CN203205826U - Low voltage and high voltage leakage protection circuits - Google Patents
Low voltage and high voltage leakage protection circuits Download PDFInfo
- Publication number
- CN203205826U CN203205826U CN 201320212245 CN201320212245U CN203205826U CN 203205826 U CN203205826 U CN 203205826U CN 201320212245 CN201320212245 CN 201320212245 CN 201320212245 U CN201320212245 U CN 201320212245U CN 203205826 U CN203205826 U CN 203205826U
- Authority
- CN
- China
- Prior art keywords
- adjustable resistance
- button switch
- auxiliary relay
- indicator light
- normally opened
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to the electrical equipment technology field and especially relates to low voltage and high voltage leakage protection circuits. The low voltage leakage protection circuit comprises an alternating current contactor, an intermediate relay, adjustable resistors, a control transformer, a starting button switch and a stop button switch. A main contact of the alternating current contactor is arranged on a three phase transmission line of a load side. Each phase of the three phase transmission line between the main contact and the load is connected with the adjustable resistor. The intermediate relay is connected in parallel with an adjustable resistor string. The starting button switch is connected in series with an absorbing coil of the alternating current contactor and the stop button switch and then is connected in parallel with a secondary winding side of the control transformer. A normally open contact of the intermediate relay and a self holding contact of the alternating current contactor are successively connected in series and then are connected in parallel to two sides of the starting button switch. In the high voltage leakage protection circuit, a capacitor is arranged between a phase line and the adjustable resistors. By using the low voltage and high voltage leakage protection circuits provided in the utility model, when electric leakage is generated, a whole load side is in an outage state so that a protective effect is achieved.
Description
Technical field
The utility model relates to the electric equipment technical field, in particular to a kind of low pressure and high--voltage leakage protective circuit.
Background technology
Earth leakage protective device, the full name residual current operated protective device is earth leakage circuit-breaker again, mainly is when equipment generation leak current fault, the person that fatal risk is arranged is got an electric shock protect.
Wherein, current mode leakage protector is widely used a kind of in the earth leakage protective device.Its part with zero-sequence current in the circuit (being commonly referred to aftercurrent) as intermediary agency, is made outage reaction to leaky with electronic component as actuating signal.
The detecting element of current mode leakage protector is a zero sequence current mutual inductor; protected phase line, the neutral line pass ring-shaped core; constituted the primary winding of instrument transformer; be wrapped in winding on the annular core and constituted the secondary coil of instrument transformer; if electric leakage does not take place; at this moment flow through the current vector of phase line, the neutral line and equal zero, therefore on secondary coil, can not produce corresponding induced electromotive force.If electric leakage has taken place; the current vector of phase line, the neutral line and be not equal to zero; just make and produce induced electromotive force on the secondary coil; this signal will be sent to intermediate link and be further processed; when this current value reaches the operating current value of this earth leakage protective device restriction; actuator receives the command signal of intermediate link, implements action, automatically the power supply at disengagement failure place.
Therefore; the detecting element of the current mode leakage protector in the correlation technique; whether the electric current sum that is phase line by the detection of grid side and the neutral line is zero to judge whether to leak electricity; and phase line and the neutral line are the power transmission lines of grid side; be that current mode leakage protector is to be installed on grid side; only can carry out earth leakage protective to primary side, can not whether electric leakage take place to load end and detect and protect.
The utility model content
The purpose of this utility model is to provide a kind of low pressure and high--voltage leakage protective circuit, to solve the above problems.
A kind of low-voltage leakage protection circuit is provided in embodiment of the present utility model, has comprised A.C. contactor, first auxiliary relay, second auxiliary relay, the 3rd auxiliary relay, first adjustable resistance, second adjustable resistance, the 3rd adjustable resistance, control transformer, start button switch, stop button switch;
The main contacts of described A.C. contactor is arranged on the three phase transmission line of load-side;
Each of three phase transmission line between described main contacts and the load goes up mutually and all is connected an adjustable resistance, be respectively described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance, the equal ground connection of the other end of described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance;
Described first auxiliary relay, described second auxiliary relay and described the 3rd auxiliary relay respectively with described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance connection in series-parallel;
The absorbing coil of described start button switch and described A.C. contactor and described stop button switch are connected in series the back and are connected to the secondary winding side of described control transformer;
After being connected in series successively, the 3rd normally opened contact of first normally opened contact of described first auxiliary relay, second normally opened contact of described second auxiliary relay and described the 3rd auxiliary relay and the self holding contact of described A.C. contactor be connected in parallel on the both sides of described start button switch.
Wherein, this low-voltage leakage protection circuit also comprises first fuse;
Described first fuse is serially connected between the secondary winding side and described start button switch of described control transformer.
Wherein, this low-voltage leakage protection circuit also comprises first indicator light, second indicator light and the 3rd indicator light;
One end of described first indicator light is connected between described first normally opened contact and described second normally opened contact;
One end of described second indicator light is connected between described second normally opened contact and described the 3rd normally opened contact;
One end of described the 3rd indicator light is connected between described the 3rd normally opened contact and the described self holding contact;
The other end of described first indicator light, described second indicator light and described the 3rd indicator light all is connected between the absorbing coil of described stop button switch and described A.C. contactor.
Wherein, also be provided with plug-in fuse on the three phase transmission line of the grid side of described main contacts.
The utility model also discloses a kind of high--voltage leakage protective circuit, comprises A.C. contactor, first auxiliary relay, second auxiliary relay, the 3rd auxiliary relay, first adjustable resistance, second adjustable resistance, the 3rd adjustable resistance, control transformer, start button switch, stop button switch, first electric capacity, second electric capacity and the 3rd electric capacity;
The main contacts of described A.C. contactor is arranged on the three phase transmission line of load-side;
Each of three phase transmission line between described main contacts and the load goes up mutually and all is connected an adjustable resistance, be respectively described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance, the equal ground connection of the other end of described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance;
One end of described first electric capacity, described second electric capacity and described the 3rd electric capacity is connected on the three phase transmission line between described main contacts and the load; The other end of described first electric capacity, described second electric capacity and described the 3rd electric capacity is connected with an end of described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance respectively;
Described first auxiliary relay, described second auxiliary relay and described the 3rd auxiliary relay respectively with described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance connection in series-parallel;
The absorbing coil of described start button switch and described A.C. contactor and described stop button switch are connected in series the back and are connected to the secondary winding side of described control transformer, the end ground connection that described stop button switch is connected with described secondary winding side;
After being connected in series successively, the 3rd normally opened contact of first normally opened contact of described first auxiliary relay, second normally opened contact of described second auxiliary relay and described the 3rd auxiliary relay and the self holding contact of described A.C. contactor be connected in parallel on the both sides of described start button switch.
Wherein, this high--voltage leakage protective circuit also comprises first fuse:
Described first fuse is serially connected between the secondary winding side and described start button switch of described control transformer.
Wherein, this high--voltage leakage protective circuit also comprises first indicator light, second indicator light and the 3rd indicator light;
One end of described first indicator light is connected between described first normally opened contact and described second normally opened contact;
One end of described second indicator light is connected between described second normally opened contact and described the 3rd normally opened contact;
One end of described the 3rd indicator light is connected between described the 3rd normally opened contact and the described self holding contact;
The other end of described first indicator light, described second indicator light and described the 3rd indicator light all is connected between the absorbing coil of described stop button switch and described A.C. contactor.
Wherein, this high--voltage leakage protective circuit also comprises first solid-state relay, second solid-state relay and the 3rd solid-state relay;
End in two inputs of described first solid-state relay is through the described first electric capacity phase-connecting wire, other end ground connection; End in two outputs of described first solid-state relay connects described first adjustable resistance, and the other end is through the described first auxiliary relay ground connection;
End in two inputs of described second solid-state relay is through the described second electric capacity phase-connecting wire, other end ground connection; End in two outputs of described second solid-state relay connects described second adjustable resistance, and the other end is through the described second auxiliary relay ground connection;
End in two inputs of described the 3rd solid-state relay is through described the 3rd electric capacity phase-connecting wire, other end ground connection; End in two outputs of described the 3rd solid-state relay connects described the 3rd adjustable resistance, and the other end is through described the 3rd auxiliary relay ground connection.
Wherein, described first solid-state relay, second solid-state relay and the 3rd solid-state relay are ac solid relay.
Wherein, also be provided with high-tension fuse on the three phase transmission line of the grid side of described main contacts.
The low pressure of the utility model above-described embodiment and high--voltage leakage protective circuit; ground connection behind series resistor on the three phase transmission line of load-side; auxiliary relay in parallel on resistance; because electric leakage is that one in the three-phase leaks electricity mutually; so three auxiliary relays are set to be detected; when electric leakage takes place when; one three-phase of joining mutually of electric leakage superposes; owing to have one to be same frequency mutually; the phase angle is opposite; can't form voltage difference; this can make after superimposed the voltage at auxiliary relay two ends not reach pickup value to cause auxiliary relay to be released so; the normally opened contact of auxiliary relay disconnects after outage; make the A.C. contactor main contacts that cuts off the power supply then disconnect, thereby make whole load-side outage, play a protective role.
Description of drawings
Fig. 1 is the circuit diagram of an embodiment of low-voltage leakage protection circuit of the present utility model;
Fig. 2 is the circuit diagram of another embodiment of low-voltage leakage protection circuit of the present utility model;
Fig. 3 is the circuit diagram of an embodiment of high--voltage leakage protective circuit of the present utility model.
Embodiment
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
Embodiment one
The utility model embodiment one provides a kind of low-voltage leakage protection circuit; referring to shown in Figure 1, comprise A.C. contactor, the first auxiliary relay KA1, the second auxiliary relay KA2, the 3rd auxiliary relay KA3, the first adjustable resistance R1, the second adjustable resistance R2, the 3rd adjustable resistance R3, control transformer TC, start button switch S B1, stop button switch S B2.
Wherein, the main contacts KM1 of described A.C. contactor is arranged on the three phase transmission line of load-side.Main contacts KM1 is normally opened contact, is the master switch whether control load switches on.
Each of three phase transmission line between described main contacts KM1 and the load goes up mutually and all is connected an adjustable resistance, be respectively the described first adjustable resistance R1, the described second adjustable resistance R2 and described the 3rd adjustable resistance R3, the equal ground connection of the other end of the described first adjustable resistance R1, the described second adjustable resistance R2 and described the 3rd adjustable resistance R3.
The described first auxiliary relay KA1, the described second auxiliary relay KA2 and described the 3rd auxiliary relay KA3 respectively with the described first adjustable resistance R1, the described second adjustable resistance R2 and described the 3rd adjustable resistance R3 connection in series-parallel, the i.e. first auxiliary relay KA1 and the first adjustable resistance R1 connection in series-parallel, the second auxiliary relay KA2 and the second adjustable resistance R2 connection in series-parallel, the 3rd auxiliary relay KA3 and the 3rd adjustable resistance R3 connection in series-parallel.
The resistance of general adjustable resistance does not reach requirement, and therefore, preferably, pressure limiting resistance of series connection in each adjustable resistance when not leaking electricity under like this can normal condition, can not surpass 36V even guarantee that ground wire is charged yet.
The absorbing coil of described start button switch S B1 and described A.C. contactor and described stop button switch S B2 are connected in series the back and are connected to the secondary winding side of described control transformer TC.
After being connected in series successively, the 3rd normally opened contact of second normally opened contact of first normally opened contact of the described first auxiliary relay KA1, the described second auxiliary relay KA2 and described the 3rd auxiliary relay KA3 and the self holding contact km2 of described A.C. contactor be connected in parallel on the both sides of described start button switch S B1.
Press after the start button switch S B1, the absorbing coil of A.C. contactor is switched on and feasible main contacts KM1 and the self holding contact km2 closure often opened, and then the first auxiliary relay KA1, the second auxiliary relay KA2 and the 3rd auxiliary relay KA3 get, make normally opened contact KA1, KA2, the KA3 closure of each auxiliary relay correspondence, KA1, KA2 and KA3 and km2 are all closed, then the of short duration closure of start button switch S B1 and disconnect after, A.C. contactor also can continue.When an electric leakage is arranged in the three phase transmission line; the ground wire electrification of this phase so; make this voltage of going up corresponding auxiliary relay two ends mutually not reach the pick-up voltage of relay; and make that the contact of auxiliary relay can't adhesive; thereby corresponding normally opened contact KA1 or KA2 or KA3 disconnect, thereby make the absorbing coil dead electricity of A.C. contactor, and then main contacts KM1 disconnects; thereby make whole load side electrical circuitry outage, reach the earth leakage protective effect.
Preferably, for the excessive device that burns of the electric current that prevents transformer secondary winding side, referring to shown in Figure 2, this low-voltage leakage protection circuit also comprises the first fuse FU.
The described first fuse FU is serially connected between the secondary winding side and described start button switch S B1 of described control transformer TC.Described fuse mainly plays overcurrent protection.
Preferably, in order to test the sensitivity of this leakage protection circuit, three indicator lights are set also.Referring to shown in Figure 2, this low-voltage leakage protection circuit also comprises the first indicator light L1, the second indicator light L2 and the 3rd indicator light L3.
The end of the described first indicator light L1 is connected between described first normally opened contact and described second normally opened contact; The end of the described second indicator light L2 is connected between described second normally opened contact and described the 3rd normally opened contact; The end of described the 3rd indicator light L3 is connected between described the 3rd normally opened contact and the described self holding contact km2; The other end of the described first indicator light L1, the described second indicator light L2 and described the 3rd indicator light L3 all is connected between the absorbing coil of described stop button switch S B2 and described A.C. contactor.
Above-mentioned leakage protection circuit, before use, should guarantee auxiliary relay get electric after, its normally opened contact can respective action, namely should guarantee in the auxiliary relay the enough pull-cores in magnetic field that the electric current by coil produces, then can't adhesive otherwise electromotive force is too little.Therefore, three indicator lights being set, is the voltage height that detects ground wire in order to regulate.If set when detection voltage is higher than 36V and make relay electric-loss, how we could set so, and this just needs this three indicator lights.
With start button switch S B1 short circuit; the absorbing coil of A.C. contactor continues energising; main contacts KM1 closure; auxiliary relay gets; at this moment; if the voltage at auxiliary relay two ends reaches the pick-up voltage value; then corresponding normally opened contact KA1 or KA2 or KA3 closure; corresponding indicator light L1; L2; L3 should switch on and light, if indicator light does not work, illustrates that then the normally opened contact of this auxiliary relay does not have closure; the voltage that is the auxiliary relay two ends does not reach pick-up voltage; even energising also can't make corresponding contact move, therefore leakage protection circuit at this time is cisco unity malfunction, need adjust it.
At this moment; adjust the resistance value of corresponding adjustable resistance; because auxiliary relay is in parallel with adjustable resistance; therefore; the voltage that the change in voltage of adjustable resistance both sides also influences the auxiliary relay both sides changes thereupon; behind the pick-up voltage that reaches auxiliary relay, then Dui Ying indicator light lights, and then this leakage protection circuit can normally use.
Three indicator lights that low-voltage leakage protection circuit of the present utility model arranges, whether testing circuit can be protected leaky by regular event effectively, has strengthened reliability and the validity of this circuit.
Preferably, also be provided with plug-in fuse on the three phase transmission line of the grid side of described main contacts KM1, the power transmission line at main contacts KM1 place is carried out overcurrent protection.
Need to prove; only show the device that the utility model embodiment one core improvement can be described among Fig. 1 and Fig. 2; and device such as not shown corresponding overcurrent protection, overload protection; those skilled in the art can be replenished relevant safeguard measure according to technical conceive of the present utility model, and the utility model embodiment enumerates one by one.
Embodiment two
The utility model embodiment two provides a kind of high--voltage leakage protective circuit; referring to shown in Figure 3, comprise A.C. contactor, the first auxiliary relay KA1, the second auxiliary relay KA2, the 3rd auxiliary relay KA3, the first adjustable resistance R1, the second adjustable resistance R2, the 3rd adjustable resistance R3, control transformer TC, start button switch S B1, stop button switch S B2, first capacitor C 1, second capacitor C 2 and the 3rd capacitor C 3.
Wherein, the description of the main contacts KM1 of described A.C. contactor and the first adjustable resistance R1, the described second adjustable resistance R2 and described the 3rd adjustable resistance R3 and the described first auxiliary relay KA1, the described second auxiliary relay KA2 and described the 3rd auxiliary relay KA3 is referring to embodiment one, and present embodiment repeats no more.
One end of described first capacitor C 1, described second capacitor C 2 and described the 3rd capacitor C 3 is connected on the three phase transmission line between described main contacts KM1 and the load; The other end of described first capacitor C 1, described second capacitor C 2 and described the 3rd capacitor C 3 is connected with the end of the described first adjustable resistance R1, the described second adjustable resistance R2 and described the 3rd adjustable resistance R3 respectively.
In high-tension circuit, if directly use resistance, so needed resistance is too big, and cost is also high, so add an electric capacity in each adjustable resistance front, so just can play the step-down purpose.
Wherein, the size of electric capacity capacitive reactance should be according to Xc=1/(2 π fC), select, should guarantee that the electric current that is passed through can make that auxiliary relay can regular event.
The absorbing coil of described start button switch S B1 and described A.C. contactor and described stop button switch S B2 are connected in series the back and are connected to the secondary winding side of described control transformer TC, the end ground connection that described stop button switch S B2 is connected with described secondary winding side.
Equally, as described in embodiment one, after being connected in series successively, the self holding contact km2 of second normally opened contact of first normally opened contact of the described first auxiliary relay KA1, the described second auxiliary relay KA2 and the 3rd normally opened contact of described the 3rd auxiliary relay KA3 and described A.C. contactor is connected in parallel on the both sides of described start button switch S B1.
Equally, preferably, this high--voltage leakage protective circuit also comprises the first fuse FU.The described first fuse FU is serially connected between the secondary winding side and described start button switch S B1 of described control transformer TC.
Equally, for the voltage at the auxiliary relay two ends that make this high--voltage leakage protective circuit can reach pick-up voltage, the first indicator light L1, the second indicator light L2 and the 3rd indicator light L3 are set also.
The end of the described first indicator light L1 is connected between described first normally opened contact and described second normally opened contact; The end of the described second indicator light L2 is connected between described second normally opened contact and described the 3rd normally opened contact; The end of described the 3rd indicator light L3 is connected between described the 3rd normally opened contact and the described self holding contact km2; The other end of the described first indicator light L1, the described second indicator light L2 and described the 3rd indicator light L3 all is connected between the absorbing coil of described stop button switch S B2 and described A.C. contactor.
The operation principle of indicator light is described referring to embodiment one, and present embodiment repeats no more.
If the electric current later by electric capacity is too little, sometimes can't detect with auxiliary relay, because solid-state relay also can be reacted to small current signal, sensitivity is higher, uses solid-state relay to detect.So just can be implemented in the protection in the high-tension circuit.Therefore, preferably, this high--voltage leakage protective circuit also comprises the first solid-state relay SSR1, the second solid-state relay SSR2 and the 3rd solid-state relay SSR3.
End in two inputs of the described first solid-state relay SSR1 is through described first capacitor C, 1 phase-connecting wire, other end ground connection; End in two outputs of the described first solid-state relay SSR1 connects the described first adjustable resistance R1, and the other end is through the described first auxiliary relay KA1 ground connection.
End in two inputs of the described first solid-state relay SSR2 is through described first capacitor C, 2 phase-connecting wires, other end ground connection; End in two outputs of the described first solid-state relay SSR2 connects the described first adjustable resistance R2, and the other end is through the described first auxiliary relay KA2 ground connection.
End in two inputs of described the 3rd solid-state relay SSR3 is through described first capacitor C, 3 phase-connecting wires, other end ground connection; End in two outputs of the described first solid-state relay SSR3 connects the described first adjustable resistance R3, and the other end is through the described first auxiliary relay KA3 ground connection.
Described phase line is a phase line in the three phase transmission line between described main contacts KM1 and the load, and a solid-state relay connects a phase line, and three solid-state relays are connected respectively with three phase lines one to one.
Preferably, described first solid-state relay, second solid-state relay and the 3rd solid-state relay are ac solid relay.
Also be provided with high-tension fuse on the three phase transmission line of the grid side of described main contacts KM1.
Need to prove; only show the device that the utility model embodiment two core improvements can be described among Fig. 3; and device such as not shown corresponding overcurrent protection, overload protection; those skilled in the art can be replenished relevant safeguard measure according to technical conceive of the present utility model, and the utility model embodiment two does not enumerate one by one.
This low-voltage leakage protection circuit and high--voltage leakage protective circuit; three normally opened contacts of auxiliary relay are connected in the locked loop of main contacts KM1; have only auxiliary relay to have electric adhesive just can make the main contactor loop carry out self-insurance and start; otherwise send the electric main contactor all can not self-insurance and discharge each time; its reliability height; highly sensitive, can use in the threephase load unbalanced circuit.
Its medium sensitivity is relevant with the adjustable resistance size, if institute's resistance trimming value just in time is the voltage of relay adhesive, sensitivity is just higher so.If the voltage height of the resistance value ratio relay of transferring, sensitivity will reduce.So just can use different occasions.
Simultaneously, this circuit has self-checking function, if the core action component damages, contactor just can not start so.And, those skilled in the art as can be known, this circuit can carry out phase shortage and under-voltage protection.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present utility model or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the utility model is not restricted to any specific hardware and software combination.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. low-voltage leakage protection circuit, it is characterized in that, comprise A.C. contactor, first auxiliary relay, second auxiliary relay, the 3rd auxiliary relay, first adjustable resistance, second adjustable resistance, the 3rd adjustable resistance, control transformer, start button switch, stop button switch;
The main contacts of described A.C. contactor is arranged on the three phase transmission line of load-side;
Each of three phase transmission line between described main contacts and the load goes up mutually and all is connected an adjustable resistance, be respectively described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance, the equal ground connection of the other end of described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance;
Described first auxiliary relay, described second auxiliary relay and described the 3rd auxiliary relay respectively with described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance connection in series-parallel;
The absorbing coil of described start button switch and described A.C. contactor and described stop button switch are connected in series the back and are connected to the secondary winding side of described control transformer;
After being connected in series successively, the 3rd normally opened contact of first normally opened contact of described first auxiliary relay, second normally opened contact of described second auxiliary relay and described the 3rd auxiliary relay and the self holding contact of described A.C. contactor be connected in parallel on the both sides of described start button switch.
2. low-voltage leakage protection circuit according to claim 1 is characterized in that, this low-voltage leakage protection circuit also comprises first fuse;
Described first fuse is serially connected between the secondary winding side and described start button switch of described control transformer.
3. low-voltage leakage protection circuit according to claim 1 is characterized in that, this low-voltage leakage protection circuit also comprises first indicator light, second indicator light and the 3rd indicator light;
One end of described first indicator light is connected between described first normally opened contact and described second normally opened contact;
One end of described second indicator light is connected between described second normally opened contact and described the 3rd normally opened contact;
One end of described the 3rd indicator light is connected between described the 3rd normally opened contact and the described self holding contact;
The other end of described first indicator light, described second indicator light and described the 3rd indicator light all is connected between the absorbing coil of described stop button switch and described A.C. contactor.
4. low-voltage leakage protection circuit according to claim 1 is characterized in that, also is provided with plug-in fuse on the three phase transmission line of the grid side of described main contacts.
5. high--voltage leakage protective circuit, it is characterized in that, comprise A.C. contactor, first auxiliary relay, second auxiliary relay, the 3rd auxiliary relay, first adjustable resistance, second adjustable resistance, the 3rd adjustable resistance, control transformer, start button switch, stop button switch, first electric capacity, second electric capacity and the 3rd electric capacity;
The main contacts of described A.C. contactor is arranged on the three phase transmission line of load-side;
Each of three phase transmission line between described main contacts and the load goes up mutually and all is connected an adjustable resistance, be respectively described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance, the equal ground connection of the other end of described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance;
One end of described first electric capacity, described second electric capacity and described the 3rd electric capacity is connected on the three phase transmission line between described main contacts and the load; The other end of described first electric capacity, described second electric capacity and described the 3rd electric capacity is connected with an end of described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance respectively;
Described first auxiliary relay, described second auxiliary relay and described the 3rd auxiliary relay respectively with described first adjustable resistance, described second adjustable resistance and described the 3rd adjustable resistance connection in series-parallel;
The absorbing coil of described start button switch and described A.C. contactor and described stop button switch are connected in series the back and are connected to the secondary winding side of described control transformer, the end ground connection that described stop button switch is connected with described secondary winding side;
After being connected in series successively, the 3rd normally opened contact of first normally opened contact of described first auxiliary relay, second normally opened contact of described second auxiliary relay and described the 3rd auxiliary relay and the self holding contact of described A.C. contactor be connected in parallel on the both sides of described start button switch.
6. high--voltage leakage protective circuit according to claim 5 is characterized in that, this high--voltage leakage protective circuit also comprises first fuse:
Described first fuse is serially connected between the secondary winding side and described start button switch of described control transformer.
7. high--voltage leakage protective circuit according to claim 5 is characterized in that, this high--voltage leakage protective circuit also comprises first indicator light, second indicator light and the 3rd indicator light;
One end of described first indicator light is connected between described first normally opened contact and described second normally opened contact;
One end of described second indicator light is connected between described second normally opened contact and described the 3rd normally opened contact;
One end of described the 3rd indicator light is connected between described the 3rd normally opened contact and the described self holding contact;
The other end of described first indicator light, described second indicator light and described the 3rd indicator light all is connected between the absorbing coil of described stop button switch and described A.C. contactor.
8. high--voltage leakage protective circuit according to claim 5 is characterized in that, this high--voltage leakage protective circuit also comprises first solid-state relay, second solid-state relay and the 3rd solid-state relay;
End in two inputs of described first solid-state relay is through the described first electric capacity phase-connecting wire, other end ground connection; End in two outputs of described first solid-state relay connects described first adjustable resistance, and the other end is through the described first auxiliary relay ground connection;
End in two inputs of described second solid-state relay is through the described second electric capacity phase-connecting wire, other end ground connection; End in two outputs of described second solid-state relay connects described second adjustable resistance, and the other end is through the described second auxiliary relay ground connection;
End in two inputs of described the 3rd solid-state relay is through described the 3rd electric capacity phase-connecting wire, other end ground connection; End in two outputs of described the 3rd solid-state relay connects described the 3rd adjustable resistance, and the other end is through described the 3rd auxiliary relay ground connection.
9. high--voltage leakage protective circuit according to claim 8 is characterized in that, described first solid-state relay, described second solid-state relay and described the 3rd solid-state relay are ac solid relay.
10. according to each described high--voltage leakage protective circuit of claim 5-9, it is characterized in that, also be provided with high-tension fuse on the three phase transmission line of the grid side of described main contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320212245 CN203205826U (en) | 2013-04-24 | 2013-04-24 | Low voltage and high voltage leakage protection circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320212245 CN203205826U (en) | 2013-04-24 | 2013-04-24 | Low voltage and high voltage leakage protection circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205826U true CN203205826U (en) | 2013-09-18 |
Family
ID=49149894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320212245 Expired - Fee Related CN203205826U (en) | 2013-04-24 | 2013-04-24 | Low voltage and high voltage leakage protection circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203205826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199486A (en) * | 2013-04-24 | 2013-07-10 | 郭永峰 | Low-voltage and high-voltage earth leakage protection circuits |
-
2013
- 2013-04-24 CN CN 201320212245 patent/CN203205826U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199486A (en) * | 2013-04-24 | 2013-07-10 | 郭永峰 | Low-voltage and high-voltage earth leakage protection circuits |
| CN103199486B (en) * | 2013-04-24 | 2016-04-06 | 郭永峰 | Low pressure and high voltage creepage protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103346532B (en) | Electric leakage prevention plug circuit | |
| CN201838982U (en) | Residual current protection device and circuit breaker using same | |
| CN100517896C (en) | Steering circuit for earthing fault breaker | |
| KR20150013105A (en) | device of recovery for open-phase in the power system line | |
| CN104505667A (en) | Voltage conversion type leakage protection plug | |
| CN202424123U (en) | Electric leakage protector with high-sensitivity ground wire electrification protection function | |
| CN202940564U (en) | Three-phase leakage circuit breaker | |
| KR101417940B1 (en) | Cabinet panel for prevention disaster of abnormal voltage protection and method thereof | |
| CN102891471A (en) | Three-phase circuit breaker having zero offset, zero/fire wire reverse connection and fire wire disconnection protection functions | |
| CN204065253U (en) | Earth leakage protective device and the test circuit for this earth leakage protective device | |
| CN104901089A (en) | Switching voltage type leakage protection plug | |
| CN203205826U (en) | Low voltage and high voltage leakage protection circuits | |
| CN202231406U (en) | Earth leakage protection device with earth wire electrified protection function | |
| CN104600663A (en) | Voltage-current hybrid leakage protection plug | |
| KR101234819B1 (en) | Dc leakage current circuit braker | |
| CN103199486B (en) | Low pressure and high voltage creepage protection circuit | |
| CN102842889B (en) | One is tape voltage protection with sensitivity | |
| CN102761098A (en) | Device and method for residual current protection | |
| CN204992530U (en) | Three -phase leakage protection circuit | |
| CN203326559U (en) | Electric leakage protection plug circuit | |
| CN203180491U (en) | Electric leakage protection device | |
| CN102354947B (en) | Leakage protection device with protection function in case of live grounding wire | |
| JP2010183737A (en) | Dc/ac circuit ground fault detecting method in non-grounding ac circuit | |
| CN104505668A (en) | Voltage-current hybrid leakage protective plug | |
| CN201682264U (en) | Leakage protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20140424 |