CN2041080U

CN2041080U - Multifunction combination safety cut-out

Info

Publication number: CN2041080U
Application number: CN 87215531
Authority: CN
Inventors: 李欣建
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-11-10
Filing date: 1987-11-10
Publication date: 1989-07-12

Abstract

The utility model discloses a multifunction combination safety protector which can have an effective integrity protection under all abnormal situations when domestic appliances jeopardize the personal safety. The multifunction combination safety protector has functions of electric leakage protection, overload protection (repeatedly used as a fuse and a current limiter), under-voltage protection, over-voltage protection, momentary power failure protection, power recovery delaying and large-capacity switching, and the automatic resetting time and the automatic delaying time are selective (the general protection is 30 seconds and the refrigerator protection is 5 minutes). For the original design, the multifunction combination safety protector can realize low cost and simple and reliable circuit based on multi-function, so the multifunction combination safety protector has extrusive advantages compared with other products.

Description

Multifunction combination safety cut-out

The multifunctional comprehensive protector is the device that is used to protect personal safety and power consumption equipment safety in the electric power system.

Electrical Safety protection work is along with popularizing day by day of household electrical appliance become more and more important; though electric leakage protector, the refrigerator protector of various a multitude of names have appearred in China; but these circuit all are to move to one or two kind of abnormal conditions that power consumption equipment takes place, and can not carry out comprehensive integrated protection to all anomalies.And some can make the senior protector of integrated protection because of complex circuit, and cost up makes consumers in general be difficult to accept.

The objective of the invention is: this protector should be able to carry out effective comprehensive protection to all abnormal conditions that threaten personal safety and power consumption equipment safety (particularly refrigerator, colour TV); it has earth leakage protective; overload protection; under-voltage, overpressure protection, momentary power failure protection, incoming call time-delay, the time-delay that automatically resets (30 seconds or 5 minutes two kinds choose wantonly); functions such as big capacity break-make power; it is low to go back should cost on multi-functional basis, good reliability, and circuit is simple and easy to advantages such as manufacturing.These advantages can be won the championship it in intense market competition.

Basic design of the present invention is:

1. be core with 555 o'clock base integrated packages, various detection signals are formed via diode or circuit focuses on 555 trigger end S, output directly drives little relay, monostable trigger-action circuit constitutes automatic time delay and resets, power relay is born the break-make of loaded line, to satisfy the needs of big load electrical equipment.

2. power relay (or A.C. contactor) coil is the execution coil of relay, also is the magnetic test coil of detection of electrical leakage.Because the number of turns of coil is a lot, makes that the sensitivity of detection of electrical leakage is very high; Because one dual-purpose, makes cost descend significantly; Because contact capacity is big, satisfy the needs of high-power electric appliance; Owing to adopt mechanical contacts, improved the security reliability of protector.

3. in front the positive-or circuit that is constituted by a diode is arranged as the transistor of anti-phase amplification, there is the negative or circuit that is constituted by a diode the back, wherein be with the high level action detection signal via just or, with the low level be action detection signal via negative or, make each road detection signal compile an end.It is simple to have circuit, saves the advantage of element.

4. electric current is to make detecting element with small transformers, amplifies because of transistor is arranged, and higher susceptibility is arranged, thus lower to the requirement that detects transformer, the current value of the potentiometer scalable overload action in the loop.When the present invention did family expenses, the potentiometer adjusting knob was placed on the panel and is adjusted to appropriate value voluntarily by people, as reusable " fuse "; When the present invention does the dormitory time spent, adjusting knob is placed in the casing, is adjusted to appropriate value by the electrician, as electric current (electric weight) stopper, prevents the phenomenon of sneaking current.

5. automatic time delay resets two RC time constants, and promptly resistance is in series, and the two ends of one of them resistance are connected to a switch, is a time constant during switch opens, is the mark magnitude time, does the refrigerator protection and uses; Be another time constant when switch closes, be order of magnitude time second, do general protection and use; In addition, series capacitance C is then as the same.

Advantage of the present invention is: function is many, and cost is low, and power controlling is big, good reliability, and circuit simply is easy to make, and the higher commodity value and the market competitiveness are compared with prior art arranged.

Embodiment sees accompanying drawing: J ₁Be power relay, L ₃Be the power relay coil, L ₁, L ₂At L ₃Go up with two-wire and around several circles or tens circles and form L ₁, L ₂, L ₃Be the detection of electrical leakage element, J ₁₁, J ₁₂Be J ₁The contact, during fault-free, little relay J ₀Normally-closed contact J ₀₁L ₃Receive the base loop of BG, at this moment L ₃It is the detection of electrical leakage coil; When fault takes place, J ₀Action makes normally opened contact J ₀₂Closure is connected high pressure, at this moment, and L ₃It is the execution coil of relay.Because L ₃The number of turns a lot, so detection sensitivity is very high.L ₄, L ₅Be the current sense transformer coil, W ₁It is overload current value regulator potentiometer.R ₁₃, D ₁, C ₂Be J ₁Power supply, double as momentary power failure protection simultaneously.R ₃, R ₄Make the direct current biasing of BG, also double as detects the superpressure signal simultaneously.R ₆, R ₇Be connected on both ends of power, the ratio-voltage on it can reflect undervoltage condition.C ₄On voltage can make to come power detection signal because of its hysteresis.D ₂, D ₃Form positive-or circuit and give BG electric leakage and current detection signal, D ₄, D ₅Form negative or circuit, BG and C ₄Signal is delivered to the S end of 555 o'clock base integrated packages.R ₄, R ₉, C ₅, K _1-1Form the automatic time delay reset circuit.Work as K _1-1When closed, delay time is 30 seconds; Work as K _1-1When opening, delay time is 5 minutes.R ₁₀, DW, C ₆It is the voltage stabilizing of 555 o'clock matrixs.B ₁Be power transformer, D ₇～D ₁₀, C ₇Be rectifying and wave-filtering.R ₁₂, DZ ₁Be the power supply indication.R ₁₁, DZ ₂Be faulty indication.K ₀, R ₁₄Be leak(age) test.

Claims

Claim 1, a kind of multifunctional comprehensive protector that can protect personal safety and power consumption equipment safety is characterized in that it serves as to detect core with 555 o'clock base integrated packages; Its power relay coil is the execution coil of relay, also is the magnetic test coil of detection of electrical leakage; It is made current overload with small transformers and detects, and overload current value adjusting knob or be placed on the panel perhaps is placed in the casing; Detection of electrical leakage signal and current overload detection signal all are connected on the transistor of doing anti-phase amplification, and transistorized biasing resistor detects the superpressure signal; Ratio-voltage on the series resistance in the dc power supply circuit detects under-voltage signal; Electric capacity under it can detect incoming telephone signal; It with amplify after signal be pooled to the trigger end of 555 o'clock matrixs through diode; Automatic time delay resets two time constants (second order of magnitude and mark magnitude), is selected by switch.

Claim 2, the power relay coil of multifunctional comprehensive protector as claimed in claim 1 is the execution coil, also is the magnetic test coil of detection of electrical leakage; Promptly on the power relay coil with two-wire and around connecing power circuit for first line, coiled notebook detects loop or electric power loop as secondary connecing.

Claim 3, resistance R in the RC time constant that the automatic time delay of multifunctional comprehensive protector as claimed in claim 1 resets is that two resistance are in series, the two ends of one of them resistance are connected to a switch, it during switch opens the time constant of mark magnitude, when closing, switch, in like manner select series capacitance C also can for the time constant of second order of magnitude.

Claim 4, the overload protection value adjusting knob of multifunctional comprehensive protector as claimed in claim 1 can as required or be placed on the panel, perhaps is placed in the casing.