CN201374544Y

CN201374544Y - Heavy-current limiting and low-current controlling relay

Info

Publication number: CN201374544Y
Application number: CN200920007721U
Authority: CN
Inventors: 兰如根
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-18
Filing date: 2009-02-18
Publication date: 2009-12-30
Anticipated expiration: 2019-02-18

Abstract

A heavy-current limiting and low-current controlling relay is capable of sensing load fluctuation and can be used for adjusting and controlling output power range so as to achieve the purpose of power restriction and shutoff. The relay comprises a casing, a self-locking switch with a relay, a power supply circuit, a mutual inductor, an overflow control circuit, a low power output detecting circuit and a delay control circuit used during an initiating process, as well as an indicator light, a main-control output end, a controlled output end and the like. The circuit is characterized in that when a main-control electric appliance is used, the main-control output end is connected in series with the mutual inductor to sense the power level of the output power, a potentiometer is used for differential pressure adjustment, a resistor-capacitor unit buffers, and the initiation control circuit is switched; when the current is heavy, overflow control is adopted, the power supply is cut off, and the current limiting effect can be adjusted; when the current is low, standby and shutdown elimination control is adopted; and when the electrical appliance used for mainly controlling the output is under states of standby and shutdown and the detected output current is lower than a setting value, the circuit is shut off, thereby playing the effect of eliminating energy waste for standby. A peripheral electrical appliance is connected with the controlled output end and has nothing to do with the power level of the electrical appliance at the main-control output end. When heavy-current limiting and low-current controlling is performed, all power supplies are automatically shut off, and zero power dissipation and energy conservation are achieved. The heavy-current limiting and low-current controlling relay is simple, safe and practical, and is easy to popularize.

Description

The little electricity-limiter of the big control of limit

Technical field:

The utility model belongs to the electronic product field, relates to a kind of device of rationing the power supply, energy perception load variations, and the electric output power magnitude range is used in control, and reaching rations the power supply turn-offs a kind of device of purpose.

Background technology:

1. circuit is crossed flow short-circuit and is caused the accident too much, and during people's electricity consumption, and custom allows electric appliance standby, and power consumption influences appliance life, even leads to a disaster.Power consumption during for the elimination standby is avoided long-time energising, influences appliance life, can not forget unplugg after most electrical equipment use up, and cuts off AC power, and frequent plug, not only trouble is more aggravated loose contact, the damage plugs and sockets, and influence is used.

2. find existing electricity-limiter circuit complexity, function singleness, the cost height, safeguard difficult, be not easy to promote.

Summary of the invention:

The utility model purpose is to provide a kind of cutoff device of the control of rationing the power supply, control electricity consumption magnitude range, and can adjusting, can preset when output overcurrent, the disconnected protection of automatic AC complete shut-down.And the electrical appliance standby of output or when shutdown, when detecting output current less than setting, circuit automatically shuts down, and carries out the zero-power Energy Saving Control.

The utility model is achieved through the following technical solutions: a kind of cutoff device of the control of rationing the power supply comprises housing, tape relay self-lock switch, power circuit, instrument transformer is crossed current control, the delay circuit when detection of output small-power and startup, indicator light, master control., composition such as controlled output.

1, master control output instrument transformer L 7. ₁, the size of induction power output, electric current was greatly then made current control (the adjustable effect of rationing the power supply).Electric current is little then to be made and eliminates the control of standby complete closedown, and the output current of detection is during less than setting value, and breaking circuit plays the standby power consumption effect of eliminating.Both have synthesized the controller of electric power magnitude range.

2. 8. peripheral hardware electrical equipment accept the control output, starts along with the application of the electrical equipment of master control output, turn-offs after the shutdown standby along with the electrical equipment of master control output and and then turn-off, irrelevant with the watt level of the electrical equipment of master control output.

Description of drawings:

Fig. 1 is the utility model electricity-limiter structure chart.

Fig. 2 exceeds and controls little electricity-limiter circuit diagram greatly.

(1) cross current control: (the adjustable effect of rationing the power supply)---go out the detection control above predetermined power.

Use transformer L₁The voltage of induction is through adjustable resistance W₂Dividing potential drop, D₂Rectification, R₂、C ₂Resistance is slow, controls MCR₂Conducting, J₁Get electric adhesive, the self-lock switch self-unloading discharges, and cuts off the electricity supply. Output can be opened the control outage greater than 40W load (resistive). As: connect When motor draws water, first preset adjustable resistance W₂Circuit shutoff, water pumper are shut down, and the overcurrent guarantor is done in the anti-certain drift angle of adjustable resistance of transferring again Protect the position. Such as reasons such as motor rotation blockages output current is increased, and overcurrent turn-off function, stoppage protection. As long as output loading becomes heavy or short circuit The time, circuit is protected with regard to auto-breaking.

(2) eliminate the control of standby complete closedown:---output detects control less than predetermined power.

After the electrical equipment shutdown standby 7. of master control output, master control. the transformer L of output₁, respond to diminishing of power output, the voltage of induction is also little, W₁Dividing potential drop gained voltage ratio light emitting diode D₅Pressure drop little, Q₁Not conducting, power supply is through R₁Make controllable silicon MCR₁The potential rise of the control utmost point, controlled silicon conducting, J₁Get electric adhesive, the self-lock switch self-unloading discharges, and cuts off the electricity supply. Main Control electrical equipment, controlled peripheral hardware electrical equipment and this installation's power source all turn-off, and realize that zero-power is energy-conservation.

After the shutdown of: TV remote, after the computer program shutdown, the diminishing of master control output power output, circuit control power remove, Eliminate main frame and peripheral hardware electric appliance standby power consumption, circuit close have no progeny into zero-power energy-conservation.

Embodiment:

As shown in Figure 2, the utility model device of rationing the power supply:

K ₁Be tape relay self-lock switch, K ₂Touch switch for one group in the tape relay, start K ₁The time, touch K switch ₂Interlock, the power supply of 12V is through K ₂And R ₅To capacitor C ₅Charging makes Q ₁Conducting, the time-delay certain hour waits to start the back condenser, keeps and connects output.During startup, because the testing circuits such as instrument transformer of output do not form control as yet, by R ₄, R ₅, C ₅Form and start delay circuit.After the time-delay, again by testing circuit control break-make.

Instrument transformer L ₁Select the instrument transformer in Lou protecting for use, master control output line string encloses around 1-5, and during electrical work, it forms voltage, and one the tunnel through W ₂Overcurrent protection is done in dividing potential drop preset.Another road is through W ₁Dividing potential drop is adjusted, C ₄, R ₃Buffering, D ₅Control is opened in detection, makes Q ₁Conducting, controllable silicon MCR ₁The control utmost point be electronegative potential, circuit is kept conducting.Light-emitting diode D ₅Play to detect and open control and indicative function, its pressure drop is between the 1.5-2.6V, output can be opened the conducting of control holding circuit greater than 50W load (resistive).D ₅Be loaded on panel, it is more eye-catching to choose five lis of transparent diodes that glow, D ₃, D ₄Clamper protection MCR ₁Effect, C ₃Anti-false triggering.Transformer T ₁, choose power and be not less than

W, the transformer of secondary output 12V.Controllable silicon is MCR100-6, Q ₁Be NPN type C945.FU is a protective tube, D ₆Be power supply indicator.

The electricity-limiter cost is low, can adjust to limit the electric power magnitude range, and overcurrent turn-offs, the electrical equipment machine power consumption of waiting a little while,please, and the big control of limit is little, the disconnected protection control of complete shut-down.Safe, practical, easy popularization.

Claims

1, the little electricity-limiter of the big control of a kind of limit, energy perception load variations can be adjusted control and use the electric output power magnitude range, and reaching rations the power supply turn-offs a kind of device of purpose; Its circuit feature is: comprise housing, tape relay self-lock switch, power circuit, instrument transformer, the delay control circuit when crossing current control, the detection of output small-power and startup, indicator light, compositions such as master control, controlled output; Power supply is connected in executive circuit by the power supply of transformer step-down rectifier filtering, is connected in the silicon controlled control utmost point that the output small-power detects control through resistance, and the touch switch of another road in the tape relay self-lock switch is connected in delay circuit; The master control electrical output terminal seals in instrument transformer, the size of secondary induction power output, and one the tunnel through the adjustment of potentiometer dividing potential drop, and the Resistor-Capacitor Unit buffering opens the control controllable silicon through diode, and the controllable silicon anode connects relay coil, does overcurrent protection; Another road is adjusted through the potentiometer dividing potential drop, the Resistor-Capacitor Unit buffering, and light-emitting diode detects and opens control and indication, detection control signal for triode amplification conducting is connected in the SCR control utmost point, and little two the controllable silicon anodes of the big control of limit also connect, be connected in the execution relay coil, the control circuit break-make; Peripheral hardware electrical equipment is accepted the control output.