CN105958337A - Multi-functional distribution box - Google Patents
Multi-functional distribution box Download PDFInfo
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- CN105958337A CN105958337A CN201610274391.5A CN201610274391A CN105958337A CN 105958337 A CN105958337 A CN 105958337A CN 201610274391 A CN201610274391 A CN 201610274391A CN 105958337 A CN105958337 A CN 105958337A
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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
- H02B1/48—Mounting of devices therein
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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
- H02B1/24—Circuit arrangements for boards or switchyards
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a multi-functional distribution box, a control circuit is connected with a main circuit in series at middle part, so that the main circuit can be divided into a main power supply end and a main load end, a live wire of each branch load end is connected with a live wire of the main load end of the main circuit through corresponding air switch, a neutral wire is directly connected with a neutral wire of the main load end in parallel, the input end of a voltage transformation rectifier and filter circuit is connected with the main power supply end, sampling ends of an overvoltage precheck and online check protection circuit and an undervoltage precheck and online check protection circuit are connected with the output end of the voltage transformation rectifier and filter circuit, and sampling ends of an overcurrent short-circuit protection circuit and an earth leakage protection circuit are connected with the main load end of the main circuit; and the output ends are connected with the control circuit. According to the invention, the multi-functional distribution box has advantage of simple of mounting, low production cost and convenient operation, comprehensive production function and high cost performance and can be accepted by users.
Description
Technical field
The present invention relates to the distribution protection equipment of a kind of electric terminal user, be specifically related to a kind of multifunctional distribution box.
Background technology
The distribution box great majority of existing electric terminal user are all to form with air switch and leak protector on-site consolidation, not only install trouble, affect indoor beauty, and defencive function is single, it is easy to cause electrical safety accident and electrical fire.Chinese patent 200920259239.5 and 201420709331.8 each provides one " Domestic intelligent distribution box " and " low-voltage intelligent protection distribution box "; although solving the problems referred to above; and there is intelligent protection function; but owing to structure is more complicated; the cost of raw material is higher; producing cost is relatively big, and only a small amount of high-end user can accept, and popularization and application are more difficult.
Summary of the invention
The technical problem to be solved is: solve the problem that above-mentioned prior art exists, and provide one to have a road input, multiple-channel output, by air switch and the most highly integrated multifunctional distribution box being integrated of various control defencive function before installing at the scene, the overvoltage before energising, electrical network existed, the preliminary examination protection of under-voltage fault locking total load end power supply, the overvoltage after energising runs, total loop occurred, under-voltage, overcurrent, short circuit, the faults such as electric leakage are cut off the total loop of total load end power supply and are examined protection online, the overcurrent that each branch road is occurred, protection examined online by the branch road of short trouble disengagement failure branch road power supply respectively, and indicate defect content, flashing light alarm；Multifunctional distribution box is installed simple, easy to use, and defencive function is comprehensive, and cost performance is high.
The present invention adopts the technical scheme that: a kind of multifunctional distribution box, total loop is divided into main power end and the total load end of total loop because control circuit is serially connected in centre, the live wire of each branch circuit load end is connected on the live wire of total load end of total loop through respective air switch, zero line is the most directly attempted by the zero line of total load end, the input of Transformer Rectifier filter circuit connects main power end, overvoltage preliminary examination with examine protection circuit online, under-voltage preliminary examination is connected to the outfan of Transformer Rectifier filter circuit with the online sampling end examining protection circuit, the sampling end of overcurrent short-circuit protection circuit and leakage protection circuit is all connected on the total load end of total loop；The outfan of overcurrent short-circuit protection circuit and leak protection circuit is connected to control circuit.
In technique scheme; described overvoltage preliminary examination is connected and composed by bleeder circuit, voltage detector circuit and overvoltage failure indicating circuit with online inspection protection circuit; bleeder circuit is connected to the outfan of Transformer Rectifier filter circuit; carry out overvoltage sampling; overvoltage preliminary examination is connected to the base stage of the 4th audion of control circuit with the online outfan examining protection circuit; 4th audion is serially connected in control circuit the first relay circuit; the duty of first Control the second relay, and the second relay controls the break-make of total loop.
In technique scheme; described under-voltage preliminary examination is connected and composed by bleeder circuit, voltage detector circuit and under-voltage failure indicating circuit with online inspection protection circuit; bleeder circuit connects the outfan of Transformer Rectifier filter circuit; carrying out under-voltage sampling, under-voltage preliminary examination is connected to the base stage of the 4th audion of control circuit with the online outfan examining protection circuit.
In technique scheme; described leakage protection circuit is connected and composed by zero sequence current mutual inductor, the first controllable silicon, diode, rc filter circuit and leak current fault indicating circuit; the live wire of total loop total load end and zero line are also cross zero sequence current mutual inductor; the output of zero sequence current mutual inductor secondary is connected to the first SCR control pole after diode rectification, capacitance-resistance filter regulation circuit, 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 connected and composed by current transformer, the second controllable silicon, diode, capacitance-resistance filter regulation circuit and overcurrent, short trouble indicating circuit; current transformer is arranged on the live wire of total loop total load end; secondary transformer output is followed by the second silicon controlled controlling pole through diode rectification, capacitance-resistance filter regulation circuit, 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 by J1, J2, V4, D9, D8, R17, C6, C7 connects and composes, the base stage of the 4th audion is through the 8th diode, it is respectively connected to under-voltage preliminary examination after 17th resistance and examines protection circuit online, overvoltage preliminary examination with examine protection circuit online, overcurrent short-circuit protection circuit and the outfan of leakage protection circuit, after 4th audion and first relay series connection, two ends are connected between anode and the negative terminal of Transformer Rectifier filter circuit output power supply, 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 groups of contacts control the break-make between total loop main power end and total load end.
In technique scheme; each described load branch has an air switch; the upper end of each air switch is connected on the live wire of total load end; lower end is respectively connected on the live wire of each load branch; owing to air switch itself has overcurrent, short-circuit protection function, therefore the overcurrent of each load branch, short-circuit protection task are just completed by respective air switch.
Advantage and effect:
The present invention is 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; overvoltage that total load occurs, under-voltage fault carry out self-recovering type on-line checking protection, overcurrent, short circuit, leak current fault examine open circuit protection online; overcurrent, short trouble that each branch circuit load occurs examine open circuit protection the most online; the most also inform defect content; flashing light alarm; this the most both ensure that Electrical Safety, does not the most affect normal electricity consumption.The present invention 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, should vigorously promote the use.
Accompanying drawing illustrates:
Fig. 1 is electrical principle block diagram of the present invention；
Fig. 2 is inventive shell cover plate installation diagram；
Fig. 3 is inventive shell base installation diagram；
Fig. 4 is implementing circuit figure of the present invention.
In figure, the model of integrated circuit used is: IC1, IC2:HT7033A-1
Detailed description of the invention:
It is embodied as being described further to the present invention below in conjunction with the accompanying drawings:
See 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, the live wire of each branch circuit load end will be connected on the live wire of total load end of total loop through respective air switch, the zero line of each branch circuit load end will be directly parallel on the zero line of total load end, voltmeter and Transformer Rectifier filter circuit are all connected to the main power end of total loop, overvoltage preliminary examination with examine protection circuit online, under-voltage preliminary examination is all connected to Transformer Rectifier filter circuit with the sampling end of online inspection protection circuit, its outfan is all connected to control circuit, the sampling end of overcurrent short-circuit protection circuit and leakage protection circuit is all connected to the total load end of total loop, its outfan is all connected to control circuit.
See Fig. 2, Fig. 3, the present invention be a kind of to total loop being carried out before total load end combined floodgate power transmission, under-voltage self-recovering type preliminary examination protection, total loop and each branch road carried out respectively after combined floodgate transmission operation comprehensive online inspection protection, inform the multifunctional distribution box of defect content, flashing light alarm simultaneously.It is mainly made up of the main power control switch on casing, casing, voltmeter, display lamp, latch-in relay, current transformer, zero sequence current mutual inductor, air switch, turnover binding post, electric-controlled plate electrical coupling.Its feature is: Box Cover 1 is provided with main power and controls switch 10, voltmeter 2, power supply indicator 3, under-voltage malfunction indicator 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, electric power incoming line terminal 12 it is provided with in cabinet base 11, current transformer 13, each branch road 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 is provided with Transformer Rectifier filter circuit, overvoltage preliminary examination with examine protection circuit online, under-voltage preliminary examination with examine protection circuit online, overcurrent short-circuit protection circuit, leakage protection circuit and flash alarm circuit.
See Fig. 4, the circuit composition of the present embodiment is: overvoltage preliminary examination and online inspection protection circuit are by resistance R2, R3, R7, R15, electric capacity C2, diode D5, light emitting diode FD4, audion V3 and voltage detector IC2 is constituted, under-voltage preliminary examination and online inspection protection circuit are by resistance R4, R5, R8, R9, R10, R11, R12, R13, electric capacity C4, light emitting diode FD3, audion V1 and voltage detector IC1 is constituted, overvoltage preliminary examination is all connected to the outfan of Transformer Rectifier filter circuit with the online sampling end examining protection circuit and under-voltage preliminary examination and online inspection protection circuit.Leakage protection circuit is made up of zero sequence current mutual inductor ZL1, resistance R16, R18, electric capacity C8, C9, diode D10, D11, light emitting diode FD5 and controllable silicon T1; live wire and the zero line of total loop total load end are connected across the input of leakage protection circuit also cross zero sequence current mutual inductor ZL1, the secondary ZL1-2 of zero sequence current mutual inductor ZL1.Overcurrent short-circuit protection circuit is made up of current transformer ZL2, resistance R19, R20, adjustable resistance W, diode D12, D13, electric capacity C5, C10, light emitting diode FD6 and controllable silicon T2; the live wire of total loop total load end is connected across the input of overcurrent, short-circuit protection circuit through current transformer ZL2, the secondary ZL2-2 of current transformer.Control circuit is made up of resistance R12, R14, R17, electric capacity C3, C6, C7, diode D8, D9, flashing diode FD2, audion V2, V4, relay J 1, J2, and two groups of contact J2-1 and J2-2 of the second relay J 2 are serially connected in the middle of the live wire of total loop and in the middle of zero line respectively.The primary of mains transformer B is connected across between live wire and the zero line of total loop main power end after on and off switch K, and secondary is connected to current rectifying and wave filtering circuit, power supply indicator FD1, is connected across the outfan of Transformer Rectifier filter circuit after current-limiting resistance R1.
nullWhen after power turn-on switch K，Transformator B is energized work，The low AC voltage of B level output is through diode D1-D4 rectification、DC supply is provided to the present invention after electric capacity C1 filtering，At total loop power end without mistake、In the case of under-voltage fault，Voltage for voltage detector IC1 first input pin of under-voltage detection is higher than the conversion voltage of IC1，IC1 the second output pin is high level，Voltage for voltage detector IC2 first input pin of Zenith tracking is less than the conversion voltage of IC2，IC2 the second output pin is low level，Audion V3 ends，Controllable silicon I1 and I2 is in cut-off state because of Triggerless，Electric capacity C3 starts to charge up，Audion V2 turns on，Audion V4 ends，Along with the charging current of electric capacity C3 is gradually reduced，Audion V2 is changed cut-off state by conducting state，V4 is converted to conducting state by cut-off state，Relay J 1 is energized adhesive，Two groups of contact J1-1 and J1-2 conversions of J1，The normally opened contact Guan Bi of J1-1，Electric capacity C3 is through resistance R14 repid discharge，Ready for the conducting of audion V2 next time，The normally-closed contact of J1-1 disconnects，Flash alarm lamp FD2 power-off stops flashing light alarm，The normally opened contact Guan Bi of J1-2，Electric current is through D9 →-J1-1，Normally opened contact → J2 → C7 → ground，Make the second relay plus positive pulse and transition status，This closure state will be always maintained at before J2 does not add negative pulse，The main power end of total loop and total load termination are logical，And start that total loop generation overvoltage fault and under-voltage fault are carried out self-recovering type and examine protection online，The leak current fault that total loop is occurred、Overcurrent、Short trouble carries out open circuit protection，The overcurrent also each branch road occurred、Short trouble carries out open circuit protection respectively.
Concrete circuit operation principle is as follows:
Under-voltage self-recovering type is protected: during power turn-on switch K; as total loop exists under-voltage fault; the present invention by refusal to total load end combined floodgate power transmission; after the logical main power of total load termination runs; total loop generation under-voltage fault; the present invention will cut off the power supply of total load end immediately, to ensure that the electrical equipment of total load end is not damaged because of brownout, thus avoids electrical safety accident and the electrical fire accident caused because of brownout.After total loop voltage recovers normally, total load end and main power will be terminated logical, to guarantee normal electricity consumption in 15S by the present invention automatically.Its operation principle is: when main power terminal voltage is too low, transformer-secondary voltage is the most too low, through D1-D4, voltage after C1 rectifying and wave-filtering is the most too low, the voltage of voltage detector IC1 the first input pin is the most too low, when IC1 the first foot voltage is less than the conversion voltage of IC1, IC1 the second output pin high level be low level, audion V1 is become cut-off from conducting, the energising of under-voltage malfunction indicator lamp FD3 brightens, if when power turn-on switch K, second audion V2 is also in conducting state, 4th audion V4 does not also turn on, main power end also access failure total load end, V4 is then made to be continually maintained in cut-off state.If the 4th audion V4 is the most in the conduction state, main power end has been turned on total load end, V4 is then made to be changed into cut-off state by conducting state, first relay power-off release, two groups of contact J1-1 and J1-2 conversions of J1, the normally-closed contact Guan Bi of J1-1, flash alarm indicating lamp FD2 is energized flash of light, the normally-closed contact Guan Bi of J1-2, electric capacity C7 discharges to the second relay J 2, J2 is converted to off-state because of the transition status plus negative pulse voltage, two groups of contact J2-1 and J2-2 of J2 by closure state, and main power end and total load end-grain cutting are broken by the present invention.Determine under-voltage action setting value according to actual needs, rationally select resistance and the conversion voltage value of voltage detector IC1 of resistance R4, R5 further according to under-voltage action setting value.nullAfter the rising of main power terminal voltage returns to normally，It is normal that the output valve of Transformer Rectifier filter circuit rises recovery the most therewith，When the voltage of voltage detector IC1 the first input pin rises to the conversion voltage value of IC1，IC1 the second output pin is become high level from low level，Audion V1 turns on，Under-voltage malfunction indicator lamp FD3 power-off is extinguished，The charging current of electric capacity C3 temporarily makes audion V2 turn on，Along with being gradually reduced of C3 charging current，V2 is the most gradually changed into cut-off state by conducting state，The collector voltage of V2 is also gradually increasing，When V2 ends，Audion V4 turns on，Relay J 1 is energized adhesive，Two groups of contact J1-1 and J1-2 conversions of J1，The normally-closed contact of J1-1 disconnects，Flash alarm indicating lamp FD2 power-off stops flash of light，Normally opened contact closes，Electric capacity C3 is made to discharge through resistance R14，The normally opened contact Guan Bi of J1-2，Make the second relay J 2 plus positive pulse voltage transition status，Two groups of contact J2-1 and J2-2 of J2 are converted to closure state by off-state，Total load end is connected with main power section.Overvoltage self-recovering type is protected: during power turn-on switch K, as main power section exists for overvoltage fault connecting before total load end, the present invention by refusal to total load end combined floodgate power transmission.As main power end occurs overvoltage fault after connecting total load end, the present invention will cut off the power supply of total load end immediately, to ensure that the electrical equipment of total load end does not burns out because of overtension, it is to avoid cause electrical safety accident and electrical fire accident because of overtension.After main power terminal voltage declines recovery normally, main power end and total load will be terminated logical, to guarantee normal electricity consumption in 15S by the present invention automatically.Its operation principle is: when main power terminal voltage is too high, transformer-secondary voltage is the most too high, voltage after diode D1-D4, electric capacity C1 rectifying and wave-filtering is the most too high, the most too high for the voltage of voltage detector IC2 first input pin of Zenith tracking, when IC2 the first input pin voltage changes voltage higher than IC2, IC2 the second output pin is become 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 the most also turn on, V4 is then made to be continually maintained in cut-off state, if V4 is the most in the conduction state, V4 is then made to be become cut-off state from conducting state, first relay J 1 power-off release, second relay J 2 is transition status because of negative pulse voltage effect, and two contact J2-1 and J2-2 of J2 are converted to off-state by closure state, and main power end and total load end are cut off by the present invention immediately.Determine overvoltage action setting value according to actual needs, rationally select resistance and the conversion voltage value of voltage detector IC2 of R2, R3 further according to overvoltage action setting value.After main power terminal voltage declines recovery normally, the voltage of voltage detecting IC2 the first input pin conversion voltage value less than IC2, IC2 the second output pin is become low level from high level, audion V3 is become cut-off from conducting, and overvoltage malfunction indicator lamp FD4 power-off is extinguished, V4 Delayed conducting, J1 is energized adhesive, J2 is converted to closure state because of the transition status plus positive pulse voltage, two groups of contact J2-1 and J2-2 of J2 by off-state, terminates logical by total load end and main power.
Leakage, breaking is protected: after the logical main power end normal power-up of total load termination is run, such as total load end generation leak current fault, the present invention will cut off the power supply of total load end immediately, to ensure personal safety, prevents electrical grounding fire.Its operation principle is: when total load end generation leak current fault, the electric current flowing through two total loop wires through zero sequence current mutual inductor ZL1 will be uneven, ZL1 time level will produce faradic current, and current differential that two total loop wires flow through is the biggest, the faradic current that ZL1 produces is the biggest.When leakage current reaches to set working value, the faradic current of ZL1 level ZL1-2 generation triggers controllable silicon T1 conducting through diode D10, D11, resistance R18, electric capacity C8, C9, and the anode of T1 is become low level from high level, and leak current fault display lamp FD5 energising brightens.Audion V4 is become cut-off from conducting simultaneously, and relay J 1 power-off discharges, and J2 is transition status because of negative pulse voltage effect, and two groups of contact J2-1 and J2-2 of J2 are converted to off-state by closure state, and main power end and total load end are cut off by the present invention immediately.Rationally select the resistance of resistance R18, so that it may determine the setting value of total load end electric leakage action.
Overcurrent, short circuit power-off protection: after the logical main power end normal power-up of total load termination is run; as total load end be short-circuited, overcurrent fault; the present invention will cut off the power supply of total load end immediately; to guarantee not burning out, preventing electric fire by electric line and electrical equipment of total load end because of overcurrent short trouble.Its operation principle is: when total load end generation overcurrent, during short trouble, the faradic current that ZL2 level of current transformer on total load end live wire is checked and accepted also will correspondingly increase, this electric current is through diode D12, D13, resistance R19, R20, adjustable resistance W, electric capacity C5, C10 triggers controllable silicon T2 conducting, the anode of T2 is become low level from high level, overcurrent, short trouble display lamp FD6 energising brightens, audion V4 is become cut-off state from conducting state simultaneously, relay J 1 power-off discharges, J2 is transition status because of negative pulse voltage effect, two groups of contact J2-1 and J2-2 of J2 are converted to off-state by closure state, total load end and main power end are cut off by the present invention immediately.Change the resistance of adjustable resistance W, it is possible to adjust the setting value of total load end overcurrent action.Connecting after total load end normal power-up runs at each branch road, such as a certain branch road generation overcurrent, short trouble, this branch circuit load end and total load end-grain cutting are directly broken by the air switch of this branch road, and other trouble-free branch roads will be energized operation as usual.
Claims (7)
1. a multifunctional distribution box, it is characterized in that: total loop is divided into main power end and the total load end of total loop because control circuit is serially connected in centre, the live wire of each branch circuit load end is connected on the live wire of total load end of total loop through respective air switch, zero line is the most directly attempted by the zero line of total load end, the input of Transformer Rectifier filter circuit connects main power end, overvoltage preliminary examination with examine protection circuit online, under-voltage preliminary examination is connected to the outfan of Transformer Rectifier filter circuit with the online sampling end examining protection circuit, the sampling end of overcurrent short-circuit protection circuit and leakage protection circuit is all connected on the total load end of total loop；The outfan of overcurrent short-circuit protection circuit and leakage protection circuit is connected to control circuit.
Multifunctional distribution box the most according to claim 1, it is characterized in that: described overvoltage preliminary examination and online inspection protection circuit are by bleeder circuit, voltage detector circuit and overvoltage failure indicating circuit connect and compose, bleeder circuit is connected to the outfan of Transformer Rectifier filter circuit, carry out overvoltage sampling, overvoltage preliminary examination is connected to the base stage of the 4th audion of control circuit with the online outfan examining protection circuit, 4th audion is serially connected in control circuit the first relay circuit, the duty of first Control the second relay, and the second relay controls the break-make of total loop.
Multifunctional distribution box the most according to claim 1, it is characterised in that: described under-voltage preliminary examination is connected and composed by bleeder circuit, voltage detector circuit and under-voltage failure indicating circuit with online inspection protection circuit, and bleeder circuit connects
The outfan of Transformer Rectifier filter circuit, the outfan carrying out under-voltage sampling, under-voltage preliminary examination and online inspection protection circuit is connected to the base stage of the 4th audion of control circuit
。
Multifunctional distribution box the most according to claim 1; it is characterized in that: described leakage protection circuit is connected and composed by zero sequence current mutual inductor, the first controllable silicon, diode, rc filter circuit and leak current fault indicating circuit; the live wire of total loop total load end and zero line are also cross zero sequence current mutual inductor; the output of zero sequence current mutual inductor secondary is connected to the first SCR control pole after diode rectification, capacitance-resistance filter regulation circuit, and the first controllable silicon anode is connected to the base stage of the 4th audion of control circuit.
Multifunctional distribution box the most according to claim 1; it is characterized in that: described overcurrent short-circuit protection circuit is connected and composed by current transformer, the second controllable silicon, diode, capacitance-resistance filter regulation circuit and overcurrent, short trouble indicating circuit; current transformer is arranged on the live wire of total loop total load end, and secondary transformer output is followed by the second silicon controlled control pole the second controllable silicon anode is connected to the base stage of the 4th audion of control circuit through diode rectification, capacitance-resistance filter regulation circuit.
Multifunctional distribution box the most according to claim 1, it is characterized in that: described control circuit is by J1, J2, V4, D9, D8, R17, C6, C7 connects and composes, the base stage of the 4th audion is through the 8th diode, it is respectively connected to under-voltage preliminary examination after 17th resistance and examines protection circuit online, overvoltage preliminary examination with examine protection circuit online, overcurrent short-circuit protection circuit and the outfan of leakage protection circuit, after 4th audion and first relay series connection, two ends are connected between anode and the negative terminal of Transformer Rectifier filter circuit output power supply, 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 groups of contacts control the break-make between total loop main power end and total load end.
Multifunctional distribution box the most according to claim 1; it is characterized in that: each described load branch has an air switch; the upper end of each air switch is connected on the live wire of total load end; lower end is respectively connected on the live wire of each load branch; owing to air switch itself has overcurrent, short-circuit protection function, therefore the overcurrent of each load branch, short-circuit protection task are just completed by respective air switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274391.5A CN105958337A (en) | 2016-04-28 | 2016-04-28 | Multi-functional distribution box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274391.5A CN105958337A (en) | 2016-04-28 | 2016-04-28 | Multi-functional distribution box |
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| CN105958337A true CN105958337A (en) | 2016-09-21 |
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| CN201610274391.5A Pending CN105958337A (en) | 2016-04-28 | 2016-04-28 | Multi-functional distribution box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110007175A (en) * | 2019-04-17 | 2019-07-12 | 北京电子工程总体研究所 | A kind of test device |
| CN111122955A (en) * | 2018-10-31 | 2020-05-08 | 宁波方太厨具有限公司 | Overvoltage detection circuit applied to range hood |
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| CN102064515A (en) * | 2009-11-16 | 2011-05-18 | 淳俅 | Domestic intelligent electrical safe power distribution system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111122955A (en) * | 2018-10-31 | 2020-05-08 | 宁波方太厨具有限公司 | Overvoltage detection circuit applied to range hood |
| CN111122955B (en) * | 2018-10-31 | 2021-10-01 | 宁波方太厨具有限公司 | Overvoltage detection circuit applied to range hood |
| CN110007175A (en) * | 2019-04-17 | 2019-07-12 | 北京电子工程总体研究所 | A kind of test device |
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Application publication date: 20160921 |