CN207382650U - On-load tap changers of transformers controller - Google Patents

Abstract

The utility model discloses a kind of on-load tap changers of transformers controllers, solving needs lighting device to be illuminated to check the content on controller panel, its key points of the technical solution are that, backlight is equipped between housing and glass cover-plate, personnel's detection device and light detection means are additionally provided on housing, it is also coupled to be useful for the control circuit that it is controlled to open and close on backlight, control circuit is in response to personnel's detection device with light detection means backlight to be controlled to open and close；When personnel's detection device detects that someone is located at before housing and light detection means detect that extraneous intensity of illumination is low, control circuit starts backlight, the on-load tap changers of transformers controller of the utility model, controller can be illuminated by backlight, it will not there is a situation where reflective, and only can just start at night and in the case of someone, effectively avoid the waste of electric energy.

Description

On-load tap changers of transformers controller

Technical field

The utility model is related to control device for transformer, more particularly to on-load tap changers of transformers controller.

Background technology

The arc quenching method of existing on-load tap changers of transformers has vacuum extinction, oil immersion arc extinguishing and air blowout, in the market The most common are air blowout dry-type transformer load ratio bridging switches, usually by corresponding controller transformer are controlled to have load Tap switch realizes the adjusting of voltage.

Have on the panel of controller and current voltage condition, gear stages, voltage sensibility situation etc. information are carried out It has been shown that, can understand current working voltage situation by the panel for observing controller.In order to facilitate electrical equipment with And the understanding of electric power thus supplied, so staff is needed at interval of patrolling after a period of time, the electricity under the time residing for understanding Pressure situation etc.；And to evening, it is necessary to which staff holds the panel of lighting apparatus irradiation controller to check required letter Breath, and there is transparent glass cover board on the panel of controller, thus lighting apparatus be present in irradiation process it is reflective, to checking Bring some inconvenient, so with certain room for improvement.

Utility model content

The purpose of this utility model is to provide on-load tap changers of transformers controller, staff close to when it is automatic Backlight is lighted so that staff to be facilitated to read required information.

The above-mentioned technical purpose of the utility model technical scheme is that：

A kind of on-load tap changers of transformers controller, it is described including housing and the glass cover-plate being arranged on housing Backlight is equipped between housing and glass cover-plate, is additionally provided on the housing for detecting whether there are personnel to be located at before housing and defeated Go out personnel and detect personnel's detection device of signal and the light for detecting extraneous intensity of illumination and output light detection signal Detection device is also coupled on the backlight be useful for the control circuit that it is controlled to open and close, and the control circuit is coupled to personnel Detection device detects signal with light detection signal so that backlight to be controlled to open and close with light detection means and in response to personnel；Work as people When member's detection device detects that someone is located at before housing and light detection means detect that extraneous intensity of illumination is low, the control electricity Road starts backlight.

Using the above program, the data of some on housing can be believed by being arranged on the backlight between housing and glass cover-plate Breath is illuminated, and ensures also see when evening clear, while is also effectively avoided staff and is needed to provide hand for oneself The trouble of torch further avoids and situation that is reflective and being not easy to check data message is caused in flashlight irradiation process； According to personnel's detection device and light detection means come to whether someone and ambient intensity are detected, only in shell When detecting someone before body while during the state in evening, backlight can be just automatically opened, needs to switch without staff Etc. modes, reduce inspection workload and work it is more convenient.

Preferably, there are two the backlight settings, and it is respectively arranged at the both sides of housing upper.

Using the above program, the setting of two backlights so that light is more uniform, and staff is facilitated to check that data are believed Breath.

Preferably, personnel's detection device is pyroelectric infrared sensor.

Using the above program, itself radiation is not sent out any kind of, device power consumption very little, good concealment is cheap, resists Interference is strong；Detector is mounted on using highly for recommendation, to the toy on ground in investigative range, does not generate report generally It is alert；The anti-electromagnetic wave jamming performance of detector, which meets 4.6.1 requirements, general mobile phone electromagnetic interference in GB10408, will not cause mistake Report；Detector irradiates in the range of normal sensibility, by 3 meters of outer H4 halogen lamp through glass, does not generate alarm；Infrared heat It is very big also with the direction of motion relation of people to the sensitivity of human body to release electric transducer, infrared ray pyroelectric sensor is for radially Mobile response is least sensitive, and for transverse direction（Direction i.e. vertical with radius）It is mobile then most sensitive, it selects at the scene Suitable installation site is to avoid infrared probe wrong report, acquire the particularly important ring of optimum detection sensitivity.

Preferably, the light detection means include detecting the light of ambient intensity and output light signal It detection circuit and is preset with light benchmark value signal and is coupled to light detection circuit with by light signal and light a reference value Signal is compared to each other with the comparison circuit of output light detection signal；It is described if light signal is less than light benchmark value signal The light detection signal of comparison circuit output high level；Conversely, the comparison circuit exports low level light detection signal.

Using the above program, light benchmark value signal corresponds to the light intensity in evening, i.e., only detects signal in light The light detection signal of a high level can be just exported when less than light benchmark value signal, is realized to extraneous light intensity Detection, it is more convenient.

Preferably, the control circuit is examined including being coupled to personnel's detection device with light detection means with reception staff Signal is surveyed to detect signal with light and export with the AND gate circuit of gate signal and in response to gate signal backlight being controlled to open The driving circuit closed.

Using the above program, can be completed with door two condition phases and function, i.e., only there are two condition meet when Hou Caihui exports the signal of a high level, convenient for the design of subsequent drive circuit so that circuit design is more simple, easily Implement.

Preferably, the driving circuit includes triode and relay, the base stage of the triode is connected to and door electricity The output terminal on road, the collector of the triode connect power supply, the emitter of the triode after being connected to the coil of relay Ground connection, the normally opened contact of the relay are connected to the current supply circuit of backlight.

Using the above program, the setting of triode and relay so that circuit is more simple easy to implement, passes through three poles Pipe realizes break-make control as switching device, and relay is with regard to controlling the current supply circuit of backlight as executive component.

Preferably, also inverse parallel has fly-wheel diode on the coil of the relay.

Using the above program, the antiparallel fly-wheel diode of institute on the coil of relay, can will remain in relay Aftercurrent on coil is consumed, the effective service life improved relay and used.

Preferably, the control circuit, which further includes, is controlled by driving circuit with the time delayed turn-off electricity of time delayed turn-off backlight Road.

Preferably, the time delayed turn-off circuit include be controlled by driving circuit and export time delayed signal delay portion and In response to time delayed signal with the cutting portion of the current supply circuit of cut-out backlight after default delay time.

Using the above program, if the setting of time delayed turn-off circuit effectively avoids staff and walks up and down before housing The situation moved and backlight is caused constantly to open and close so that as long as backlight starts, it is maintained in starting state for a period of time, It is turning off afterwards, is ensureing the service life of backlight.

Preferably, the delay portion is 555 delay circuits.

Using the above program, the design of 555 delay circuits is simple, and easy to implement, facilitates designer to subsequent conditioning circuit Design, and of low cost, later maintenance is simple.

In conclusion the utility model has the advantages that：Controller can be illuminated by backlight, Will not be there is a situation where reflective, and only can just start at night and in the case of someone, effectively avoid the waste of electric energy.

Description of the drawings

Fig. 1 is the structure diagram of on-load tap changers of transformers controller；

Fig. 2 is the circuit diagram of on-load tap changers of transformers controller.

In figure：1st, housing；2nd, glass cover-plate；3rd, backlight；4th, personnel's detection device；5th, light detection means；51st, light Detection circuit；52nd, comparison circuit；6th, control circuit；61st, AND gate circuit；62nd, driving circuit；63rd, time delayed turn-off circuit；631、 Delay portion；632nd, cutting portion.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

This specific embodiment is only explanation to the utility model, is not the limitation to the utility model, ability Field technique personnel can as needed make the present embodiment the modification of no creative contribution after this specification is read, but As long as it is all protected in the right of the utility model be subject to Patent Law.

Embodiment：A kind of on-load tap changers of transformers controller, as shown in Figure 1, including housing 1 and being arranged at housing Glass cover-plate 2 on 1, the upper surface of housing 1 have corresponding data message, and data message includes voltage, gear, pressure sensitive Degree, delay time, reference voltage, action frequency, manner of execution etc.；Backlight 3, backlight are equipped between housing 1 and glass cover-plate 2 There are two lamp 3 is set, and it is respectively arranged at the both sides on 1 top of housing.

As shown in Fig. 2, it is additionally provided on housing 1 for detecting whether thering are personnel to be located at before housing 1 and exporting personnel's detection letter Number personnel's detection device 4 and for detect extraneous intensity of illumination and output light detection signal light detection means 5, the back of the body It is also coupled to be useful for the control circuit 6 that it is controlled to open and close on light lamp 3, control circuit 6 is coupled to personnel's detection device 4 and examines with light It surveys device 5 and detects signal with light detection signal in response to personnel so that backlight 3 to be controlled to open and close；When personnel's detection device 4 is examined It measures someone to be located at before housing 1 and when light detection means 5 detect that extraneous intensity of illumination is low, control circuit 6 starts backlight 3。

Personnel's detection device 4 is pyroelectric infrared sensor, and is arranged on the front side of housing 1, before convenience is to being located at shell Whether someone is detected for side.Pyroelectric infrared sensor includes shell, optical filter, field-effect tube and pyroelectricity element, outside Shell is equipped with through hole, and optical filter is connected in through hole, and field-effect tube and pyroelectricity element are located at pyroelectric infrared sensor Enclosure, and external heat radiation is sensed by optical filter.The main function of optical filter is only to allow wavelength on 10 μm of left sides Right infrared ray (IR wavelength that human body is sent) is by and filtering light, sunlight and other radiation, to inhibit the external world Interference.Infrared induction source is usually made of two pyroelectricity elements in series or in parallel, the electricity of the two pyroelectricity elements Pole is on the contrary, ambient background radiation almost plays an important role of two pyroelectricity elements identical, to generate it pyroelectric effect phase It mutually offsets, output signal is close to zero.Once in someone's intrusion detection region, human infrared radiation is focused on by partial mirror, And received by pyroelectricity element, since angle is different, the heat that two panels pyroelectricity element receives is different, and pyroelectricity energy is not yet Together, it is impossible to be completely counterbalanced by, control signal is exported after processing circuit processes.Pyroelectric effect is similar with piezoelectric effect, refer to by In the variation of temperature causes plane of crystal charge the phenomenon that.Pyroelectric infrared sensor is by ceramic oxide or piezo crystals volume elements Part forms, and electrode is made on two surfaces of element, when temperature has the variation of △ T in the range of Sensor monitoring, pyroelectric effect Charge △ Q can be generated on two electrodes, i.e., generate a faint voltage △ V between electrodes.Due to its output impedance High, there are one field-effect tube in the sensor to carry out impedance conversion.Charge △ Q can be by air caused by pyroelectric effect Ion with reference to and disappear, i.e., when ambient temperature-stable is constant, △ T=O, sensor is without output.Human body or volume are larger Animal have constant body temperature, generally at 37 degree, so the infrared ray of 10 μm or so of specific wavelength can be sent, when human body enters Detection zone, because human body temperature and environment temperature have difference, 10 μm or so of infrared ray of human-body emitting is filtered by Fresnel lens It is gathered after mating plate enhancing in infrared induction source (pyroelectricity element), infrared induction source will when receiving human infrared radiation Charge balance is lost, outwards discharges charge, and then generates △ T and circuit output, subsequent conditioning circuit are handled after testing to the periphery by △ T Afterwards signal is detected with regard to personnel can be generated.

Light detection means 5 include detecting the light detection circuit 51 of ambient intensity and output light signal with And it is preset with light benchmark value signal and is coupled to light detection circuit 51 so that light signal and light benchmark value signal is mutual Compare with the comparison circuit 52 of output light detection signal.

Light detection circuit 51 includes photo resistance RG and divider resistance R12, photo resistance RG and divider resistance R12 phases Mutually the connecting node of series connection and the two sentences output light signal；I.e. when extraneous intensity of illumination change is strong, the resistance of photo resistance Value reduces, and light signal increases at this time；When extraneous intensity of illumination weakens, the resistance value of photo resistance increases, and light is believed at this time Number reduce.

Comparison circuit 52 is preferably the comparator of LM393A models, and the end of oppisite phase of comparison circuit 52 is connected to photo resistance RG Connecting node between divider resistance R12 is to receive light signal, and in-phase end is connected with to set and light regulating benchmark The reference value circuit of value signal；Reference value circuit includes the resistance R22 being serially connected and slide rheostat R21, electricity The in-phase end for hindering the connecting node between R22 and slide rheostat R21 and comparator connects, by the light signal detected and light Line benchmark value signal is compared to each other, and exports corresponding light detection signal；If light signal is less than light benchmark value signal, Comparison circuit 52 exports the light detection signal of high level；Conversely, comparison circuit 52 exports low level light detection signal.

Control circuit 6 includes being coupled to personnel's detection device 4 with light detection means 5 with reception staff's detection signal and light Line detects signal and exports with the AND gate circuit 61 of gate signal, in response to controlling the driving electricity that backlight 3 opens and closes with gate signal Road 62 and it is controlled by driving circuit 62 with the time delayed turn-off circuit 63 of time delayed turn-off backlight 3.

AND gate circuit 61 preferably multi input and door, the output terminal of personnel's detection device 4 and the output of light detection means 5 End is all connected to the input terminal with door, and driving circuit 62 is connected to the output terminal of door.

Driving circuit 62 includes the triode Q1 and relay KM1 of NPN type, and the base stage of triode Q1 is connected to AND gate circuit 61 output terminal, the collector of triode Q1 connect power supply after being connected to the coil of relay KM1, and the emitter of triode Q1 connects Ground, the normally opened contact of relay KM1 are connected to the current supply circuit of backlight 3；Also inverse parallel has afterflow on the coil of relay KM1 Diode D1.

When the personnel that AND gate circuit 61 receives high level detect signal with light detection signal, the output of AND gate circuit 61 one A high level with gate signal to triode Q1, triode Q1 conductings, the coil of relay KM1 obtains electric, and relay KM1's is normally opened Contact closure is to start backlight 3.

Time delayed turn-off circuit 63 include be controlled by driving circuit 62 and export time delayed signal delay portion 631 and in response to Time delayed signal is with the cutting portion 632 of the current supply circuit of cut-out backlight 3 after default delay time.

Delay portion 631 is 555 delay circuits, and the controlled end in delay portion 631 is coupled to the normally opened contact of relay KM1,555 The controlled end of delay circuit is power end, therefore the normally opened contact of relay KM1 is connected between power supply and 555 chips, works as relay When the normally opened contact of device KM1 is closed, then 555 delay circuit electric energy are provided, after circuit is connected with the mains, since capacitance C1 has little time It charges, two feet and six feet of 555 delay circuits are in low level, the high level of three feet output at this time；With the charging of capacitance C1, Two feet of 555 delay circuits are begun to ramp up with six foot current potentials, when two foot current potentials rise to 2/3 Vcc, the shape of three feet output State is overturn, and three feet are become low level from high level and are always maintained at down.

Cutting portion 632 includes the triode Q2 and relay KM2 of NPN type, and the base stage of triode Q2 is connected to 555 delays electricity The output terminal on road, the collector of triode Q2 are connected to the coil of relay KM2, emitter ground connection, and the normally opened of relay KM2 touches Point is connected to the normally opened contact both ends of relay KM1.

The normally opened contact of relay KM1 is closed so that delay portion 631 starts, so as to export the delay letter of a high level It number turns on to triode Q2, triode Q2, the coil of relay KM2 obtains electric, and the normally opened contact of relay KM2 is closed, at this point, such as Fruit staff leaves, and since the normally opened contact of relay KM2 is closed so still maintaining 3 illuminating state of backlight, passes through Default delay time, the time delayed signal that delay portion 631 is exported become low level from high level, then triode Q2 is disconnected, The coil losing electricity of relay KM2, the normally opened contact of relay KM2 disconnects, so as to fulfill the function of delay cutoff backlight 3.

Specific work process is as follows：

When light detection means 5 detect the external world at night, i.e., light signal is less than light benchmark value signal；Meanwhile There is staff close to controller so that personnel's detection device 4 has detected that personnel are located at 1 front of housing, so as to distinguish with door It receives the light detection signal of two high level and personnel detects export high level after signal and gate signal, control circuit 6 In response to high level with gate signal backlight 3 to be controlled to start, while also start-up study breaking circuit 63；By default After delay time, backlight 3 is automatically shut down.

Claims (10)

1. a kind of on-load tap changers of transformers controller, including housing (1) and the glass cover-plate being arranged on housing (1) (2), it is characterized in that：Backlight (3) is equipped between the housing (1) and glass cover-plate (2), use is additionally provided on the housing (1) It is located at before housing (1) in the personnel that detect whether and exports personnel and detects personnel's detection device (4) of signal and for detecting Extraneous intensity of illumination and output light detect the light detection means (5) of signal, are also coupled to be useful for controlling on the backlight (3) The control circuit (6) of its keying is made, the control circuit (6) is coupled to personnel's detection device (4) and light detection means (5) simultaneously Signal is detected with light detection signal in response to personnel so that backlight (3) to be controlled to open and close；When personnel's detection device (4) has detected When people is located at before housing (1) and light detection means (5) detect that extraneous intensity of illumination is low, the control circuit (6) starts the back of the body Light lamp (3).

2. on-load tap changers of transformers controller according to claim 1, it is characterized in that：The backlight (3) is set There are two, and it is respectively arranged at the both sides on housing (1) top.

3. on-load tap changers of transformers controller according to claim 1, it is characterized in that：Personnel's detection device (4) it is pyroelectric infrared sensor.

4. on-load tap changers of transformers controller according to claim 1, it is characterized in that：The light detection means (5) include detecting the light detection circuit (51) of ambient intensity and output light signal and being preset with light benchmark Value signal and light detection circuit (51) is coupled to being compared to each other light signal and light benchmark value signal with output light Detect the comparison circuit (52) of signal；If light signal is less than light benchmark value signal, comparison circuit (52) output is high The light detection signal of level；Conversely, the comparison circuit (52) exports low level light detection signal.

5. on-load tap changers of transformers controller according to claim 1, it is characterized in that：Control circuit (6) bag It includes and is coupled to personnel's detection device (4) and light detection means (5) signal and light detection signal and defeated are detected with reception staff Go out with the AND gate circuit of gate signal (61) and in response to controlling the driving circuit (62) that backlight (3) opens and closes with gate signal.

6. on-load tap changers of transformers controller according to claim 5, it is characterized in that：Driving circuit (62) bag Triode and relay are included, the base stage of the triode is connected to the output terminal of AND gate circuit (61), the current collection of the triode Pole connects power supply, the emitter ground connection of the triode after being connected to the coil of relay, and the normally opened contact of the relay connects It is connected to the current supply circuit of backlight (3).

7. on-load tap changers of transformers controller according to claim 6, it is characterized in that：On the coil of the relay Also inverse parallel has fly-wheel diode.

8. on-load tap changers of transformers controller according to claim 5, it is characterized in that：The control circuit (6) is also Including being controlled by driving circuit (62) with the time delayed turn-off circuit (63) of time delayed turn-off backlight (3).

9. on-load tap changers of transformers controller according to claim 8, it is characterized in that：The time delayed turn-off circuit (63) include being controlled by driving circuit (62) and export the delay portion (631) of time delayed signal and in response to time delayed signal to pass through The cutting portion (632) of the current supply circuit of backlight (3) is cut off after default delay time.

10. on-load tap changers of transformers controller according to claim 9, it is characterized in that：The delay portion (631) is 555 delay circuits.