CN201210614Y - Residual current controlling and monitoring protector - Google Patents
Residual current controlling and monitoring protector Download PDFInfo
- Publication number
- CN201210614Y CN201210614Y CNU2008201169731U CN200820116973U CN201210614Y CN 201210614 Y CN201210614 Y CN 201210614Y CN U2008201169731 U CNU2008201169731 U CN U2008201169731U CN 200820116973 U CN200820116973 U CN 200820116973U CN 201210614 Y CN201210614 Y CN 201210614Y
- Authority
- CN
- China
- Prior art keywords
- termination
- residual current
- connects
- circuit
- terminations
- 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
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 230000001012 protector Effects 0.000 title abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 14
- 230000011664 signaling Effects 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 10
- 230000009471 action Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a control monitoring type residual current protector, mainly used for busway earth leakage protection at a lower voltage side of a power system distribution transformer, when a phase line of the lower voltage circuit is grounded, residual current loop impedance is adjusted automatically through a residual current controller, to limit the size of the current passing through the residual current loop, wherein the person is not hurt by electric shock, circuits does not trip to cut the power, ensuring continuous power supply of the user. The protector is composed of a residual current control circuit, a zero line ground signal detecting circuit, a counting circuit, a phaseline and zero line insulation online monitoring circuit and a overvoltage protector and the like, which controls and detects the ground insulation of the circuit, reduces electric energy loss of the low voltage electric network; the zero line is grounded repeatedly, the phase line cuts off the power when permanently grounded; direct contact protection is realized on a main line of the low voltage network, thereby avoiding electric fires; the utility model has the advantages of complete functions, wide protecting range, fast action, low cost and reliable performance and the like.
Description
Technical field
The utility model relate to a kind ofly be applied in 6, the total protector of 10KV distribution transformer low-pressure side line electrical leakage, specifically, relate to a kind of control monitoring residual current of low-voltage power grid protector.
Background technology
At present, according to the requirement of electric power system low-voltage technology rules, 6,10KV distribution transformer low-pressure side has generally been installed various types of aftercurrent action protecting equipments, but in actual motion, the protection effect of such protective device is not ideal, main cause is when human body touches phase line ground connection on the circuit, voltage that human body bears is current potential relatively, size of current by human body depends on that the human body self situation is (as height, age, fat or thin, health condition etc.) and the environment (as: soil resistivity in electric shock place, air humidity, in the water or high-altitude is medium); Can guarantee that personal safety is also relevant with action sensitivity, the trip time of protector, because the existence of these situations is difficult to the safety after the assurance person gets an electric shock; And for example some transient faults often take place in low voltage electric network, as bad weather, the branch short etc. that blows hard, all will cause the tripping operation of protector frequent movement;
Current, prior art can not be to the insulation situation live monitoring of operating low-voltage distribution network circuit, only breaking down has a power failure just can know, can not advanced processing, if when phase line earthing or zero grounding broken string or wire insulation taking place seriously reducing, search, also difficulty relatively of detection failure point, time-consuming taking a lot of work, effect are also undesirable, cause power supply reliability to reduce, influence social production life and daily life electricity consumption, particularly vast rural power grids are even more serious; Under all helpless situations, some places even protector is out of service can't reach the purpose that protector is installed, and the labour intensity that this has increased the electric power worker virtually also influences the image of electric power enterprise.
In order to overcome the above problems, people are seeking a kind of desirable technical solution always.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art; thereby provide a kind of design science, cost is low, power supply reliability is high, guarantee the residual current of low-voltage power grid control monitoring and protecting device of personal safety, it has overcome frequent tripping operation of existing residual current operated protective device and the non-detectable defective of operating line insulation.To achieve these goals; technical solutions of the utility model are: comprise the residual current control circuit; the zero line grounded inspection circuit; counter circuit; phase line, zero line insulated on-line monitoring circuit, overvoltage protection device, low-voltage load switch; and the normally open contact KE1 of the relay K E in the residual current controller, normally-closed contact KE2.
The residual current control circuit, comprise a zero sequence current mutual inductor TA, 2 resistors are respectively R1, R2, and 3 diodes are respectively V1, V2, V3, a capacitor C1, a comparison amplifier IC, 1 thyristor VS, 1 relay K E, 1 push-button switch SA, the normally-closed contact KE2 of relay K E; Zero sequence current mutual inductor has 4 terminations, is respectively primary side A1, A2, secondary side A3, A4; Comparison amplifier IC has 4 terminations, is respectively 1,2,3,4; Thyristor VS has 3 terminations, is respectively T1, T2, G; Zero sequence current mutual inductor first end A 1 is connected with one termination, normally closed KE2 contact of described relay K E, another termination of normally closed interlock KE2 of relay K E is serially connected among the secondary side winding neutral ground line DN of distribution transformer T, zero sequence current mutual inductor second end A 2 connects earth electrode, zero sequence current mutual inductor the 3rd end A 3 connects resistance R 1 respectively, R2 one termination, zero sequence current mutual inductor the 4th end A 4 respectively with resistance R 1 another termination, diode V1 positive pole, after connecting, the V2 negative pole connects 2 terminations of comparison amplifier IC, resistance R 2 another terminations respectively with diode V1 negative pole, the V2 positive pole, capacitor C1 one termination connects, another termination of capacitor C1 connects 1 termination of comparison amplifier IC, 4 terminations of comparison amplifier IC respectively with thyristor T1 termination, push-button switch SA1 one end connects back ground connection, the termination 3 of comparison amplifier IC connects diode V3 negative pole, V3 is anodal to be connected with the G of thyristor VS, the T2 utmost point of thyristor VS respectively with the push-button switch SA1 other end, relay K E coil one end connects, another termination power of relay K E coil a.
Zero line ground signalling testing circuit: comprise a signal source TX, three resistors are respectively R3, R4, R5, a potentiometer RP1, a capacitor C2; Signal source TX has 4 terminations, be respectively: T1, T2, T3, T4, the signal source TX first termination T1 meets power supply A, the 2nd termination T2 meets power supply N, T3 connecting resistance R4 one termination, the 3rd termination, the termination of the 4th termination T4 termination resistor R3, another termination of resistor R 3 respectively with resistance R 5 one terminations, potentiometer RP1 one termination connects, resistor R 4 another terminations respectively with capacitor C2 one end, resistance R 5 other ends connect back ground connection, export a termination as zero line ground connection detection signal, and another termination of potentiometer RP1 is connected the back and exports another termination as zero line ground connection detection signal with another termination of capacitor C2.
Phase line, zero line insulated on-line monitoring circuit, comprise that 4 indicating devices are respectively HL1, HL2, HL3, HL4,5 resistance are respectively R6, R7, R8, R9, R10, and 4 fuses are respectively FU1, FU2, FU3, FU4, a change over switch QS, a button SA2 and a miliammeter; The normally opened contact KE1 of relay K E in the residual current controller, described change over switch have a moving contact, and 5 fixed contacts are respectively a, b, c, n, o.
Wherein, the moving contact of described change over switch QS is connected with described miliammeter one end, and the termination of described button SA2 is connected with the other end of miliammeter, and another termination of button SA2 is connected with resistor R 10 1 ends.Indicating device HL1, HL2, HL3, HL4 one end respectively with the residual current controller in normally opened contact KE1 one end of relay, the R10 other end connects, another termination of indicating device HL1, HL2, HL3, HL4 respectively with the end of resistance R 6, R7, R8, R9, moving contact a, the b of change over switch QS, c, n termination connect, the other end of resistance R 6, R7, R8, R9 is connected with the end of described fuse FU1, FU2, FU3, FU4 respectively, and the other end of described fuse FU1, FU2, FU3, FU4 connects power supply A, B, C phase line and zero line N respectively; Another termination earth electrode of the normally opened contact KE1 of relay K E in the residual current controller.
Counter circuit comprises two resistance R 11, R12, potentiometer RP2, counter D, solid-state relay SSR; Wherein counter D has 3 terminations, is respectively 1,2,3, and solid-state relay SSR has 4 terminations, is respectively S1, S2, S3, S4; Resistance R 11 1 termination residual current signal source M end, another termination potentiometer of R11 RP2 one end, the termination 1 of another termination counter of RP2 D, termination 2 ground connection of counter D, 3 termination resistor R12, one termination, termination of counter D, another termination of R12 meets the termination S1 of solid-state relay SSR, solid-state relay SSR termination S2 ground connection, termination S4 connects on-load switch and separates release circuit a, and termination S3 meets the b that on-load switch separates the release circuit.
The utlity model has following advantage:
1. can control residual current of low-voltage power grid automatically; when the phase line on the human body contact circuit; can only be in the human body by the safe current that configures, environment whatsoever, any condition can both be guaranteed personal safety; circuit does not trip simultaneously; keep power supply continuously, really realized installing the purpose of protector, reduced worker's labour intensity; improve power supply reliability, increased the benefit of society and enterprise.
2. can Automatic Detection and Control zero line ground connection, phase line earth fault is avoided the expansion of accident, has reduced national property loss.
3. can when circuit moves, monitor phase line, zero line insulation against ground state, in time find out the guilty culprit phase, shorten fault handling time, reduce the line-to-ground leakage current, reduce the energy loss of low voltage electric network;
4. this apparatus structure is simple, is skillfully constructed, and design science is reasonable, uses simple and convenient.
Description of drawings
Fig. 1 is a circuit principle structure block diagram of the present utility model;
Fig. 2 is residual current control circuit figure described in the utility model;
Fig. 3 is zero line ground signalling testing circuit figure described in the utility model;
Fig. 4 is phase line described in the utility model, zero line insulated on-line monitoring circuit diagram;
Fig. 5 is a counting circuitry described in the utility model
Embodiment
For making the technical solution of the utility model clearer, embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.
Figure 1 shows that a kind of residual current of low-voltage power grid control monitoring and protecting device, comprise residual current control circuit 1, zero line grounded inspection circuit 2, phase line, zero line insulated on-line monitoring circuit 3, counting circuit 4, the secondary side winding neutral ground line DN of distribution transformer T, lightning arrester F, executive component release 5, and by the on-load switch Q of described release 5 controls; The normally opened contact KE1 of relay K E in the residual current controller 1, normally-closed contact KE2.
When the low voltage electric network leakage current of being controlled reaches current relay KE operating value (about 8mA), this relay adhesive, normally closed interlock disconnects, this moment, loop of electric leakage disconnected, connect phase line after the relay normally open contact closure, zero line insulating monitoring circuit indicates the concrete phase of ground path.This moment, network system was an isolated neutral system, if on the circuit accident of human electric shock is taken place, electric shock person can only be by the current value of 8mA, disconnected in 1～2 second time current loop again, and the voltage that human body bore, electric current all are safety values, the protective device power failure of not tripping.
After zero line earth detector 2 detected the zero line ground signalling, power grid security was guaranteed in executive component tripping operation (because zero line iterative earthing protector is malfunctioning) behind the time-delay 2S.
Phase line, zero line insulated on-line monitoring device 3, after disconnecting Circuit Fault on Secondary Transformer neutral ground line, residual current controller 1 checks, when if certain phase line insulation seriously reduces, also can adopt change over switch to connect each line respectively, utilize miliammeter to measure leakage current value, check targetedly, shorten and search the earth fault time.
Fig. 2 is the residual current control circuit, comprises a zero sequence current mutual inductor TA, 2 resistors, be respectively R1, R2,3 diodes are respectively V1, V2, V3, a capacitor C1, a comparison amplifier IC, 1 thyristor VS, 1 relay K E, 1 push-button switch SA, the normally-closed contact KE2 of relay K E, zero sequence current mutual inductor has 4 terminations, is respectively primary side A1, A2, secondary side A3, A4; , described comparison amplifier IC has 4 terminations, is respectively 1,2,3,4; Described thyristor VS has 3 terminations, is respectively T1, T2, G.Zero sequence current mutual inductor first end A 1 is succeeded one termination, normally closed KE2 contact of electrical equipment KE, another termination of normally closed interlock KE2 of relay K E is serially connected among the secondary side winding neutral ground line DN of distribution transformer T, zero sequence current mutual inductor second end A 2 connects earth electrode, zero sequence current mutual inductor the 3rd end A 3 connects resistance R 1 respectively, R2 one termination, zero sequence current mutual inductor the 4th end A 4 respectively with resistance R 1 another termination, diode V1 positive pole, after connecting, the V2 negative pole connects 2 terminations of comparison amplifier IC, resistance R 2 another terminations respectively with diode V1 negative pole, the V2 positive pole, capacitor C1 one termination connects, another termination of capacitor C1 connects 1 termination of comparison amplifier IC, 4 terminations of comparison amplifier IC respectively with thyristor T1 termination, push-button switch SA1 one end connects back ground connection, the termination 3 of comparison amplifier IC connects diode V3 negative pole, diode V3 is anodal to be connected with the G termination of thyristor VS, the T2 utmost point of described thyristor VS respectively with the push-button switch SA1 other end, relay K E coil one end connects, another termination power of relay K E coil a.
When circuit generation phase line earth fault, the zero sequence current mutual inductor primary winding gets, produce resistance value according to size of current immediately, leakage current is limited in the personal safety electric current, after the zero sequence current mutual inductor secondary coil induces electric leakage signal, by amplifying, judging, conducting thyristor VS as greater than set point the time, relay K E adhesive disconnects the transformer neutral point earth connection, connect the line insulation observation circuit, indicate that phase line ground connection is taken place.Push-button switch SA1 is used for just often checking the line insulation situation.
Fig. 3 is a zero line ground signalling testing circuit: comprise a signal source TX, three resistors are respectively R3, R4, R5, a potentiometer RP1, a capacitor C2; Signal source TX has 4 terminations, be respectively: T1, T2, T3, T4, the signal source TX first termination T1 meets power supply A, the 2nd termination T2 meets power supply N, T3 connecting resistance R4 one termination, the 3rd termination, the termination of the 4th termination T4 termination resistor R3, another termination of resistor R 3 respectively with resistance R 5 one terminations, potentiometer RP1 one termination connects, resistor R 4 another terminations respectively with capacitor C2 one end, resistance R 5 other ends connect back ground connection, export a termination as the zero line ground signalling, and another termination of potentiometer RP1 is connected the back and exports another termination as the zero line ground signalling with another termination of described capacitor C2.When detecting zero line iterative earthing is arranged, send signal and disconnecting power switch immediately.
Fig. 4 is phase line, zero line insulated on-line monitoring circuit, comprise 4 indicating devices be respectively HL1, HL2, HL3,, HL4,5 resistance are respectively R6, R7, R8, R9, R10,4 fuses are respectively FU1, FU2, FU3, FU4, a change over switch QS, a button SA2 and a miliammeter; The normally opened contact KE1 of relay K E in the residual current controller, described change over switch have a moving contact, and 5 fixed contacts are respectively a, b, c, n, o;
The moving contact of change over switch QS is connected with described miliammeter one end, and the termination of button SA2 is connected with the other end of miliammeter, and another termination of button SA2 is connected with resistor R 10 1 ends.Indicating device HL1, HL2, HL3, HL4 one end respectively with the residual current controller in normally opened contact KE1 one end of relay, resistance R 10 other ends connect, another termination of indicating device HL1, HL2, HL3, HL4 respectively with the end of resistance R 6, R7, R8, R9, change over switch QS fixed contact a, b, c, n termination connect, the other end of resistance R 6, R7, R8, R9 is connected with the end of fuse FU1, FU2, FU3, FU4 respectively, and the other end of fuse FU1, FU2, FU3, FU4 connects power supply A, B, C phase line and zero line N respectively.Another termination earth electrode of the normally opened contact KE1 of relay K E in the residual current controller.
When outer circuit had phase ground connection or the serious reduction of insulation, leakage detector extinguished, and the indicator light on the zero line is luminous; Know leakage current when size of each circuit, operation change over switch QS, press the button SB2 just can on miliammeter, read leakage current how much, the QS switch movable contact can be put into the position of neutral gear 0 when not detecting.
This phase line, zero line insulated on-line monitoring device are safeguarded low-voltage equipment provides convenience, has shortened the repair time, has improved the power supply reliability of electrical network.
Fig. 5 is a counter circuit, comprises two resistance R 11, R12, potentiometer RP2, counter D, solid-state relay SSR; Counter D has 3 terminations, is respectively 1,2,3, and solid-state relay SSR has 4 terminations, is respectively S1, S2, S3, S4; Resistance R 11 1 termination residual current signal source M end, resistance R 11 another termination potentiometer RP2 one end, the termination 1 of another termination counter of RP2 D, termination 2 ground connection of counter D, 3 termination resistor R12, one termination, termination of counter D, another termination of R12 meets the termination S1 of solid-state relay SSR, solid-state relay SSR termination S2 ground connection, termination S3 connects on-load switch and separates release circuit a, and termination S4 meets the b that on-load switch separates the release circuit.When the phase line continuous earth, the electric leakage signal that zero sequence current mutual inductor TA detects repeats adhesive by relay K E, makes its KE normally-closed contact KE1 carry out the repetition break-make, and relay is after the adhesive second time at this moment, and the tripping operation of effective call meter executive circuit has a power failure.
Should be noted that at last: above embodiment is its restriction of opposing in order to the explanation the technical solution of the utility model only; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that; Still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (4)
1. a residual current is controlled the monitoring and protecting device, it is characterized in that: comprise the residual current control circuit, the zero line grounded inspection circuit, counter circuit, phase line, zero line insulated on-line monitoring circuit, overvoltage protection device, low-voltage load switch, and the normally open contact KE1 of the relay K E in the residual current controller, normally-closed contact KE2;
Described residual current control circuit, comprise a zero sequence current mutual inductor TA, 2 resistors are respectively R1, R2, and 3 diodes are respectively V1, V2, V3, a capacitor C1, a comparison amplifier IC, 1 thyristor VS, 1 relay K E, 1 push-button switch SA, the normally-closed contact KE2 of described relay K E;
Described zero sequence current mutual inductor has 4 terminations, is respectively: A1, A2, A3, A4, and described comparison amplifier IC has 4 terminations, is respectively 1,2,3,4, and described thyristor VS has 3 terminations, is respectively T1, T2, G;
Wherein, described zero sequence current mutual inductor end A 1 is connected with one termination, normally closed KE2 contact of described relay K E, another termination of normally closed interlock KE2 of relay K E is serially connected among the secondary side winding neutral ground line DN of distribution transformer T, described zero sequence current mutual inductor end A 2 connects earth electrode, described zero sequence current mutual inductor end A 3 respectively with described resistance R 1, R2 one termination connects, described zero sequence current mutual inductor end A 4 respectively with described resistance R 1 another termination, described diode V1 positive pole, after connecting, the V2 negative pole connects 2 terminations of described comparison amplifier IC, described resistance R 2 another terminations respectively with described diode V1 negative pole, the V2 positive pole, described capacitor C1 one termination connects, another termination of described capacitor C1 connects 1 termination of described comparison amplifier IC, 4 terminations of described comparison amplifier IC respectively with described thyristor T1 termination, described push-button switch SA1 one end connects back ground connection, the termination 3 of described comparison amplifier IC connects described diode V3 negative pole, described diode V3 is anodal to be connected with the G of described thyristor VS, the T2 utmost point of described thyristor VS respectively with the described push-button switch AS1 other end, described relay K E coil one end connects, another termination power of relay K E coil a.
2. residual current control monitoring and protecting device according to claim 1 is characterized in that: described zero line ground signalling testing circuit, comprise a signal source TX, and three resistors are respectively R3, R4, R5, a potentiometer RP1, a capacitor C2;
Wherein, described signal source TX has 4 terminations, be respectively: T1, T2, T3, T4, described signal source TX termination T1 meets power supply A, termination T2 meets power supply N, T3 connecting resistance R4 one termination, termination, termination T4 connects a termination of described resistor R 3, another termination of described resistor R 3 respectively with described resistance R 5 one terminations, potentiometer RP1 one termination connects, described resistor R 4 another terminations respectively with described capacitor C2 one end, described resistance R 5 other ends connect back ground connection, export a termination as the zero line ground signalling, another termination of described potentiometer RP1 is connected the back and exports another termination as the zero line ground signalling with another termination of described capacitor C2.
3. residual current control monitoring and protecting device according to claim 1, it is characterized in that: phase line, zero line insulated on-line monitoring circuit, comprise that 4 indicating devices are respectively HL1, HL2, HL3, HL4,5 resistance are respectively R6, R7, R8, R9, R10,4 fuses are respectively FU1, FU2, FU3, FU4, a change over switch QS, a button SA2 and a miliammeter, the normally opened contact KE1 of relay K E in the residual current controller, described change over switch has a moving contact, 5 fixed contacts are respectively a, b, c, n, o;
Wherein, the moving contact of described change over switch QS is connected with described miliammeter one end, the termination of described button SA2 is connected with the other end of described miliammeter, another termination of described button SA2 is connected with described resistor R 10 1 ends, described indicating device HL1, HL2, HL3, HL4 one end respectively with described residual current controller in normally opened contact KE1 one end of relay, described resistance R 10 other ends connect, described indicating device HL1, HL2, HL3, another termination of HL4 respectively with described resistance R 6, R7, R8, the end of R9, described change over switch QS fixed contact a, b, c, the n termination connects, described resistance R 6, R7, R8, the other end of R9 respectively with described fuse FU1, FU2, FU3, the end of FU4 connects, described fuse FU1, FU2, FU3, the other end of FU4 connects power supply A respectively, B, C phase line and zero line N, another termination earth electrode of the normally opened contact KE1 of the relay K E in the described residual current controller.
4. residual current control monitoring and protecting device according to claim 1, it is characterized in that: described counter circuit comprises two resistance R 11, R12, potentiometer RP2, counter D, solid-state relay SSR;
Wherein, described counter D has 3 terminations, is respectively 1,2,3, and described solid-state relay SSR has 4 terminations, is respectively S1, S2, S3, S4; Described resistance R 11 1 termination residual current signal source M end, described potentiometer RP2 one end of another termination of R11, the termination 1 of the described counter D of another termination of RP2, termination 2 ground connection of described counter D, the termination 3 of described counter D connects described resistor R 12 1 terminations, and another termination of R12 meets the termination S1 of solid-state relay SSR, described solid-state relay SSR termination S2 ground connection, termination S4 connects on-load switch and separates release circuit a, and termination S3 meets the b that on-load switch separates the release circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201169731U CN201210614Y (en) | 2008-05-23 | 2008-05-23 | Residual current controlling and monitoring protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201169731U CN201210614Y (en) | 2008-05-23 | 2008-05-23 | Residual current controlling and monitoring protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210614Y true CN201210614Y (en) | 2009-03-18 |
Family
ID=40481350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201169731U Expired - Fee Related CN201210614Y (en) | 2008-05-23 | 2008-05-23 | Residual current controlling and monitoring protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201210614Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577979A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Novel residual current circuit-breaker circuit |
| CN104749486A (en) * | 2015-02-13 | 2015-07-01 | 王金全 | Residual current protector based IT system single-phase fault positioning method |
| CN107492881A (en) * | 2017-09-13 | 2017-12-19 | 邓周中 | Blanking power supply protection device over the ground |
| CN107561413A (en) * | 2017-10-19 | 2018-01-09 | 南京科瑞电力科技有限公司 | A kind of electric power power transmission and transformation Intelligent failure monitoring device |
| CN113675818A (en) * | 2021-08-18 | 2021-11-19 | 龙跃潮 | System for be used for low pressure IT power supply system leakage protection |
-
2008
- 2008-05-23 CN CNU2008201169731U patent/CN201210614Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577979A (en) * | 2015-01-28 | 2015-04-29 | 长城电器集团有限公司 | Novel residual current circuit-breaker circuit |
| CN104749486A (en) * | 2015-02-13 | 2015-07-01 | 王金全 | Residual current protector based IT system single-phase fault positioning method |
| CN104749486B (en) * | 2015-02-13 | 2017-12-05 | 王金全 | A kind of IT system single-phase fault localization method based on residual current operated protective device |
| CN107492881A (en) * | 2017-09-13 | 2017-12-19 | 邓周中 | Blanking power supply protection device over the ground |
| CN107561413A (en) * | 2017-10-19 | 2018-01-09 | 南京科瑞电力科技有限公司 | A kind of electric power power transmission and transformation Intelligent failure monitoring device |
| CN113675818A (en) * | 2021-08-18 | 2021-11-19 | 龙跃潮 | System for be used for low pressure IT power supply system leakage protection |
| CN113675818B (en) * | 2021-08-18 | 2023-12-29 | 湖南亲和市电科技有限公司 | System for leakage protection of low-voltage IT power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101145683B (en) | Control device for residual current of low-voltage power grid | |
| CN104076243B (en) | A kind of small current neutral grounding one-phase earthing failure in electric distribution network detection indicating means and equipment | |
| CN201210614Y (en) | Residual current controlling and monitoring protector | |
| CN105846416A (en) | Lightning prevention and ground potential high-voltage counterattack suppression protection circuit of power line | |
| CN201066671Y (en) | Monitoring residual current action protection relay | |
| CN103823160A (en) | Self-adaption ground fault line selection method and device for power distribution network | |
| CN101350514B (en) | Current-limiting arc-extinguishing shunted exciter tripping type earthing short circuit protection device | |
| CN201243193Y (en) | Low-voltage electric network residual current control monitoring type protector | |
| CN101872956B (en) | Leakage current detection protection circuit | |
| CN101872957B (en) | Leakage current detection protection circuit | |
| CN202940564U (en) | Three-phase leakage circuit breaker | |
| CN100370664C (en) | Arc and leakage protector | |
| CN103762557B (en) | The anti-open-circuit-protection method of current transformer | |
| CN104065034A (en) | Low-voltage failure detector | |
| CN201515205U (en) | Earth leakage checking protective circuit | |
| WO2022228474A1 (en) | Box-type transformer with signal surge protector | |
| CN206076967U (en) | Microgrid intelligent grid connection cabinet | |
| CN202495803U (en) | Isolation power supply cabinet used in medical treatment II type place | |
| CN205429697U (en) | Type B residual current operated circuit breaker | |
| CN101895088A (en) | Leakage detection protection circuit | |
| CN201422009Y (en) | Leakage detection and protection circuit | |
| CN101227074A (en) | Method for making earth leakage protection without action dead region and breaker thereof | |
| CN203951163U (en) | Low voltage failure detector | |
| CN201138735Y (en) | Low-voltage electric grid residual current controlling, protecting and loss reducing apparatus | |
| CN201556935U (en) | Automatic control aftercurrent protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HENAN BOTE ELECTRIC APPLICANCE CO., LTD. Free format text: FORMER OWNER: CHEN JIABIN Effective date: 20090814 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090814 Address after: No. 11, Indus Road, South Development Zone, Henan, Zhumadian Province, China: 463000 Patentee after: Henan Bote Electric Co., Ltd. Address before: 144, lane two, Yicheng District, Yicheng District, Henan, Zhumadian Province, Jiefang Road, China: postcode: 463000 Patentee before: Chen Jiabin |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20110523 |