CN106786013A - Low-pressure multi-functional safeguard protection distribution box - Google Patents
Low-pressure multi-functional safeguard protection distribution box Download PDFInfo
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- CN106786013A CN106786013A CN201611175518.4A CN201611175518A CN106786013A CN 106786013 A CN106786013 A CN 106786013A CN 201611175518 A CN201611175518 A CN 201611175518A CN 106786013 A CN106786013 A CN 106786013A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of low-pressure multi-functional safeguard protection distribution box, including power supply Transformer Rectifier filter circuit, over-pressed sampling detection circuit, under-voltage sampling detection circuit, overload cut out sampling trigger circuit, electric leakage sampling trigger circuit, under-voltage channel selector switch, delay circuit, connection triggers circuit, cut-out triggers circuit, differential circuit and power magnetic force keeping relay；Power magnetic force keeping relay is connected across in differential circuit, overvoltage sampling detection circuit connects delay circuit, connects triggers circuit, differential circuit and cut-out triggers circuit, differential circuit respectively with under-voltage sampling detection circuit point two-way after under-voltage channel selector switch, and overload cut out sampling trigger circuit and electric leakage sampling trigger circuit output end connect cut-out triggers circuit and differential circuit.Actuation time of the invention is short, it is to avoid electrical safety accident user can select to ensure daily life electricity consumption in peak of power consumption.
Description
Technical field
The invention belongs to power distribution equipment technical field, a kind of low-pressure multi-functional safeguard protection distribution box is specifically referred to.
Background technology
The distribution box major part of existing electric terminal user is formed by air switch and earth leakage protective device on-site consolidation,
Trouble is not only installed, indoor beauty is influenceed, and defencive function is single, it is easy to trigger electrical safety accident and electrical fire.
The multifunctional distribution box of existing Chinese patent, although solve above mentioned problem, but in terms of there is three below：
（1）The break-make of total loop is to employ magnetic latching relay to be controlled, and is not controlled using breaker, and national
Mandatory 3C certifications are carried out to distribution box it is distinctly claimed total loop break-make should to be controlled using breaker, does not meet country to matching somebody with somebody
The technical requirements of electronic box；（2）Failure to trip is the action using the action control magnetic latching relay of miniature relay, and failure is broken
The road time is equal to the summation of miniature relay actuation time and magnetic latching relay actuation time, therefore failure to trip actuation time
It is more long, electrical safety accident and electrical fire are easily triggered during line failure；（3）Low-voltage protection function user can not be selected
Select and use, in peak times of power consumption, the brownout of many circuits, low-voltage protection function makes many users have the electricity can not to use
Lighting apparatus, therefore popularization and application are more difficult.
The content of the invention
The technical problems to be solved by the invention are：Above-mentioned prior art is solved the problems, such as, and a kind of low pressure is provided
Multifunctional safe protects distribution box, meets technical requirements of the country to distribution box, and failure to trip actuation time is short, it is to avoid electrically pacify
Full accident and electrical fire, and user can select to use low-voltage protection function, can be carried out just in the peak of power consumption period
Often illumination, it is ensured that daily life electricity consumption.
The technical solution adopted by the present invention is：A kind of low-pressure multi-functional safeguard protection distribution box, including power supply Transformer Rectifier
Filter circuit, overvoltage sampling detection circuit, under-voltage sampling detection circuit, overload short circuit sampling trigger circuit, electric leakage sample trigger
Circuit, under-voltage channel selector switch, delay circuit, connection triggers circuit, cut-out triggers circuit, differential circuit and high-power magnetic are protected
Hold relay；Differential circuit is made up of four triodes bridge circuit that emitter-base bandgap grading is connected two-by-two, colelctor electrode is connected two-by-two, high-power
The coil crossover of magnetic latching relay the bridge circuit colelctor electrode two-by-two be connected between, power magnetic force keeping relay touch
Head is connected on general supply incoming line, and general supply end is separated with total load end；Power supply Transformer Rectifier filter circuit
Input connection from general supply end, it is the output end connection overvoltage sampling detection circuit of power supply Transformer Rectifier filter circuit, under-voltage
Sampling detection circuit and the working power as all circuits；The output end connection phase inverter of overvoltage sampling detection circuit, it is anti-phase
Device output end point two-way：Delay circuit is connected all the way, and delay circuit output end is reconnected connects triggers circuit, connects triggers circuit
Output end connects a transistor base of differential circuit；Another road connection cut-out triggers circuit of inverter output, cut-out is touched
Power Generation Road output end connects another transistor base of differential circuit；Under-voltage sampling detection circuit output end is selected through under-voltage passage
Equally divide two-way after selecting switch：Delay circuit is connected to all the way, and delay circuit is reconnected connects triggers circuit, connects triggers circuit
Output end connects a transistor base of differential circuit, and another road connection cut-out triggers circuit cuts off triggers circuit output end
Connect another transistor base of differential circuit；Overload short circuit sampling trigger circuit input is connected on the live wire of total load end
Current transformer, overload short circuit sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connects
Connect another transistor base of differential circuit；The input of electric leakage sampling trigger circuit is connected from the zero of total load end power line
Sequence current transformer, electric leakage sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connection is poor
Another transistor base of dynamic circuit.
In above-mentioned technical proposal, described general supply end also concatenates having air switch.
In above-mentioned technical proposal, the overvoltage sampling detection circuit includes the overvoltage sampling electricity being made up of over-pressed divider resistance
Road, the over-pressed voltage detector circuit being made up of overvoltage comparison circuit, the negative circuit and overvoltage being made up of transistor circuit
Failure indicating circuit, above-mentioned over-pressed sample circuit, over-pressed voltage detector circuit and negative circuit are sequentially connected.
In above-mentioned technical proposal, the under-voltage sampling detection circuit includes the under-voltage sampling electricity being made up of under-voltage divider resistance
Road, the brownout voltage detector circuit and under-voltage failure indicating circuit that are made up of under-voltage comparison circuit, under-voltage sample circuit and
Brownout voltage detector circuit is sequentially connected.
In above-mentioned technical proposal, the overload short circuit sampling trigger circuit is included by the electricity on the live wire of total load end
Current transformer constitute overload short circuit sample circuit, be made up of the second controllable silicon triggers circuit, by diode, resistance, current potential
The rectifying and wave-filtering regulation circuit that device is constituted, above-mentioned current transformer, rectifying and wave-filtering regulation circuit, triggers circuit is sequentially connected.
In above-mentioned technical proposal, the electric leakage sampling trigger circuit is included by the zero sequence electricity on the live wire of total load end
Current transformer constitute sampling circuit of electric leakage, be made up of the first controllable silicon leakage trigger circuit, by diode, resistance, electric capacity
The electric leakage current rectifying and wave filtering circuit of composition, above-mentioned zero sequence current mutual inductor, electric leakage current rectifying and wave filtering circuit, leakage trigger circuit connect successively
Connect.
In above-mentioned technical proposal, described under-voltage channel selector switch one end is connected to under-voltage comparison circuit by diode
Output end；The other end of under-voltage channel selector switch is divided into two-way：Diode connection delay circuit is led up to, is separately led up to
Diode connection cut-out triggers circuit.
In above-mentioned technical proposal, described delay circuit is by capacitance-resistance delay parameter circuit and integrated circuit NE555 connection structures
Into.
In above-mentioned technical proposal, described connection triggers circuit is connected by transistor switching circuit and integrated circuit NE555
Constitute.
In above-mentioned technical proposal, the cut-out triggers circuit is by transistor switching circuit and integrated circuit NE555 connection structures
Into.
In above-mentioned technical proposal, the described electric routing resistance R2 of overvoltage sampling detection, R6, R7, R8, potentiometer W1, three poles
Pipe V1, light emitting diode FD3 and overvoltage detector IC2 are constituted.
In above-mentioned technical proposal, the described electric routing resistance R3 of under-voltage sampling detection, R4, R5, potentiometer W2, light-emitting diodes
Pipe FD2 and under-voltage detector IC1 is constituted.
In above-mentioned technical proposal, described overload short circuit sampling trigger circuit by current transformer ZCT2, resistance R21,
R22, R23, R24, potentiometer W3, electric capacity C13, C14, diode D14, D15, light emitting diode FD5 and the second controllable silicon T2 structures
Into.
In above-mentioned technical proposal, it is described electric leakage sampling trigger circuit by zero sequence current mutual inductor ZCT1, resistance R18, R19,
R20, electric capacity C11, C12, diode D 10, D11, the controllable silicon T1 of flashing diode FD 4 and first are constituted.
In above-mentioned technical proposal, the delay circuit is by resistance R9, R10, R11, electric capacity C3, C4, the structure of IC 4
Into.
In above-mentioned technical proposal, it is described connection triggers circuit by resistance R12, R13, R14, R15, R16, R17, electric capacity C5,
C6, C7, C8, C9, triode V2, IC 5 are constituted.
In above-mentioned technical proposal, it is described cut-out triggers circuit by triode V3, integrated circuit TC6, resistance R25, R26,
R27, R28, R29, electric capacity C15, C16, C17, C18, light emitting diode FD6 are constituted.
In above-mentioned technical proposal, described differential circuit is by triode V4, V5, V6, V7, resistance R30, R31, the pole of voltage stabilizing two
Pipe DW1, DW2 are constituted, and the emitter-base bandgap grading of triode V4, V5 is connected, and the emitter-base bandgap grading of triode V6, V7 is connected, the colelctor electrode of triode V4, V6
It is connected, the colelctor electrode of triode V5, V7 is connected, the base stage of triode V4 passes through resistance R30, voltage-regulator diode DW 1 and triode
The colelctor electrode of V5 is connected, and the base stage of triode V5 passes through the colelctor electrode phase of resistance R31, voltage-regulator diode DW 2 and triode V4
Even, power magnetic force keeping relay coil two ends are connected on triode V4 colelctor electrodes and V5 colelctor electrodes；And triode V6
Base stage be connected to the output end of cut-out triggers circuit, the base stage of triode V7 is connected to the output end for connecting triggers circuit.
Advantage and effect：
Low-pressure multi-functional safeguard protection distribution box of the invention can carry out self- recoverage before to total load combined floodgate power transmission to total loop
Formula is crossed, under-voltage preliminary examination protection, and after total load is powered operation, the mistake that can occur to total loop, under-voltage failure are carried out from extensive
Compound online inspection protection, breaking online inspection protection, the mistake occurred to each branch circuit load are carried out to overload, short circuit, leak current fault
Carry, short trouble carries out breaking online inspection protection respectively, total loop is not carried out from extensive merely with power magnetic force keeping relay
Double fault open circuit protection, also carries out manual break-make control using air switch, and using overload, the short circuit of air switch itself
Overload that defencive function occurs to total loop, short trouble carry out duplicate protection, while user can also easily select as needed
Select and whether use low-voltage protection function, and inform defect content, carry out flashing light alarm, this just both ensure that Electrical Safety, and
Do not influence normal electricity consumption.It is of the invention that directly total loop is connected or cut off using power magnetic force keeping relay contact, its
Design fully meets technical requirements of the national 3C certifications to distribution box.And the present invention changes existing Multifunctional low voltage distribution box
Using the failure to trip mode of small Control magnetic latching relay, the present invention directly using differential circuit control magnetic holding after
Electrical contact open circuit, failure to trip guard time is fast, and protecting effect is good, and integrated level is high, multiple functional, easy to use, attractive in appearance big
Side, cost performance is high, should vigorously promote the use.Particularly the present invention is provided with under-voltage channel selector switch, in peak times of power consumption, no
Few line voltage distribution is too low, but user uses the under-voltage channel selector switch, remains to realize illumination and daily life electricity consumption, facilitates
The masses, are conducive to the popularization and application of product of the present invention.
Brief description of the drawings：
Fig. 1 is electrical principle block diagram of the present invention；
Fig. 2 is implementing circuit figure of the present invention.
The model of integrated circuit used in figure：
IC1、IC2:HT7033A-1;IC3:78L12;IC4、IC5、IC6:NE555
Specific embodiment：
Specific implementation of the invention is described further below in conjunction with the accompanying drawings：
Referring to Fig. 1, Fig. 2, low-pressure multi-functional safeguard protection distribution box of the invention, including power supply Transformer Rectifier filter circuit, mistake
It is pressure sampling detection circuit, under-voltage sampling detection circuit, overload short circuit sampling trigger circuit, electric leakage sampling trigger circuit, under-voltage logical
Road selecting switch, delay circuit, connection triggers circuit, cut-out triggers circuit, differential circuit and power magnetic force keeping relay；Difference
Dynamic circuit is made up of four triodes bridge circuit that emitter-base bandgap grading is connected two-by-two, colelctor electrode is connected two-by-two, and high-power magnetic keeps relay
The line bag of device be connected across the colelctor electrode two-by-two of the bridge circuit be connected between, the contact of power magnetic force keeping relay is connected on always
On power input circuit, and general supply end is separated with total load end；The input of power supply Transformer Rectifier filter circuit connects
It is connected to general supply end, the output end connection overvoltage sampling detection circuit of power supply Transformer Rectifier filter circuit, under-voltage sampling detection electricity
Road and the working power as all circuits；The output end connection phase inverter of overvoltage sampling detection circuit, inverter output point
Two-way：Delay circuit is connected all the way, and delay circuit output end is reconnected connects triggers circuit, connects the connection of triggers circuit output end
One transistor base of differential circuit；Another road connection cut-out triggers circuit of inverter output, cut-out triggers circuit output
Another transistor base of end connection differential circuit；Under-voltage sampling detection circuit output end is same after under-voltage channel selector switch
Sample point two-way：Delay circuit is connected to all the way, and delay circuit is reconnected connects triggers circuit, connects the connection of triggers circuit output end
One transistor base of differential circuit, another road connection cut-out triggers circuit, cut-out triggers circuit output end connects differential electricity
Another transistor base on road；Overload short circuit sampling trigger circuit input is connected to the Current Mutual Inductance on the live wire of total load end
Device, overload short circuit sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connection differential circuit
Another transistor base；The zero-sequence current that the input of electric leakage sampling trigger circuit is connected from the power line of total load end is mutual
Sensor, electric leakage sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connection differential circuit
Another transistor base.Described general supply end also concatenates having air switch, and the overvoltage sampling detection circuit is included by mistake
Pressure divider resistance constitute over-pressed sample circuit, be made up of overvoltage comparison circuit over-pressed voltage detector circuit, by triode
Negative circuit and overvoltage failure indicating circuit that circuit is constituted, above-mentioned over-pressed sample circuit, over-pressed voltage detector circuit and
Negative circuit is sequentially connected, it is described it is under-voltage sampling detection circuit include be made up of under-voltage divider resistance under-voltage sample circuit, by
Under-voltage detector circuit and under-voltage failure indicating circuit that under-voltage comparison circuit is constituted, under-voltage sample circuit and under-voltage are examined
Survey device circuit to be sequentially connected, the overload short circuit sampling trigger circuit is included by the current transformer on the live wire of total load end
The overload short circuit sample circuit of composition, the triggers circuit being made up of the second controllable silicon, it is made up of diode, resistance, potentiometer
Rectifying and wave-filtering adjusts circuit, and above-mentioned current transformer, rectifying and wave-filtering regulation circuit, triggers circuit are sequentially connected, and the electric leakage takes
Sample triggers circuit include be made up of the zero sequence current mutual inductor on the live wire of total load end sampling circuit of electric leakage, by first
The leakage trigger circuit of controllable silicon composition, the electric leakage current rectifying and wave filtering circuit being made up of diode, resistance, electric capacity, above-mentioned zero sequence electricity
Current transformer, electric leakage current rectifying and wave filtering circuit, leakage trigger circuit are sequentially connected, and described under-voltage channel selector switch one end passes through two
Pole pipe connects the output end from under-voltage comparison circuit；The other end of under-voltage channel selector switch is divided into two-way：Lead up to two poles
Pipe connects delay circuit, separately leads up to diode connection cut-out triggers circuit, and described delay circuit is by capacitance-resistance delay parameter
Circuit and integrated circuit NE555 are connected and composed, and described connection triggers circuit is by transistor switching circuit and integrated circuit NE555
Connect and compose, the cut-out triggers circuit is connected and composed by transistor switching circuit and integrated circuit NE555, and described overvoltage takes
The electric routing resistance R2 of sample detection, R6, R7, R8, potentiometer W1, triode V1, light emitting diode FD3 and overvoltage detector IC2
Constitute, described under-voltage sampling detects electric routing resistance R3, R4, R5, potentiometer W2, light emitting diode FD2 and under-voltage detection
Device IC1 is constituted, and described overload short circuit sampling trigger circuit is by current transformer ZCT2, resistance R21, R22, R23, R24, current potential
Device W3, electric capacity C13, C14, diode D14, D15, light emitting diode FD5 and the second controllable silicon T2 are constituted, and the electric leakage sampling is touched
Power Generation Road is by zero sequence current mutual inductor ZCT1, resistance R18, R19, R20, electric capacity C11, C12, diode D 10, D11, luminous two
The controllable silicon T1 of pole pipe FD 4 and first are constituted, and the delay circuit is by resistance R9, R10, R11, electric capacity C3, C4, IC
4 are constituted, and the connection triggers circuit is by resistance R12, R13, R14, R15, R16, R17, electric capacity C5, C6, C7, C8, C9, triode
V2, IC 5 are constituted, and described differential circuit is by triode V4, V5, V6, V7, resistance R30, R31, voltage-regulator diode
DW1, DW2 are constituted, and the emitter-base bandgap grading of triode V4, V5 is connected, and the emitter-base bandgap grading of triode V6, V7 is connected, the colelctor electrode phase of triode V4, V6
Even, the colelctor electrode of triode V5, V7 is connected, and the base stage of triode V4 is by resistance R30, voltage-regulator diode DW 1 and triode V5
Colelctor electrode be connected, the base stage of triode V5 is connected by resistance R31, voltage-regulator diode DW 2 with the colelctor electrode of triode V4,
Power magnetic force keeping relay line bag two ends are connected on triode V4 colelctor electrodes and V5 colelctor electrodes；And the base of triode V6
Pole is connected to the output end of cut-out triggers circuit, and the base stage of triode V7 is connected to the output end for connecting triggers circuit.
Referring to Fig. 2, the circuit composition of the present embodiment is：The electric routing resistance R2 of overvoltage sampling detection, R6, R7, R8, potentiometer
W1, triode V1, light emitting diode FD3 and overvoltage detector IC2 are constituted；The under-voltage electric routing resistance R3 to R5 of sampling detection,
Potentiometer W2, light emitting diode FD2 and under-voltage detector IC1 are constituted, and overvoltage sampling detects circuit and under-voltage sampling detection electricity
The sampling end on road is all connected to the output end of power supply Transformer Rectifier filter circuit.Overload short circuit sampling trigger circuit is by current transformer
ZCT2, resistance R21 to R24, potentiometer W3, electric capacity C13, C14, diode D14, D15, light emitting diode FD5 and controllable silicon T2
Constitute, the live wire of total loop load end passes through current transformer ZCT2, it is short that the secondary ZCT2-2 of current transformer is connected across overload
The input of road sampling trigger circuit.Electric leakage sampling trigger circuit by zero sequence current mutual inductor ZCT1, resistance R18, R19, R20,
Electric capacity C11, C12, diode D10, D11, light emitting diode FD4 and controllable silicon T1 are constituted, the live wire at total loop total load end and
Zero line is connected across electric leakage sample trigger electricity also cross zero sequence current mutual inductor ZCT1, the secondary ZCT1-2 of zero sequence current mutual inductor
The input on road.Delay circuit, connection triggers circuit, cut-out triggers circuit, these circuits of differential circuit are control apparatus, control
Electric routing resistance R9 to R17, R25 to R31, electric capacity C3 to C10, C15 to C18, diode D5 to D9, voltage-regulator diode DW1,
DW2, triode V2 to V7, IC 4 to IC6 constitute, two groups of contacts J1-1 and J1- of power magnetic force keeping relay J1
2 are serially connected in the middle of the live wire of total loop and in the middle of zero line respectively.After the primary of power transformer B is connected across total loop air switch
In the middle of the live wire in face and in the middle of zero line, the secondary of power transformer B is connected to current rectifying and wave filtering circuit, and power supply indicator FD1 is through current limliting
The output end of current rectifying and wave filtering circuit is connected across after resistance R1.
Circuit operation principle：
When the total loop air switch K General Logistics Departments of closing, transformer B energization work, the B low AC voltage of level output is through diode
There is provided DC supply to the present invention after D1-D4 rectifications, electric capacity C1 filtering, total loop without crossing, the situation of under-voltage failure
Under, the conversion voltage of the voltage higher than IC1 of the input pins of under-voltage detector IC1 first, the output pins of IC1 second are high level, two
Pole pipe D5 ends, and conversion voltage of the first input pins of overvoltage detector IC2 voltage less than IC2, the output pins of IC2 second are low electricity
Flat, triode V1 cut-offs, the current collection extremely high level of V1, diode D6 cut-offs, delay integrated circuit IC4 second triggers the electricity of pin
>=2/3 supply voltage of pressure, IC4 will be after being powered up stable state by temporary regime shift, and temporary stable state is held time, by resistance
The capacity decision of the resistance and electric capacity C3 of R11, changes the dimension of the resistance of R11 or the capacity of C3 with regard to the energy reasonable selection temporary stable states of IC4
The time is held, during IC4 is in temporary stable state, the output pins of IC4 the 3rd are high level, triode V2 saturation conductions, monostable circuit IC5
There is no working power, after IC4 enters stable state, the output pins of IC4 the 3rd are changed into low level, V2 cut-offs, IC5 energization work, first by
Temporary regime shift is stable state, when the resistance of change resistance R14 or the capacity of electric capacity C6 are maintained with regard to the temporary stable state of energy reasonable selection IC5
Between, during IC5 is in temporary stable state, the output pins of IC5 the 3rd are high level, triode V7 and V4 conducting, high-power magnetic keep after
The pin of coil first of electrical equipment J1 switches on power anode through V4, and the coil crus secunda of J1 switches on power negative terminal through V7, and J1 is because plus just
Pulse voltage and transition status, two groups of contact J1-1 and J1-2 of J1 are converted to closure state, do not add in J1 by off-state
Before negative pulse voltage, its contact will be always maintained at this closure state, and the general supply end of total loop and total load termination are logical, and
Start that the overvoltage failure and under-voltage failure of total loop generation are carried out self-recovering type and examine protection online, occur to total loop
Overload, short trouble and leak current fault are examined open circuit protection, the overload for also occurring to each load branch, short trouble online
Open circuit protection is carried out respectively.
Defencive function principle of the invention is respectively described below below：
Self-recovering type overvoltage protection：When the total loop air switch K that closes is total, if general supply end is if before connecting total load end
There is overvoltage failure, refusal is given total load end combined floodgate power transmission by the present invention, and such as general supply end occurs after total load end is connected
Overvoltage failure, the present invention will immediately cut off the power supply at total load end, to ensure the electrical equipment at total load end not because of voltage mistake
It is high and burn out, it is to avoid because overtension and caused by electrical safety accident and electrical fire.Recover just when general supply terminal voltage declines
Chang Hou, the present invention will be automatic logical by general supply end and total load termination in 30s, to ensure normal electricity consumption.Its operation principle is：
When total current terminal voltage is too high, transformer-secondary voltage is also too high therewith.Through diode D1-D4, after electric capacity C1 rectifying and wave-filterings
Voltage it is also and then too high, the voltage of the input pins of voltage detector IC2 first is similarly and then too high, when the input pins of IC2 first
Conversion voltage of the voltage higher than IC2 when, the output pins of IC2 second are changed into high level from low level, triode V1 conductings, the collection of V1
Electrode is changed into low level from high level, and overvoltage malfunction indicator lamp FD3 is powered and brightens, diode D6, D7 and D8 conducting, triode
V3 is turned on, and alarm flashing diode FD6 is powered flash of light, and IC6 energizations work enters stable state by temporary stable state, during temporary stable state, IC6
3rd output pin is high level, and triode V6 and V5 conducting, the coil crus secunda of power magnetic force keeping relay J1 are connected through V5
Power positive end, the pin of coil first of J1 switches on power negative terminal through V6, and J1 adds negative pulse voltage, and such as now general supply end does not connect also
Logical total load end（Preliminary examination is protected）, two groups of contacts J1-1 and J1-2 of J1 will continue to be locked in off-state, such as now total electric
Source has been turned on total load end（Load circuit is in the operating online inspection protection that is powered）, then two groups of contacts J1-1 and J1-2 of J1
Off-state will be converted to by closure state immediately, the present invention immediately cuts off general supply end and total load end, meanwhile, diode
After D8 conductings, the voltage of the triggering pin of IC4 second will be less than 1/3 supply voltage, and the output pins of IC3 the 3rd are electricity rate high, triode V2
Saturation conduction, IC5 is because no normal working voltage is without work.After general supply terminal voltage declines recovers normal, overvoltage inspection
Survey the conversion voltage value of the voltage less than IC2 of device the first input pins of IC2.The output pins of IC2 second are changed into low level, three from high level
Pole pipe V1 is changed into cut-off from turning on, and the colelctor electrode of V1 is changed into high level from low level, and overvoltage malfunction indicator lamp FD3 power-off is put out
Go out, diode D6, D7 and D8 are changed into cut-off from conducting, and triode V3 is also changed into cut-off, alarm flashing diode FD6 from conducting
Power-off is extinguished, and IC6 working powers are cut off and are stopped, and it is original voltage that the triggering pin voltages of IC4 second become again, and >=2/3
Supply voltage, after temporary stable state terminates to enter stable state, the output pins of IC4 the 3rd are changed into low level to IC4 from high level, triode V2 by
Saturation conduction is changed into cut-off, and IC5 energization work is changed into stable state from temporary stable state, and during temporary stable state, the output pins of IC5 the 3rd are height
Level, triode V7, V4 conducting, power magnetic force keeping relay J1 is because of the transition status plus positive pulse voltage, two groups of J1
Contact J1-1, J1-2 are converted to closure state by off-state, and general supply end and total load termination is logical.
Self-recovering type low-voltage protection：When the total loop air switch K that closes is total, such as general supply end connect total load end it
Before there is under-voltage failure, refusal is given total load end combined floodgate power transmission by the present invention, such as general supply end connect total load end it
There is under-voltage failure, the present invention afterwards by the power supply at cut-out total load end immediately.With ensure the electrical equipment at total load end not because
Brownout and damage.So as to avoid electrical safety accident and the electrical fire caused by brownout.When general supply terminal voltage
Rise after recovering normal, the present invention will in 30S it is automatic by general supply end and total load termination it is logical, ensuring normal electricity consumption；
In the case that peak times of power consumption, line voltage are too low, user can also first close low-voltage easy burn-out electrical equipment, again by owe
Voltage function selecting switch disables low-voltage protection function, to ensure to use the equipment such as illumination under low voltage condition.Its work
Principle is：When general supply terminal voltage is too low, transformer-secondary voltage is also too low therewith, after D1-D4, C1 rectifying and wave-filtering
Also and then the voltage of too low, voltage detector the input pins of IC1 first is similarly and then too low for voltage.When IC1 the first pin voltages
During conversion voltage value less than IC1, the output pins of IC1 second are changed into low level from high level, and under-voltage malfunction indicator lamp FD2 is powered
Brighten, diode D5, D7 and D8 conducting, triode V3 conductings, alarm flashing diode FD6 are powered and glisten, IC6 energizations work,
Stable state is entered by temporary stable state.During temporary stable state, the output pins of IC6 the 3rd are high level, triode V6 and V5 conducting, high-power magnetic
Guard relay J1 adds negative pulse voltage.Such as now general supply end also access failure total load end, two groups of contact J1-1 of J1 and
J1-2 will continue to be locked in off-state（Preliminary examination is protected）, such as now general supply end has been turned on total load end, and two groups of J1 are touched
Point J1-1 and J1-2 will be converted to off-state by closure state immediately（Online inspection protection）, the present invention immediately by general supply end and
Cut at total load end；After diode D8 conductings simultaneously, the triggering pin voltages of IC4 second will be less than 1/3 supply voltage, and IC4 the 3rd is defeated
Go out pin for high level, triode V2 saturation conductions.IC5 is because no normal working voltage is without work.When in general supply terminal voltage
Rise after recovering normal, the output valve of Transformer Rectifier filter circuit also rises therewith recovers normal, as under-voltage detector IC1 first
When input pin voltage rises to the conversion voltage value of IC1, the output pins of IC1 second are changed into high level, under-voltage fault and refer to from low level
Show that lamp FD2 power-off is extinguished, diode D5, D7 and D8 are changed into cut-off from turning on, triode V3 is also changed into cut-off from conducting, and alarm is dodged
Optical diode FD6 power-off is extinguished.IC6 working powers are cut off and are stopped.IC4 crus secunda voltages return to it is original >=2/3
Supply voltage.After temporary stable state terminates to enter stable state, the pin of IC4 the 3rd are changed into low level to IC4 from high level.V2 is become by saturation conduction
It is cut-off；IC5 energization work, stable state is changed into from temporary stable state, and IC5 the 3rd pin during temporary stable state are output as high level, triode
V7 and V4 are turned on, power magnetic force keeping relay J1 because plus positive pulse voltage transition status, two groups of contact J1-1 of J1 and
J1-2 is converted to closure state by off-state, and general supply end and total load termination is logical.
Overload, short-circuit power-off protection：After the logical general supply end normal power-up operation of total load termination, such as total load end occurs
Overload short circuit failure, the present invention is by the power supply at cut-out total load end immediately ensuring the use electric line and electrical equipment at total load end
Do not burnt out because of overload short circuit failure, preventing electric fire.Its operation principle is：When total load end occurs overload, short trouble
When, the induced-current that the ZCT2 level ZCT2-2 of current transformer on the live wire of total load end is produced also will correspondingly increase, this
Electric current is through diode D14, D15, resistance R24, R23, potentiometer W3, electric capacity C13, C14 triggering controllable silicon T2 conductings, the anode of T2
Low level is changed into from high level, overload, short trouble indicator lamp FD5 energizations are brightened, diode D12 is turned on, triode V3 leads
Logical, alarm flashing diode FD6 is powered and glistens, and IC6 is powered and enters stable state by temporary stable state, and IC6 the 3rd pin during temporary stable state are defeated
The high level for going out turns on triode V6 and V5, power magnetic force keeping relay J1 adds negative pulse voltage J1 conversion work shapes
State, two groups of contacts J1-1 and J1-2 of J1 are converted to off-state by closure state immediately.The present invention immediately by general supply end and
Total load end cuts off.Change the resistance of adjustable resistance W3, it is possible to adjust the setting value of total load end overload action.In each branch
After the normal power-up operation of total load end is connected on road, such as there is overload, short trouble in a certain branch road, and the air switch of the branch road is direct
The branch circuit load end and total load end are cut off, other trouble-free branch roads will as usual be powered and run.
Leakage, breaking is protected：After the logical general supply end normal power-up operation of total load termination, such as total load end is leaked electricity
Failure, the present invention will immediately cut off the power supply at total load end, to ensure personal safety, prevent electrical grounding fire.Its work is former
Reason is：When total load end occurs leak current fault, two electricity of total loop wire through zero sequence current mutual inductor ZCT1 are flowed through
Stream will be uneven, and ZCT1 level ZCT1-2 will produce the current differential that induced-current and two total loop wires flow through to get over
Greatly, the electric current of ZCT1-2 sensings is also bigger.When leakage current reaches setting value, ZCT1-2 sensing electric current through diode D10,
D11, resistance R18.The triggering controllable silicon T1 conductings of capacitance difference C11, C12.The anode of T1 is changed into low level from high level.Leak current fault
Indicator lamp FD4 is powered and brightens, and diode D13 conductings, triode V3 conductings, the FD6 energization flashes of light of alarm flashing diode, IC6 lead to
Electricity enters stable state by temporary stable state.IC6 high level of the 3rd pin output during temporary stable state turns on triode V6 and V5.It is high-power
Magnetic latching relay J1 adds negative pulse voltage, J1 conversion work states.Two groups of contacts J1-1 and J1-2 of J1 are immediately by closing
State Transferring is off-state.The present invention immediately cuts off general supply end and total load end.Rationally change the resistance of resistance R18.
The setting value that can be just acted with the electric leakage of reasonable selection total load end.
Claims (10)
1. a kind of low-pressure multi-functional safeguard protection distribution box, it is characterised in that：Taken including power supply Transformer Rectifier filter circuit, overvoltage
Sample detection circuit, under-voltage sampling detection circuit, overload short circuit sampling trigger circuit, electric leakage sampling trigger circuit, the choosing of under-voltage passage
Select switch, delay circuit, connect triggers circuit, cut-out triggers circuit, differential circuit and power magnetic force keeping relay；Differential electricity
Four triodes of route bridge circuit that emitter-base bandgap grading is connected two-by-two, colelctor electrode is connected two-by-two is constituted, power magnetic force keeping relay
Between the colelctor electrode two-by-two of the bridge circuit is connected, the contact of power magnetic force keeping relay is connected on general supply to coil crossover
On incoming line, and general supply end is separated with total load end；The input of power supply Transformer Rectifier filter circuit is connected to
General supply end, power supply Transformer Rectifier filter circuit output end connection overvoltage sampling detection circuit, under-voltage sampling detection circuit and
As the working power of all circuits；The output end connection phase inverter of overvoltage sampling detection circuit, inverter output point two-way：
Delay circuit is connected all the way, and delay circuit output end is reconnected connects triggers circuit, connects the connection of triggers circuit output end differential
One transistor base of circuit；Another road connection cut-out triggers circuit of inverter output, cut-out triggers circuit output end connects
Connect another transistor base of differential circuit；Under-voltage sampling detection circuit output end equally divides after under-voltage channel selector switch
Two-way：Delay circuit is connected to all the way, and delay circuit is reconnected connects triggers circuit, connects the connection of triggers circuit output end differential
One transistor base of circuit, another road connection cut-out triggers circuit, cut-out triggers circuit output end connection differential circuit
Another transistor base；Overload short circuit sampling trigger circuit output end is connected to the current transformer on the live wire of total load end,
Overload short circuit sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connects the another of differential circuit
One transistor base；The input of electric leakage sampling trigger circuit connects the zero sequence current mutual inductor from total load end power line,
Electric leakage sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connects another of differential circuit
Transistor base.
2. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：Described general supply end is also
Concatenation having air switch.
3. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The overvoltage sampling detection
Circuit includes the over-pressed sample circuit being made up of over-pressed divider resistance, the over-pressed voltage detector being made up of overvoltage comparison circuit electricity
Road, the negative circuit being made up of transistor circuit and overvoltage failure indicating circuit, above-mentioned over-pressed sample circuit, over-pressed voltage inspection
Survey device circuit and negative circuit is sequentially connected.
4. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The under-voltage sampling detection
Circuit includes the under-voltage sample circuit being made up of under-voltage divider resistance, the brownout voltage detector being made up of under-voltage comparison circuit electricity
Road and under-voltage failure indicating circuit, under-voltage sample circuit and brownout voltage detector circuit are sequentially connected.
5. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The overload short circuit sampling
Triggers circuit include be made up of the current transformer on the live wire of total load end overload short circuit sample circuit, can by second
The triggers circuit of control silicon composition, the rectifying and wave-filtering regulation circuit being made up of diode, resistance, potentiometer, above-mentioned current transformer,
Rectifying and wave-filtering adjusts circuit, and triggers circuit is sequentially connected.
6. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The electric leakage sample trigger
Circuit include be made up of the zero sequence current mutual inductor on the live wire of total load end sampling circuit of electric leakage, by the first controllable silicon
The leakage trigger circuit of composition, the electric leakage current rectifying and wave filtering circuit being made up of diode, resistance, electric capacity, above-mentioned zero sequence current mutual inductance
Device, electric leakage current rectifying and wave filtering circuit, leakage trigger circuit are sequentially connected.
7. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The under-voltage channel selecting
Switch one end is connected to the output end of under-voltage comparison circuit by diode；The other end of under-voltage channel selector switch is divided into two
Road：Diode connection delay circuit is led up to, diode connection cut-out triggers circuit is separately led up to.
8. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：Described overvoltage sampling inspection
Slowdown monitoring circuit is made up of resistance R2, R6, R7, R8, potentiometer W1, triode V1, light emitting diode FD3 and overvoltage detector IC2；
The described electric routing resistance R3 of under-voltage sampling detection, R4, R5, potentiometer W2, light emitting diode FD2 and under-voltage detector IC1
Constitute；Described overload short circuit sampling trigger circuit by current transformer ZCT2, resistance R21, R22, R23, R24, potentiometer W3,
Electric capacity C13, C14, diode D14, D15, light emitting diode FD5 and the second controllable silicon T2 are constituted；The electric leakage sample trigger electricity
Route zero sequence current mutual inductor ZCT1, resistance R18, R19, R20, electric capacity C11, C12, diode D 10, D11, light emitting diode
The controllable silicon T1 of FD 4 and first are constituted.
9. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The delay circuit is by electricity
Resistance R9, R10, R11, electric capacity C3, C4, IC 4 are constituted；It is described connection triggers circuit by resistance R12, R13, R14, R15,
R16, R17, electric capacity C5, C6, C7, C8, C9, triode V2, IC 5 are constituted；The cut-out triggers circuit is by triode
V3, integrated circuit TC6, resistance R25, R26, R27, R28, R29, electric capacity C15, C16, C17, C18, flashing diode FD6 are constituted.
10. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：Described differential circuit
It is made up of triode V4, V5, V6, V7, resistance R30, R31, voltage-regulator diode DW1, DW2, the emitter-base bandgap grading of triode V4, V5 is connected,
The emitter-base bandgap grading of triode V6, V7 is connected, and the colelctor electrode of triode V4, V6 is connected, and the colelctor electrode of triode V5, V7 is connected, triode
The base stage of V4 is connected by resistance R30, voltage-regulator diode DW 1 with the colelctor electrode of triode V5, and the base stage of triode V5 is by electricity
Resistance R31, voltage-regulator diode DW 2 are connected with the colelctor electrode of triode V4, and power magnetic force keeping relay coil two ends connect respectively
On triode V4 colelctor electrodes and V5 colelctor electrodes；And the base stage of triode V6 is connected to the output end of cut-out triggers circuit, three poles
The base stage of pipe V7 is connected to the output end for connecting triggers circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611175518.4A CN106786013B (en) | 2016-12-19 | 2016-12-19 | Low-pressure multi-functional safeguard protection distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611175518.4A CN106786013B (en) | 2016-12-19 | 2016-12-19 | Low-pressure multi-functional safeguard protection distribution box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106786013A true CN106786013A (en) | 2017-05-31 |
| CN106786013B CN106786013B (en) | 2018-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611175518.4A Expired - Fee Related CN106786013B (en) | 2016-12-19 | 2016-12-19 | Low-pressure multi-functional safeguard protection distribution box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL428387A1 (en) * | 2018-12-27 | 2019-07-29 | Politechnika Opolska | Low-voltage power supply circuit |
| CN112595882A (en) * | 2020-12-09 | 2021-04-02 | 中国十九冶集团有限公司 | Light-operated combined warning device |
-
2016
- 2016-12-19 CN CN201611175518.4A patent/CN106786013B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL428387A1 (en) * | 2018-12-27 | 2019-07-29 | Politechnika Opolska | Low-voltage power supply circuit |
| CN112595882A (en) * | 2020-12-09 | 2021-04-02 | 中国十九冶集团有限公司 | Light-operated combined warning device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106786013B (en) | 2018-11-20 |
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