CN203811702U - Circuit and instrument for testing outlet protection loop of relay protection device - Google Patents
Circuit and instrument for testing outlet protection loop of relay protection device Download PDFInfo
- Publication number
- CN203811702U CN203811702U CN201420057121.5U CN201420057121U CN203811702U CN 203811702 U CN203811702 U CN 203811702U CN 201420057121 U CN201420057121 U CN 201420057121U CN 203811702 U CN203811702 U CN 203811702U
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- relay
- protection
- outlet loop
- testing circuit
- latch
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Abstract
The utility model discloses a circuit and an instrument for testing an outlet protection loop of a relay protection device. A coil of a self-holding relay, an indicator light and a normally-open contact of the self-holding relay are connected in series and form a branch, two ends of which are connected to the anode and the cathode of a power supply. Two ends of the normally-open contact of the self-holding relay are connected in parallel with switch nodes of an outlet protection loop of a relay protection device. The testing circuit further includes a time relay, a starting signal terminal of which is connected to a signal generator which starts to output a digital signal of an analog fault, and a reset terminal of the time relay is connected to the normally-open contact of the self-holding relay. Simply through observation of the lighting status of the indicator light, the testing circuit can determine if the outlet protection loop acts correctly and automatically detect the action time, which is simple and convenient.
Description
Technical field
The utility model relates to a kind of relay protection protection outlet loop testing circuit and instrument.
Background technology
The development of electric system and safe and stable operation have brought huge power and benefit to national economy and social development.But domestic and foreign experience shows, once nature or man-made fault occur large-scale power system, can not timely and effectively control, and will lose stable operation, makes electric network from collapsing, will lead to large-area power-cuts, to the consequence of bringing on a disaster property of society.Therefore, since there is electric system, how to ensure its safe and stable operation, just become an eternal theme.All work about electric power persons, take various measures technology, management by every possible means, make every effort to avoid grid stability destroyed and disintegrate, and prevent large area blackout.Wherein, relay protection (comprising automatic safety device) is exactly basic, most important, the most effective technological means that ensures power equipment safety and prevent and limit the long-time large-area power-cuts of electric system.Therefore how effectively to improve relay protection personnel work efficiency and reduce the protective relaying maloperation work that human error causes, ensure power network safety operation, become a large technical barrier.
Therefore; before every cover relay protection formally puts into operation; need check protective relaying device comprehensively; comprising the test in defencive function logic, current-voltage sampling loop, protection outlet loop, input and output loop; and the correctness of protection outlet loop will directly affect after relay protection action, can correctly excise reliably fault and play vital effect.The method of traditional test to protection outlet loop; from signal generator, to be sent the digital quantity signal of simulated failure amount by technician to relay protection input end; the conducting that manually detects protection outlet loop with multimeter more whether; judge by observing the conduction value of conducting shelves of multimeter whether correct protection outlet loop moves; workload is very huge and loaded down with trivial details, as easy as rolling off a logly causes artificial mistake.In addition, lack the special instrument that protection outlet loop is detected actuation time, be difficult to judge to protect whether meet actuation time of outlet loop correlation technique specification.
Utility model content
The purpose of this utility model is to provide a kind of relay protection protection outlet loop testing circuit and instrument, with the quick and easy detection that realizes relay protection protection outlet loop.
A kind of relay protection protection outlet loop testing circuit described in the utility model; the positive and negative electrode of two ends access power supply after formation one branch road after the normally opened contact series connection of coil, pilot lamp and the latch-in relay of latch-in relay; the two ends of the normally opened contact of latch-in relay connect the switching node of relay protection protection outlet loop, in parallel with the switching node of relay protection protection outlet loop.
A kind of relay protection protection outlet loop testing circuit described in the utility model, in the time that relay protection protection outlet loop switching node is closed, because the normally opened contact of latch-in relay is in parallel with relay protection protection outlet loop, so the normally opened contact two ends of latch-in relay are equivalent to short circuit, the closed energising of testing circuit, the coil electricity of the luminous while latch-in relay of pilot lamp, after the coil electricity of latch-in relay, produce galvanomagnetic effect, the normally opened contact closure of latch-in relay, even if relay protection protection outlet loop disconnected every a period of time, relay protection protection outlet loop testing circuit is under the effect of latch-in relay, normally opened contact is still closed, relay protection protection outlet loop testing circuit is still in closed "on" position, pilot lamp is still luminous, technician just can know whether relay protection protection outlet loop moves correctly as long as whether viewing lamp is luminous, simple and convenient, change the way in the past needing with multimeter manual test, greatly increase work efficiency.
Preferably; this relay protection protection outlet loop testing circuit also comprises the time relay; the initiating signal end of the time relay connects the digital quantity signal that signal generator simulated failure amount starts output, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.
By increasing the time relay, the digital quantity signal that the initiating signal end of the time relay is connected to signal generator simulated failure amount starts output, the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.In the time that signal generator sends the digital quantity signal of simulated failure amount, the initiating signal end of the time relay can synchronously receive digital quantity signal, and the time relay starts to start timing; When the normally opened contact closure of latch-in relay in relay protection protection outlet loop testing circuit; be that relay protection protection outlet loop moves; the reset terminal of the time relay receives the electric signal being sended over by relay protection protection outlet loop testing circuit; the time relay stops timing, can draw the actuation time of relay protection protection outlet loop.
Preferably, between pilot lamp and relay protection protection outlet loop, be also in series with normally closed switch.By be in series with normally closed switch between pilot lamp and the normally opened contact of latch-in relay; in the time of the closed "on" position of relay protection protection outlet loop testing circuit; pilot lamp is luminous; technician has observed the luminous situation of pilot lamp; after judging that whether protection outlet loop is correct; can be by pressing disconnection normally closed switch; relay protection protection outlet loop testing circuit is in off-state; coil no power; normally opened contact recovers off-state; realize and resetting, thereby technician can carry out next group test.By normally closed switch being set in relay protection protection outlet loop testing circuit, technician can carry out many group tests fast, improves testing efficiency.
A kind of relay protection protection outlet loop detecting instrument described in the utility model; comprise the AC/DC power module of AC power leading-in end and AC-DC conversion, the output terminal more than one above-mentioned relay protection protection outlet loop testing circuit in parallel of AC/DC power module.
Above-mentioned relay protection protection outlet loop detecting instrument; when use; the two ends of the normally opened contact of the latch-in relay of each relay protection protection outlet loop testing circuit are connected respectively to the switching node of each relay protection protection outlet loop, the switching node parallel connection of Yu Ge road relay protection protection outlet loop.In the time that a certain relay protection protection outlet loop is closed; pilot lamp corresponding on detecting instrument can be luminous; and keep luminous by latch-in relay, whether technician observes on detecting instrument pilot lamp situation and just can predict intuitively relay protection protection outlet loop and move correctly.Described instrument can have been realized the detection of the each outlet loop of relay protection very convenient, intuitively.
Brief description of the drawings
Fig. 1 is the utility model relay protection protection outlet loop testing circuit figure.
Fig. 2 is the structural drawing of the utility model relay protection protection outlet loop testing circuit with normally closed switch.
Fig. 3 is the utility model time relay circuit structural drawing.
Fig. 4 is the utility model relay protection protection outlet loop detecting instrument structural representation.
Embodiment
As Fig. 1; a kind of relay protection protection outlet loop testing circuit; the positive and negative electrode of two ends access power supply 1 after formation one branch road after normally opened contact 5 series connection of coil 2, pilot lamp 3 and the latch-in relay of its latch-in relay; the two ends of the normally opened contact 5 of latch-in relay connect the switching node 7 of relay protection protection outlet loop, in parallel with the switching node of relay protection protection outlet loop.
In the time that relay protection sends control signals to protection outlet loop; whether pilot lamp can move correctly by the switching node of whether luminous indicating relay protective device protection outlet loop, thereby realizes the detection to relay protection protection outlet loop.Its testing process is simple, directly perceived.
Relay protection protection outlet loop testing circuit also can comprise the time relay 6; as shown in Figure 2,3; the initiating signal end of the time relay 6 connects the digital quantity signal that signal generator simulated failure amount starts output, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.By setup times relay, can record simulated failure signal and send to the mistiming between switching node action, thereby realize easily the detection of the actuation time of relay protection protection outlet loop.
In addition, as shown in Figure 2, between pilot lamp and the normally opened contact of latch-in relay, be also in series with normally closed switch 4.After detection, by disconnecting normally closed switch, can realize the reset of testing circuit.Normally closed switch is taking button as good, easy to operate.
As shown in Figure 4; a kind of relay protection protection outlet loop detecting instrument; comprise the AC/DC power module of AC power leading-in end and AC-DC conversion; AC/DC power module is that voltage is the direct current of 12V by alternating current 220V voltage transition, the in parallel more than one relay protection protection of the output terminal outlet loop testing circuit of AC/DC power module.Relay protection protection outlet loop testing circuit in detecting instrument can protect the quantity of outlet loop to arrange according to relay protection, to can realize the detection in all outlet ports loop after a detecting instrument one-step installation.
Claims (4)
1. a relay protection protection outlet loop testing circuit; it is characterized in that: the positive and negative electrode of two ends access power supply after formation one branch road after the normally opened contact series connection of coil, pilot lamp and the latch-in relay of latch-in relay; the two ends of the normally opened contact of latch-in relay connect the switching node of relay protection protection outlet loop, in parallel with the switching node of relay protection protection outlet loop.
2. a kind of relay protection protection outlet loop testing circuit according to claim 1; it is characterized in that: relay protection protection outlet loop testing circuit also comprises the time relay; the initiating signal end of the time relay connects the digital quantity signal that signal generator simulated failure amount starts output, and the reset terminal of the time relay is connected with the normally opened contact of latch-in relay.
3. a kind of relay protection protection outlet loop testing circuit according to claim 1 and 2, is characterized in that: between pilot lamp and relay protection protection outlet loop, be also in series with normally closed switch.
4. a relay protection protection outlet loop detecting instrument; it is characterized in that: this instrument comprises the AC/DC power module of AC power leading-in end and AC-DC conversion the arbitrary described relay protection protection of output terminal more than one the claim 1-3 in parallel outlet loop testing circuit of AC/DC power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420057121.5U CN203811702U (en) | 2014-01-29 | 2014-01-29 | Circuit and instrument for testing outlet protection loop of relay protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420057121.5U CN203811702U (en) | 2014-01-29 | 2014-01-29 | Circuit and instrument for testing outlet protection loop of relay protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811702U true CN203811702U (en) | 2014-09-03 |
Family
ID=51450435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420057121.5U Expired - Fee Related CN203811702U (en) | 2014-01-29 | 2014-01-29 | Circuit and instrument for testing outlet protection loop of relay protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792451A (en) * | 2014-01-29 | 2014-05-14 | 中国能源建设集团广东火电工程总公司 | Detection circuit and instrument for relay protective device protective outlet loop |
-
2014
- 2014-01-29 CN CN201420057121.5U patent/CN203811702U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792451A (en) * | 2014-01-29 | 2014-05-14 | 中国能源建设集团广东火电工程总公司 | Detection circuit and instrument for relay protective device protective outlet loop |
| CN103792451B (en) * | 2014-01-29 | 2016-09-28 | 中国能源建设集团广东火电工程总公司 | A kind of relay protection protection exit loop detection circuit and instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20190129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |