CN106786013B - Low-pressure multi-functional safeguard protection distribution box - Google Patents
Low-pressure multi-functional safeguard protection distribution box Download PDFInfo
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- CN106786013B CN106786013B CN201611175518.4A CN201611175518A CN106786013B CN 106786013 B CN106786013 B CN 106786013B CN 201611175518 A CN201611175518 A CN 201611175518A CN 106786013 B CN106786013 B CN 106786013B
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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
-
- 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-voltage sample detection circuit, under-voltage sample detection circuit, overload cut out sampling trigger circuit, electric leakage sampling trigger circuit, under-voltage channel selection switch, delay circuit, connection trigger circuit, cutting trigger circuit, differential circuit and power magnetic force keeping relay；Power magnetic force keeping relay is connected across in differential circuit, over-voltage sample detection circuit divides two-way to be separately connected delay circuit after under-voltage channel selection switch, connects trigger circuit, differential circuit and cutting trigger circuit, differential circuit with under-voltage sample detection circuit, and overload cut out sampling trigger circuit connects with electric leakage sampling trigger circuit output end and cuts off trigger circuit and differential circuit.Actuation time of the invention is short, avoids electrical safety accident user that from capable of selecting to guarantee daily life electricity consumption in peak of power consumption.
Description
Technical field
The invention belongs to power distribution equipment technical field, in particular to a kind of low-pressure multi-functional safeguard protection distribution boxs.
Background technique
The distribution box of existing electric terminal user is most of to be formed by air switch and earth leakage protective device on-site consolidation,
Not only installation trouble, influences indoor beauty, and defencive function is single, it is easy to cause electrical safety accident and electrical fire.
Although solving the above problem, but there is following three aspects in the multifunctional distribution box of existing Chinese patent：
（1）The on-off of total loop only uses magnetic latching relay and is controlled, and is not controlled using breaker, and national
It mandatory 3C certification is carried out to distribution box is distinctly claimed total loop on-off should to control using breaker, do not meet country to matching
The technical requirements of electronic box；（2）Failure to trip is using the movement of the action control magnetic latching relay of miniature relay, and failure is disconnected
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 longer, it is easy when line failure to cause electrical safety accident and electrical fire；（3）Low-voltage protection function user cannot select
Use is selected, in peak times of power consumption, the brownout of many routes, low-voltage protection function makes many users have electricity that can not use
Lighting apparatus, therefore promote and apply more difficult.
Summary of the invention
The technical problem to be solved by the present invention is to：The above-mentioned problems of the prior art is solved, and a kind of low pressure is provided
Multifunctional safe protects distribution box, meets country to the technical requirements of distribution box, failure to trip actuation time is short, avoids electrically pacifying
Full accident and electrical fire, and user can select to be able to carry out just using low-voltage protection function in the peak of power consumption period
Often illumination guarantees daily life electricity consumption.
The technical solution adopted by the present invention is that：A kind of low-pressure multi-functional safeguard protection distribution box, including power supply Transformer Rectifier
Filter circuit, over-voltage sample detection circuit, under-voltage sample detection circuit, overload short circuit sampling trigger circuit, electric leakage sample trigger
Circuit, delay circuit, connects trigger circuit, cutting trigger circuit, differential circuit and high-power magnetic guarantor at under-voltage channel selection switch
Hold relay；By four triodes, emitter-base bandgap grading is connected differential circuit, the connected bridge circuit of collector is constituted two-by-two two-by-two, high-power
The coil crossover of magnetic latching relay is between the collector two-by-two of the bridge circuit is connected, the touching of power magnetic force keeping relay
Head is connected on general supply incoming line, and general supply end and total load end are separated；Power supply Transformer Rectifier filter circuit
Input terminal connection from general supply end, it is the output end connection over-voltage sample detection circuit of power supply Transformer Rectifier filter circuit, under-voltage
Sample detection circuit and working power as all circuits；The output end of over-voltage sample detection circuit connects phase inverter, reverse phase
Device output end divides two-way：Delay circuit is connected all the way, and delay circuit output end, which reconnects, connects trigger circuit, connects trigger circuit
One transistor base of output end connection differential circuit；Inverter output another way connection cutting trigger circuit, cutting touching
Another transistor base of Power Generation Road output end connection differential circuit；Under-voltage sample detection circuit output end is selected through under-voltage channel
Equally divide two-way after selecting switch：It is connected to delay circuit all the way, delay circuit, which reconnects, connects trigger circuit, connects trigger circuit
Output end connects a transistor base of differential circuit, and another way connection cutting trigger circuit cuts off trigger circuit output end
Connect another transistor base of differential circuit；Overload short circuit sampling trigger circuit input terminal is connected on the firewire of total load end
Current transformer, overload short circuit sampling trigger circuit output end connection cutting trigger circuit, cutting trigger circuit output end connect
Connect another transistor base of differential circuit；The input terminal of electric leakage sampling trigger circuit is connected from the zero of total load end power supply line
Sequence current transformer, electric leakage sampling trigger circuit output end connection cutting trigger circuit, cutting trigger circuit output end connection are poor
Another transistor base of dynamic circuit.
In above-mentioned technical proposal, the general supply end also concatenates having air switch.
In above-mentioned technical proposal, the over-voltage sample detection circuit includes the over-voltage sampling electricity being made of over-voltage divider resistance
Road, the over-voltage voltage detector circuit being made of overvoltage comparison circuit, the inverter cricuit and overvoltage being made of transistor circuit
Failure indicating circuit, above-mentioned over-voltage sample circuit, over-voltage voltage detector circuit and inverter cricuit are sequentially connected.
In above-mentioned technical proposal, the under-voltage sample detection circuit includes the under-voltage sampling electricity being made of under-voltage divider resistance
Road, the brownout voltage detector circuit and under-voltage failure indicating circuit being made 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 includes the electricity by being mounted on the firewire of total load end
Current transformer constitute overload short circuit sample circuit, by the second silicon-controlled trigger circuit constituted, by diode, resistance, current potential
The rectifying and wave-filtering that device is constituted adjusts circuit, and above-mentioned current transformer, rectifying and wave-filtering adjust circuit, and trigger circuit is sequentially connected.
In above-mentioned technical proposal, the electric leakage sampling trigger circuit includes the zero sequence electricity by being mounted on the firewire of total load end
Current transformer constitute sampling circuit of electric leakage, by the first silicon-controlled leakage trigger circuit constituted, by diode, resistance, capacitor
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 successively connect
It connects.
In above-mentioned technical proposal, described under-voltage channel selection switch one end is connected to under-voltage comparison circuit by diode
Output end；The other end of under-voltage channel selection switch is divided into two-way：Delay circuit is connected by diode all the way, another way passes through
Diode connection cutting trigger circuit.
In above-mentioned technical proposal, the delay circuit connects structure with integrated circuit NE555 by capacitance-resistance delay parameter circuit
At.
In above-mentioned technical proposal, the connection trigger circuit is connected by transistor switching circuit with integrated circuit NE555
It constitutes.
In above-mentioned technical proposal, the cutting trigger circuit connects structure with integrated circuit NE555 by transistor switching circuit
At.
In above-mentioned technical proposal, the over-voltage sample detection electricity routing resistance R2, 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 under-voltage sample detection electricity routing resistance R3, R4, R5, potentiometer W2, light-emitting diodes
Pipe FD2 and under-voltage detector IC1 is constituted.
In above-mentioned technical proposal, the overload short circuit sampling trigger circuit by current transformer ZCT2, resistance R21,
The silicon-controlled T2 structure of R22, R23, R24, potentiometer W3, capacitor C13, C14, diode D14, D15, light emitting diode FD5 and second
At.
In above-mentioned technical proposal, the electric leakage sampling trigger circuit by zero sequence current mutual inductor ZCT1, resistance R18, R19,
The silicon-controlled T1 of R20, capacitor C11, C12, diode D 10, D11, flashing diode FD 4 and first is constituted.
In above-mentioned technical proposal, the delay circuit is by resistance R9, R10, R11, capacitor C3, C4,4 structure of Integrated circuit IC
At.
In above-mentioned technical proposal, the connection trigger circuit by resistance R12, R13, R14, R15, R16, R17, capacitor C5,
C6, C7, C8, C9, triode V2, Integrated circuit IC 5 are constituted.
In above-mentioned technical proposal, the cutting trigger circuit by triode V3, Integrated circuit IC 6, resistance R25, R26,
R27, R28, R29, capacitor C15, C16, C17, C18, light emitting diode FD6 are constituted.
In above-mentioned technical proposal, the differential circuit is by triode V4, V5, V6, V7, resistance R30, R31, two pole of pressure stabilizing
Pipe DW1, DW2 are constituted, and the emitter-base bandgap grading of triode V4, V5 are connected, and the emitter-base bandgap grading of triode V6, V7 are connected, the collector of triode V4, V6
It is connected, the collector of triode V5, V7 are connected, and the base stage of triode V4 passes through resistance R30, zener diode DW 1 and triode
The collector of V5 is connected, and the base stage of triode V5 passes through the collector phase of resistance R31, zener diode DW 2 and triode V4
Even, power magnetic force keeping relay coil both ends are connected on triode V4 collector and V5 collector；And triode V6
Base stage be connected to cutting trigger circuit output end, the base stage of triode V7 be connected to connect trigger circuit output end.
Advantage and effect：
Low-pressure multi-functional safeguard protection distribution box of the invention can carry out certainly total loop before to total load combined floodgate power transmission
Recovery formula is crossed, under-voltage preliminary examination protection can carry out mistake, the under-voltage failure of total loop generation after total load is powered operation
Self-recovering type examines protection online, carries out the online inspection protection of open circuit to overload, short circuit, leak current fault, each branch circuit load occurs
Overload, short trouble carry out breaking online inspection protection respectively, total loop is not carried out merely with power magnetic force keeping relay
The protection of self-recovering type failure to trip also carries out manual on-off control using air switch, and the overload of utilization air switch itself,
Total loop occurs for short-circuit protection function overload, short trouble carry out duplicate protection, while user can also be as needed, convenient
Ground chooses whether using low-voltage protection function, and informs defect content, carries out flashing light alarm, this just both ensure that electricity consumption was pacified
Entirely, and not normal electricity consumption is influenced.The present invention directlys adopt power magnetic force keeping relay contact and total loop is connected to or is cut
Disconnected, design fully meets national 3C certification to the technical requirements of distribution box.And the present invention changes existing multifunctional low-voltage
Distribution box controls the failure to trip mode of magnetic latching relay using small relay, and the present invention directlys adopt differential circuit control magnetic
Guard relay 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,
Beautiful and generous, cost performance is high, should vigorously promote the use.Especially the present invention is equipped with under-voltage channel selection switch, in electricity consumption height
The peak phase, many line voltage distributions are too low, but user uses the under-voltage channel selection switch, are still able to achieve illumination and daily life is used
Electricity facilitates the masses, is conducive to the popularization and application of product of the present invention.
Detailed description of the invention：
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 with reference to the accompanying drawing：
Referring to Fig. 1, Fig. 2, low-pressure multi-functional safeguard protection distribution box of the invention, including power supply Transformer Rectifier filtered electrical
Road, under-voltage sample detection circuit, overload short circuit sampling trigger circuit, electric leakage sampling trigger circuit, is owed over-voltage sample detection circuit
Pressure passageway selects switch, delay circuit, connects trigger circuit, cutting trigger circuit, differential circuit and high-power magnetic holding relay
Device；By four triodes, emitter-base bandgap grading is connected differential circuit, the connected bridge circuit of collector is constituted two-by-two two-by-two, and high-power magnetic is kept
Between the collector two-by-two that the line packet of relay is connected across the bridge circuit is connected, the contact of power magnetic force keeping relay is connected
On general supply incoming line, and general supply end and total load end are separated；The input of power supply Transformer Rectifier filter circuit
End is connected to general supply end, the output end connection over-voltage sample detection circuit of power supply Transformer Rectifier filter circuit, under-voltage sampling inspection
Slowdown monitoring circuit and working power as all circuits；The output end of over-voltage sample detection circuit connects phase inverter, phase inverter output
Two-way is divided at end：Delay circuit is connected all the way, and delay circuit output end, which reconnects, connects trigger circuit, connects trigger circuit output end
Connect a transistor base of differential circuit；Inverter output another way connection cutting trigger circuit, cuts off trigger circuit
Another transistor base of output end connection differential circuit；Under-voltage sample detection circuit output end is through under-voltage channel selection switch
Equally divide two-way afterwards：It is connected to delay circuit all the way, delay circuit, which reconnects, connects trigger circuit, connects trigger circuit output end
A transistor base of differential circuit is connected, another way connection cutting trigger circuit, it is poor that cutting trigger circuit output end connects
Another transistor base of dynamic circuit；Overload short circuit sampling trigger circuit input terminal is connected to the electric current on the firewire of total load end
Mutual inductor, overload short circuit sampling trigger circuit output end connection cutting trigger circuit, cutting trigger circuit output end connection are differential
Another transistor base of circuit；The input terminal connection of electric leakage sampling trigger circuit is electric from the zero sequence on the power supply line of total load end
Current transformer, electric leakage sampling trigger circuit output end connection cutting trigger circuit, cutting trigger circuit output end connect differential electricity
Another transistor base on road.The general supply end also concatenates having air switch, and the over-voltage sample detection circuit includes
The over-voltage sample circuit that is made of over-voltage divider resistance, the over-voltage voltage detector circuit being made of overvoltage comparison circuit, by three
The inverter cricuit and overvoltage failure indicating circuit that pole pipe circuit is constituted, above-mentioned over-voltage sample circuit, over-voltage voltage detector electricity
Road and inverter cricuit are sequentially connected, and the under-voltage sample detection circuit includes the under-voltage sampling electricity being made of under-voltage divider resistance
Road, the under-voltage detector circuit and under-voltage failure indicating circuit being made of under-voltage comparison circuit, under-voltage sample circuit and owe
Voltage detector circuit is sequentially connected, and the overload short circuit sampling trigger circuit includes by being mounted on electric current on the firewire of total load end
Mutual inductor constitute overload short circuit sample circuit, by the second silicon-controlled trigger circuit constituted, by diode, resistance, potentiometer
The rectifying and wave-filtering of composition adjusts circuit, and above-mentioned current transformer, rectifying and wave-filtering adjust circuit, and trigger circuit is sequentially connected, described
Electric leakage sampling trigger circuit include the sampling circuit of electric leakage being made of the zero sequence current mutual inductor being mounted on the firewire of total load end,
It is above-mentioned by the first silicon-controlled leakage trigger circuit constituted, the electric leakage current rectifying and wave filtering circuit being made of diode, resistance, capacitor
Zero sequence current mutual inductor, electric leakage current rectifying and wave filtering circuit, leakage trigger circuit are sequentially connected, described under-voltage channel selection switch one end
The output end from under-voltage comparison circuit is connected by diode；The other end of under-voltage channel selection switch is divided into two-way：A-road-through
Diode connection delay circuit is crossed, another way connects cutting trigger circuit by diode, and the delay circuit is prolonged by capacitance-resistance
When parametric circuit and integrated circuit NE555 connect and compose, the connection trigger circuit is by transistor switching circuit and integrated electricity
Road NE555 is connected and composed, and the cutting trigger circuit is connected and composed by transistor switching circuit and integrated circuit NE555, described
Over-voltage sample detection electricity routing resistance R2, R6, R7, R8, potentiometer W1, triode V1, light emitting diode FD3 and overvoltage inspection
It surveys device IC2 to constitute, the under-voltage sample detection electricity routing resistance R3, R4, R5, potentiometer W2, light emitting diode FD2 and deficient electricity
Press detector IC1 constitute, the overload short circuit sampling trigger circuit by current transformer ZCT2, resistance R21, R22, R23,
The silicon-controlled T2 of R24, potentiometer W3, capacitor C13, C14, diode D14, D15, light emitting diode FD5 and second is constituted, the leakage
Electric sampling trigger circuit by zero sequence current mutual inductor ZCT1, resistance R18, R19, R20, capacitor C11, C12, diode D 10,
The silicon-controlled T1 of D11, light emitting diode FD 4 and first is constituted, the delay circuit by resistance R9, R10, R11, capacitor C3, C4,
Integrated circuit IC 4 constitute, the connection trigger circuit by resistance R12, R13, R14, R15, R16, R17, capacitor C5, C6, C7,
C8, C9, triode V2, Integrated circuit IC 5 constitute, the differential circuit by triode V4, V5, V6, V7, resistance R30, R31,
Zener diode DW1, DW2 are constituted, and the emitter-base bandgap grading of triode V4, V5 are connected, and the emitter-base bandgap grading of triode V6, V7 are connected, triode V4, V6
Collector be connected, the collector of triode V5, V7 is connected, and the base stage of triode V4 passes through resistance R30, zener diode DW 1
It is connected with the collector of triode V5, the collection that the base stage of triode V5 passes through resistance R31, zener diode DW 2 and triode V4
Electrode is connected, and power magnetic force keeping relay line packet both ends are connected on triode V4 collector and V5 collector；And three
The base stage of pole pipe V6 is connected to the output end of cutting trigger circuit, and the base stage of triode V7 is connected to the output for connecting trigger circuit
End.
Referring to fig. 2, the circuit composition of the present embodiment is：Over-voltage sample detection electricity routing resistance R2, R6, R7, R8, potentiometer
W1, triode V1, light emitting diode FD3 and overvoltage detector IC2 are constituted；Under-voltage sample detection electricity routing resistance R3 to R5,
Potentiometer W2, light emitting diode FD2 and under-voltage detector IC1 are constituted, over-voltage sample detection circuit and under-voltage sample 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, capacitor C13, C14, diode D14, D15, light emitting diode FD5 and silicon-controlled T2
It constitutes, the firewire of total loop load end passes through current transformer ZCT2, and it is short that the secondary ZCT2-2 of current transformer is connected across overload
The input terminal of road sampling trigger circuit.Leak electricity sampling trigger circuit by zero sequence current mutual inductor ZCT1, resistance R18, R19, R20,
Capacitor C11, C12, diode D10, D11, light emitting diode FD4 and silicon-controlled T1 are constituted, the firewire at total loop total load end and
Zero curve 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 terminal on road.Delay circuit connects trigger circuit, cutting trigger circuit, these circuits of differential circuit as control electric appliance, control
Electric routing resistance R9 to R17, R25 to R31, capacitor C3 to C10, C15 to C18, diode D5 to D9, zener diode DW1,
DW2, triode V2 to V7, Integrated circuit IC 4 to IC6 are constituted, two groups of contacts J1-1 and J1- of power magnetic force keeping relay J1
2 are serially connected in respectively among the firewire of total loop and among zero curve.After the primary of power transformer B is connected across total loop air switch
Among the firewire in face and among zero curve, 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 closing the total loop air switch K General Logistics Department, transformer B is powered on, and the low AC voltage of B grade output is through two poles
There is provided DC supply to the present invention after pipe D1-D4 rectification, capacitor C1 filtering, total loop without cross, the feelings of under-voltage failure
Under condition, the voltage of the first input pin of under-voltage detector IC1 is higher than the conversion voltage of IC1, and the second output pin of IC1 is high level,
Diode D5 cut-off, overvoltage detector IC2 the first input pin voltage are lower than the conversion voltage of IC2, and the second output pin of IC2 is low
Level, triode V1 cut-off, the current collection of V1 extremely high level, diode D6 cut-off, delay integrated circuit IC4 second trigger foot
Voltage >=2/3 supply voltage, IC4 will be after being powered up stable state by temporary regime shift, and temporary stable state is held time, by resistance
The resistance value of R11 and the capacity of capacitor C3 determine that the capacity of the resistance value or C3 that change R11 can reasonably select the dimension of the temporary stable state of IC4
The time is held, during IC4 is in temporary stable state, IC4 third output pin is high level, triode V2 saturation conduction, monostable circuit IC5
There is no working power, after IC4 enters stable state, IC4 third output pin becomes low level, and V2 cut-off, IC5 is powered on, first by
Temporary regime shift is stable state, when the temporary stable state that the capacity of the resistance value or capacitor C6 that change resistance R14 can reasonably select IC5 maintains
Between, during IC5 is in temporary stable state, IC5 third output pin is high level, triode V7 and V4 conducting, high-power magnetic keep after
The first foot of coil of electric appliance J1 powers on anode through V4, and the coil crus secunda of J1 powers on 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 closed state by off-state, do not add in J1
Before negative pulse voltage, contact will be always maintained at this closed state, and the general supply end of total loop and total load termination are logical, and
Start the overvoltage failure that total loop occurs and under-voltage failure carries out self-recovering type and examines protection online, total loop is occurred
Overload, short trouble and leak current fault carry out online inspection open circuit protection, the overload that also each load branch occurs, short trouble
Open circuit protection is carried out respectively.
Defencive function principle of the invention is respectively described below below：
Self-recovering type overvoltage protection：Close total loop air switch K it is total when, as general supply end connect total load end it
Before there is overvoltage failure, the present invention gives refusal to total load end combined floodgate power transmission, if general supply end is after connecting total load end
Overvoltage failure occurs, the present invention will cut off the power supply at total load end immediately, to guarantee the electrical equipment at total load end not because of electricity
It presses through high and burns out, avoid causing electrical safety accident and electrical fire because of overtension.When voltage decline in general supply end is extensive
After answering normally, the present invention, which automatically will terminate general supply end and total load in 30s, leads to, to ensure normal electricity consumption.Its work is former
Reason is：When total current end overtension, transformer-secondary voltage is also excessively high therewith.Through diode D1-D4, capacitor C1 rectification filter
Voltage after wave is also and then excessively high, and the voltage of the first input pin of voltage detector IC2 is similarly and then excessively high, when IC2 first is defeated
When entering conversion voltage of the voltage of foot higher than IC2, the second output pin of IC2 becomes high level, triode V1 conducting, V1 from low level
Collector low level is become from high level, overvoltage malfunction indicator lamp FD3 energization brightens, diode D6, D7 and D8 conducting, three
Pole pipe V3 conducting, alarm flashing diode FD6, which is powered, to glisten, and IC6, which is powered on, enters stable state, in temporary steady state period by temporary stable state
Between, IC6 third output pin is high level, triode V6 and V5 conducting, the coil crus secunda warp of power magnetic force keeping relay J1
V5 powers on anode, and the first foot of coil of J1 powers on negative terminal through V6, and J1 adds negative pulse voltage, such as general supply end at this time
Also access failure total load end（Preliminary examination protection）, two groups of contacts J1-1 and J1-2 of J1 will continue to be locked in off-state, so
When general supply end have been turned on total load end（Load circuit is in the running online inspection protection that is powered）, then two groups of contact J1-1 of J1
Off-state will be converted to by closed state immediately with J1-2, the present invention immediately cuts off general supply end and total load end, meanwhile,
After diode D8 conducting, the voltage that IC4 second triggers foot will be less than 1/3 supply voltage, and IC3 third output pin is high electric rate, and three
Pole pipe V2 saturation conduction, IC5 is not because having normal working voltage without working.After voltage decline in general supply end restores normal, mistake
The voltage of the first input pin of voltage detector IC2 is lower than the conversion voltage value of IC2.The second output pin of IC2 becomes low from high level
Level, triode V1 become ending from being connected, and the collector of V1 becomes high level, overvoltage malfunction indicator lamp FD3 from low level
Power-off is extinguished, and diode D6, D7 and D8 are become ending from conducting, and triode V3 also is become ending from conducting, alarm flash of light two
Pole pipe FD6 power-off is extinguished, and IC6 working power is cut off and stops working, and IC4 second triggers foot voltage and becomes again as original electricity
Pressure, >=2/3 supply voltage, for IC4 after temporary stable state terminates to enter stable state, IC4 third output pin becomes low level from high level, and three
Pole pipe V2 is become ending from saturation conduction, and IC5 is powered on, and becomes stable state from temporary stable state, and during temporary stable state, IC5 third is defeated
Foot is high level out, triode V7, V4 conducting, power magnetic force keeping relay J1 because adding positive pulse voltage due to transition status,
Two groups of contacts J1-1, J1-2 of J1 are converted to closed state and are terminated general supply end and total load by off-state to be led to.
Self-recovering type low-voltage protection：Close total loop air switch K it is total when, as general supply end connect total load end it
Before there is under-voltage failure, the present invention gives refusal to total load end combined floodgate power transmission, as general supply end connect total load end it
Under-voltage failure occurs afterwards, the present invention will cut off the power supply at total load end immediately.With guarantee the electrical equipment at total load end not because
Brownout and damage.Electrical safety accident and electrical fire caused by avoid because of brownout.When general supply end voltage
Rise after restoring normal, the present invention automatically will lead at general supply end and total load termination, to ensure normal electricity consumption in 30S；?
In the case that peak times of power consumption, network voltage are too low, user can also first close low-voltage easy burn-out electrical equipment, again by owe
Voltage function selection, which switchs, deactivates low-voltage protection function, to guarantee under low voltage condition using equipment such as illuminations.Its work
Principle is：When general supply end brownout, 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 first input pin of IC1 is similarly and then too low for voltage.When IC1 the first foot voltage
When conversion voltage value lower than IC1, the second output pin of IC1 becomes low level from high level, and under-voltage malfunction indicator lamp FD2 is powered
It brightening, diode D5, D7 and D8 conducting, triode V3 conducting, alarm flashing diode FD6 are powered flash of light, IC6 is powered on,
Stable state is entered by temporary stable state.During temporary stable state, IC6 third output pin is high level, triode V6 and V5 conducting, high-power magnetic
Guard relay J1 adds negative pulse voltage.Such as general supply end also access failure total load end at this time, two groups of contact J1-1 of J1 and
J1-2 will continue to be locked in off-state（Preliminary examination protection）, such as general supply end has been turned on total load end, two groups of touchings of J1 at this time
Point J1-1 and J1-2 will be converted to off-state by closed state immediately（Online inspection protection）, the present invention immediately by general supply end and
It cuts at total load end；After diode D8 conducting simultaneously, IC4 second, which triggers foot voltage, will be less than 1/3 supply voltage, and IC4 third is defeated
Foot is high level, triode V2 saturation conduction out.IC5 is not because having normal working voltage without working.When on the voltage of general supply end
It rises after restoring normal, the output valve of Transformer Rectifier filter circuit also rises with it recovery normally, as under-voltage detector IC1 first
When input pin voltage rises to the conversion voltage value of IC1, the second output pin of IC1 is from low level becomes high level, under-voltage fault refers to
Show that lamp FD2 power-off is extinguished, diode D5, D7 and D8 become ending from being connected, triode V3 also is become ending from conducting, and alarm is dodged
Optical diode FD6 power-off is extinguished.IC6 working power is cut off and stops working.IC4 crus secunda voltage return to it is original >=2/3
Supply voltage.For IC4 after temporary stable state terminates to enter stable state, IC4 third foot becomes low level from high level.V2 is become by saturation conduction
For cut-off；IC5 is powered on, and becomes stable state from temporary stable state, IC5 third foot output during temporary stable state is high level, triode
V7 and V4 conducting, power magnetic force keeping relay J1 because add positive pulse voltage due to transition status, J1 two groups of contact J1-1 and
J1-2 is converted to closed state by off-state, general supply end and total load is terminated logical.
Overload, short-circuit power-off protection：After total load terminates the proper normal open electricity operation of logical general supply, as total load end occurs
Overload short circuit failure, the present invention will cut off immediately the power supply at total load end to ensure the use electric line and electrical equipment at total load end
It is not burnt out because of overload short circuit failure, preventing electric fire.Its working principle is that：When overload, short trouble occur for total load end
When, the induced current that ZCT2 grade ZCT2-2 of current transformer on the firewire of total load end is generated also will correspondingly increase, this
Electric current triggers silicon-controlled T2 conducting, the anode of T2 through diode D14, D15, resistance R24, R23, potentiometer W3, capacitor C13, C14
Low level is become from high level, overload, short trouble indicator light FD5 energization brighten, diode D12 is connected, triode V3 is led
Logical, alarm flashing diode FD6 is powered and glistens, and IC6, which is powered, enters stable state by temporary stable state, and IC6 third foot during temporary stable state is defeated
High level out makes triode V6 and V5 conducting, power magnetic force keeping relay J1 plus negative pulse voltage J1 conversion work shape
State, J1 two groups of contacts J1-1 and J1-2 off-state is converted to by closed state immediately.The present invention immediately by general supply end and
The cutting of total load end.Change the resistance value of adjustable resistance W3, so that it may adjust the setting value of total load end overload movement.At each
After the proper normal open electricity operation of total load is connected on road, such as overload, short trouble occur for a certain branch, and the air switch of the branch is direct
The branch circuit load end and total load end are cut off, other trouble-free branches will be powered as usual and run.
Leakage, breaking protection：After total load terminates the proper normal open electricity operation of logical general supply, as total load end is leaked electricity
Failure, the present invention will cut off the power supply at total load end immediately, to ensure personal safety, prevent electrical grounding fire.Its work is former
Reason is：When leak current fault occurs for total load end, the electricity of two total loop conducting wires across zero sequence current mutual inductor ZCT1 is flowed through
Stream will be uneven, and the current differential that ZCT1 grade ZCT1-2 will generate induced current and two total loop conducting wires flow through is got over
Greatly, the electric current of ZCT1-2 induction is also bigger.When leakage current reaches setting value, ZCT1-2 induction electric current through diode D10,
D11, resistance R18.Capacitance difference C11, C12 triggers silicon-controlled T1 conducting.The anode of T1 becomes low level from high level.Leak current fault
Indicator light FD4 energization brightens, diode D13 conducting, triode V3 conducting, alarm flashing diode FD6 energization flash of light, and IC6 is logical
Electricity enters stable state by temporary stable state.Triode V6 and V5 is connected in the IC6 high level that third foot exports during temporary stable state.It is high-power
Magnetic latching relay J1 adds negative pulse voltage, J1 conversion work state.Two groups of contacts J1-1 and J1-2 of J1 are immediately by being closed
State is converted to off-state.The present invention immediately cuts off general supply end and total load end.Rationally change the resistance value of resistance R18.
The setting value of total load end electric leakage movement can be reasonably selected.
Claims (10)
1. a kind of low-pressure multi-functional safeguard protection distribution box, it is characterised in that：It is taken including power supply Transformer Rectifier filter circuit, over-voltage
Sample detection circuit, under-voltage sample detection circuit, overload short circuit sampling trigger circuit, electric leakage sampling trigger circuit, the choosing of under-voltage channel
It selects switch, delay circuit, connect trigger circuit, cutting trigger circuit, differential circuit and power magnetic force keeping relay；Differential electricity
Routing four triodes, emitter-base bandgap grading is connected two-by-two, the connected bridge circuit of collector is constituted two-by-two, power magnetic force keeping relay
For coil crossover between the collector two-by-two of the bridge circuit is connected, the contact of power magnetic force keeping relay is connected on general supply
On incoming line, and general supply end and total load end are separated；The input terminal of power supply Transformer Rectifier filter circuit is connected to
General supply end, power supply Transformer Rectifier filter circuit output end connection over-voltage sample detection circuit, under-voltage sample detection circuit and
Working power as all circuits；The output end of over-voltage sample detection circuit connects phase inverter, and inverter output divides two-way：
Delay circuit is connected all the way, and delay circuit output end, which reconnects, connects trigger circuit, and it is differential to connect the connection of trigger circuit output end
One transistor base of circuit；Inverter output another way connection cutting trigger circuit, cutting trigger circuit output end connect
Connect another transistor base of differential circuit；Under-voltage sample detection circuit output end equally divides after under-voltage channel selection switch
Two-way：It is connected to delay circuit all the way, delay circuit, which reconnects, connects trigger circuit, and it is differential to connect the connection of trigger circuit output end
One transistor base of circuit, another way connection cutting trigger circuit, cutting trigger 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 firewire of total load end,
Overload short circuit sampling trigger circuit output end connection cutting trigger circuit, cutting trigger circuit output end connect the another of differential circuit
One transistor base；The input terminal of electric leakage sampling trigger circuit connects the zero sequence current mutual inductor from total load end power supply line,
Trigger circuit is cut off in sampling trigger circuit output end connection of leaking electricity, and cutting trigger 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：The general supply end is also
Concatenate having air switch.
3. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The over-voltage sample detection
Circuit includes the over-voltage sample circuit being made of over-voltage divider resistance, the over-voltage voltage detector electricity being made of overvoltage comparison circuit
Road, the inverter cricuit being made of transistor circuit and overvoltage failure indicating circuit, above-mentioned over-voltage sample circuit, the inspection of over-voltage voltage
It surveys device circuit and inverter cricuit is sequentially connected.
4. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The under-voltage sample detection
Circuit includes the under-voltage sample circuit being made of under-voltage divider resistance, the brownout voltage detector electricity being made of under-voltage comparison circuit
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
Trigger circuit includes the overload short circuit sample circuit being made of the current transformer being mounted on the firewire of total load end, can by second
The trigger circuit of control silicon composition, the rectifying and wave-filtering adjusting circuit being made of diode, resistance, potentiometer, above-mentioned current transformer,
Rectifying and wave-filtering adjusts circuit, and trigger 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 includes the sampling circuit of electric leakage being made of the zero sequence current mutual inductor being mounted on the firewire of total load end, silicon-controlled by first
The leakage trigger circuit of composition, the electric leakage current rectifying and wave filtering circuit being made of diode, resistance, capacitor, 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 selection switch is divided into two
Road：Delay circuit is connected by diode all the way, another way connects cutting trigger circuit by diode.
8. low-pressure multi-functional safeguard protection distribution box according to claim 1, it is characterised in that：The over-voltage samples inspection
Slowdown monitoring circuit is made of resistance R2, R6, R7, R8, potentiometer W1, triode V1, light emitting diode FD3 and overvoltage detector IC2；
Under-voltage sample detection electricity routing resistance R3, R4, R5, potentiometer W2, light emitting diode FD2 and the under-voltage detector IC1
It constitutes；The overload short circuit sampling trigger circuit by current transformer ZCT2, resistance R21, R22, R23, R24, potentiometer W3,
The silicon-controlled T2 of capacitor C13, C14, diode D14, D15, light emitting diode FD5 and second is constituted；The electric leakage sample trigger electricity
Route zero sequence current mutual inductor ZCT1, resistance R18, R19, R20, capacitor C11, C12, diode D 10, D11, light emitting diode
The silicon-controlled T1 of FD 4 and first is 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
R9, R10, R11, capacitor C3, C4, Integrated circuit IC 4 is hindered to constitute；The connection trigger circuit by resistance R12, R13, R14, R15,
R16, R17, capacitor C5, C6, C7, C8, C9, triode V2, Integrated circuit IC 5 are constituted；The cutting trigger circuit is by triode
V3, Integrated circuit IC 6, resistance R25, R26, R27, R28, R29, capacitor 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：The differential circuit
It being made of triode V4, V5, V6, V7, resistance R30, R31, zener diode DW1, DW2, the emitter-base bandgap grading of triode V4, V5 are connected,
The emitter-base bandgap grading of triode V6, V7 are connected, and the collector of triode V4, V6 are connected, and the collector of triode V5, V7 are connected, triode
The base stage of V4 is connected by resistance R30, zener diode DW 1 with the collector of triode V5, and the base stage of triode V5 passes through electricity
Resistance R31, zener diode DW 2 are connected with the collector of triode V4, and power magnetic force keeping relay coil both ends are separately connected
On triode V4 collector and V5 collector；And the base stage of triode V6 is connected to the output end of cutting trigger circuit, three poles
The base stage of pipe V7 is connected to the output end for connecting trigger 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 CN106786013A (en) | 2017-05-31 |
| CN106786013B true CN106786013B (en) | 2018-11-20 |
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ID=58891134
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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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| CN (1) | CN106786013B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL236930B1 (en) * | 2018-12-27 | 2021-02-22 | 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 |
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2016
- 2016-12-19 CN CN201611175518.4A patent/CN106786013B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN106786013A (en) | 2017-05-31 |
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