CN103872658A - Multifunctional self-recovery over-voltage and under-voltage protector - Google Patents
Multifunctional self-recovery over-voltage and under-voltage protector Download PDFInfo
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- CN103872658A CN103872658A CN201410132422.4A CN201410132422A CN103872658A CN 103872658 A CN103872658 A CN 103872658A CN 201410132422 A CN201410132422 A CN 201410132422A CN 103872658 A CN103872658 A CN 103872658A
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Abstract
Provided is a multifunctional self-recovery over-voltage and under-voltage protector. A main circuit is divided into a power supply end of the main circuit and a load end of the main circuit due to the fact that a normally-open contact of a self-hold relay is in serial connection with the middle portion of the main circuit, the on-off state of the self-hold relay is completely controlled through a main control circuit, and the sampling end of an over-voltage protection circuit and the sampling end of an under-voltage protection circuit are connected with the output end of a transformation and rectification filter circuit of a power supply of the main circuit; the sampling end of an over-current protection circuit, the sampling end of a short-circuit protection circuit and the sampling end of an earth leakage protection circuit are connected with the load end of the main circuit, and the output ends of the four protection circuits are connected with the main control circuit; the two ends of a self-checking circuit are connected with the load end and the power supply end of the main circuit in a crossing mode. The multifunctional self-recovery over-voltage and under-voltage protector is high in integration degree, comprehensive in protection function, easy to install, convenient to use and high in cost performance, and saves energy and electricity.
Description
Technical field
The present invention relates to a kind of electrical equipment of electric terminal user power distribution protection, be specifically related to that a kind of Multifunction self-resetting formula is crossed, under-voltage protector.
Background technology
Existing electric terminal user's distribution box is all that short circuit and the leak current fault to total loop protected by an air switch or earth leakage protective device, use again a self-resetting type mistake, the overvoltage of under-voltage protector to total loop, under voltage fault is protected, such two products use simultaneously, not only cost is higher, volume is larger, also the expense material of taking a lot of work is installed, and air switch or earth leakage protective device very low to the protection precision of over current fault, be easy to occur electrical safety accident, self-resetting type mistake, under-voltage protector is the break-make with common high power relay control main circuit, and common high power relay will maintain conducting by electric energy, long-time energising is unfavorable for energy-conservation.
Summary of the invention
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists; and provide, a kind of Multifunction self-resetting formula with self-resetting type overvoltage protection, self-resetting type under voltage protection, short interruption protection, overcurrent open circuit protection and leakage, breaking protection is crossed, under-voltage protector; integrated degree is high; defencive function is comprehensive; install simple; easy to use, energy saving, cost performance is high.
The technical scheme that the present invention takes is:
A kind of Multifunction self-resetting formula is crossed, under-voltage protector, main circuit is serially connected in centre and is divided into the power end of main circuit and the load end of main circuit by the normally opened contact of latching relay, and the switching of latching relay is subject to the control of total control circuit completely, the input of transformation current rectifying and wave filtering circuit is connected to the power end of main circuit, and excess voltage protection and under voltage protection circuit sampling end are all connected to the output of transformation current rectifying and wave filtering circuit; The sampling end of overcurrent, short-circuit protection circuit and leakage protection circuit is all connected to main circuit load end, and the output of above-mentioned excess voltage protection, under voltage protection circuit, overcurrent, short-circuit protection circuit and leakage protection circuit is all connected to total control circuit; Self-checking circuit one end is connected to main circuit load end through on the live wire of zero sequence current mutual inductor, and the self-checking circuit other end is connected on the zero line of main circuit power end.
In technique scheme; described excess voltage protection is made up of bleeder circuit, voltage comparator circuit and overvoltage failure indicating circuit; the input of bleeder circuit is connected to transformation rectification filter circuit output end; the output of bleeder circuit is connected to two 4 input AND gate circuit the 2nd input pins of total control circuit; the break-make of two 4 input AND gate circuit control the first relays; and the break-make of the second relay is controlled in the contact of the first relay; the second relay is latching relay, the break-make of its normally opened contact control main circuit.
In technique scheme; described under voltage protection circuit is made up of bleeder circuit, voltage comparator circuit and under voltage failure indicating circuit; bleeder circuit one end is connected to transformation rectification filter circuit output end; carry out under voltage sampling, the bleeder circuit other end is connected on two 4 input AND gate circuit the 5th input pins of total control circuit.
In technique scheme; described overcurrent, short-circuit protection circuit are connected and composed by current transformer, the second controllable silicon and diode, capacitance-resistance filter regulating circuit; current transformer is arranged on main circuit load end live wire; the secondary output of current transformer is connected to the second SCR control utmost point after diode, capacitance-resistance filter regulating circuit, and the second controllable silicon anode is connected to two 4 input AND gate circuit the 4th input pins of total control circuit.
In technique scheme; described leakage protection circuit is connected and composed by zero sequence current mutual inductor, the first controllable silicon and diode, capacitance-resistance filter regulating circuit; the live wire of main circuit load end and zero line are simultaneously through zero sequence current mutual inductor; the secondary output of zero sequence current mutual inductor is connected to the first SCR control utmost point after diode, capacitance-resistance filter regulating circuit, and the first controllable silicon anode is connected to two 4 input AND gate circuit the 3rd input pins of total control circuit.
Total control circuit is by two 4 input AND gate circuit and bleeder circuits, delay circuit, the 3rd triode, the first relay, the second relay connects and composes, 4 inputs of two 4 input AND gate circuits are connected to respectively excess voltage protection, under voltage protection circuit, overcurrent, the output of short-circuit protection circuit and leakage protection circuit, the output of two 4 input AND gate circuits is through bleeder circuit, delay circuit is connected to the base stage of the 3rd triode, after the 3rd triode and the series connection of the first relay, two ends are connected between the anode and negative terminal of transformation rectification filtering voltage stabilizing circuit output power supply, and the line bag power channel of the second relay is directly controlled in second group of contact of the first relay.
The present invention has successfully realized air switch first in electric terminal user's power distribution protection equipment, earth leakage protective device and self-resetting type mistake, the Multifunctional height of under-voltage protector merges integrated unification, make a product there is overcurrent protection simultaneously, short-circuit protection, earth leakage protective, self-resetting type overvoltage, the multi-protective function such as under voltage protection and faulty indication, and the precision of overcurrent protection is very high, maintaining main circuit is switched on or switched off state and does not need to consume electric energy, therefore the present invention has compared to prior art compared with much progress, and energy-saving safe, integrated level is high, install simple, easy to use, multiple functional, cost performance is high, be worthy of popularization.
Accompanying drawing explanation
Fig. 1 is electrical principle block diagram of the present invention;
Fig. 2 is housing cover installation diagram of the present invention;
Fig. 3 is housing base installation diagram of the present invention;
Fig. 4 is the invention process circuit diagram.
In figure, the model of integrated circuit used is: IC
1: 78L12, IC
2: LM393, IC
3: CD4082.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Referring to Fig. 1, main circuit latching relay normally opened contact is serially connected in middle, and main circuit is divided into power end and the main circuit load end of main circuit, and the break-make of latching relay is subject to the control of total control circuit, and transformation current rectifying and wave filtering circuit is connected to main circuit power end.The sampling end of excess voltage protection and under voltage protection circuit is all connected to the output of transformation current rectifying and wave filtering circuit; the sampling end of overcurrent, short-circuit protection circuit and leakage protection circuit is all connected to main circuit load end; the output of above-mentioned four protective circuits all connects total control circuit; self-checking circuit one end is connected on main circuit load end through on the live wire of zero sequence current mutual inductor, and the self-checking circuit other end is connected on the zero line on main circuit power end.
Referring to Fig. 2, Fig. 3, the present invention is a kind of Multifunction self-resetting formula over voltage protector that integrates the several functions such as overcurrent, short-circuit protection, earth leakage protective and the protection of self-resetting type over-and under-voltage and energy saving.It is mainly made up of the mains switch on housing, housing, self check button, indicator light, current transformer, zero sequence current mutual inductor, high-power latching relay, transformer, electric-controlled plate, main circuit line binding post.Its feature is: housing cover 1 is provided with and in the wire hold-down screw 7, housing base 8 of the wire hold-down screw 2 of mains switch 6, self check button 5, power supply indicator 3, four malfunction indicator lamp 4, two main circuit input terminals, two main circuit outlet terminals, is provided with two main circuit input terminals 9, two main circuit outlet terminals 15, high-power latching relay 10, transformer 12, zero sequence current mutual inductor 14, current transformer 13 and electric-controlled plates 11, two groups of contact J of high-power latching relay 10
2-1and J
2-2be serially connected in respectively in the middle of the live wire centre and zero line of main circuit.Control board is provided with overcurrent, short-circuit protection circuit, leakage protection circuit, self-resetting type over voltage protective circuit.
Referring to Fig. 4, the electric circuit constitute of the present embodiment is: excess voltage protection is by resistance R
3, R
5, R
7, R
8, R
9, R
10, adjustable resistance W
2, diode D
6, light-emitting diode FD
2, triode V
1and voltage comparator ic
2aform, under voltage protection circuit is by resistance R
2, R
4, R
6, R
11, R
12, R
13, adjustable resistance W
1diode D
7, light-emitting diode FD
3, triode V
2and voltage comparator ic
2bform, the sampling end of excess voltage protection and under voltage protection circuit is all connected to the output of transformation current rectifying and wave filtering circuit.Overcurrent, short-circuit protection circuit are by current transformer ZCT
2, resistance R
15, R
16, R
20, R
21, adjustable resistance W
4, capacitor C
7, C
8, diode D
10, D
11, light-emitting diode FD
5with controllable silicon T
2form, the live wire of main circuit load end is through current transformer ZCT
1, current transformer ZCT
1secondary ZCT
1-1be connected across the input of overcurrent, short-circuit protection circuit.Leakage protection circuit is by zero sequence current mutual inductor ZCT
2, resistance R
14, R
15, capacitor C
5, C
6, adjustable resistance W
3, diode D
8, D
9, light-emitting diode FD
4with controllable silicon T
1form, the live wire of main circuit load end and zero line are simultaneously through zero sequence current mutual inductor ZCT
2, zero sequence current mutual inductor ZCT
2the secondary input that is connected across leakage protection circuit.Total control circuit is by two 4 input AND gate circuit IC
3, resistance R
17, R
18, R
19, capacitor C
3, C
4, C
9, diode D
5, triode V
3, the first relay J
1with the second relay J
2high-power latching relay forms, the second relay J
2two groups of contact J
2-1, J
2-2be serially connected in respectively in the middle of the live wire centre and zero line of main circuit.Power transformer B's is elementary through mains switch K
1after be connected across in the middle of the live wire and zero line of main circuit power end, the secondary current rectifying and wave filtering circuit that is connected to, power supply indicator FD
1through current-limiting resistance R
1after be connected across the output of transformation current rectifying and wave filtering circuit, output one tunnel of current rectifying and wave filtering circuit is connected to the sampling end of voltage protection circuit and under-voltage protecting circuit, a road is through three-terminal voltage-stabilizing IC circuit
1working power is provided to afterwards excess voltage protection, under voltage protection circuit, overcurrent, short-circuit protection circuit, leakage protection circuit, total control circuit, a road is through diode D
5give the second relay J
2working power is provided.
When power turn-on K switch
1after, the transformer B work of switching on, the low-voltage AC path diode D of B level output
1-D
4rectification, capacitor C
1after filtering, be the invention provides DC supply, at main circuit power end without overvoltage, under voltage fault in the situation that, voltage comparator ic
2athe 3rd pin voltage is higher than the 2nd pin voltage, and the 1st pin is exported high level, IC
2bthe 5th pin voltage is higher than the 6th pin voltage, and the 7th pin is output as high level, two 4 input AND gate circuit IC
3input the 2nd, the 5th pin is all high level, and the 3rd pin is because of controllable silicon T
1conducting is not high level, and the 4th pin is also because of controllable silicon T
2conducting is not high level, therefore IC
3output the 1st pin is high level, triode V
3conducting after time delay, relay J
1energising adhesive, J
1two groups of contact J
1-1 and J
1-2conversion, J
1-1normally opened contact closure, delay capacitor C
4through resistance R
19repid discharge, for three take over V next time
3delayed conducting prepare, J
1-2normally opened contact closure, electric current is through D
5→ J
1-2normally opened contact → J
2→ C
9→ ground, makes the 3rd relay J
2add positive pulse and transition status, J
2two groups of contact J
2-1and J
2-2be converted to closure state by off-state, at J
2before not adding negative pulse, keep this closure state always; the load end of main circuit and power end are connected; and the overvoltage fault and the under voltage fault that start the main circuit power to bring out line carry out self-resetting type protection, overcurrent, short trouble, leak current fault that main circuit load end is occurred carry out open circuit protection.
Concrete circuit working principle is as follows:
Overvoltage self-resetting type protection: when power turn-on K switch 1, as main circuit power end (triode V before connecting load end
3the effect of Delayed conducting) just there is overtension fault, the present invention will refuse to load end power transmission, after main circuit power end and load end connection operation, there is overtension fault, the present invention will cut off load end power supply immediately, to guarantee that main circuit load end power consumption equipment is not because overtension burns out, thereby avoid the electrical safety accident and the electrical fire accident that cause because of overtension, after main circuit power terminal voltage is recovered normally, the present invention will automatically connect the load end of main circuit and power end in 5S, to guarantee normal electricity consumption, its operation principle is: in the time that main circuit power voltage raises, transformer B secondary voltage also increases, through D
1-D
4, C
1voltage after rectifying and wave-filtering also and then raises, voltage comparator ic
2athe 2nd pin voltage equally and then raises, and works as IC
2athe 2nd pin voltage is during higher than the 3rd pin voltage, IC
2athe 1st pin output becomes low level from high level, and first triode becomes cut-off, overvoltage malfunction indicator lamp FD from conducting
2energising brightens, simultaneously two 4 input AND gate circuit IC
3because the 2nd input pin becomes low level by high level, the 1st output pin also becomes low level by high level, as the 3rd triode V
3power turn-on K switch
1time, also access failure of main circuit load end and power end, makes V
3continue to remain on cut-off state, as the 3rd triode V
3in conducting state (main circuit load end and power end have been connected operation), make V3 become cut-off state from conducting state immediately, the first relay J before this
1power-off discharges, J
1two groups of contact J
1-1and J
1-2conversion, J
1-1normally-closed contact closure, by capacitor C
4access the 3rd triode V
3base stage, be V next time
3delayed conducting is got ready, J
1-2normally-closed contact closure, electric C
9give the second relay J
2electric discharge, J
2because of negative pulse effect transition status, J
2two groups of contact J
2-1and J
2-2be converted to off-state by closure state, the present invention cuts off main circuit load end and power end immediately, changes adjustable resistance W
2resistance, just can adjust the set point of main circuit overvoltage action, when main circuit voltage drop recover normal after, the output valve of transformation current rectifying and wave filtering circuit also declines thereupon and recovers normal, works as IC
2athe 2nd pin voltage lower than the 3rd pin voltage after, the 1st output pin becomes high level from low level, two 4 input AND gate circuit IC
3input the 2nd pin becomes high level from low level simultaneously, and the 3rd, the 4th, the 5th input pin is also high level originally, IC
3the 1st output pin is high level by low transition, the 3rd triode V
3because of capacitor C
4charge and Delayed conducting, the first relay J
1energising adhesive, J
1two groups of contact J
1-1and J
1-2conversion, J
1-1normally opened contact closure, make capacitor C
4through resistance R
19electric discharge, J
1-2normally opened contact closure, make the second relay J
2add positive pulse and transition status, J
2two groups of normally opened contact J
2-1and J
2-2be converted to closure state by off-state, the load end of main circuit and power end are connected.
Under voltage self-resetting type protection: cell switch K closes
1time, as just there is under voltage fault in main circuit power end before connecting load end, the present invention will refuse to load end power transmission, as outlet under voltage fault after main circuit power end and load end connection operation, the present invention will cut off load end power supply immediately, to guarantee that load end power consumption equipment is because brownout damages, after main circuit voltage recovers normally, the present invention will automatically connect main circuit load end and power end in 5S, to guarantee normal electricity consumption.Its operation principle is: in the time that main circuit power terminal voltage reduces, transformer secondary output also decreases, through diode D
1-D
4, capacitor C
1voltage after rectifying and wave-filtering also and then reduces, voltage comparator ic
2bthe 5th pin voltage equally and then reduces, and works as IC
2bthe 5th pin voltage is during lower than the 6th pin voltage, IC
2bthe 7th pin output becomes low level from high level, the 2nd triode V
2become cut-off from conducting, under voltage malfunction indicator lamp FD
3energising brightens, simultaneously two 4 input AND gate circuit IC
3input the 5th pin is transformed to low level by high level, and the 1st output pin also becomes low level from high level, as the 3rd triode V
3also not conducting, makes V at this moment
3continue to remain on cut-off state, as V
3in conducting state, make V before this
3become cut-off state from conducting state, the first relay J
1power-off discharges, the second relay J
2because of negative pulse effect transition status, J
2two groups of contact J
2-1and J
2-2be converted to off-state by closure state, the present invention cuts off main circuit load end and power end immediately, changes adjustable resistance W
1resistance just can adjust the set point of main circuit under voltage action, when main circuit voltage rise return to normal after, IC
2bhigh the 6th pin voltage of the 5th pin voltage, IC
2bthe 7th pin output becomes high level from low level, IC
32nd, 3,4 pin are also high level originally, IC
3the 1st output pin becomes high level from low level, V
3delayed conducting, J
1energising adhesive, J
2because adding positive pulse transition status, J
2two groups of contact J
2-1and J
2-2be converted to closure state by off-state, main circuit load end and power end are connected.
Overcurrent, short-circuit protection: after the operation of main circuit load end normal power-up; as load end generation overcurrent, short trouble; the present invention cuts off load end and power end immediately, to guarantee that the use electric line of load end and power consumption equipment are because overcurrent, short trouble burn out, preventing electric fire.Its operation principle is: in the time there is overcurrent or short trouble in load end, and the current transformer ZCT on main circuit load end live wire
1the induced current producing also will correspondingly increase, and this electric current is through diode D
10, D
11, resistance R
16, R
20, R
21, adjustable resistance W4, capacitor C
7, C
8, trigger controllable silicon T
2conducting, T
2anode become low level by high level, overcurrent, short trouble indicator light FD
5energising brightens, simultaneously two 4 input AND gate circuit IC
3input the 4th pin also becomes low level from high level, and output the 1st pin becomes low level from high level, and three take over V
3become cut-off from conducting, relay J
1power-off discharges, J
2because of negative pulse effect transition status, J
2two groups of contact J
2-1and J
2-2be converted to off-state by closure state, the present invention cuts off main circuit load end and power end immediately, changes adjustable resistance W
4resistance just can adjust the set point of main circuit load end overcurrent action.
Earth leakage protective: after the operation of main circuit load end normal power-up, as leak current fault appears suddenly in load end, the present invention will cut off main circuit load end power supply immediately, to ensure personal safety, prevention electrical grounding fire.Its operation principle is: in the time of main circuit load end generation leak current fault, flow through through zero sequence circuit instrument transformer ZCT
2the electric current of two main circuit conductors will be uneven, ZCT
2secondaryly will produce induced current, and the electric current difference that two main circuit conductors flow through is larger, ZCT
2the induced current producing is just larger, in the time that leakage current reaches the operating value of setting, and ZCT
2the induced current of secondary generation is through diode D
8, D
9, resistance R
14, R
15, adjustable resistance W
3, capacitor C
5, C
6trigger controllable silicon T
1conducting, T
1anode become low level from high level, leak current fault indicator light FD
4energising brightens, simultaneously two 4 input AND gate circuit IC
3input the 3rd pin becomes low level by high level, and output the 1st pin also becomes low level from high level, triode V
3become cut-off from conducting, relay J
1power-off discharges, J
2because of negative pulse effect transition status, J
2two groups of contact J
2-1and J
2-2be converted to off-state by closure state, the present invention cuts off main circuit load end and power end immediately, changes adjustable resistance W
3resistance just can adjust the set point of main circuit load end leakage current action.
Claims (6)
- A Multifunction self-resetting formula cross, under-voltage protector, it is characterized in that, main circuit is serially connected in centre and is divided into the power end of main circuit and the load end of main circuit by the normally opened contact of latching relay, and the switching of latching relay is subject to the control of total control circuit completely, the input of transformation current rectifying and wave filtering circuit is connected to the power end of main circuit, and excess voltage protection and under voltage protection circuit sampling end are all connected to the output of transformation current rectifying and wave filtering circuit; The sampling end of overcurrent, short-circuit protection circuit and leakage protection circuit is all connected to main circuit load end, and the output of above-mentioned excess voltage protection, under voltage protection circuit, overcurrent, short-circuit protection circuit and leakage protection circuit is all connected to total control circuit; Self-checking circuit one end is connected to main circuit load end through on the live wire of zero sequence current mutual inductor, and the self-checking circuit other end is connected on the zero line of main circuit power end.
- 2. Multifunction self-resetting formula mistake according to claim 1, under-voltage protector, it is characterized in that, described excess voltage protection is by bleeder circuit, voltage comparator circuit and overvoltage failure indicating circuit form, the input of bleeder circuit is connected to transformation rectification filter circuit output end, the output of bleeder circuit is connected to two 4 input AND gate circuit the 2nd input pins of total control circuit, the break-make of two 4 input AND gate circuit control the first relays, and the break-make of the second relay is controlled in the contact of the first relay, the second relay is latching relay, the break-make of its normally opened contact control main circuit.
- Multifunction self-resetting formula according to claim 1 cross, under-voltage protector; it is characterized in that; described under voltage protection circuit is made up of bleeder circuit, voltage comparator circuit and under voltage failure indicating circuit; bleeder circuit one end is connected to transformation rectification filter circuit output end; carry out under voltage sampling, the bleeder circuit other end is connected on two 4 input AND gate circuit the 5th input pins of total control circuit.
- Multifunction self-resetting formula according to claim 1 cross, under-voltage protector; it is characterized in that; described overcurrent, short-circuit protection circuit are connected and composed by current transformer, the second controllable silicon and diode, capacitance-resistance filter regulating circuit; current transformer is arranged on main circuit load end live wire; the secondary output of current transformer is connected to the second SCR control utmost point after diode, capacitance-resistance filter regulating circuit, and the second controllable silicon anode is connected to two 4 input AND gate circuit the 4th input pins of total control circuit.
- Multifunction self-resetting formula according to claim 1 cross, under-voltage protector; it is characterized in that; described leakage protection circuit is connected and composed by zero sequence current mutual inductor, the first controllable silicon and diode, capacitance-resistance filter regulating circuit; the live wire of main circuit load end and zero line are simultaneously through zero sequence current mutual inductor; the secondary output of zero sequence current mutual inductor is connected to the first SCR control utmost point after diode, capacitance-resistance filter regulating circuit, and the first controllable silicon anode is connected to two 4 input AND gate circuit the 3rd input pins of total control circuit.
- 6. Multifunction self-resetting formula mistake according to claim 1, under-voltage protector, it is characterized in that, total control circuit is by two 4 input AND gate circuit and bleeder circuits, delay circuit, the 3rd triode, the first relay, the second relay connects and composes, 4 inputs of two 4 input AND gate circuits are connected to respectively excess voltage protection, under voltage protection circuit, overcurrent, the output of short-circuit protection circuit and leakage protection circuit, the output of two 4 input AND gate circuits is through bleeder circuit, delay circuit is connected to the base stage of the 3rd triode, after the 3rd triode and the series connection of the first relay, two ends are connected between the anode and negative terminal of transformation rectification filtering voltage stabilizing circuit output power supply, and the line bag power channel of the second relay is directly controlled in second group of contact of the first relay.
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|---|---|---|---|
| CN201410132422.4A CN103872658B (en) | 2014-04-03 | 2014-04-03 | Multifunction self-resetting formula is crossed, under-voltage protector |
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|---|---|---|---|
| CN201410132422.4A CN103872658B (en) | 2014-04-03 | 2014-04-03 | Multifunction self-resetting formula is crossed, under-voltage protector |
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| CN103872658B CN103872658B (en) | 2016-08-31 |
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| CN105048406A (en) * | 2015-08-20 | 2015-11-11 | 浙江凯发电气股份有限公司 | Self-recovery overvoltage and undervoltage protector circuit |
| CN105186445A (en) * | 2015-08-20 | 2015-12-23 | 浙江凯发电气股份有限公司 | Novel self-recovery type overvoltage-undervoltage protector circuit |
| CN105958337A (en) * | 2016-04-28 | 2016-09-21 | 湖南星球智能电气科技开发有限公司 | Multi-functional distribution box |
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| CN101420116B (en) * | 2008-12-04 | 2010-08-25 | 临安亿安电子有限公司 | Intelligent integrated electricity leakage protection device |
| CN201402965Y (en) * | 2009-04-28 | 2010-02-10 | 苏州工业园区新宏博通讯科技有限公司 | Single-phase intelligent electricity utilization protecting device |
| CN102064515A (en) * | 2009-11-16 | 2011-05-18 | 淳俅 | Domestic intelligent electrical safe power distribution system |
| CN102110971A (en) * | 2009-12-23 | 2011-06-29 | 张斌 | Intelligent protection controller for low-voltage distribution room |
| CN203850824U (en) * | 2014-04-03 | 2014-09-24 | 湖南星球智能电气科技开发有限公司 | Multifunctional self-recovery over-voltage and under-voltage protector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048406A (en) * | 2015-08-20 | 2015-11-11 | 浙江凯发电气股份有限公司 | Self-recovery overvoltage and undervoltage protector circuit |
| CN105186445A (en) * | 2015-08-20 | 2015-12-23 | 浙江凯发电气股份有限公司 | Novel self-recovery type overvoltage-undervoltage protector circuit |
| CN105958337A (en) * | 2016-04-28 | 2016-09-21 | 湖南星球智能电气科技开发有限公司 | Multi-functional distribution box |
| CN105978148A (en) * | 2016-06-15 | 2016-09-28 | 湖南星球智能电气科技开发有限公司 | Domestic intelligent power distribution safety system with remote monitoring function, and remote monitoring method therefor |
| CN105978148B (en) * | 2016-06-15 | 2019-03-22 | 湖南省奥能星科技有限公司 | The domestic intelligent safe distribution of electric power system and its long-distance monitoring method that can remotely monitor |
| CN106602533A (en) * | 2016-12-14 | 2017-04-26 | 安徽长龙电气集团有限公司 | Overvoltage protection circuit used for power distribution cabinet |
| CN111758035A (en) * | 2018-02-27 | 2020-10-09 | 德恩塞两合公司 | Method for evaluating the state and quality of a low-voltage network |
| CN111758035B (en) * | 2018-02-27 | 2023-06-30 | 德恩塞欧洲股份公司 | Method for evaluating the state and quality of a low-voltage network |
| CN109445319A (en) * | 2018-09-26 | 2019-03-08 | 电子科技大学 | A kind of intelligent switch with Data Detection function |
| CN109217255A (en) * | 2018-11-13 | 2019-01-15 | 柳州辰天科技有限责任公司 | The method and its relay power control module of goat phase failure protector relay power supply |
| CN109217255B (en) * | 2018-11-13 | 2023-09-01 | 柳州辰天科技有限责任公司 | Relay power supply method of phase failure protector of switch machine and relay power supply control module thereof |
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| CN103872658B (en) | 2016-08-31 |
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