CN205986100U - Multifunctional distribution box - Google Patents

Abstract

The utility model provides a multifunctional distribution box, total return circuit concatenates at middle general supply end and the total load end that divide into total return circuit because of control circuit, the live wire of each branch road load end all passes through respective air switch and connects on the live wire that the total load in total return circuit was held, all directnesses and connecing on the zero line of total load end of zero line, vary voltage rectification filter circuit's input is connected to the general supply end, overvoltage preliminary examination and examine the protection circuit on line, undertension preliminary examination and the sampling end of examining the protection circuit on line all are connected to vary voltage rectification filter circuit's output, the sampling end of crossing current short circuit protection circuit and leakage protection circuit is all connected and is served in the total load in total return circuit, their output all is connected to control circuit. The utility model discloses the installation is simple, and production cost hangs down convenient to use, and protect function is comprehensive, and the sexual valence relative altitude is accepted by users at large.

Description

Multifunctional distribution box

Technical field

This utility model is related to a kind of distribution protection equipment of electric terminal user and in particular to a kind of Multifunctional power distribution Case.

Background technology

The distribution box great majority of existing electric terminal user are all to be formed with air switch and leak protector on-site consolidation, Not only trouble is installed, affects indoor beauty, and defencive function single it is easy to cause electrical safety accident and electrical fire. Chinese patent 200920259239.5 and 201420709331.8 each provides a kind of " Domestic intelligent distribution box " and " low pressure intelligence Distribution box can be protected " although solving the problems referred to above, and there is intelligent protection function, but because structure is more complicated, raw material becomes This is higher, and producing cost is larger, and only a small amount of high-end user can accept, and popularization and application are more difficult.

Content of the invention

Technical problem to be solved in the utility model is：Solve the problems, such as above-mentioned prior art, and one kind is provided Have a road input, multiple-channel output, at the scene install before by all highly integrated to air switch and various control defencive function be one The multifunctional distribution box of body, energising before to electrical network exist overvoltage, under-voltage fault locking total load end power supply pre- Inspection protection, the fault cut-out such as the overvoltage after energising runs, total loop being occurred, under-voltage, overcurrent, short circuit, electric leakage is always born The total loop carrying end power supply examines protection online, and the overcurrent that each branch road is occurred, short trouble difference disengagement failure branch road are electric The branch road in source examines protection online, and indicates defect content, flashing light alarm；Multifunctional distribution box installs simple, easy to use, protection Complete function, cost performance is high.

This utility model adopts the technical scheme that：A kind of multifunctional distribution box, during total loop is serially connected in because of control circuit Between and be divided into main power end and the total load end of total loop, the live wire at each branch circuit load end is through respective air switch It is connected on the live wire at total load end of total loop, zero line is all directly attempted by the zero line at total load end, Transformer Rectifier filtered electrical The input on road connects main power end, overvoltage preliminary examination and online inspection protection circuit, under-voltage preliminary examination and online inspection protection circuit Sampling end be connected to the outfan of Transformer Rectifier filter circuit, the adopting of overcurrent short-circuit protection circuit and leakage protection circuit Sample end is all connected on the total load end of total loop；The outfan of overcurrent short-circuit protection circuit and leak protection circuit all connects To control circuit.

In technique scheme, described overvoltage preliminary examination and online inspection protection circuit are by bleeder circuit, voltage detector Circuit and overvoltage failure indicating circuit connect and compose, and bleeder circuit connects to the outfan of Transformer Rectifier filter circuit, carries out Overvoltage samples, and overvoltage preliminary examination is connected to the base of the 4th audion of control circuit with the outfan of online inspection protection circuit Pole, the 4th audion is serially connected in control circuit first relay circuit, the work of first Control the second relay State, and the second relay controls the break-make of total loop.

In technique scheme, described under-voltage preliminary examination and online inspection protection circuit are by bleeder circuit, voltage detector electricity Road and under-voltage failure indicating circuit connect and compose, and bleeder circuit connects the outfan of Transformer Rectifier filter circuit, carry out owing electricity Pressure sampling, under-voltage preliminary examination is connected to the base stage of the 4th audion of control circuit with the outfan of online inspection protection circuit.

In technique scheme, described leakage protection circuit by zero sequence current mutual inductor, the first controllable silicon, diode, Rc filter circuit and leak current fault indicating circuit connect and compose, and the live wire at total loop total load end and zero line are also cross zero sequence Current transformer, the secondary output of zero sequence current mutual inductor connects after diode rectification, capacitance-resistance filter regulation circuit can to first Control silicon control pole, and the first controllable silicon anode is connected to the base stage of the 4th audion of control circuit.

In technique scheme, described overcurrent short-circuit protection circuit is by current transformer, the second controllable silicon, two poles Pipe, capacitance-resistance filter adjust circuit and overcurrent, short trouble indicating circuit connect and compose, and it is total that current transformer is arranged on total loop On the live wire of load end, secondary transformer output adjusts circuit through diode rectification, capacitance-resistance filter and is followed by second controlled The control pole of silicon, and the second controllable silicon anode is connected to the base stage of the 4th audion of control circuit.

In technique scheme, described control circuit is connected and composed by J1, J2, V4, D9, D8, R17, C6, C7, and the 4th The base stage of individual audion is respectively connected to under-voltage preliminary examination and online inspection protection electricity after the 8th diode, the 17th resistance Road, overvoltage preliminary examination and the online outfan examining protection circuit, overcurrent short-circuit protection circuit and leakage protection circuit, the 4th After audion and first relay series connection, two ends are connected to anode and the negative terminal of Transformer Rectifier filter circuit output power supply Between, second group of contact of the first relay directly controls the break-make of the second relay line bag power supply, and the two of the second relay Group contact controls the break-make between total loop main power end and total load end.

In technique scheme, each described load branch has an air switch, each air switch upper End is all connected on the live wire at total load end, and lower end is respectively connected on the live wire of each load branch, due to air switch itself There is overcurrent, short-circuit protection function, the therefore overcurrent of each load branch, short-circuit protection task is just opened by respective air Close and to complete.

Advantage and effect：

This utility model before to total load combined floodgate power transmission, total loop is carried out self-recovering type cross, under-voltage preliminary examination protection, After total load energising runs, to total load, the overvoltage occurring, under-voltage fault carry out self-recovering type on-line checking protection, mistake Electric current, short circuit, leak current fault examine open circuit protection online, to the overcurrent of each branch circuit load generation, short trouble individually Examined open circuit protection online, also inform defect content, flashing light alarm, this just both ensure that Electrical Safety simultaneously, and do not affect Normal electricity consumption.This utility model is reasonable in design, and integrated level is high, multiple functional, easy to use, and safety is attractive in appearance, and cost performance is high, is worth Widely popularize application.

Brief description：

Fig. 1 is this utility model electrical principle block diagram；

Fig. 2 is this utility model housing cover installation diagram；

Fig. 3 is this utility model housing base installation diagram；

Fig. 4 is this utility model implementing circuit figure.

The model of integrated circuit used by figure：IC1、IC2：HT7033A-1

Specific embodiment：

It is embodied as being described further to of the present utility model below in conjunction with the accompanying drawings：

Referring to Fig. 1, total loop is divided into main power end and the total load end of total loop because control circuit is serially connected in centre, respectively The live wire at individual branch circuit load end will be on the live wire at total load end that respective air switch is connected to total loop, each The zero line of road load end will be directly parallel on the zero line at total load end, and voltmeter and Transformer Rectifier filter circuit are all connected to always The main power end in loop, overvoltage preliminary examination and online inspection protection circuit, under-voltage preliminary examination and the online sampling end examining protection circuit All it is connected to Transformer Rectifier filter circuit, its outfan is all connected to control circuit, overcurrent short-circuit protection circuit and earth leakage protective electricity The sampling end on road is all connected to the total load end of total loop, and its outfan is all connected to control circuit.

Referring to Fig. 2, Fig. 3, this utility model be one kind to before the combined floodgate power transmission of total load end, total loop was carried out, under-voltage After self-recovering type preliminary examination protection, combined floodgate transmission operation, total loop and each branch road are carried out respectively with comprehensive online inspection protect, together When inform the multifunctional distribution box of defect content, flashing light alarm.It is mainly by the main power controlling switch on casing, casing, electricity Pressure table, display lamp, latch-in relay, current transformer, zero sequence current mutual inductor, air switch, turnover binding post, automatically controlled Plate electrical coupling is constituted.Its feature is：Box Cover 1 is provided with main power controlling switch 10, voltmeter 2, power supply indicator 3, owes Voltage failure display lamp 4, overvoltage malfunction indicator lamp 5, flash alarm lamp 6, leak current fault display lamp 7, overcurrent short trouble Display lamp 8, each branch road air switch plate 9, are provided with electric power incoming line terminal 12, current transformer 13, each branch road in cabinet base 11 Air switch 15, each branch road outlet terminal 16, zero sequence current mutual inductor 17, the magnetic latching relay 18 of control circuit and electric-controlled plate 14, electric-controlled plate 14 be provided with Transformer Rectifier filter circuit, overvoltage preliminary examination and online inspection protection circuit, under-voltage preliminary examination with online Inspection protection circuit, overcurrent short-circuit protection circuit, leakage protection circuit and flash alarm circuit.

Referring to Fig. 4, the circuit composition of the present embodiment is：Overvoltage preliminary examination and online inspection protection circuit by resistance R2, R3, R7, R15, electric capacity C2, diode D5, light emitting diode FD4, audion V3 and voltage detector IC2 are constituted, under-voltage preliminary examination with Online inspection protection circuit is by resistance R4, R5, R8, R9, R10, R11, R12, R13, electric capacity C4, light emitting diode FD3, audion V1 Constitute with voltage detector IC1, overvoltage preliminary examination examines protection circuit and under-voltage preliminary examination and online inspection protection circuit with online Sampling end is all connected to the outfan of Transformer Rectifier filter circuit.Leakage protection circuit by zero sequence current mutual inductor ZL1, resistance R16, R18, electric capacity C8, C9, diode D10, D11, light emitting diode FD5 and controllable silicon T1 are constituted, the live wire at total loop total load end With zero line also cross zero sequence current mutual inductor ZL1, the secondary ZL1-2 of zero sequence current mutual inductor ZL1 is connected across earth leakage protective electricity The input on road.Overcurrent short-circuit protection circuit by current transformer ZL2, resistance R19, R20, adjustable resistance W, diode D12, D13, electric capacity C5, C10, light emitting diode FD6 and controllable silicon T2 are constituted, and the live wire at total loop total load end passes through current transformer ZL2, the secondary ZL2-2 of current transformer are connected across the input of overcurrent, short-circuit protection circuit.Control circuit by resistance R12, R14, R17, electric capacity C3, C6, C7, diode D8, D9, flashing diode FD2, audion V2, V4, relay J1, J2 are constituted, the Two groups of contact J2-1 and J2-2 of two relay J2 are serially connected in the middle of the live wire of total loop and in the middle of zero line respectively.Mains transformer The primary of B is connected across between live wire and the zero line at total loop main power end after on and off switch K, and secondary is connected to rectifying and wave-filtering electricity Road, power supply indicator FD1, are connected across the outfan of Transformer Rectifier filter circuit after current-limiting resistance R1.

After power turn-on switch K, transformator B energising work, the low AC voltage of B level output is through diode D1-D4 There is provided DC supply to this utility model after rectification, electric capacity C1 filtering, no cross in total loop power end, under-voltage fault In the case of, the voltage of voltage detector IC1 first input pin detecting for under-voltage is higher than the conversion voltage of IC1, IC1 second Output pin be high level, for Zenith tracking voltage detector IC2 first input pin voltage be less than IC2 conversion electricity Pressure, IC2 second output pin is low level, and audion V3 ends, and controllable silicon I1 and I2 is also in cut-off because of Triggerless State, electric capacity C3 starts to charge up, and audion V2 turns on, and audion V4 ends, and the charging current with electric capacity C3 is gradually reduced, Audion V2 changes cut-off state by conducting state, and V4 is converted to conducting state, relay J1 energising adhesive, J1 by cut-off state Two groups of contact J1-1 and J1-2 conversion, the normally opened contact closure of J1-1, electric capacity C3 through resistance R14 repid discharge, for next time Audion V2 conducting is ready, and the normally-closed contact of J1-1 disconnects, and flash alarm lamp FD2 power-off stops flashing light alarm, J1-2's Normally opened contact closes, and electric current, through D9 →-J1-1, normally opened contact → J2 → C7 → ground, makes the second relay add that positive pulse turns Change state, this closure state, the main power end of total loop and total load end will be always maintained at before J2 does not add negative pulse Connect, and start total loop to be occurred overvoltage fault and under-voltage fault carry out self-recovering type and examine protection online, to total loop The leak current fault of generation, overcurrent, short trouble carry out open circuit protection, the overcurrent also each branch road being occurred, short trouble Carry out open circuit protection respectively.

Specific circuit operation principle is as follows：

Under-voltage self-recovering type is protected：During power turn-on switch K, there is under-voltage fault, this utility model in such as total loop By refusal to total load end combined floodgate power transmission, after the logical main power of total load termination runs, there is under-voltage fault, this reality in total loop With the new power supply being cut off total load end immediately, do not damaged because of brownout with the electrical equipment ensureing total load end, from And avoid the electrical safety accident because brownout causes and electrical fire accident.After total loop voltage recovers normal, this reality With new will in 15S automatically will total load end and main power termination logical, to guarantee normal electricity consumption.Its operation principle is：When total During power end brownout, transformer-secondary voltage is also too low therewith, and the voltage after D1-D4, C1 rectifying and wave-filtering was also followed Low, the voltage of voltage detector IC1 first input pin is similarly and then too low, when IC1 the first foot voltage is less than the conversion electricity of IC1 During pressure, IC1 the second output pin high level and be low level, audion V1 from conducting be changed into end, under-voltage malfunction indicator lamp FD3 Energising brightens, if in power turn-on switch K, also in conducting state, the 4th audion V4 is also for second audion V2 Do not turn on, main power end yet access failure total load end, then make V4 be continually maintained in cut-off state.If the 4th audion V4 is In the conduction state, main power end has been turned on total load end, then make V4 be changed into cut-off state by conducting state, the first relay Power-off discharges, two groups of contact J1-1 and J1-2 conversions of J1, the normally-closed contact closure of J1-1, and flash alarm indicating lamp FD2 is energized Flash of light, the normally-closed contact closure of J1-2, electric capacity C7 gives the second relay J2 electric discharge, and J2 because changing shape plus negative pulse voltage State, two groups of contact J2-1 and J2-2 of J2 are converted to off-state by closure state, and this utility model is born and always main power end Carry end cut-out.Determine under-voltage action setting value according to actual needs, further according to under-voltage action setting value reasonable selection resistance The resistance of R4, R5 and the conversion voltage value of voltage detector IC1.After main power terminal voltage rises and returns to normal, become repoussage The output valve of stream filter circuit also rises therewith and recovers normal, when the voltage of voltage detector IC1 first input pin rises to IC1 Conversion voltage value when, IC1 second output pin is changed into high level from low level, and audion V1 turns on, under-voltage malfunction indicator lamp FD3 power-off is extinguished, and the charging current of electric capacity C3 temporarily makes audion V2 turn on, with being gradually reduced of C3 charging current, V2 Gradually cut-off state is changed into by conducting state, the collector voltage of V2 is also gradually increasing, when V2 ends, audion V4 leads Logical, relay J1 energising adhesive, two groups of contact J1-1 and J1-2 conversions of J1, the normally-closed contact of J1-1 disconnects, and flashing light alarm refers to Show that lamp FD2 power-off stops flash of light, normally opened contact closes, so that electric capacity C3 is discharged through resistance R14 that the normally opened contact closure of J1-2 makes Second relay J2 transition status plus positive pulse voltage, two groups of contact J2-1 and J2-2 of J2 are converted to by off-state and close Conjunction state, total load end is connected with main power section.Overvoltage self-recovering type is protected：During power turn-on switch K, such as main power section There is overvoltage fault before connecting total load end, this utility model will be refused to total load end combined floodgate power transmission.As always electricity There is overvoltage fault in source after connecting total load end, this utility model is cut off the power supply at total load end immediately, to ensure The electrical equipment at total load end does not burn out because of overtension, it is to avoid cause because of overtension electrical safety accident and electrically fire Calamity accident.After the decline of main power terminal voltage recovers normal, this utility model will be automatically by main power end and total load in 15S Termination is logical, to guarantee normal electricity consumption.Its operation principle is：When main power terminal voltage is too high, transformer-secondary voltage is also therewith Too high, the voltage after diode D1-D4, electric capacity C1 rectifying and wave-filtering is also and then too high, for the voltage detecting of Zenith tracking The voltage of device IC2 first input pin is similarly and then too high, when IC2 the first input pin voltage is higher than IC2 conversion voltage, IC2 Second output pin is changed into high level from low level, the 3rd audion V3 conducting, and the energising of overvoltage malfunction indicator lamp FD4 brightens. If the 4th audion V4 does not also turn at this moment, V4 is made to be continually maintained in cut-off state, if V4 locates before this In conducting state, then V4 is made to be changed into cut-off state from conducting state, the first relay J1 power-off release, the second relay J2 is because negative Pulse voltage acts on and transition status, and two contact J2-1 and J2-2 of J2 are converted to off-state by closure state, and this practicality is new Main power end and total load end are cut off by type immediately.Determine overvoltage action setting value according to actual needs, further according to overvoltage The resistance of action setting value reasonable selection R2, R3 and the conversion voltage value of voltage detector IC2.When the decline of main power terminal voltage is extensive After answering normally, the voltage of voltage detecting IC2 first input pin is less than the conversion voltage value of IC2, and IC2 second output pin is by high level It is changed into low level, audion V3 is changed into ending from conducting, and overvoltage malfunction indicator lamp FD4 power-off is extinguished, V4 Delayed conducting, and J1 leads to Electric adhesive, J2 is converted to by off-state and closes because of the transition status plus positive pulse voltage, two groups of contact J2-1 and J2-2 of J2 Conjunction state, will be logical to total load end and main power termination.

Leakage, breaking is protected：After total load termination logical main power end normal power-up is run, leak electricity in such as total load end Fault, this utility model is cut off the power supply at total load end immediately, to ensure personal safety, prevents electrical grounding fire.Its work As principle it is：When total load end occurs leak current fault, flow through two total loop wires through zero sequence current mutual inductor ZL1 Electric current will be uneven, and ZL1 level will produce faradic current, and the current differential that two total loop wires flow through is bigger, ZL1 The faradic current producing is also bigger.When leakage current reaches setting working value, the faradic current warp of ZL1 level ZL1-2 generation Diode D10, D11, resistance R18, electric capacity C8, C9 triggering controllable silicon T1 conducting, the anode of T1 is changed into low level from high level, leakage Electric fault display lamp FD5 energising brightens.Audion V4 is changed into ending from conducting simultaneously, and relay J1 power-off discharges, and J2 is because bearing arteries and veins Rush voltage to act on and transition status, two groups of contact J2-1 and J2-2 of J2 are converted to off-state by closure state, this practicality is new Main power end and total load end are cut off by type immediately.The resistance of reasonable selection resistance R18 is so that it may determine the electric leakage action of total load end Setting value.

Overcurrent, short-circuit power-off protection：After total load termination logical main power end normal power-up is run, such as total load end is sent out Raw short circuit, overcurrent fault, this utility model is cut off the power supply at total load end immediately, uses electric line with guarantee total load end Do not burn out, preventing electric fire because of overcurrent short trouble with electrical equipment.Its operation principle is：When total load end occurred When electric current, short trouble, the faradic current that the ZL2 level of current transformer on the live wire of total load end is checked and accepted also will correspondingly increase Greatly, this electric current is through diode D12, D13, resistance R19, R20, adjustable resistance W, electric capacity C5, C10 triggering controllable silicon T2 conducting, T2 Anode low level is changed into from high level, overcurrent, short trouble display lamp FD6 energising brighten, and audion V4 is by turning on simultaneously State is changed into cut-off state, and relay J1 power-off discharges, J2 transition status, two groups of contacts of J2 because negative pulse voltage acts on J2-1 and J2-2 is converted to off-state by closure state, and total load end and main power end are cut off by this utility model immediately.Change Become the resistance of adjustable resistance W it is possible to adjust the setting value of total load end overcurrent action.Connect total load end in each branch road After normal power-up is run, there is overcurrent, short trouble in such as a certain branch road, the air switch of this branch road is directly by this branch circuit load End and the cut-out of total load end, other trouble-free branch roads will be energized operation as usual.

Claims (3)

1. a kind of multifunctional distribution box, total loop is divided into the main power end of total loop and always bears because control circuit is serially connected in centre Carry end, the live wire at each branch circuit load end on the live wire at total load end that respective air switch is connected on total loop, Zero line is all directly attempted by the zero line at total load end, and the input of Transformer Rectifier filter circuit connects main power end, overvoltage Preliminary examination is connected to Transformer Rectifier filtered electrical with online inspection protection circuit, under-voltage preliminary examination and the sampling end of online inspection protection circuit The outfan on road, the sampling end of overcurrent short-circuit protection circuit and leakage protection circuit is all connected to the total load end of total loop On；The outfan of overcurrent short-circuit protection circuit and leakage protection circuit is connected to control circuit；It is characterized in that：Described Overvoltage preliminary examination is connected structure with online inspection protection circuit by bleeder circuit, voltage detector circuit and overvoltage failure indicating circuit Become, bleeder circuit connects to the outfan of Transformer Rectifier filter circuit, carry out overvoltage sampling, overvoltage preliminary examination is protected with online inspection The outfan of protection circuit connects to the base stage of the 4th audion of control circuit, and the 4th audion is serially connected in control circuit first In relay circuit, the working condition of first Control the second relay, and the second relay controls the logical of total loop Disconnected；Described under-voltage preliminary examination and online inspection protection circuit are by bleeder circuit, voltage detector circuit and under-voltage indicating fault electricity Road connects and composes, bleeder circuit connect Transformer Rectifier filter circuit outfan, carry out under-voltage sampling, under-voltage preliminary examination with The outfan of online inspection protection circuit connects to the base stage of the 4th audion of control circuit；Described leakage protection circuit by Zero sequence current mutual inductor, the first controllable silicon, diode, rc filter circuit and leak current fault indicating circuit connect and compose, total time , also cross zero sequence current mutual inductor, the secondary output of zero sequence current mutual inductor is whole through diode for the live wire at road total load end and zero line Stream, capacitance-resistance filter connect to the first SCR control pole after adjusting circuit, and the first controllable silicon anode is connected to control circuit the 4th The base stage of individual audion；Described overcurrent short-circuit protection circuit is by current transformer, the second controllable silicon, diode, capacitance-resistance filter Ripple adjusts circuit and overcurrent, short trouble indicating circuit connect and compose, and current transformer is arranged on total loop total load end On live wire, secondary transformer output adjusts circuit through diode rectification, capacitance-resistance filter and is followed by the second silicon controlled controlling Pole and the second controllable silicon anode are connected to the base stage of the 4th audion of control circuit.

2. multifunctional distribution box according to claim 1 it is characterised in that：Described control circuit by J1, J2, V4, D9, D8, R17, C6, C7 connect and compose, and the base stage of the 4th audion is respectively connected to after the 8th diode, the 17th resistance Under-voltage preliminary examination and online inspection protection circuit, overvoltage preliminary examination and online inspection protection circuit, overcurrent short-circuit protection circuit and leakage After the outfan of electric protection circuit, the 4th audion and first relay series connection, two ends are connected to Transformer Rectifier filtered electrical Between the anode of road output power supply and negative terminal, second group of contact of the first relay directly controls the second relay line bag electricity The break-make in source, and the two of the second relay groups of contacts control the break-make between total loop main power end and total load end.

3. multifunctional distribution box according to claim 1 it is characterised in that：Each described load branch has one Itself there is the air switch of overcurrent, short-circuit protection function, the upper end of each air switch is connected to the fire at total load end On line, lower end is respectively connected on the live wire of each load branch.