capacitor upper end
External terminal is connected to capacitor contactor 7；
Wherein, when 1 internal temperature of capacitor is more than the limit value of 5 preset temperature of temperature relay, temperature relay 5 cuts off capacitor
Contactor 7 makes capacitor 1 exit work.
In addition, temperature relay 5 is connected on equipped with normally closed contact K1, K1 in control circuit, normally closed contact K1 passes through two
Root conducting wire is connected to main terminal 6, and so that control circuit connection is used, two conducting wires are connected to after main terminal 6 difference that extends outwardly
It is connected with the coil KM of capacitor contactor 7 and the auxiliary contact KM1 of capacitor contactor 7, convenient for passing through capacitor contactor
Main contacts 8 by 1 connecting and disconnecting of capacitor, capacitor 1 is fixed on by installing screw 9 in fixed plate after completing installation.
In specifically used, in conjunction with shown in Fig. 2, temperature relay 5 is arranged at the compatible cores 3 of B first, by it often
It closes contact K1 to be drawn out to two concept conducting wires at the main terminal 6 of 1 upper end of capacitor, makes external terminal, then by conducting wire
One end connects the coil of capacitor contactor 7, and another conducting wire is connected to the auxiliary contact KM1 of capacitor contactor 7, temperature after
The normally closed contact K1 of electric appliance 5 is connected in control loop, when 1 internal temperature of capacitor is more than set by temperature relay 5
During limit value, the normally closed contact of temperature relay 5 is opened, and cuts off the coil KM of capacitor contactor 7, the master of capacitor contactor 7
Contact 8 disconnects, and exits work so as to disconnect the capacitor 1, protective effect is played to capacitor 1.
Reliably applicable temperature relay 5 is mounted on 1 body interior of capacitor by the present invention, and not depending on external condition just has
The temperature protection function of body, protective condenser are not burnt out due to temperature is excessively high；And it can directly be connected on the throwing of capacitor 1
Control loop is cut, centralized Control can also be carried out, ensure that being smoothed out for production.
The specific embodiment of invention is described above.It is to be appreciated that invention be not limited to it is above-mentioned specific
Embodiment, wherein the equipment and structure be not described in detail to the greatest extent are construed as being practiced with the common mode in this field；
Those skilled in the art can make within the scope of the claims various deformations or amendments make it is several it is simple deduce, deformation or
It replaces, this has no effect on the substantive content of invention.
Claims (3)
1. a kind of temperature protective device of low voltage power capacitor, including capacitor, the capacitor internal is equipped with three phase capacitance,
It is characterized in that：The temperature protective device includes temperature relay, and the temperature relay is arranged on the B of the three phase capacitance
At compatible core, the temperature relay is connected to capacitor contactor after being connected at the main terminal of the capacitor upper end；
Wherein, when the capacitor internal temperature is more than the limit value of temperature relay preset temperature, temperature relay cut-out capacitance
Device contactor, makes capacitor exit work.
2. the temperature protective device of low voltage power capacitor as described in claim 1, it is characterised in that：The temperature relay
Normally closed contact is equipped with, the normally closed contact is connected to main terminal by two conducting wires.
3. the temperature protective device of low voltage power capacitor as claimed in claim 2, it is characterised in that：Two conducting wires connect
The main contacts after main terminal respectively with the coil of capacitor contactor and capacitor contactor is connected to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611054613.9A CN108110733A (en) | 2016-11-25 | 2016-11-25 | The temperature protective device of low voltage power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611054613.9A CN108110733A (en) | 2016-11-25 | 2016-11-25 | The temperature protective device of low voltage power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108110733A true CN108110733A (en) | 2018-06-01 |
Family
ID=62204255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611054613.9A Pending CN108110733A (en) | 2016-11-25 | 2016-11-25 | The temperature protective device of low voltage power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108110733A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200941548Y (en) * | 2006-07-28 | 2007-08-29 | 江苏现代电力电容器有限公司 | Low voltage power capacitor combined appliance having internal temp protection of capacitor |
| CN202836824U (en) * | 2012-10-25 | 2013-03-27 | 长兴县供电局 | Low-voltage intelligent capacitor temperature measuring system |
| CN104167744A (en) * | 2014-08-21 | 2014-11-26 | 巢湖市金辉自控设备有限公司 | Intelligent temperature control low-voltage power capacitor |
| CN105353792A (en) * | 2015-12-07 | 2016-02-24 | 安徽巨森电器有限公司 | Reactive compensation device having capacitor temperature detection and protection functions |
-
2016
- 2016-11-25 CN CN201611054613.9A patent/CN108110733A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200941548Y (en) * | 2006-07-28 | 2007-08-29 | 江苏现代电力电容器有限公司 | Low voltage power capacitor combined appliance having internal temp protection of capacitor |
| CN202836824U (en) * | 2012-10-25 | 2013-03-27 | 长兴县供电局 | Low-voltage intelligent capacitor temperature measuring system |
| CN104167744A (en) * | 2014-08-21 | 2014-11-26 | 巢湖市金辉自控设备有限公司 | Intelligent temperature control low-voltage power capacitor |
| CN105353792A (en) * | 2015-12-07 | 2016-02-24 | 安徽巨森电器有限公司 | Reactive compensation device having capacitor temperature detection and protection functions |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180601 |
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| RJ01 | Rejection of invention patent application after publication |