CN201750343U - Voltage detection control device - Google Patents
Voltage detection control device Download PDFInfo
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- CN201750343U CN201750343U CN2010202561224U CN201020256122U CN201750343U CN 201750343 U CN201750343 U CN 201750343U CN 2010202561224 U CN2010202561224 U CN 2010202561224U CN 201020256122 U CN201020256122 U CN 201020256122U CN 201750343 U CN201750343 U CN 201750343U
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Abstract
The utility model discloses a voltage detection control device comprising an autotransformer, a switch set and a detection control unit, wherein the autotransformer is provided with a plurality of windings; each winding is provided with a primary side and a secondary side; the primary side is connected with at least two phases of an input three-phase power supply respectively, and taps are respectively pulled out from the secondary side where the number of turns is different so as to selectively form a one-phase power output end; the switch set is provided with a plurality of electromagnetic switches and corresponding switch joints that are respectively between the taps of the secondary sides of all the windings of the autotransformer, and the closing or opening of the corresponding switch joints is decided according to that an electromagnetic switch is excited or not; and the detection control unit is connected with the phase power output end of each winding of the autotransformer and an electromagnetic switch assembly of the switch set respectively so as to judge the phase voltage of input power and control the closing or opening of each switch joint, so that the phase power output end of each winding of the autotransformer is connected with different taps of the secondary side. The device can avoid unnecessary loss of electric power and improve power-utilizing efficiency.
Description
Technical field
The utility model is relevant for a kind of detecting voltage control device, especially refer to that a kind of voltage-phase that can effective monitoring power supply (especially civil power) changes, and then adjust the power source voltage value, avoid meaningless power loss, and the detecting voltage control device that improves power consumption efficiency.
Background technology
Present generating and conduction operation, carry out with three-phase alternating current (Three phasealternating) mostly, because three-phase power can use less or more small-sized conductor, but not provide the multiple single phase system of same power, and three-phase power also can see through decides torque (Constant torque) CD-ROM drive motor, replaces the pulse torque (Pulsatingtorque) of single-phase motor; Add that each phase place of three-phase power all has the identical voltage of 120 ° of skews (with balanced loaded electric current), the total electricity of all three-phases is all stable and consistent, therefore becomes the normal response mode in the whole world.
In principle, the application of unidirectional power supply and three phase mains, can find out the advantage place:
(1) compared to single phase rectifier circuit, rectified three-phase circuit has lower ripple and higher power;
(2) with regard to transmitting identical electric power, the comparable single phase poaer supply of three phase mains is saved pressure drop and the power loss of half;
(3) with regard to relevant equipment such as generator, transformer and motor, the volume of threephase generator, transformer and the motor volume than single-phase generator, transformer and motor relatively is bigger, and cost is higher;
(4) threephase motor can produce rotating magnetic field voluntarily, and single-phase motor then must install actuating coil additional, so the characteristic of threephase motor is preferable and efficient is higher;
(5) three-phase system is to be formed by complete single-phase sinusoidal wave the integration, can select single-phase voluntarily or the three-phase use by the user, so applicability is higher relatively.
Therefore, the place that power consumption is bigger (as factory, hospital, school etc.) select the higher three phase mains of efficient naturally for use.Domestic general people's livelihood electricity consumption is 220V/110V, as adopt three phase mains, between each phase (UV, VW, voltage WU) they are 220V, if get wherein two-phase (UV) as single phase poaer supply, its voltage also is 220V, but for considering the consume in the electric power transport process and make client have the power supply of enough voltage available, (UV between each phase of general three phase mains, VW, it is a lot of that voltage WU) all exceeds 220V.
However, select three phase mains or get wherein two-phase when using single phase poaer supply when client, client still must be converted to higher voltage relatively low low-voltage (as 200～220V); But, in the transfer process of high low-voltage, promptly having caused the meaningless loss of electric power, this loss not only will be married again user's electric cost, with regard to whole electric power resource, also cause waste simultaneously.
The utility model content
Main purpose of the present utility model is to provide a kind of detecting voltage control device, and it can avoid meaningless power loss, improves power consumption efficiency.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of detecting voltage control device comprises an autotransformer, a switches set and a detecting control unit; Autotransformer has a plurality of windings, and each winding has primary side and secondary side respectively, and wherein primary side is connected with two of input three phase mains respectively at least, and its secondary side is pulled out tap respectively in the different numbers of turn, optionally to constitute a phase power output end; Switches set has a plurality of electromagnetic switch and corresponding make and break contact, and make and break contact is divided between each tap of each winding secondary side of autotransformer, by the whether excitatory switching that determines relative make and break contact of electromagnetic switch; The detecting control unit connects with the power output end mutually of each winding of autotransformer and the electromagnetic switch component of switches set respectively, to judge each phase voltage of input power supply, and the switching of each make and break contact of control switch group, taps different on the phase power output end that makes each winding of autotransformer and the secondary side connect.
Above-mentioned detecting control unit further comprises: plural phase voltage detecting circuit, have an input and an output respectively, the power output end mutually of its input and each winding of autotransformer connects, and detecting this phase power source voltage value, and is converted to direct voltage and is sent by output; Circuit is selected in one multitask, has plural input and at least one output, and each input is connected with the output of each phase voltage detecting circuit respectively, with selection wherein the output signal of a phase voltage detecting circuit send by output; One microprocessor has plural input and plural output, and wherein an input selects circuit to be connected with multitask; One switches circuit, formed by a driver and plural relay, this driver is controlled by microprocessor, each relay has make and break contact, each make and break contact is connected between the electromagnetic switch and a power supply of aforementioned switches group, so that see through the whether excitatory of this driver and each electromagnetic switch of relay control switch group by microprocessor.
Above-mentioned detecting control unit comprises that further one is each circuit of detecting control unit and the power circuit of switches set power supply.
Above-mentioned power circuit comprises a transformer, two bridge rectifiers and a voltage stabilizing circuit, the primary side of this transformer and each wherein two being connected of power output end mutually, to obtain a single phase alternating current power supply, this single phase alternating current power supply is delivered to the input of two bridge rectifiers respectively after the transformer step-down, to be rectified into DC power supply, through the dc supply of reserve quota is provided after the bridge rectifier rectification wherein, then carry out voltage stabilizing through steady reduction voltage circuit again by the power supply after another bridge rectifier rectification, so that many group dc supplies and reference voltage to be provided.
Above-mentioned commutation circuit is made up of a driver and plural relay, and this driver has plural input, and it is connected with the output of microprocessor respectively, and output end of driver then is connected with the magnetizing coil of each relay respectively; Described relay comprises plural make and break contact respectively, and the make and break contact of each relay is connected between each electromagnetic switch of aforementioned switches group and the direct current power supply.
Above-mentioned each plural phase voltage detecting circuit is made up of a transformer, a bridge rectifier and an OP amplifier respectively, and the primary side of this transformer connects with aforementioned power output end mutually respectively, obtains its voltage between phases respectively; The secondary side of transformer is connected with the input of bridge rectifier, and the phase voltage after step-down is rectified into direct voltage, delivers to the OP amplifier again and carries out the signal amplification.
Above-mentioned multitask selects circuit to be made up of a microcontroller, a multiplexer and an amplifier, this microcontroller has a plurality of inputs and at least one output, this multiplexer has plural input, at least one output and a control end, the output of aforementioned each phase voltage detecting circuit is connected with the input of microcontroller and multiplexer respectively, and the control end of multiplexer is connected with the output of microcontroller again.
Above-mentioned microprocessor has plural input and plural output, wherein sets up a variable resistor separately on two inputs, and its another input is connected with aforementioned amplifier, each the phase voltage signal that is detected with reception.
Above-mentioned autotransformer is to be provided with three windings on an iron core, and each winding has primary side and secondary side respectively, and its primary side constitutes each phase power input of three phase mains respectively, its secondary side then respectively with one mutually power output end connect.
Above-mentioned autotransformer further sets up a temperature sensor separately on its each winding.
After adopting said structure, the utility model was detected the change in voltage of this each phase place of power supply earlier, and is used by client after being adjusted to suitable magnitude of voltage again before power supply (mains supply) enters client, thereby avoid meaningless power loss, and improve power consumption efficiency.
Description of drawings
Fig. 1 is the use configuration reference diagram of the utility model detecting voltage control device;
Fig. 2 is the composition configuration diagram of the utility model detecting voltage control device.
The main element symbol description
10 detecting voltage control device, 11 autotransformers
111 windings, 112 windings
113 windings, 12 switches set
121 electromagnetic switch, 122 electromagnetic switch
123 electromagnetic switch, 124 electromagnetic switch
13 detecting control units, 141 temperature sensors
142 temperature sensors, 143 temperature sensors
20 three phase mains, 30 clients
Embodiment
Relevant characteristics of the present utility model can be with reference to the detailed description of the drawings and Examples of this case and obtain clearly to understand.
At first consult shown in Figure 1, it is a kind of in order to before entering client 30 at three phase mains 20 (mains supply) that the utility model detecting voltage control device 10 provides, detect the change in voltage of these three phase mains 20 each phase places earlier, and use by client 30 again after being adjusted to suitable magnitude of voltage, thereby avoid meaningless power loss, and the detecting control device that improves power consumption efficiency.
As shown in Figure 2, the utility model detecting voltage control device 10 comprises: an autotransformer 11, a switches set 12, and a detecting control unit 13, will introduce respectively below.
Switches set 12 has a plurality of electromagnetic switch 121,122,123,124 and corresponding make and break contact (MFL, MFM, MFH, MR), make and break contact (MFL, MFM, MFH MR) is divided between each tap of autotransformer 11 each winding 111,112,113 secondary side; As each winding 111,112,113 wherein taps (high-pressure side) (U, V, W) be respectively with power output end (U mutually, V W) connects, as for each winding 111,112, other tap (U3 of 113, U2, U1), (V 3, V2, V1), (W3, W2, W1) a plurality of make and break contact (MFL by this switches set 12 then, MFM, MFH MR) interconnects, utilize electromagnetic switch 121,122,123,124 whether excitatory relative make and break contact (MFL, MFM, the MFH of determining, MR) switching, when different electromagnetic switch 121,122,123,124 when excitatory, each winding 111 of autotransformer 11,112,113 will be through different taps (U3, V3, W3), (U2, V2, W2) or (U1, V1, W1) with power output end (U mutually, V W) connects, because each winding 111,112,113 tap (U, U3, U2, U1), (V, V3, V2, V1), (W, W3, W2, W1) number of turn is to be successively decreased to low-pressure end by high-pressure side, it represents different pressure drop ratios respectively, as the tap of past more lower end and power output end (U, V mutually, W) connect, by the phase power output end (U, V, the voltage of W) sending are promptly low more; In addition, switches set 12 further comprises a plurality of normally closed switch contact (MFL, MFM, MFH, MR), it is connected with each electromagnetic switch 121,122,123,124 across, to produce mutual repulsion effect, guarantee each electromagnetic switch 121,122,123,124 and corresponding make and break contact (MFL, MFM, MFH, independent running MR).
In addition, the detecting control unit 13 respectively with autotransformer 11 each winding 111,112,113 phase power output end (U, V, W) and each electromagnetic switch component 121 of switches set 20,122,123,124 connect, with each phase voltage of judgement input power supply, and control switch group 20 each make and break contact (MFL, MFM, MFH, switching MR) makes autotransformer 11 each winding 111,112,113 phase power output end (U, V, W) with secondary side on different tap (U3, U2, U1), (V3, V2, V1), (W3, W2 W1) connect, thereby after will importing power supply and carrying out step-down, (U, V W) send by each phase power output end again.
This detecting control unit 13 further includes a plurality of phase voltage detecting circuits, a multitask selects circuit, a microprocessor, to switch a circuit and a power circuit, below will introduce respectively.
Plural number phase voltage detecting circuit has an input and an output respectively, (U, V W) connect the power output end mutually of its input and autotransformer 11 each winding 111,112,113, detecting this phase power source voltage value, and be converted to direct voltage and send by output; During enforcement, each plural phase voltage detecting circuit is made up of a transformer, a bridge rectifier and an OP amplifier respectively, the primary side of this transformer respectively with the aforementioned (U of power output end mutually, V, W) connect, obtaining its voltage between phases respectively, and the secondary side of transformer is connected with the input of bridge rectifier, phase voltage after step-down is rectified into direct voltage, delivers to the OP amplifier again and carry out the signal amplification.
Multitask selects circuit to have plural input and at least one output, and each input is connected with the output of aforementioned each phase voltage detecting circuit respectively, with selection wherein the output signal of a phase voltage detecting circuit send by output; During enforcement, this multitask selects circuit mainly to be made up of a microcontroller, a multiplexer and an amplifier, this microcontroller has plural input and at least one output, described multiplexer has plural input, at least one output and a control end, the output of aforementioned each phase voltage detecting circuit is connected with the input of microcontroller and multiplexer respectively, and the control end of multiplexer is connected with the output of microcontroller; Like this, utilize the switching of microprocessor controls multiplexer, each phase voltage can be delivered to amplifier through the multitask switching alternately of multiplexer and carry out the signal amplification.
Microprocessor has a plurality of inputs and a plurality of output, and wherein an input selects circuit to be connected with multitask; During enforcement, this microprocessor is as the s operation control maincenter, can be for judging the minimum phase voltage of voltage, and compare with a reference voltage value of setting, this microprocessor has a plurality of inputs and a plurality of output, wherein sets up a variable resistor separately on two inputs, for setting aforementioned reference voltage value, so that compare with each phase voltage that detects, and its another input is connected with aforementioned amplifier, each the phase voltage signal that is detected with reception.
Commutation circuit mainly is made up of a driver and plural relay, this driver is controlled by microprocessor, each relay has make and break contact, each make and break contact is connected between the electromagnetic switch and a power supply of aforementioned switches group, so that see through the whether excitatory of this driver and each electromagnetic switch of relay control switch group by microprocessor; During enforcement, driver has a plurality of inputs, it is connected with the output of microprocessor respectively, output end of driver then is connected with the magnetizing coil of each relay respectively again, this relay comprises a plurality of make and break contacts respectively, the make and break contact of each relay is connected between each electromagnetic switch of aforementioned switches group and the direct current power supply, so that see through the whether excitatory of this driver and each electromagnetic switch of relay control switch group by microprocessor.
Power circuit is supplied the electricity consumption of working power with each circuit of thinking the detecting control unit and this switches set; During enforcement, described power circuit comprises a transformer, two bridge rectifiers and a voltage stabilizing circuit, the primary side of this transformer and each wherein two being connected of power output end mutually, to obtain a single phase alternating current power supply, this single phase alternating current power supply is delivered to the input of two bridge rectifiers respectively after the transformer step-down, to be rectified into DC power supply, through the dc supply of reserve quota (as 204V) is provided after the bridge rectifier rectification wherein, then carry out voltage stabilizing through steady reduction voltage circuit again by the power supply after another bridge rectifier rectification, so that many group dc supplies and reference voltage to be provided.
To sum up, when autotransformer 11 each winding 111,112, phase power input (R on 113 primary sides, S, when T) having power supply to send into, three phase mains is via each winding 111,112, tap (the U of 113 high-pressure sides, V, W) directly deliver to phase power output end (U, V, W), each phase voltage of this three phase mains is detected by this phase voltage detecting circuit respectively immediately, multitask through microcontroller and multiplexer in this multitask selection circuit is switched, making each phase voltage alternately of three phase mains deliver to microprocessor judges, this microprocessor will be found out minimum phase voltage earlier after relatively, and then judge that whether this phase voltage is greater than the reference voltage value of setting, if be equal to or less than reference voltage value, each phase voltage of expression input voltage is not high, so do not exist high pressure to change the loss problem of low pressure, so each winding 111,112, normal open switch contact (MFL on 113 secondary sides, MFM, MFH MR) keeps open circuit, and the three phase mains of input will be through autotransformer 11 but do not done step-down and handle and directly send.
Detecting control unit 13 will continue to monitor the changing condition of three phase mains, when in case a minimum phase voltage is higher than the reference voltage value of microprocessor setting in the three phase mains, then exceed reference voltage value in various degree according to this phase voltage by microprocessor, seeing through commutation circuit selects to make wherein a corresponding electromagnetic switch 121,122,123,124 excitatory, and then make the make and break contact (MFL corresponding with this electromagnetic switch, MFM, MFH, MR) closure.
For example, when the microprocessor operation result is when making on electromagnetic switch 122 conductings and each winding 111,112,113 secondary sides corresponding make and break contact (MFM) closed, each winding 111,112,113 secondary side is with tap (U2, V2, W2) above around circle high-pressure side (U, V, W) respectively with power output end (U mutually, V W) connects, to reach the purpose that reduces each phase voltage of three phase mains.And under the situation of electromagnetic switch 122 conductings and make and break contact (MFM) closure, because of its normally closed switch contact (MFM) then present open-circuit condition, so the electric power loop that also cuts off other electromagnetic switch 121,123,124 operates so can guarantee electromagnetic switch 122 and the independent of make and break contact (MFM).
In addition, aforementioned autotransformer 11 can further set up a temperature sensor 141,142,143 separately on its each winding 111,112,113, each temperature sensor 141,142,143 is also controlled a normally closed switch contact respectively, each normally closed switch contact is cascaded, when if the temperature of these autotransformer 11 arbitrary windings 111,112,113 arrives predetermined temperature, its normally closed switch contact promptly then present open-circuit condition, to send a signal back to microprocessor this moment through an optical coupler, produce caution message or interruption of work by microprocessor.
And, when the utility model detecting voltage control device applies to the three-phase voltage source of different voltage specifications, need only be at the phase power input (R of autotransformer 11, S), phase power output end (U, V) and detecting establish a transformer respectively between the control unit 13, monitor and the three phase mains of input is carried out delivering to detecting control unit 13 again after the step-down.
Utilize the aforementioned circuit design guaranteeing under the prerequisite of Electrical Safety, the utility model detecting voltage control device provides a multi-segment voltage handoff functionality, when the primary side of each autotransformer is connected with two of input power supply respectively at least, under initial state, switches set is failure to actuate, three phase mains will be sent by each phase power end of autotransformer, each phase voltage will select circuit to ask the output of each phase voltage detecting circuit and detect by multitask, and then deliver to the microprocessor interpretation respectively, this microprocessor will judge in advance what person of each phase voltage is for minimum, compare with this a minimum phase voltage and a reference voltage value of setting again, if minimum phase voltage is lower than reference voltage, even three phase mains is directly sent, if be higher than this reference voltage value, then microprocessor will be looked this minimum phase voltage greater than reference voltage value in various degree, see through the make and break contact in the commutation circuit selection connection switches set, make the phase voltage output of each winding of autotransformer switch with secondary side on different tap connections, this moment, each winding promptly became a step-down transformer, will import power supply and go ahead of the rest and send into client again after the step-down; So not only can avoid meaningless power consumption waste, still can guarantee normal power supply client.
What deserve particular mention is, whether this microprocessor decision is to importing the Rule of judgment that power supply carries out step-down, be that voltage with the minimum wherein phase of voltage in the input power supply is as judging object, but not depending on the mean value of each phase voltage, reason is: the prerequisite that improves power consumption efficiency should be that Electrical Safety is guaranteed.So-called Electrical Safety is meant that the input power source voltage should not be lower than the critical value of a safety, if voltage subcritical value promptly can influence Electrical Safety.Therefore, if the mean value of getting each phase voltage is as judging object, because each phase power source voltage may be because of uneven different, under this situation, if the mean value of getting each phase voltage is as judging object, though mean value is higher than critical value, but when carrying out the voltage adjustment, be that each phase voltage is downgraded an identical value simultaneously, under this situation, promptly may cause a certain phase voltage subcritical value and directly impact Electrical Safety; Based on aforementioned security reason, the utility model does not adopt the mean value of each phase voltage as judging object, but with the voltage of the minimum wherein phase of voltage in the input power supply as judging object, under this situation, as long as minimum phase voltage is higher than reference voltage value, other phase voltage must be higher than reference voltage value, when at the same time each phase voltage being downgraded, the situation of a certain voltage subcritical value can not take place, thereby can guarantee Electrical Safety.
In sum, the utility model provides a preferable feasible detecting voltage control device, so propose the application of utility model patent in accordance with the law; Technology contents of the present utility model and technical characterstic the sixth of the twelve Earthly Branches disclose as above, yet the personage who is familiar with this technology still may do various replacement and the modifications that do not deviate from this case creation spirit based on announcement of the present utility model.Therefore, the protection range of this case should be not limited to embodiment and disclose, and should comprise various replacement and the modifications that do not deviate from this case, and is contained by claim.
Claims (10)
1. a detecting voltage control device is characterized in that: comprise an autotransformer, a switches set and a detecting control unit;
Autotransformer has a plurality of windings, and each winding has primary side and secondary side respectively, and wherein primary side is connected with two of input three phase mains respectively at least, and its secondary side is pulled out tap respectively in the different numbers of turn, optionally to constitute a phase power output end;
Switches set has a plurality of electromagnetic switch and corresponding make and break contact, and make and break contact is divided between each tap of each winding secondary side of autotransformer, by the whether excitatory switching that determines relative make and break contact of electromagnetic switch;
The detecting control unit connects with the power output end mutually of each winding of autotransformer and the electromagnetic switch component of switches set respectively, to judge each phase voltage of input power supply, and the switching of each make and break contact of control switch group, taps different on the phase power output end that makes each winding of autotransformer and the secondary side connect.
2. detecting voltage control device as claimed in claim 1 is characterized in that: described detecting control unit further comprises:
Plural number phase voltage detecting circuit has an input and an output respectively, and the connection of power output end mutually of its input and each winding of autotransformer detecting this phase power source voltage value, and is converted to direct voltage and is sent by output;
Circuit is selected in one multitask, has plural input and at least one output, and each input is connected with the output of each phase voltage detecting circuit respectively, with selection wherein the output signal of a phase voltage detecting circuit send by output;
One microprocessor has plural input and plural output, and wherein an input selects circuit to be connected with multitask;
One switches circuit, formed by a driver and plural relay, this driver is controlled by microprocessor, each relay has make and break contact, each make and break contact is connected between the electromagnetic switch and a power supply of aforementioned switches group, so that see through the whether excitatory of this driver and each electromagnetic switch of relay control switch group by microprocessor.
3. detecting voltage control device as claimed in claim 2 is characterized in that: described detecting control unit comprises that further one is each circuit of detecting control unit and the power circuit of switches set power supply.
4. detecting voltage control device as claimed in claim 3, it is characterized in that: described power circuit comprises a transformer, two bridge rectifiers and a voltage stabilizing circuit, the primary side of this transformer and each wherein two being connected of power output end mutually, to obtain a single phase alternating current power supply, this single phase alternating current power supply is delivered to the input of two bridge rectifiers respectively after the transformer step-down, to be rectified into DC power supply, through the dc supply of reserve quota is provided after the bridge rectifier rectification wherein, then carry out voltage stabilizing through steady reduction voltage circuit again by the power supply after another bridge rectifier rectification, so that many group dc supplies and reference voltage to be provided.
5. as claim 2 or 3 described detecting voltage control device, it is characterized in that: described commutation circuit is made up of a driver and plural relay, this driver has plural input, it is connected with the output of microprocessor respectively, and output end of driver then is connected with the magnetizing coil of each relay respectively; Described relay comprises plural make and break contact respectively, and the make and break contact of each relay is connected between each electromagnetic switch of aforementioned switches group and the direct current power supply.
6. as claim 2 or 3 described detecting voltage control device, it is characterized in that: described each plural phase voltage detecting circuit is made up of a transformer, a bridge rectifier and an OP amplifier respectively, the primary side of this transformer connects with aforementioned power output end mutually respectively, obtains its voltage between phases respectively; The secondary side of transformer is connected with the input of bridge rectifier, and the phase voltage after step-down is rectified into direct voltage, delivers to the 0P amplifier again and carries out the signal amplification.
7. as claim 2 or 3 described detecting voltage control device, it is characterized in that: described multitask selects circuit to be made up of a microcontroller, a multiplexer and an amplifier, this microcontroller has a plurality of inputs and at least one output, this multiplexer has plural input, at least one output and a control end, the output of aforementioned each phase voltage detecting circuit is connected with the input of microcontroller and multiplexer respectively, and the control end of multiplexer is connected with the output of microcontroller again.
8. as claim 2 or 3 described detecting voltage control device, it is characterized in that: described microprocessor has plural input and plural output, wherein set up a variable resistor separately on two inputs, its another input is connected with aforementioned amplifier, each the phase voltage signal that is detected with reception.
9. as claim 1,2 or 3 described detecting voltage control device, it is characterized in that: described autotransformer is to be provided with three windings on an iron core, each winding has primary side and secondary side respectively, its primary side constitutes each phase power input of three phase mains respectively, its secondary side then respectively with one mutually power output end connect.
10. as claim 1,2 or 3 described detecting voltage control device, it is characterized in that: described autotransformer further sets up a temperature sensor separately on its each winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202561224U CN201750343U (en) | 2010-07-08 | 2010-07-08 | Voltage detection control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202561224U CN201750343U (en) | 2010-07-08 | 2010-07-08 | Voltage detection control device |
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| Publication Number | Publication Date |
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| CN201750343U true CN201750343U (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202561224U Expired - Fee Related CN201750343U (en) | 2010-07-08 | 2010-07-08 | Voltage detection control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414324A (en) * | 2013-07-29 | 2013-11-27 | 国家电网公司 | Low-voltage alternating-current and direct-current power source output device |
| CN108205107A (en) * | 2016-12-16 | 2018-06-26 | 陈锡瑜 | Make and break contact state examines showing device and method |
| CN110672983A (en) * | 2019-11-19 | 2020-01-10 | 国网福建省电力有限公司福州供电公司 | Power failure and restoration analysis and emergency repair method and management system |
-
2010
- 2010-07-08 CN CN2010202561224U patent/CN201750343U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414324A (en) * | 2013-07-29 | 2013-11-27 | 国家电网公司 | Low-voltage alternating-current and direct-current power source output device |
| CN108205107A (en) * | 2016-12-16 | 2018-06-26 | 陈锡瑜 | Make and break contact state examines showing device and method |
| CN110672983A (en) * | 2019-11-19 | 2020-01-10 | 国网福建省电力有限公司福州供电公司 | Power failure and restoration analysis and emergency repair method and management system |
| CN110672983B (en) * | 2019-11-19 | 2024-03-29 | 国网福建省电力有限公司福州供电公司 | Power failure recovery analysis and rush repair method and management system |
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