CN201408454Y - Power circuit breaker - Google Patents

Power circuit breaker Download PDF

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Publication number
CN201408454Y
CN201408454Y CN200920009246XU CN200920009246U CN201408454Y CN 201408454 Y CN201408454 Y CN 201408454Y CN 200920009246X U CN200920009246X U CN 200920009246XU CN 200920009246 U CN200920009246 U CN 200920009246U CN 201408454 Y CN201408454 Y CN 201408454Y
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CN
China
Prior art keywords
power circuit
circuit
circuit breaker
electromagnet
delay
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Ceased
Application number
CN200920009246XU
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Chinese (zh)
Inventor
祁贵云
王农
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ABB LV Installation Materials Co Ltd
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ABB LV Installation Materials Co Ltd
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Application filed by ABB LV Installation Materials Co Ltd filed Critical ABB LV Installation Materials Co Ltd
Priority to CN200920009246XU priority Critical patent/CN201408454Y/en
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Publication of CN201408454Y publication Critical patent/CN201408454Y/en
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Abstract

The utility model provides a power circuit breaker with a delay shunt trip function, which is used for monitoring the prepaid electric quantity through cooperating with an IC card prepayment meter, and comprises a tripping device and a signal processing device, wherein the tripping device comprises an electromagnet, and is used for activating the breaking switch of a power circuit by electromagnetic force, and the signal processing device is used for receiving the contact signal of the electric meter to control the electromagnet. When the prepaid electric quantity is used out, the power circuit breaker responds the contact signal of the electric meter to break the system power.

Description

Power circuit breaker
Technical field
The utility model relates to power circuit breaker.
Background technology
Along with deepening constantly of national grid transformation, this electric energy metrical of IC-card pre payment watthour meter and electric energy use-pattern are also more and more universal, and be with the miniature circuit breaker of time-delay shunt opening function also to obtain widespread use, this isolating switch generally includes a deciliter operating mechanism, arc quenching system, hot tripping system, magnetic tripping system.Country also has higher requirement to the security and the reliability aspect of electricity consumption simultaneously, according to relevant specification of country, to the equipment that is used for being connected, perhaps, new requirement is proposed at the EMC aspect of performance for guaranteeing the product of Electrical Safety purposes with low pressure public electric wire net or similar line facility.
Summary of the invention
The utility model is considered the requirement of above two aspects just and is proposed a kind of miniature circuit breaker that is used for the special-purpose band time-delay of IC-card pre payment watthour meter shunt opening function.
According to an aspect of the present utility model, a kind of power circuit breaker is provided, comprising: include the trip gear of electromagnet, be used for activating the power circuit switch by electromagnetic force; Signal processing apparatus is used to receive the watt-hour meter cue to control described electromagnet.
Preferably, described signal processing apparatus comprises: change-over circuit is used for converting described electric degree cue to an electric degree indicator signal; Driving circuit is used for driving described electromagnet according to described electric degree indicator signal.
Preferably, described driving circuit also comprises: delay circuit is used for the described electric degree indicator signal of time-delay output; Gate-controlled switch with control terminal, and described electromagnet is connected in series between described power circuit, this control terminal receive described electric degree indicator signal through time-delay to control the conducting of described gate-controlled switch.
According to isolating switch of the present utility model, can guarantee user's electricity consumption that can not exceed the quata, and before the user does not buy electric weight again, the maintenance power supply signal of watt-hour meter can not recover, so isolating switch also can not be closed.
According to a preferred version of the present utility model, described signal processing apparatus comprises and described electromagnet is connected in series mu balanced circuit between described power circuit.The EMC of this mu balanced circuit satisfies 4000V pulse train and surge voltage function.When this miniature circuit breaker when standing electromagnet phenomenons such as 4000V fast transient pulse train and surge voltage, after the process mu balanced circuit is handled these electromagnet phenomenons, isolating switch can safe and reliable work under these electromagnet phenomenon conditions, for the user provides more safe and reliable power utilization environment.And, utilize described electromagnet as inductance component, can stop high frequency interference source input signal treatment circuit to a certain extent, thereby improve the antijamming capability of signal processing circuit.
Description of drawings
Fig. 1 is according to the miniature circuit breaker theory diagram of band time-delay shunt opening function of the present utility model;
Fig. 2 is the change-over circuit figure in the miniature circuit breaker shown in Figure 1;
Fig. 3 is time-delay and the driving circuit figure in the miniature circuit breaker shown in Figure 1
Fig. 4 is the anti-jamming circuit figure in the miniature circuit breaker shown in Figure 1
Embodiment
[embodiment 1]
According to the structure of the embodiment of power circuit breaker of the present utility model as shown in Figure 1, comprising: disconnect 1 is connected between load and power lead N, the L, physically described load of connecting and disconnecting and power supply; Magnetic trip gear 2 with electromagnet DCT is by described disconnect 1 disjunction load and the power supply of electromagnet action triggers; Watt-hour meter cue line 3, thus can be external watt-hour meter obtain the cue of watt-hour meter; And signal processing circuit 4, receive the watt-hour meter contact signal by the CR port from signal wire 2, thereby control the electromagnet in the described magnetic trip gear 2.It should be noted that for simplicity's sake other parts such as the arc quenching system in the power circuit breaker etc. is not shown among the figure.
In the utility model; disconnect 1 can adopt existing techniques in realizing; for example shown in Figure 1; its inside comprises the bimetallic strip structure; can be for the user provide overload protection, promptly once power load when surpassing the ratings of regulation, isolating switch will be according to the actual size of load; at corresponding safety time internal cutting off load, guarantee the normal operation of distribution system.And the magnetic tripping system of this disconnect inside can provide short-circuit protection for the user, and promptly when the user power utilization system was short-circuited fault, isolating switch was guaranteed the normal operation of distribution system with disjunction faulty circuit immediately.
Watt-hour meter cue line 2 is connected between the CR port of outside watt-hour meter and signal processing circuit.When user in the watt-hour meter prestores electric weight when finishing using, pre payment watthour meter will be by the maintenance power supply signal cancellation of signal wire 2 with signal processing circuit 4, thereby guarantee user's electricity consumption that can not exceed the quata.In the present embodiment, signal processing circuit 4 mainly is made of following core electronic circuit: change-over circuit 41, delay driving circuit 42 constitute, wherein change-over circuit 41 converts the electric degree cue one electric degree indicator signal to and exports to delay driving circuit 42, and delay driving circuit 42 drives described magnetic trip gear according to this electric degree indicator signal and determines whether described load of disjunction and power supply.Be described in detail as follows respectively below:
Fig. 2 shows an example of change-over circuit 41, this circuit 41 is received the cue of watt-hour meter by the CR port, when operate as normal (when watt-hour meter prestores electric weight), make the CR port keep the power on signal noble potential by circuit 2, make optocoupler U1 input side light emitting diode anode potential be higher than cathode potential, thereby the light emitting diode of optocoupler U1 is in conducting state and luminous; Optocoupler U1 outgoing side phototriode receives the light of light emitting diode simultaneously, therefore is in conducting state, and the current potential of transistor collector and emitter is equal substantially.Because transistor emitter welding system ground, so the output end vo ut of change-over circuit 41 output keeps the electric degree indicator signal to the electronegative potential of user's power supply.
When buying electric weight, the user finishes using, watt-hour meter will be cancelled the output that keeps power on signal, promptly this moment, CR port current potential no longer was a noble potential, optocoupler U1 input side light emitting diode does not have electric current to flow through, thereby the optocoupler light emitting diode is in not luminance, optocoupler U1 outgoing side phototriode does not receive the light of light emitting diode and is in by state at this moment, and output end vo ut will export noble potential.
Fig. 3 illustrates the structure of time-delay and driving circuit 42, as shown in the figure, this circuit 42 mainly is made up of controllable silicon T1 and the integrator delay-time circuit (whether please examine this explanation accurate) that is made of resistance R 3 and C2, wherein the control terminal G of controllable silicon T1 is connected with the output end vo ut of change-over circuit 41, and resistance R 2, C3 are connected between described power lead L, the N and intermediate node is connected with change-over circuit Vout with described control terminal G.In addition, the electromagnet DCT of magnetic trip gear 2 and described controllable silicon T1 are connected between power circuit L, the N with series system, control the conducting of controllable silicon T1 by control terminal G, thereby drive described electromagnet DCT.
As shown in the figure, when watt-hour meter still has electric weight, i.e. the electric degree indicator signal of change-over circuit 41 output electronegative potentials as mentioned above, this moment is because the G terminal is in electronegative potential, so controllable silicon T1 is by not conducting, and electromagnet DCT is failure to actuate.When buying electric weight as the user and finish using, the electric degree indicator signal of described change-over circuit 41 output noble potentials, after the predetermined time-delay through delay circuit R3, C2, control terminal G becomes noble potential, thereby drive controllable silicon T1 conducting, drive magnetic DCT action is to trigger section breaker 1 disjunction load.
In the utility model, can adjust delay time according to actual needs by the delay circuit that resistance R 3 and capacitor C 2 are formed for main element, thereby time-delay provides drive signal to SCR control terminal G.In addition, can also stabilivolt ZD1 and filter capacitor C3 etc. be set at control terminal G and systematically in this example, controllable silicon is carried out pressure limiting and anti-interference protection.
[embodiment 2]
The difference of present embodiment and embodiment 1 is that described signal processing circuit 4 also comprises anti-jamming circuit.
As Fig. 1, shown in 4, this anti-jamming circuit mainly presses element voltage dependent resistor (VDR) YR1 and the electromagnet DCT as inductance element that is positioned at outside magnetic trip gear 2 to form by rationing the power supply, wherein said rationing the power supply presses element voltage dependent resistor (VDR) YR1 can physically be arranged within the signal processing circuit 4 and the external described electromagnet DCT of an end, the other end is connected to the power lead N for example between section breaker 1 and the load, is connected described power lead L thereby ration the power supply to press element voltage dependent resistor (VDR) YR1 and be connected on as the electromagnet DCT of inductance element, between the N and be positioned at a side of the close load of section breaker 1.
This anti-jamming circuit can make circuit breaker system stand surge voltage and the fast-pulse group does the time spent, press element YR1 that the circuit both end voltage is limited in the safe range by rationing the power supply, make isolating switch like this when standing electromagnet phenomenons such as 4000V fast transient pulse train and surge voltage, can reliably working.In addition, utilize inductance component can stop high frequency interference source input signal treatment circuit to a certain extent, thereby improve the antijamming capability of signal processing circuit.
More than introduced the features and advantages of the present invention by two embodiment, but be clear that for those skilled in the art, scheme of the present utility model is not limited to embodiment disclosed herein, but can openly make up and revise and do not break away from category of the present invention according to prior art knowledge and the present invention, scope of the present utility model is as the criterion with claims.

Claims (7)

1, a kind of power circuit breaker is characterized in that comprising:
The trip gear that includes electromagnet is used for the section breaker by electromagnetic force actuating power circuit;
Signal processing apparatus is used to receive the watt-hour meter cue to control described electromagnet.
2, power circuit breaker as claimed in claim 1 is characterized in that described signal processing apparatus comprises and described electromagnet is connected in series stable-pressure device between described power circuit.
3, power circuit breaker as claimed in claim 1 or 2 is characterized in that described signal processing apparatus comprises:
Change-over circuit is used for converting described electric degree cue to an electric degree indicator signal;
Driving circuit is used for driving described electromagnet according to described electric degree indicator signal.
4, power circuit breaker as claimed in claim 3, wherein said driving circuit also comprises:
Delay circuit is used for the described electric degree indicator signal of time-delay output;
Gate-controlled switch with control terminal, and described electromagnet is connected in series between described power circuit, this control terminal receive described electric degree indicator signal through time-delay to control the conducting of described gate-controlled switch.
5, power circuit breaker as claimed in claim 4 is characterized in that described change-over circuit comprises optocoupler.
6, power circuit breaker as claimed in claim 5 is characterized in that described gate-controlled switch is a controllable silicon.
7, power circuit breaker as claimed in claim 6 is characterized in that the integrating circuit of described delay circuit for being made of electric capacity and resistance.
CN200920009246XU 2009-01-19 2009-03-25 Power circuit breaker Ceased CN201408454Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200920009246XU CN201408454Y (en) 2009-01-19 2009-03-25 Power circuit breaker

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200920003678 2009-01-19
CN200920003678.X 2009-01-19
CN200920009246XU CN201408454Y (en) 2009-01-19 2009-03-25 Power circuit breaker

Publications (1)

Publication Number Publication Date
CN201408454Y true CN201408454Y (en) 2010-02-17

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ID=41002725

Family Applications (2)

Application Number Title Priority Date Filing Date
CN200920009246XU Ceased CN201408454Y (en) 2009-01-19 2009-03-25 Power circuit breaker
CNA2009101319032A Pending CN101510334A (en) 2009-01-19 2009-03-27 Power circuit breaker

Family Applications After (1)

Application Number Title Priority Date Filing Date
CNA2009101319032A Pending CN101510334A (en) 2009-01-19 2009-03-27 Power circuit breaker

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CN (2) CN201408454Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106996586A (en) * 2017-05-18 2017-08-01 浙江帅康电气股份有限公司 Fresh air linkage controller and the range hood using the linkage controller

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102693884B (en) * 2012-04-01 2014-12-10 上海诺雅克电气有限公司 Special molded case circuit breaker for prepayment electric energy meter
CN103995212B (en) * 2014-06-03 2017-02-01 北京翠祥电器元件有限公司 Disconnection monitoring system and method of electric energy metering device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106996586A (en) * 2017-05-18 2017-08-01 浙江帅康电气股份有限公司 Fresh air linkage controller and the range hood using the linkage controller
CN106996586B (en) * 2017-05-18 2023-07-28 浙江帅康电气股份有限公司 Fresh air linkage controller and range hood using same

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Publication number Publication date
CN101510334A (en) 2009-08-19

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C14 Grant of patent or utility model
GR01 Patent grant
C35 Partial or whole invalidation of patent or utility model
IW01 Full invalidation of patent right

Decision date of declaring invalidation: 20120424

Decision number of declaring invalidation: 18435

Granted publication date: 20100217