CN2106432U - High voltage combined protection relay device - Google Patents
High voltage combined protection relay device Download PDFInfo
- Publication number
- CN2106432U CN2106432U CN 91222317 CN91222317U CN2106432U CN 2106432 U CN2106432 U CN 2106432U CN 91222317 CN91222317 CN 91222317 CN 91222317 U CN91222317 U CN 91222317U CN 2106432 U CN2106432 U CN 2106432U
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- China
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- circuit
- operational amplifier
- output
- inverting input
- resistance
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Abstract
The utility model belongs to the protection device of the electrical apparatus in the electric power system. The electronic leakage protecting portion of the utility model comprises an amplitude value amplifying circuit, a dressing differential circuit, a time delaying executive holding circuit and a phase demodulation and amplitude discrimination circuit. The current protection portion of the utility model comprises a rectifying filter circuit, an amplitude value conversion circuit and one corresponding path of a bleeder, a magnitude comparator, an executive holding circuit, another corresponding path of a bleeder, a linear amplification circuit, a magnitude comparator, a time delaying circuit and an executive holding circuit. The monitoring protective portion of the utility model comprises a short circuit identification circuit, a broken circuit identification circuit, an OR gate circuit, a time delaying circuit and an executive holding circuit. The utility model with high reliable performance has a strong interference killing feature in bad working site and the occurrence of false action can be prevented.
Description
The utility model belongs in the electric power system protective device to electric equipment.
In a lot of industrial power supply systems, for ensureing the normal operation of electric power system, guarantee the electric equipment operate as normal, avoid human casualty accident, reduce economic loss.According to the relevant production safety regulations of country, corresponding electric power system, power supply unit must be furnished with safety precautions.GBZJ-1 type high pressure integrated protection relay commonly used is used for electric equipment single-phase electric leakage, overload is taken place or by short trouble exactly, and the safety guard when causing overcurrent.This device causes phase mutual interference and poor reliability because its detection of electrical leakage unit adopts phase place and amplitude is that one tunnel control is finished; Monitor unit adopts the reference signal of alternating current source as circuit, influenced by the network operation voltage fluctuation and debug difficulties, job insecurity; What current unit adopted is that transducer signal was supplied with current circuit and quick-break circuit with the series connection form, and each grade value influences each other, phase mutual interference between each parameter, and one becomes complete becomes the phenomenon of being failure to actuate when being easy to this action occur.
The purpose of this utility model is the shortcoming at above-mentioned existence, and a kind of dependable performance is provided, and does not disturb mutually, the high pressure comprehensive protector of good stability.
Technical essential of the present utility model is:
It is made of earth leakage protective part, monitor protection part, current protection part and dual system working power etc.It is characterized in that earth leakage protective partly comprises amplitude amplifying circuit, shaping differential circuit, phase demodulation amplitude discrimination circuit, time-delay and carries out holding circuit.The amplitude amplifying circuit connects the preposition resistance R of current transformer in the earth leakage protective part
1Through toggle switch K
1The resistance R that links to each other
2Select resistance R
3Or R
4, R
5Send operational amplifier U
1In-phase input end, operational amplifier U
1Output through the diode D of current rectifying and wave filtering circuit
1And capacitor C
2, meet the operational amplifier U of amplitude discriminator
2Inverting input, operational amplifier U
2Output is to the operational amplifier U of phase demodulation amplitude discrimination circuit
4In-phase input end, operational amplifier U
1Output is simultaneously through being used for the operational amplifier U of shaping
3And differential capacitance C
3, resistance R
16, send the operation amplifier U of phase demodulation amplitude discrimination circuit
4Inverting input, operational amplifier U
4The operational amplifier U of output termination delay circuit
5Inverting input, U
5Output is connected to the operational amplifier U that carries out holding circuit with the Resistor-Capacitor Unit that constitutes selection of time
7Inverting input, U
7Output relay termination J
1The voltage signal that zero sequential potential transformer provides is through resistance R
20, R
21The operational amplifier U that divides force feed shaping phase-shift circuit
6Inverting input, U
6Output connect the operational amplifier U of phase demodulation amplitude discrimination circuit
4In-phase input end.Current protection partly comprises current rectifying and wave filtering circuit, amplitude transformation circuit and corresponding road voltage divider, magnitude comparator, execution holding circuit, another road voltage divider, ratio amplifying circuit, magnitude comparator, delay circuit, execution holding circuit.The current transformer load RF of current protection part
1Or RF
2End is through the diode D of current rectifying and wave filtering circuit
14Or D
15And capacitor C
7-8, resistance R
35, meet the operational amplifier U of amplitude transformation circuit
8Inverting input, U
8Output to operational amplifier U
9Inverting input, U
9Output is by the voltage divider K switch
3The operational amplifier U that connects magnitude comparator
10Inverting input, U
10The output termination is carried out the relay J of holding circuit
2U
9Output is simultaneously by the voltage divider K switch
4The operation amplifier U that connects magnitude comparator
12Operational amplifier U with proportional amplifier
11In-phase input end, U
11And U
12Output connect the operational amplifier U that carries out holding circuit through the delay circuit that Resistor-Capacitor Unit constitutes
13Inverting input compares, U
13Output is to relay J
3Monitor that retaining part comprises the short circuit identification circuit, the identification circuit that opens circuit, OR circuit, delay circuit and execution holding circuit.The operational amplifier U of short circuit identification circuit in the monitor protection part
14Operational amplifier U with the identification circuit that opens circuit
15In-phase input end all links to each other with monitoring cable, U
14And U
15Output all meet the operational amplifier U of OR circuit
16In-phase input end, U
16The delay circuit that output constitutes by Resistor-Capacitor Unit is to the operational amplifier U that carries out holding circuit
17Inverting input, U
17Output connects relay J
4In the earth leakage protective part zero sequence current mutual inductor output signal is divided into two-way earlier after amplifying; one tunnel control phase; one tunnel control amplitude; changed the signal of a road in the traditional product because phase place, amplitude are regardless of, thereby and interactive situation make line clear, reliable, easy to adjust, interchangeability is good.Current protection has partly adopted impedance conversion, has solved load capacity and has made the anti-time in limited time be forbidden to reach interactional problem between overcurrent, quick-break inadequately.Because load capacity is strong, it is separate to adopt the parallel resistance dividing potential drop to make between each gear, has solved interactional problem between each grade of series connection dividing potential drop parameter in the past.
The utility model has adopted new circuit structure, makes it have than strong anti-interference ability in the working site of inclement condition, has avoided the misoperation generation, the unfailing performance height.Owing to used a large amount of integrated circuits, its volume is little, in light weight, highly sensitive.Be suitable for the protection such as electric leakage, overcurrent of supply lines such as colliery, metallurgy, oil, chemical industry and power supply unit.
Description of drawings:
Fig. 1 is an earth leakage protective part block diagram of the present utility model.
Fig. 2 is a current protection part block diagram of the present utility model.
Fig. 3 is a monitor protection part block diagram of the present utility model.
Fig. 4 is an earth leakage protective partial circuit schematic diagram of the present utility model.
Fig. 5 is a current protection partial circuit schematic diagram of the present utility model.
Fig. 6 is a monitor protection partial circuit schematic diagram of the present utility model.
When electric power system or the single-phase electric leakage of electric equipment generation, because the three-phase circuit imbalance produces zero sequence current signal by external zero sequence current mutual inductor DL, zero sequential potential transformer DY produces the residual voltage signal, and zero sequence current signal is through resistance R
1, become a voltage signal (see figure 4), through K switch
1And resistance R
2, R
3, R
4, R
5The voltage divider dividing potential drop of forming is to select different operating current values, by R
2The voltage signal that the place obtains is introduced into by amplifier U
1And resistance R
6, R
7, R
8The amplitude amplifier of forming is divided into two-way after amplifying, and one the tunnel through D
1, C
2The current rectifying and wave filtering circuit of forming becomes DC level, has only when zero-sequence current reaches certain amplitude, and this level could pass through by R
11, R
12Amplifier U
2The amplitude discriminator of forming enters by D
4Resistance R
25, R
17And amplifier U
4The amplitude discrimination phase discriminator of forming.Another road is through resistance R
13Go into amplifier U
3, through amplifier U
3Shaping, C
3, R
16Differential circuit produces a spike, enters the amplitude discrimination phase discriminator equally.The residual voltage that while is produced by zero sequential potential transformer is through resistance R
20, R
21Taking out signal after the dividing potential drop sends into by resistance R
23, R
24And amplifier U
6The shaping phase-shift circuit of forming produces square wave and enters the phase demodulation amplitude discrimination circuit.Like this, to there be three road signals to enter the amplitude discrimination phase discriminator simultaneously, have only between the square wave that differential spike that zero-sequence current produces and residual voltage are produced and meet the requirements of phase relation, and the zero-sequence current value also is that the electrical leakage of electric power system or electric equipment is when reaching certain amplitude, the amplitude discrimination phase discriminator could move, and the action back is by amplifier U
5, resistance R
18, R
19, R
26, R
27, R
28, R
29, capacitor C
4, C
6The delay circuit time-delay of forming is after confirming the instantaneous interference signal of right and wrong, by amplifier U
7, resistance R
32, diode D
10, D
11, relay J
1The execution holding circuit action of forming, and keep this operate condition.
When overload takes place or causes big electric current owing to short trouble in electric power system or electric equipment, first LH through current transformer LH
1(A phase) or LH
2(C phase) load electricity RF
1Or RF
2Produce an alternating voltage (see figure 5), through diode D
14Or D
15Rectification, C
7, R
35, C
8Become direct voltage after the pi type filter filtering of forming, send into by resistance R
36, R
37And amplifier U
8The amplitude transformation circuit of forming, its effect are that the assurance system has good linear output at 2A-50A on a large scale, and this output signal process is by resistance R
38, R
39And amplifier U
9Be divided into two-way after the inverter of forming is anti-phase, the one tunnel is quick-break (preventing short trouble), through R
40, R
41, R
42The voltage divider dividing potential drop of forming (to reach the purpose of selecting different operating current values) is through resistance R
43Directly send into by amplifier U
10The comparator of forming, under a certain gear, when the current value behind a rated transformation ratio surpasses selected gear value, comparator upset, executive circuit relay J
2Action is through diode D
13Resistance R
44Continue to keep this operate condition.Another road is overcurrent (preventing overload), earlier via resistance R
47-1, R
47-2, R
48The voltage divider dividing potential drop of forming is to select different operating current values, from R
48The voltage signal that the place obtains is further divided into two-way, and one the tunnel via resistance R
49, R
50, R
51And amplifier U
11The proportional amplifier of forming amplifies, to satisfy by resistance R
52, R
53Capacitor C
9The delay time of the absorbing current of the delay circuit of forming and assurance delay circuit is with satisfying certain functional relation between the current value under the different gears.Another road is through resistance R
52Directly send into comparator U
12, under a certain gear, when the current value behind a rated transformation ratio surpasses selected gear value, comparator U
12Upset, this moment, timing circuit picked up counting, and worked as capacitor C
9Positive terminal potential when surpassing earth potential, comparator U
13Upset, the executive circuit relay J
3Action is via diode D
18, resistance R
55, R
54Make this operate condition continue to keep.
The shielding heart yearn and shielding earth one end that will be monitored cable during work directly inserts the short circuit identification circuit, the identification circuit that opens circuit, and other end connecting terminal element (in the frame of broken lines).When the insulation resistance between the shielding heart yearn that is monitored cable and shielding heart yearn and the shielding earth exceeds the given range value, by divider resistance R
57, R
58, in resistance R
58On the d. c. voltage signal rising (see figure 6) that obtains, this signal value passes through resistance R
62Send into by resistance R
63, R
64And amplifier U
15The in-phase input end of the identification circuit of forming that opens circuit, amplifier U at this moment
15Positive input work that (concrete parameter value is by transferring potentiometer W
3Obtain), its output level is turned into high level, equally when the loop resistance between shielding heart yearn that is monitored cable and the shielding earth during less than the given range value, by divider resistance R
57, R
58In resistance R
58On the d. c. voltage signal that obtains reduce, this signal passes through resistance R
59Go into by resistance R
60, R
61And amplifier U
14The reverse input end of the short circuit identification circuit of forming, amplifier U at this moment
14Positive input work that (concrete parameter value is by transferring potentiometer W
2Obtain), its output level is turned into high level, no matter U
14, U
15The upset of that amplifier, its high level all will be by by amplifier U
16The OR circuit that constitutes is through R
66, C
10The RC circuit delay of forming, after confirming the instantaneous interference signal of right and wrong, amplifier U
17Upset, the executive component relay J
4Action, and by diode D
23And resistance R
68, R
67The holding circuit of forming keeps this operate condition.
Relay J
1-4Action all drives the relay J that links to each other with power consumption equipment
5, in order to disconnect power consumption equipment.Operational amplifier U among the figure
1-U
17Model is LM324, and the FW among Fig. 5, Fig. 6 is a reset key.
Claims (1)
1, a kind of high pressure integrated protection relay system is made of earth leakage protective part, monitor protection part, current protection part and dual system working power etc., it is characterized in that:
The amplitude amplifying circuit connects the preposition resistance R of current transformer in a, the earth leakage protective part
1Through toggle switch K
1The resistance R that links to each other
2Select resistance R
3Or R
4, R
5Send operational amplifier U
1In-phase input end, operational amplifier U
1Output through the diode D of current rectifying and wave filtering circuit
1And capacitor C
2, meet the operational amplifier U of amplitude discriminator
2Inverting input, operational amplifier U
2Output is to the operational amplifier U of phase demodulation amplitude discrimination circuit
4In-phase input end, operational amplifier U
1Output is simultaneously through being used for the operational amplifier U of shaping
3And differential capacitance C
3, resistance R
16, send the operation amplifier U of phase demodulation amplitude discrimination circuit
4Inverting input, operational amplifier U
4The operational amplifier U of output termination delay circuit
5Inverting input, U
5Output is connected to the operational amplifier U that carries out holding circuit with the Resistor-Capacitor Unit that constitutes selection of time
7Inverting input, U
7Output relay termination J
1The voltage signal that zero sequential potential transformer provides is through resistance R
20, R
21The operational amplifier U that divides force feed shaping phase-shift circuit
6Inverting input, U
6Output connect the operational amplifier U of phase demodulation amplitude discrimination circuit
4In-phase input end.
The current transformer load RF of b, current protection part
1Or RF
2End is through the diode D of current rectifying and wave filtering circuit
14Or D
15And capacitor C
7-8, resistance R
35, meet the operational amplifier U of amplitude transformation circuit
8Inverting input, U
8Output to operational amplifier U
9Inverting input, U
9Output is by the voltage divider K switch
3The operational amplifier U that connects magnitude comparator
10Inverting input, U
10The output termination is carried out the relay J of holding circuit
2U
9Output is simultaneously by the voltage divider K switch
4The operation amplifier U that connects magnitude comparator
12Operational amplifier U with proportional amplifier
11In-phase input end, U
11And U
12Output connect the operational amplifier U that carries out holding circuit through the delay circuit that Resistor-Capacitor Unit constitutes
13Inverting input compares, U
13Output is to relay J
3
The operational amplifier U of short circuit identification circuit in c, the monitor protection part
14Operational amplifier U with the identification circuit that opens circuit
15In-phase input end all links to each other with monitoring cable, U
14And U
15Output all meet the operational amplifier U of OR circuit
16In-phase input end, U
16The delay circuit that output constitutes by Resistor-Capacitor Unit is to the operational amplifier U that carries out holding circuit
17Inverting input, U
17Output connects relay J
4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222317 CN2106432U (en) | 1991-10-14 | 1991-10-14 | High voltage combined protection relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91222317 CN2106432U (en) | 1991-10-14 | 1991-10-14 | High voltage combined protection relay device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2106432U true CN2106432U (en) | 1992-06-03 |
Family
ID=4929199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91222317 Granted CN2106432U (en) | 1991-10-14 | 1991-10-14 | High voltage combined protection relay device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2106432U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393492A (en) * | 2011-07-05 | 2012-03-28 | 中北大学 | Full-automatic mining comprehensive protector testing system |
| CN102623954A (en) * | 2011-12-31 | 2012-08-01 | 浙江路美思电气有限公司 | Intelligently controlled protector |
| CN112798903A (en) * | 2020-12-30 | 2021-05-14 | 西安西驰电气股份有限公司 | Double-shielded cable fault detection method |
-
1991
- 1991-10-14 CN CN 91222317 patent/CN2106432U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393492A (en) * | 2011-07-05 | 2012-03-28 | 中北大学 | Full-automatic mining comprehensive protector testing system |
| CN102393492B (en) * | 2011-07-05 | 2014-04-16 | 中北大学 | Full-automatic mining comprehensive protector testing system |
| CN102623954A (en) * | 2011-12-31 | 2012-08-01 | 浙江路美思电气有限公司 | Intelligently controlled protector |
| CN112798903A (en) * | 2020-12-30 | 2021-05-14 | 西安西驰电气股份有限公司 | Double-shielded cable fault detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |