CN206293788U - Low-pressure multi-functional safeguard protection distribution box - Google Patents
Low-pressure multi-functional safeguard protection distribution box Download PDFInfo
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- CN206293788U CN206293788U CN201621392350.8U CN201621392350U CN206293788U CN 206293788 U CN206293788 U CN 206293788U CN 201621392350 U CN201621392350 U CN 201621392350U CN 206293788 U CN206293788 U CN 206293788U
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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.The utility model actuation time is short, it is to avoid electrical safety accident, and user can select to ensure daily life electricity consumption in peak of power consumption.
Description
Technical field
The utility model belongs to power distribution equipment technical field, specifically refers to a kind of low-pressure multi-functional safeguard protection distribution
Case.
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.
Utility model content
Technical problem to be solved in the utility model is：Above-mentioned prior art is solved the problems, such as, and provides a kind of
Low-pressure multi-functional safeguard protection distribution box, meets technical requirements of the country to distribution box, and failure to trip actuation time is short, it is to avoid electricity
Gas security incident and electrical fire, and user can select use low-voltage protection function, can enter in the peak of power consumption period
Row normal illumination, it is ensured that daily life electricity consumption.
The technical solution adopted in the utility model is：A kind of low-pressure multi-functional safeguard protection distribution box, including power supply transformation
Current rectifying and wave filtering circuit, overvoltage sampling detection circuit, under-voltage sampling detection circuit, overload short circuit sampling trigger circuit, electric leakage sampling
Triggers circuit, under-voltage channel selector switch, delay circuit, connect triggers circuit, cut-out triggers circuit, differential circuit and high-power
Magnetic latching 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, greatly
The coil crossover of power magnetic latching relay the bridge circuit colelctor electrode two-by-two be connected between, power magnetic force keeping relay
Contact be connected on general supply incoming line, and general supply end is separated with total load end；Power supply Transformer Rectifier is filtered
The input connection of circuit from general supply end, 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,
Inverter output point two-way：Delay circuit is connected all the way, and delay circuit output end is reconnected connects triggers circuit, connects triggering
Circuit output end connects a transistor base of differential circuit；Another road connection cut-out triggers circuit of inverter output, cuts
Disconnected triggers circuit output end connects another transistor base of differential circuit；Under-voltage sampling detection circuit output end is through under-voltage logical
Equally divide two-way after road selecting switch：Delay circuit is connected to all the way, and delay circuit is reconnected connects triggers circuit, connects triggering
Circuit output end connects a transistor base of differential circuit, and another road connection cut-out triggers circuit, cut-out triggers circuit is defeated
Go out another transistor base of end connection differential circuit；Overload short circuit sampling trigger circuit input is connected to total load end fire
Current transformer on line, overload short circuit sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output
Another transistor base of end connection differential circuit；The input of electric leakage sampling trigger circuit is connected from total load end power line
Zero sequence current mutual inductor, electric leakage sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connects
Connect another transistor base of differential 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 present utility model can enter before to total load combined floodgate power transmission to total loop
Row self-recovering type is crossed, under-voltage preliminary examination protection, after total load is powered operation, mistake, the under-voltage failure that can occur to total loop
Carry out self-recovering type and examine protection online, breaking online inspection protection is carried out to overload, short circuit, leak current fault, to each branch circuit load
Overload, the short trouble of generation carry out breaking online inspection protection respectively, to total loop not merely with power magnetic force keeping relay
Self-recovering type failure to trip protection is carried out, also manual break-make control is carried out using air switch, and using air switch itself
Overload, the overload that short-circuit protection function occurs to total loop, short trouble carry out duplicate protection, while user can also be according to need
Will, easily choose whether to use low-voltage protection function, and defect content is informed, flashing light alarm is carried out, this just both ensure that
Electrical Safety, and normal electricity consumption is not influenceed.The utility model is directly entered using power magnetic force keeping relay contact to total loop
Row connection is cut off, and its design fully meets technical requirements of the national 3C certifications to distribution box.And the utility model is changed
Existing Multifunctional low voltage distribution box uses the failure to trip mode of small Control magnetic latching relay, and the utility model is direct
Using differential circuit control magnetic latching 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, elegant in appearance, cost performance is high, should vigorously promote the use.Particularly the utility model is provided with under-voltage
Channel selector switch, in peak times of power consumption, many line voltage distributions are too low, but user uses the under-voltage channel selector switch, remains to
Illumination and daily life electricity consumption are realized, the masses are facilitated, is conducive to the popularization and application of the utility model product.
Brief description of the drawings：
Fig. 1 is the utility model electrical principle block diagram；
Fig. 2 is the utility model implementing circuit figure.
The model of integrated circuit used in figure：
IC1、IC2:HT7033A-1; IC3:78L12; IC4、IC5、IC6:NE555
Specific embodiment：
Specific implementation of the present utility model 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 present utility model, including the filtering of power supply Transformer Rectifier
Circuit, overvoltage sampling detection circuit, under-voltage sampling detection circuit, overload short circuit sampling trigger circuit, electric leakage sampling trigger circuit,
Under-voltage channel selector switch, delay circuit, connect triggers circuit, cut-out triggers circuit, differential circuit and high-power magnetic keep after
Electrical equipment；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, and high-power magnetic is protected
Hold relay line bag be connected across the colelctor electrode two-by-two of the bridge circuit be connected between, the contact string of power magnetic force keeping relay
It is associated on general supply incoming line, and general supply end is separated with total load end；Power supply Transformer Rectifier filter circuit it is defeated
Enter end connection from general supply end, 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, phase inverter is defeated
Go out 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
One transistor base of end connection differential circuit；Another road connection cut-out triggers circuit of inverter output, cut-out triggering electricity
Road output end connects another transistor base of differential circuit；Under-voltage sampling detection circuit output end is opened through under-voltage channel selecting
Equally divide two-way behind pass：Delay circuit is connected to all the way, and delay circuit is reconnected connects triggers circuit, connects triggers circuit output
One transistor base of end connection differential circuit, another road connection cut-out triggers circuit, the output end connection of cut-out triggers circuit
Another transistor base of differential circuit；Overload short circuit sampling trigger circuit input is connected to the electricity 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 connection is poor
Another transistor base of dynamic circuit；The input of electric leakage sampling trigger circuit connects the zero sequence from the power line of total load end
Current transformer, electric leakage sampling trigger circuit output end connection cut-out triggers circuit, cut-out triggers circuit output end connection is differential
Another transistor base of circuit.Described general supply end also concatenates having air switch, the overvoltage sampling detection circuit bag
Include the over-pressed sample circuit being made up of over-pressed divider resistance, the over-pressed voltage detector circuit being made up of overvoltage comparison circuit, by
Negative circuit and overvoltage failure indicating circuit that transistor circuit is constituted, above-mentioned over-pressed sample circuit, over-pressed voltage detector
Circuit and negative circuit are sequentially connected, and the under-voltage sampling detection circuit includes the under-voltage sampling electricity being made up of under-voltage divider resistance
Road, the under-voltage detector circuit and under-voltage failure indicating circuit that are made up 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 is included by the electric current on the live wire of total load end
Transformer constitute overload short circuit sample circuit, be made up of the second controllable silicon triggers circuit, by diode, resistance, potentiometer
The rectifying and wave-filtering regulation circuit of composition, above-mentioned current transformer, rectifying and wave-filtering regulation circuit, triggers circuit is sequentially connected, described
Electric leakage sampling 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,
The leakage trigger circuit being made up of the first controllable silicon, the electric leakage current rectifying and wave filtering circuit being made up of diode, resistance, electric capacity, it is above-mentioned
Zero sequence current mutual inductor, electric leakage current rectifying and wave filtering circuit, leakage trigger circuit are sequentially connected, described under-voltage channel selector switch one end
Output end from under-voltage comparison circuit is connected by diode；The other end of under-voltage channel selector switch is divided into two-way：A-road-through
Diode connection delay circuit is crossed, diode connection cut-out triggers circuit is separately led up to, described delay circuit is prolonged by capacitance-resistance
When parametric circuit and integrated circuit NE555 connect and compose, described connection triggers circuit is by transistor switching circuit and integrated electricity
Road NE555 is connected and composed, and the cut-out triggers circuit is connected and composed by transistor switching circuit and integrated circuit NE555, described
The electric routing resistance R2 of overvoltage sampling detection, R6, R7, R8, potentiometer W1, triode V1, light emitting diode FD3 and overvoltage inspection
Survey device IC2 to constitute, described under-voltage sampling detects electric routing resistance R3, R4, R5, potentiometer W2, light emitting diode FD2 and owes electricity
Pressure detector IC1 is constituted, 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 leakage
Electric 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 light emitting diode FD 4 and first constitute, the delay circuit by resistance R9, R10, R11, electric capacity C3, C4,
IC 4 is 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, described differential circuit 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, triode V4, V6
Colelctor electrode be connected, the colelctor electrode of triode V5, V7 is connected, and the base stage of triode V4 passes through resistance R30, voltage-regulator diode DW 1
Colelctor electrode with triode V5 is connected, and the base stage of triode V5 is by resistance R31, voltage-regulator diode DW 2 and the collection of triode V4
Electrode is connected, and power magnetic force keeping relay line bag two ends are connected on triode V4 colelctor electrodes and V5 colelctor electrodes；And three
The base stage of pole pipe V6 is connected to the output end of cut-out triggers circuit, and the base stage of triode V7 is connected to the output for connecting triggers circuit
End.
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 two poles
There is provided DC supply to the utility model after pipe D1-D4 rectifications, electric capacity C1 filtering, in total loop without mistake, under-voltage failure
In the case of, 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 electricity high
It is flat, diode D5 cut-offs, conversion voltage of the first input pins of overvoltage detector IC2 voltage less than IC2, the output pins of IC2 second
It is low level, triode V1 cut-offs, the current collection extremely high level of V1, diode D6 cut-offs, delay integrated circuit IC4 second is triggered
Voltage >=2/3 supply voltage of pin, IC4 will be after being powered up stable state by temporary regime shift, and temporary stable state is held time, by
The resistance of resistance R11 and the capacity of electric capacity C3 determine that the capacity of the resistance or C3 that change R11 just can the reasonable selection temporary stable states of IC4
Hold time, IC4 be in temporary stable state during, the output pins of IC4 the 3rd be high level, triode V2 saturation conductions, monostable electricity
Road IC5 does not have working power, and after IC4 enters stable state, the output pins of IC4 the 3rd are changed into low level, and V2 ends, IC5 energization work,
It is first stable state by temporary regime shift, changes the temporary stable state dimension of the resistance of resistance R14 or the capacity of electric capacity C6 with regard to energy reasonable selection IC5
The time is held, during IC5 is in temporary stable state, the output pins of IC5 the 3rd are high level, and triode V7 and V4 conducting, high-power magnetic are protected
Hold the pin of coil first of relay J1 to switch on power anode through V4, the coil crus secunda of J1 switches on power negative terminal through V7, J1 because plus
Upper positive pulse voltage and transition status, two groups of contact J1-1 and J1-2 of J1 are converted to closure state, do not have in J1 by off-state
Have before adding negative pulse voltage, its contact will be always maintained at this closure state, the general supply end of total loop and total load are terminated
It is 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, to total loop
The overload of generation, short trouble and leak current fault are examined open circuit protection online, and the overload for also occurring to each load branch is short
Road failure carries out open circuit protection respectively.
Defencive function principle of the present utility model is respectively described below below：
Self-recovering type overvoltage 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 overvoltage failure, the utility model will be refused to give total load end combined floodgate power transmission, and total load is being connected at such as general supply end
There is overvoltage failure behind end, the utility model sets the power supply at cut-out total load end immediately with the electricity consumption for ensureing total load end
It is standby not burnt out because of overtension, it is to avoid because overtension and caused by electrical safety accident and electrical fire.When general supply end electricity
After drops recover normal, the utility model will be automatic logical by general supply end and total load termination in 30s, to ensure just to commonly use
Electricity.Its operation principle is：When total current terminal voltage is too high, transformer-secondary voltage is also too high therewith.Through diode D1-D4,
Voltage after electric capacity C1 rectifying and wave-filterings is also and then too high, and the voltage of the input pins of voltage detector IC2 first is similarly and then too high,
When the voltage of the input pins of IC2 first is higher than the conversion voltage of IC2, the output pins of IC2 second are changed into high level, three poles from low level
Pipe V1 is turned on, and the colelctor electrode of V1 is changed into low level from high level, and overvoltage malfunction indicator lamp FD3 is powered and brightens, diode D6, D7
With D8 conductings, triode V3 conductings, alarm flashing diode FD6 is powered flash of light, IC6 energizations work by temporary stable state enter stable state,
During temporary stable state, the output pins of IC6 the 3rd are high level, triode V6 and V5 conducting, the line of power magnetic force keeping relay J1
Circle crus secunda switches on power anode through V5, and the pin of coil first of J1 switches on power negative terminal through V6, and J1 adds negative pulse voltage, so
When general supply end also access failure total load end（Preliminary examination is protected）, two groups of contacts J1-1 and J1-2 of J1 will continue to be locked in disconnection
State, such as now general supply end has been turned on total load end（Load circuit is in the operating online inspection protection that is powered）, then the two of J1
Group contact J1-1 and J1-2 will be converted to off-state by closure state immediately, and the utility model is immediately by general supply end and always negative
End cut-out is carried, meanwhile, after diode D8 conductings, the voltage of the triggering pin of IC4 second will be less than 1/3 supply voltage, and IC3 the 3rd is exported
Pin is electricity rate high, triode V2 saturation conductions, IC5 because without normal working voltage without working.When general supply terminal voltage declines
After recovering normal, the conversion voltage value of the voltage less than IC2 of the input pins of overvoltage detector IC2 first.The output pins of IC2 second by
High level is changed into low level, and triode V1 is changed into cut-off from turning on, and the colelctor electrode of V1 is changed into high level, overvoltage event from low level
The FD3 power-off of barrier indicator lamp is extinguished, and diode D6, D7 and D8 are changed into cut-off from conducting, and triode V3 is also changed into cut-off from conducting,
Alarm flashing diode FD6 power-off is extinguished, and IC6 working powers are cut off and are stopped, the triggering pin voltages of IC4 second become again for
Voltage originally, >=2/3 supply voltage, after temporary stable state terminates to enter stable state, the output pins of IC4 the 3rd are changed into IC4 from high level
Low level, triode V2 is changed into cut-off from saturation conduction, and IC5 energization work is changed into stable state from temporary stable state, during temporary stable state,
The output pins of IC5 the 3rd are high level, triode V7, V4 conducting, and power magnetic force keeping relay J1 is because plus positive pulse voltage
Transition status, two groups of contacts J1-1, J1-2 of J1 are converted to closure state and terminate general supply end and total load by off-state
It 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, the utility model will be refused to give total load end combined floodgate power transmission, and total load is being connected at such as general supply end
There is under-voltage failure, the utility model after end by the power supply at cut-out total load end immediately.To ensure the electricity consumption at total load end
Equipment is not damaged because of brownout.So as to avoid electrical safety accident and the electrical fire caused by brownout.When total electricity
After source voltage terminal rises and recovers normal, the utility model will in 30S it is automatic by general supply end and total load termination it is logical, ensuring
Normal electricity consumption；In the case where peak times of power consumption, line voltage are too low, user can also first close the electricity consumption of low-voltage easy burn-out and set
It is standby, again by under-voltage functional select switch disable low-voltage protection function, with ensure under low voltage condition using illumination etc.
Equipment.Its operation principle is：When general supply terminal voltage is too low, transformer-secondary voltage is also too low therewith, whole through D1-D4, C1
Also and then the voltage of too low, voltage detector the input pins of IC1 first is similarly and then too low to flow filtered voltage.Work as IC1
When first pin voltage is less than the conversion voltage value of IC1, the output pins of IC1 second are changed into low level from high level, and under-voltage failure refers to
Show that lamp FD2 is powered to brighten, diode D5, D7 and D8 conducting, triode V3 conductings, the FD6 energization flashes of light of alarm flashing diode,
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, power magnetic force keeping relay J1 adds negative pulse voltage.Such as now general supply end also access failure total load end, the two of J1
Group contact J1-1 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, two groups of contacts J1-1 and J1-2 of J1 will be converted to off-state by closure state immediately（Online inspection protection）, this practicality is newly
Type immediately cuts general supply end and total load end；After diode D8 conductings simultaneously, the triggering pin voltages of IC4 second will be less than 1/3
Supply voltage, the output pins of IC4 the 3rd are high level, triode V2 saturation conductions.IC5 is because no normal working voltage is without work
Make.After general supply terminal voltage rises recovers normal, the output valve of Transformer Rectifier filter circuit also rises therewith recovers normal, when
When under-voltage detector IC1 the first input pin voltages rise to the conversion voltage value of IC1, the output pins of IC1 second are become by low level
For high level, under-voltage fault indicator lamp FD2 power-off extinguish, diode D5, D7 and D8 from turn on be changed into cut-off, triode V3 also by
Conducting is changed into cut-off, and the FD6 power-off of alarm flashing diode is extinguished.IC6 working powers are cut off and are stopped.IC4 crus secundas
Voltage returns to original >=2/3 supply voltage.After temporary stable state terminates to enter stable state, the pin of IC4 the 3rd are changed into low to IC4 from high level
Level.V2 is changed into cut-off from saturation conduction；IC5 energization work, stable state, IC5 the 3rd pin during temporary stable state are changed into from temporary stable state
Be output as high level, triode V7 and V4 conducting, power magnetic force keeping relay J1 because plus positive pulse voltage transition status,
Two groups of contacts J1-1 and J1-2 of J1 are 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 utility model is by the power supply at cut-out total load end immediately ensuring use electric line and the electricity consumption at total load end
Equipment does not burn out because of overload short circuit failure, preventing electric fire.Its operation principle is：When total load end occurs overload, short circuit
During failure, 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
Greatly, this electric current is through diode D14, D15, resistance R24, R23, potentiometer W3, electric capacity C13, C14 triggering controllable silicon T2 conductings, T2
Anode low level is changed into from high level, overload, short trouble indicator lamp FD5 be powered brighten, diode D12 conductings, triode
V3 conductings, alarm flashing diode FD6 are powered and glisten, and IC6 is powered and enters stable state by temporary stable state, and IC6 is the 3rd during temporary stable state
The high level of pin output turns on triode V6 and V5, power magnetic force keeping relay J1 adds negative pulse voltage J1 conversion works
State, two groups of contacts J1-1 and J1-2 of J1 are converted to off-state by closure state immediately.The utility model immediately will total electricity
Source and total load end cut off.Change the resistance of adjustable resistance W3, it is possible to adjust the setting value of total load end overload action.
After each branch road connects the normal power-up operation of total load end, such as there is overload, short trouble in a certain branch road, and the air of the branch road is opened
Pass directly cuts off the branch circuit load end and total load end, and other trouble-free branch roads will energization operation as usual.
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 utility model will immediately cut off the power supply at total load end, to ensure personal safety, prevent electrical grounding fire.Its work
It is as principle：When total load end occurs leak current fault, two total loop wires through zero sequence current mutual inductor ZCT1 are flowed through
Electric current will be uneven, ZCT1 times level ZCT1-2 will produce the difference between current that induced-current and two total loop wires flow through
Value is bigger, the electric current of ZCT1-2 sensings is also bigger.When leakage current reaches setting value, the electric current of ZCT1-2 sensings is 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.Electric leakage
Malfunction indicator lamp FD4 is powered and brightens, diode D13 conductings, triode V3 conductings, the FD6 energization flashes of light of alarm flashing diode,
IC6 is powered and 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.
Power magnetic force keeping relay J1 adds negative pulse voltage, J1 conversion work states.Two groups of contacts J1-1 and J1-2 of J1 are immediately
Off-state is converted to by closure state.The utility model immediately cuts off general supply end and total load end.Rationally change resistance
The resistance of 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 |
|---|---|---|---|
| CN201621392350.8U CN206293788U (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 |
|---|---|---|---|
| CN201621392350.8U CN206293788U (en) | 2016-12-19 | 2016-12-19 | Low-pressure multi-functional safeguard protection distribution box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293788U true CN206293788U (en) | 2017-06-30 |
Family
ID=59105517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621392350.8U Withdrawn - After Issue CN206293788U (en) | 2016-12-19 | 2016-12-19 | Low-pressure multi-functional safeguard protection distribution box |
Country Status (1)
| Country | Link |
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| CN (1) | CN206293788U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478277A (en) * | 2020-04-13 | 2020-07-31 | 扬州乐军电子科技有限公司 | Control system of air-cooled cabinet power supply |
-
2016
- 2016-12-19 CN CN201621392350.8U patent/CN206293788U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478277A (en) * | 2020-04-13 | 2020-07-31 | 扬州乐军电子科技有限公司 | Control system of air-cooled cabinet power supply |
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