CN2831567Y - Fire disaster electrical protector - Google Patents
Fire disaster electrical protector Download PDFInfo
- Publication number
- CN2831567Y CN2831567Y CN 200520052262 CN200520052262U CN2831567Y CN 2831567 Y CN2831567 Y CN 2831567Y CN 200520052262 CN200520052262 CN 200520052262 CN 200520052262 U CN200520052262 U CN 200520052262U CN 2831567 Y CN2831567 Y CN 2831567Y
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- China
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- circuit
- line
- fire
- latching relay
- main circuit
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Abstract
The utility model relates to a fire disaster electrical protector and is mainly composed of a shell body, a cover plate, a line inlet line connecting terminal, a line outlet line connecting terminal, a zero sequence current transformer, a miniature current transformer, an electric controlled plate and a latching relay. The fire disaster electrical protector is characterized in that two pairs of normally closed contacting points of the latching relay for controlling the closure / disconnection are respectively connected in series in a fire line and a zero line in a main circuit, and the fire line and the zero line of the main circuit simultaneously penetrate through the zero sequence current transformer. The fire line also penetrates through the miniature current transformer independently, and the electric controlled plate is provided with a power supply circuit and a sampling regulator circuit. A residual current testing circuit composed of a key button and a resistor is cross-over connected between the zero line and the fire line of the front and back parts of the zero sequence current transformer of the main circuit. The protector is provided with the over voltage protection, the over current protection and the earth fault protection and is considered to conform the relevant fire code requirement of the electrical use through the test of the fire testing center of the hunan province. The fire disaster electrical protector can efficiently prevent the electrical fire caused by the heat action generated by the overload and the short circuit of a distribution line and the earth fault.
Description
[technical field] the utility model relates to a kind of Electrical Safety protector, is that a kind of can preventing used electric fault and the electrical fire protector of initiation fire specifically.
[background technology] is along with China's electric power constantly popularizes, the continuous increase of power consumption equipment, to produce the electrical fire that electrical fire that heat effect causes and ground connection electric fault cause more and more owing to distribution line and power consumption equipment overvoltage, overload or short circuit, annually all will cause the economic loss of billions of units to country.At present, the product that China is used for overvoltage, overcurrent or short-circuit protection has only the overcurrent protection circuit breaker, as air switch, because it is to utilize metal heating and open circuit mechanically fully, therefore its protection speed is slow, the protection precision is low, and the electrical fire effect that causes preventing electric fault is little; The product that is used for ground connection electric fault protection has only RCD, because it can not be moistureproof and misoperation often takes place, uses very inconvenient.
[summary of the invention] is slow in order to overcome existing overcurrent protective device and RCD protection speed; the defective of the low and easy misoperation of protection precision; it is a kind of fast to electric fault protection speed that the utility model provides; protection precision height; and do not produce the electrical fire protector of misoperation, to avoid causing the tremendous economic loss that electrical fire causes because of electric fault.
The utility model is that the technical scheme that its technical problem of solution is adopted is: in insulation shell, be provided with zero sequence current mutual inductor and micro-transformer of current and be used for residual current sampling and main circuit current sampling, the housing middle part is provided with automatically controlled plate, be used to install sample circuit and control circuit, also be provided with decompression capacitor or transformer, be used for step-down, also be provided with high-power latching relay in addition, be used for disconnecting or closed main circuit, housing top is provided with the electric power incoming line terminal, and the bottom is provided with the power outlet terminal, and the front of housing is provided with upper cover plate and binding post cover plate, cover housing and turnover binding post respectively, upper cover plate is provided with hand switch and self check button.Its feature is: two pairs of normally closed contacts that are serially connected with the latching relay of control closure/disconnection in live wire in the main circuit and the zero line respectively, the live wire of main circuit and zero line pass zero sequence current mutual inductor simultaneously, live wire also passes the micro power instrument transformer separately, on zero sequence current mutual inductor and micro-transformer of current, be wound with multiturn coil respectively, be used to produce different induced voltages.Induced voltage drives latching relay and cuts off main circuit after being located at the control circuit on the control board.The power supply of control circuit by be connected in parallel on input zero line and output on the live wire by capacitor C
1, C
2With diode D
1～D
4The step-down of forming, rectification circuit power supply.Between zero line and the live wire there be by button AN and resistance R cross-over connection before and after zero sequence current mutual inductor
3The residual current checking circuit of forming.
The beneficial effects of the utility model are:
1. can effectively carry out the protection of overcurrent or short circuit:
As long as pass micro-transformer of current ZCT
2In main circuit live wire when having electric current to pass through, ZCT
2Just produce induced voltage, and be the relation that is directly proportional between them, when the electric current that flows through the main circuit live wire reaches set point, ZCT
2The induced voltage that produces is through diode D
6, capacitor C
6, resistance R
6, adjustable resistance W
2Make voltage-stabiliser tube DW
2The reverse breakdown conducting triggers controllable silicon MCR conducting, latching relay J
1Energising changes state, its two groups of contact J
1-1, J
1-2Change into off-state by closure state, disconnect output voltage, control circuit also loses power supply, J simultaneously
1Outage, but J
1-1, J
1-2Still keep off-state.Change adjustable resistance W
2Resistance or voltage stabilizing didoe DW
2The voltage stabilizing value, just can adjust the set point of the electric current that flows through the main circuit live wire, can prevent from effectively to produce the electrical fire that heat effect causes because of overcurrent or short circuit.
2. can effectively carry out the protection of earth current:
When the ground connection electric fault occurring, flow through and pass zero sequence current mutual inductor ZCT
1The electric current of two main circuit conductors will be uneven, ZCT
1Will produce induced voltage, and the electric current difference that two main circuit conductors flow through is big more, ZCT
1The induced voltage that produces is also just high more, when earth current reaches set point, and ZCT
1The induced voltage that produces is through diode D
5, resistance R
5, R
4And capacitor C
5Trigger controllable silicon MCR conducting, latching relay J
1Energising change state, J
1Two groups of contact J
1-1, J
1-2Change into off-state by closure state, disconnect out-put supply.Change resistance R
4, R
5Resistance, just can adjust the set point of earth current, can prevent the electrical fire that the ground connection electric fault causes effectively.
3. can effectively carry out superpotential protection:
Because capacitor C
2The voltage at two ends changes with main circuit voltage, when main circuit voltage rises to set point, and C
2The voltage at two ends also rises thereupon, through resistance R
1With adjustable resistance W
1Dividing potential drop makes voltage stabilizing didoe DW
1The reverse breakdown conducting triggers controllable silicon MCR conducting, latching relay J
1Energising change state, J
1Two groups of contact J
1-1, J
1-2Change into off-state by closure state, disconnect out-put supply.Change adjustable resistance W
1Resistance or voltage stabilizing didoe DW
1The voltage stabilizing value, just can adjust the set point of main circuit voltage, can effectively prevent to burn out the electrical fire that consuming device causes because of overtension.
4. self moisture-proof function is arranged preferably
With epoxide-resin glue the components and parts on the control board are carried out sealing together with control board, the misoperation that produces in the time of effectively preventing electric component to be made moist because of air humidity.
5. owing to adopt latching relay, when the electrical equipment in the circuit has because of overcurrent-overvoltage or earth fault, can trigger controllable silicon timely and latching relay is cut off the electricity supply, after cutting off the electricity supply, the contact of this relay still disconnects, have only fault to disappear after, pass through hand switch, just can restart power supply, therefore, the utility model reliable operation, safety.
[description of drawings] further specifies utility model below in conjunction with drawings and Examples.
Fig. 1 is a Facad structure schematic diagram of the present utility model.
Fig. 2 is the internal structure schematic diagram after the utility model removes cover plate.
Fig. 3 is an electrical schematic diagram of the present utility model.
Among the figure: 1 housing, 2 input terminal cover plates, 3 upper cover plates, 4 hand switch grooves, 5 hand switches, 6 self check button AN, 7 outlet terminal cover plates, 8 bases, 9 electric capacity, 10 input terminals, fixing hole on 11,12 micro-transformer of current, 13 through wires holes, 14 zero sequence current mutual inductors, 15 automatically controlled plates, 16 latching relays, 17 outlet terminals, 18 lower fixed holes.
[embodiment] is provided with upper cover plate 3 in the front of insulation shell 1, turnover line terminals cover plate 2 and 7, upper cover plate 3 is provided with hand switch groove 4, hand switch 5 and self check button 6, hand switch 5 passes switch groove 4 and entangles the contact moving plate that is located at the latching relay 16 in the housing 1, stir hand switch 5, can make the two groups of closings of contact or the disconnection of latching relay 16, in the base 8 of housing 1 inside, be provided with electric capacity 9, micro-transformer of current 12, zero sequence current mutual inductor 14, automatically controlled plate 15 and latching relay 16, base top is provided with 2 input terminals 10, and the base bottom is provided with outlet terminal 17, is provided with fixing hole 11 in the middle of 2 input terminals, in the middle of 2 outlet terminals, be provided with lower fixed hole 18, on base 8, be provided with 4 with pass in and out the corresponding through wires hole 13 of line terminals.On automatically controlled plate 15, be provided with by diode D
1～D
4And capacitor C
2The current rectifying and wave filtering circuit of forming is by resistance R
1, adjustable resistance W
1, capacitor C
3With voltage stabilizing didoe DW
1The voltage sampling of forming is adjusted circuit, by diode D
5, resistance R
4, R
5And capacitor C
5Circuit is adjusted in the zero-sequence current sampling of forming, by diode D
6, capacitor C
6, resistance R
6, adjustable resistance W
2With zener diode DW
2Circuit is adjusted in the overcurrent of forming, short circuit current sampling, by resistance R
2, capacitor C
4Control circuit with controllable silicon MCR composition.One group of contact of lock-up relay 16 is serially connected in the middle of the live wire of main circuit, another group contact is serially connected in the middle of the zero line of main circuit, a live wire of main circuit passes micro-transformer of current, a live wire and a zero line of main circuit pass zero sequence current mutual inductance simultaneously, and two instrument transformer tops are wound with multiturn coil respectively.Collapse between output live wire before and after zero sequence current mutual inductor and the zero line and be connected to by button AN and resistance R
3The self-checking circuit of forming.
Claims (6)
1, a kind of electrical fire protector, mainly form by housing, cover plate, inlet wire binding post, outlet binding post, zero sequence current mutual inductor, the mutual device of miniature electric current, automatically controlled plate and latching relay, it is characterized in that: two pairs of normally closed contacts that are serially connected with the latching relay of control closure/disconnection in live wire in main circuit and the zero line respectively, the live wire of main circuit and zero line pass zero sequence current mutual inductor simultaneously, and the live wire of main circuit also passes micro-transformer of current separately; On automatically controlled plate, be provided with power supply circuits and sample circuit; Between zero line and the live wire there be by button AN and resistance R cross-over connection before and after the zero sequence current mutual inductor of main circuit
3The residual current testing circuit of forming.
2, protector according to claim 1 is characterized in that: described power supply circuits are by decompression capacitor C
1, rectifier diode D
1～D
4, filter capacitor C
2Form; Be wound with multiturn coil on described zero sequence current mutual inductor and the micro-transformer of current respectively.
3, protector according to claim 1 is characterized in that: at the output of micro-transformer of current induction coil and be connected to by diode D
6, capacitor C
6, resistance R
6, adjustable resistance W
2With voltage stabilizing didoe DW
2Circuit, voltage stabilizing didoe DW are adjusted in the overcurrent of forming/short-circuit signal sampling
2The controllable silicon MCR control of output and latching relay control switch extremely link to each other, with the state of control latching relay.
4, protector according to claim 1 is characterized in that: at the output of zero sequence current mutual inductor induction coil and be connected to by diode D
5, resistance R
5, R
4With capacitor C
5The earth current protection sample circuit of forming, capacitor C
5Two ends be attempted by between the control utmost point and emitter of latching relay control switch controllable silicon MCR, with control latching relay state.
5, protector according to claim 1 is characterized in that: at the filter capacitor C of power supply circuits
2Output be connected with by resistance R
1, adjustable resistance W
1, voltage stabilizing didoe WD
1Circuit is adjusted in the overvoltage sample of signal of forming, and controls with the controllable silicon MCR of latching relay control switch at the output of voltage stabilizing didoe extremely to link to each other, with the state of control latching relay.
6, protector according to claim 1 is characterized in that: the electric component on the described control board is an one by epoxide-resin glue and control board sealing all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052262 CN2831567Y (en) | 2005-10-25 | 2005-10-25 | Fire disaster electrical protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520052262 CN2831567Y (en) | 2005-10-25 | 2005-10-25 | Fire disaster electrical protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2831567Y true CN2831567Y (en) | 2006-10-25 |
Family
ID=37136486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520052262 Expired - Fee Related CN2831567Y (en) | 2005-10-25 | 2005-10-25 | Fire disaster electrical protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2831567Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064515A (en) * | 2009-11-16 | 2011-05-18 | 淳俅 | Domestic intelligent electrical safe power distribution system |
| CN102074926A (en) * | 2011-01-05 | 2011-05-25 | 浙江富隆电气有限公司 | Single fire monitor |
| CN110364836A (en) * | 2019-06-25 | 2019-10-22 | 泉州洛江吉如机械设计有限公司 | A kind of electrical fire security device |
| CN112837492A (en) * | 2021-03-01 | 2021-05-25 | 合肥依科普工业设备有限公司 | Electric arc fire alarm instrument |
-
2005
- 2005-10-25 CN CN 200520052262 patent/CN2831567Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064515A (en) * | 2009-11-16 | 2011-05-18 | 淳俅 | Domestic intelligent electrical safe power distribution system |
| CN102074926A (en) * | 2011-01-05 | 2011-05-25 | 浙江富隆电气有限公司 | Single fire monitor |
| CN110364836A (en) * | 2019-06-25 | 2019-10-22 | 泉州洛江吉如机械设计有限公司 | A kind of electrical fire security device |
| CN112837492A (en) * | 2021-03-01 | 2021-05-25 | 合肥依科普工业设备有限公司 | Electric arc fire alarm instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |