CN200956514Y - Safety power-utilization protector - Google Patents

Abstract

The utility model discloses a safe electric protector, which includes a regulator power supply circuit of the protector, a delay self-recovery fuse protection circuit, a leakage protection circuit and an executive relay. The device characterized in that the device includes an over-voltage, under-voltage protection circuit, an over-current protection circuit and high-voltage absorption circuit. Since the utility model is provided with the over-voltage, the under-voltage, the over-current protection circuits and the high-voltage absorption circuit, so the device not play a role of protection as creepage occurs, but also to protect electric equipment and protector when the power supply is unstable, instant short circuit and thunder occur, the device will play a role for the electric equipment and protector.

Description

A kind of safety electricity consumption protector

Technical field

The application belongs to power protector.

Background technology

In industrial and agricultural production and people life, be unable to do without electricity everywhere, therefore, electrical safety and the protection of electricity consumption facility become people pay much attention to and important problem.Because factors (especially rural area) such as artificial, natures, fault often appears and to the infringement of electricity consumption facility.The village that the designer lived for example, loose contact caused the circuit imbalance because of one time power transformation chamber neutral line break in 05 year, a phase voltage is raise cause more than 100 household electrical appliance to damage, and 200 three grades of power protectors are scrapped; In July, 06, because of being struck by lightning, cause the household electrical appliance of cover more than 120 to damage, 50 power protectors are scrapped.This shows that the dropout type earth leakage protective device that generally uses shields to power consumption equipment when products such as pulse self-resetting type protector just leak electricity at present, does not shield during to voltage superpressure, overcurrent, and power supply and protector self are not shielded yet.

Summary of the invention

The application's purpose relates to the safety electricity consumption protector that a kind of existing earth leakage protective has overvoltage, overcurrent protection function again.

The utility model comprises pressurizer power circuit, time-delay self-healed protection circuit, leakage protection circuit and the execution relay of existing protector, and its feature also comprises overvoltage, under-voltage protecting circuit, current foldback circuit and high pressure absorption circuit.Wherein:

Overvoltage, under-voltage protecting circuit are the transformer B at protector ₁On secondary coil L is arranged _1-3, secondary coil L _1-3The high pressure of induction or low-voltage signal amplify the inlet circuit that is connected to the time-delay self-healed protection through rectifying and voltage-stabilizing;

Current foldback circuit is to establish current transformer B on the phase line of protector ₂, B ₂Inferior coil-induced current signal is connected to the input of time-delay self-healed protection circuit through rectification, voltage stabilizing, amplification;

It is to be parallel with electric capacity carrying out on two phase lines that relay enters line that high pressure absorbs circuit, be used to absorb moment thunder and lightning and moment forceful electric power.

Absorb circuit owing to be provided with overvoltage, under-voltage, current foldback circuit and high pressure in the utility model circuit; so shield when not only leaking electricity; in the supply voltage shakiness, when using undesirable elements such as electric loading is excessive, instantaneous short circuit, thunder and lightning to take place, all power consumption equipment and protector itself are played a protective role.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

Embodiment

Can realize the application according to circuit configurations shown in Figure 1.Now its operation principle is described, so that the present techniques scheme is understood more.

Power transformer B ₁Secondary coil L ₂, diode D ₁-D ₄, capacitor C ₃, R ₂, regulator block IG ₁Constituted power supply stabilization circuit, L _1-2Above voltage is through rectifying and wave-filtering IG ₁Obtain the 12V direct voltage after the voltage stabilizing and use for late-class circuit, identical with common power circuit.

IG ₂, T ₁And auxiliary element constituted time-delay self-healed protection circuit, when electric leakage has appearred in circuit, and when overvoltage, under-voltage, over-current phenomenon avoidance, capacitor C ₅On voltage pass through R ₅Discharge rapidly, IG ₂Voltage on 3 pin is exported high potential rapidly.This high potential passes through R ₃Make T ₁Conducting executive component J ₁Adhesive, J ₁Normally-closed contact disconnect, output circuit is stopped power supply, when circuit recovers normal, the 12V direct voltage passes through R ₄, D ₆To C ₅Charging, the charging process process of promptly delaying time, time span is by R ₄C is worked as in decision ₅On voltage when being charged to certain value, IG ₂Voltage output low level on 3 pin, T ₁End J ₁Discharge J ₁The normally-closed contact closure, circuit restores electricity, relay J ₁Only adhesive when circuit breaks down, not adhesive under the normal condition greatly reduces entire circuit self power consumption, and this circuit is identical with existing leakage protection circuit.

Circuit inductance transformer B ₃, R ₁₀, ZR ₃, D ₉, T ₄, T ₅, T ₆, and auxiliary element constituted leakage protection circuit, when leaky occurring, in the annular core to close magnetic potential non-vanishing, when leakage current surpasses certain value, B ₃Secondary coil L ₃On voltage through R ₁₀, ZR ₃Dividing potential drop, D ₉Meet T ₄Base input end through T ₄, T ₅, T ₆Amplify and make T ₆Conducting.Capacitor C ₅On voltage pass through R ₅Discharge rapidly, IG ₂Voltage on 3 pin is rapidly high potential, and this high potential passes through B ₃Make T ₁Conducting, J ₁Normally-closed contact disconnect, output circuit is stopped power supply, and reaches earth leakage protective purpose, when leaky is removed, circuit recovers normal automatically through delaying time, and is identical with existing common leakage circuit protection.

Transformer B ₁Inferior coil L _1-3, R ₆, ZR ₁, D ₇, T ₂, T ₉, T ₈Reach auxiliary element and constituted overvoltage, under-voltage protecting circuit is when input voltage raises, at B ₁Secondary coil L _1-3On voltage will raise, when this voltage reaches set point (265V), will pass through R ₆ZR ₁Dividing potential drop, D ₇Make VZ ₁Puncture conducting T ₂Conducting.C ₅On voltage pass through R ₅, T ₂Discharge, the course of work after this is with the earth leakage protective process, thereby reached the purpose of overvoltage protection.When input was lower than set point (as: 160V), the A point voltage decreased, T ₇Base voltage also decreases, as the low T that arrives ₇Cut-ff voltage the time (0.6), T ₇End T ₇Collector electrode become high potential, this high potential passes through R ₇Make T ₈Conducting, C ₅On voltage pass through R ₅Discharge, the course of work after this is identical with existing earth leakage protective circuit.

Current transformer B ₂, R ₈, ZR ₂, D ₈, VZ ₂, T ₃And auxiliary element constituted current foldback circuit, when short circuit appears in output circuit (electricity consumption facility), during over-current phenomenon avoidance, at B ₂Inferior coil L ₂On voltage will raise, when being elevated to set point, this voltage is through R ₈ZR ₂Dividing potential drop, D ₈, VZ ₂, meet T ₃Base stage make T ₃Conducting, C ₅On voltage pass through R ₅, T ₃Discharge, the course of work after this is with existing earth leakage protective process.C ₈Be current absorption electric capacity, the big electric current when absorbing the inductive load starting is unlikely making T ₃The moment conducting causes J ₁Action makes circuit more stable.

J ₁Be executive component, J ₁Adopt highly sensitive high-power (rated current 40A) direct current relay.

Knob SB, resistance R ₁₅Constituted hookup.

R ₁, LED ₁Constituted power indicating circuit; R ₁₆, LED ₂Constituted two and made indicating circuit.

C ₁, C ₂The instantaneous pressure absorption circuit, as thunder and lightning or moment during forceful electric power, part voltage is by C ₁, C ₂Absorb, thereby protected the operate as normal of electricity consumption facility and protective circuit.

Therefore the entire circuit element is installed in the fire-retardant seal box, all elements do not have heater element, can not stay louvre, rainproof protection against the tide, can be installed in outdoorly, transformer B adopts big voltage range transformer, does not generate heat under the normal operating conditions, the overcurrent instrument transformer adopts superconductive magnet ring shape electricity iron core, the efficient height, in light weight, volume is little, leakage current transformer is with crossing current transformer.

Former device model parameter is as follows during enforcement:

T ₁-T ₈Be 9014, D ₁-D ₁₁Be 1N4007.

C ₁Model is selected the small-sized electric capacity of MVG10 471 type high pressure for use.

C ₂Model is selected CBB62A, 1.275VAG for use.

C ₃, C ₅Be 1000 ч F25V electrochemical capacitors, C ₄Select 1000 ч F/25V electric capacity for use.

C ₆Be 47 ч F/50V electrolysis, C ₇Be 104, C _SBe 220 ч F/25V electrolytic capacitors.

C ₉Be 10 ч F/25V electrolysis, C ₁₀, C ₁₁Be 104 ceramic disc capacitors.

VZ ₁, VZ ₂Select for use and puncture 4.3V, 0.5 voltage stabilizing didoe.

IC selects method 7812 integrated package of pressure-stabilizing for use, and IC selects the NE555 time-base circuit for use.

R ₁, R ₁₆Choosing value 5.6K R ₂Choosing value 1W500 Ω, R ₃, R ₇, R ₁₂, R ₁₄, choosing value 1K, R ₄Choosing value 51K, R ₅Choosing is worth 200 Ω, R ₆, R ₈, R ₁₀, choosing value 3K, R ₇, R ₁₁, choosing value 56K; R ₉, R ₁₃, choosing value 30K, R15, choosing value 5K2W, ZR ₁, ZR ₂, ZR ₃, ZR ₄, select the small-sized variable resistor of 22K for use.

Claims (1)

1, a kind of safety electricity consumption protector, it comprises pressurizer power circuit, time-delay self-healed protection circuit, leakage protection circuit and the execution relay of existing protector, its feature also comprises overvoltage, under-voltage protecting circuit, current foldback circuit and high pressure absorption circuit; Wherein:

Overvoltage, under-voltage protecting circuit are the transformer (B at protector ₁) on secondary coil (L is arranged _1-3), secondary coil (L _1-3) high pressure of induction or low-voltage signal is connected to the time-delay self-healed protection through the rectifying and voltage-stabilizing amplification inlet circuit;

Current foldback circuit is to establish current transformer (B on the phase line of protector ₂), (B ₂) inferior coil-induced current signal is connected to the input of time-delay self-healed protection circuit through rectification, voltage stabilizing, amplification;

It is to be parallel with electric capacity carrying out on two phase lines that relay enters line that high pressure absorbs circuit, be used to absorb moment thunder and lightning and moment forceful electric power.

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