CN201984144U - Spot differential coordination tester of portable direct current breaker - Google Patents
Spot differential coordination tester of portable direct current breaker Download PDFInfo
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- CN201984144U CN201984144U CN2011200183790U CN201120018379U CN201984144U CN 201984144 U CN201984144 U CN 201984144U CN 2011200183790 U CN2011200183790 U CN 2011200183790U CN 201120018379 U CN201120018379 U CN 201120018379U CN 201984144 U CN201984144 U CN 201984144U
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- time relay
- contactor
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- direct current
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Abstract
The utility model discloses a spot differential coordination tester of portable direct current breaker, and relates to a spot differential coordination tester of direct current breaker, comprising a power circuit, a test switch SBI, a resetting switch SBII, a time relay KT, a direct current contactor KM and a tester interface; an output end of the power circuit is serially connected with a resetting coil of the time relay KT; a normally closed contactor of the time relay KT is serially connected with a coil of a direct current contactor KM to be connected with the resetting coil of the time relay KT in parallel; two ends of normally opened contactor of the direct current contactor KM are connected with the tester interface. The tester of the utility model processes real test on the coordination of the direct current breaker on the spot, provides a tester for the coordination, conveniently regulates duration of short circuit according to the requirements of the coordination, and bears large current impact test; the tester has small volume and light weight, is convenient in wiring, and is simple in operation.
Description
Technical field
The utility model relates to a kind of power equipment pick-up unit, the on-the-spot differential cooperation detecting instrument of particularly a kind of dc circuit breaker.
Background technology
The distribution of the net of electric system DC feedback at present, adopts dc circuit breaker as protection electrical equipment.Because the superior and the subordinate's dc circuit breaker protection acting characteristic does not match; in the straight-flow system operational process; when short trouble appears in subordinate's consumer; the overstep tripping that often draws straight upper level dc circuit breaker; thereby cause the loss of power accident of other feeder line, and then cause the accident of transforming plant primary equipment such as high-voltage switch gear, transformer, capacitor etc.This type of accident takes place a lot of at home and abroad, the safe and stable operation of serious threat electrical network.Therefore, State Grid Corporation of China has stipulated to carry out the ampere-time characteristic test for new clothes and operating direct current protecting isolating switch, and guaranteed performance conforms to design, to guarantee the correctness of the differential cooperation of DC loop.
" DC power system operations specification " the 12 article of the 8th section of regulation dc fuse and the air-break of promulgation in 2005 should adopt up-to-standard product, its fuse-link or definite value should and be adjusted by the relevant regulations hierarchical arrangement, and regularly check, prevent because of its incorrect operation expansion accident; Before using, " DC power system technical supervision regulation " the 27 regulation automatic air circuit breaker should carry out characteristic and action current selective examination; Before using, " measure of prevention DC power system accident " the 11 middle regulation should carry out ampere-time characteristic and action current selective examination.So the dc circuit breaker in the system is done frequent, strict, parameter testing accurately, particularly ampere-time characteristic is done quantitative test and the interpolar compatibility test is very important.
Protecting electrical power system actuation time is differential along with being extensive use of of Microcomputer Protection, and its reliability, selectivity, correctness and rapidity are significantly improved; Therefore, need, thereby protect the differential reliable foundation that provides for dwindling by actual test operating time of protection.But for the on-the-spot differential compatibility test of dc circuit breaker, still do not have similar test apparatus and method both at home and abroad, in the past for the differential cooperation of DC interruption, the main method of estimation short-circuit current that adopts is carried out.But field practice finds that often there are bigger gap in estimation short-circuit current and actual short-circuit current, cause differential can not effectively cooperation of the superior and the subordinate's dc circuit breaker action to occur bypassing the immediate leadership, cause serious potential safety hazard.Therefore experimental technique, instrument and the method for studying novel differential cooperation have very strong realistic meaning.
Therefore need a kind of testing tool that can test the differential cooperation of dc circuit breaker of plural serial stage at the scene.
The utility model content
In view of this, technical problem to be solved in the utility model provides a kind of testing tool that can test the differential cooperation of dc circuit breaker of plural serial stage at the scene, in test, can determine factors such as the size of short-circuit current and time-delay, truly reflect on-the-spot short circuit accident according to the progression of the rated current of tested isolating switch, drop-away current, series connection.
The utility model is achieved through the following technical solutions:
The on-the-spot differential compatibility test instrument of the Portable DC isolating switch that the utility model provides, comprise power circuit, time relay KT, D.C. contactor KM and test block interface end, described power circuit output end partly is connected in series with the resetting coil of time relay KT, the normally closed interlock of described time relay KT is connected in series the resetting coil part of back and time relay KT and connects with the coiler part of D.C. contactor KM, the two ends of the normally open contact of described D.C. contactor KM are connected with the test block interface end.
Further, also include Test Switchboard SBI, described Test Switchboard SBI is serially connected between the resetting coil part of power circuit output end and time relay KT, Test Switchboard SBI also has double protection functions, occur when unusual at time relay reference time delay, can unclamp Test Switchboard SBI, circuit interrupts immediately, plays a protective role;
Further, also include reset switch SBII, the resetting coil part of described reset switch SBII and time relay KT also connects;
Further, described power circuit comprises power interface, battery main switch, protective tube and AC/DC power module, described battery main switch one end is connected with power interface, and the described battery main switch other end is connected in series with an end of protective tube, and the other end of described protective tube is connected with the AC/DC power module;
Further, described AC/DC power module is a bridge rectifier circuit;
Further, described time relay KT employing reference time delay is the split-second precision relay of 0.01s～99.99s;
Further, the coil voltage of described D.C. contactor is direct current 24V, the D.C. contactor of contact voltage 220V, electric current 1000A.
The beneficial effects of the utility model are: can the tester that the utility model provides can be at the scene cooperate the isolating switch inter-stage of the closing circuit of direct current cabinet, control loop makes real short-circuit test; The test method and the test unit of science are provided for the test that cooperates between the isolating switch field level, and can be according to the requirement of inter-stage cooperation, the convenient short circuit duration (time setting range 0.01s～99.99 s) of adjusting can stand great current impact test (200Ah accumulator outlet short-circuit current); Little, in light weight, the easy-to-connect, simple to operate of this tester volume can stand big short-circuit current rush; On-the-spot differential cooperation test and defencive function that it is exclusive; and corresponding on-the-spot test technology has been filled up the blank of domestic dependence test technology; have very strong application and promotional value, be expected to obtain the widespread use of complete producer of domestic DC current and electric system.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by following instructions and claims.
Description of drawings
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is the on-the-spot differential compatibility test instrument circuit schematic diagram of Portable DC isolating switch.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only for the utility model is described, rather than in order to limit protection domain of the present utility model.
Fig. 1 is the on-the-spot differential compatibility test instrument circuit schematic diagram of Portable DC isolating switch, as shown in the figure: the on-the-spot differential compatibility test instrument of the Portable DC isolating switch that provides of the present utility model, comprise power circuit 1, time relay KT2, D.C. contactor KM3 and test block interface end 4, described power circuit 1 output terminal partly is connected in series with the resetting coil of time relay KT2, the normally closed interlock 21 of described time relay KT2 is connected in series the resetting coil part of back and time relay KT2 and connects with the coiler part of D.C. contactor KM3, the two ends of the normally open contact 31 of described D.C. contactor KM3 are connected with test block interface end 4.
Further improvement as the foregoing description also includes Test Switchboard SBI5, and described Test Switchboard SBI5 is serially connected between the resetting coil part of power circuit 1 output terminal and time relay KT2.
Further improvement as the foregoing description also includes reset switch SBII6, and the resetting coil part of described reset switch SBII6 and time relay KT2 also connects.
Further improvement as the foregoing description, described power circuit comprises power interface 11, protective tube 12, AC/DC power module 13 and battery main switch 14, described battery main switch 14 1 ends are connected with power interface 11, described battery main switch 14 other ends are connected in series with an end of protective tube 12, and the other end of described protective tube 12 is connected with AC/DC power module 13.
As the further improvement of the foregoing description, described AC/DC power module 13 is a bridge rectifier circuit.
As the further improvement of the foregoing description, it is the split-second precision relay of 0.01s～99.99s that described time relay KT2 adopts reference time delay.
As the further improvement of the foregoing description, the coil voltage of described D.C. contactor KM3 is the D.C. contactor of 24V, contact voltage 220V, electric current 1000A.
The on-the-spot differential compatibility test instrument using method of the Portable DC isolating switch that the utility model provides:
1) switching off AC power, is extracted step-down module, step-down protector at short circuit step-down silicon chain; 2) dismantle sample line on the shunt; 3) disconnect the insurance of watch-dog working power, each sampling insurance; 4) close insulating monitoring instrument power supply, disconnection sensor common port; 5) power supply of disconnection Hall element; 6), connect the on-the-spot differential compatibility test instrument of portable beaker in the short-circuit point of selecting; 7), select the delay time of the test instrument time relay according to the isolating switch of each short dot.
The wherein selection of short dot: 1) in the load end short circuit: at the external 2.5 squares of about 20 meters leads of the control loop of feeder cabinet, be connected in series 1 3A/2P C type dc circuit breaker again, isolating switch output termination short-circuit test instrument; 2) in the feeder line output terminal short circuit of control loop; 3) at control bus terminal shortcircuit; 4) terminal shortcircuit on the female master switch of control; 5) in the short circuit of battery switch output terminal; 6) closing bus bar in like manner just when the load end short circuit, needs 1 3A/2P C type dc circuit breaker of serial connection.
6 isolating switchs have been adopted among the embodiment that the utility model provides, 1# isolating switch 71; 2# isolating switch 72;
3# isolating switch 73; 4# isolating switch 74; 5# isolating switch 75; 6# isolating switch 76; Isolating switch technical parameters at different levels are as follows:
1# isolating switch: GMB225 2428/R 200A time-delay 30ms(battery main swtich);
2# isolating switch: GMB100M 2428 100A time-delay 30ms(closing bus bar master switch);
3# isolating switch: GMB100M 2428 80A time-delay 30ms(control bus master switch);
4# isolating switch: GM5-63 50A (feed panel closes a floodgate and exports switch);
5# isolating switch: GM5-63 20A (feed panel control output switch);
6# isolating switch: GM32/1300R-C 3A (simulation continue the switch of guaranteeing).
The correlation test record:
"-" represents that this grade isolating switch has neither part nor lot in the inter-stage compatibility test in the table; The upper and lower level of " √ " expression isolating switch inter-stage can cooperate in the table, and " * " expression is mismatched with last isolating switch inter-stage inter-stage.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although by the utility model being described with reference to preferred embodiment of the present utility model, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and the spirit and scope of the present utility model that do not depart from appended claims and limited.
Claims (7)
1. the on-the-spot differential compatibility test instrument of Portable DC isolating switch, it is characterized in that: comprise power circuit (1), time relay KT (2), D.C. contactor KM (3) and test block interface end (4), described power circuit (1) output terminal partly is connected in series with the resetting coil of time relay KT (2), the normally closed interlock (21) of described time relay KT (2) is connected in series the resetting coil part of back and time relay KT (2) and connects with the coiler part of D.C. contactor KM (3), the two ends of the normally open contact (31) of described D.C. contactor KM (3) are connected with test block interface end (4).
2. the on-the-spot differential compatibility test instrument of Portable DC isolating switch according to claim 1, it is characterized in that: also include Test Switchboard SBI (5), described Test Switchboard SBI (5) is serially connected between the resetting coil part of power circuit (1) output terminal and time relay KT (2).
3. the on-the-spot differential compatibility test instrument of Portable DC isolating switch according to claim 2 is characterized in that: also include reset switch SBII (6), the resetting coil part of described reset switch SBII (6) and time relay KT (2) also connects.
4. according to claim 1, the on-the-spot differential compatibility test instrument of 2 or 3 described Portable DC isolating switchs, it is characterized in that: described power circuit comprises power interface (11), protective tube (12), AC/DC power module (13) and battery main switch (14), described battery main switch (14) one ends are connected with power interface (11), described battery main switch (14) other end is connected in series with an end of protective tube (12), and the other end of described protective tube (12) is connected with AC/DC power module (13).
5. the on-the-spot differential compatibility test instrument of Portable DC isolating switch according to claim 4, it is characterized in that: described AC/DC power module (13) is a bridge rectifier circuit.
6. the on-the-spot differential compatibility test instrument of Portable DC isolating switch according to claim 5, it is characterized in that: it is the split-second precision relay of 0.01s～99.99s that described time relay KT (2) adopts reference time delay.
7. the on-the-spot differential compatibility test instrument of Portable DC isolating switch according to claim 6, it is characterized in that: the coil voltage of described D.C. contactor KM (3) is the D.C. contactor of direct current 24V, contact voltage 220V, electric current 1000A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200183790U CN201984144U (en) | 2011-01-20 | 2011-01-20 | Spot differential coordination tester of portable direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200183790U CN201984144U (en) | 2011-01-20 | 2011-01-20 | Spot differential coordination tester of portable direct current breaker |
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| Publication Number | Publication Date |
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| CN201984144U true CN201984144U (en) | 2011-09-21 |
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| CN2011200183790U Expired - Lifetime CN201984144U (en) | 2011-01-20 | 2011-01-20 | Spot differential coordination tester of portable direct current breaker |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636683A (en) * | 2012-05-11 | 2012-08-15 | 河北省电力建设调整试验所 | Test device and method for short-circuit current of direct-current power supply system based on low-current burst power |
| CN102662118A (en) * | 2012-05-11 | 2012-09-12 | 河北省电力建设调整试验所 | Recording mode-based stage difference coordination testing method for protective electrical equipment of direct current power system |
| CN103293470A (en) * | 2012-02-27 | 2013-09-11 | 海洋王（东莞）照明科技有限公司 | Circuit for testing service life of switches |
| CN103412259A (en) * | 2013-08-28 | 2013-11-27 | 国家电网公司 | Device for testing on-off performance of direct current breaker |
| CN103424692A (en) * | 2013-08-28 | 2013-12-04 | 国家电网公司 | Direct-current circuit breaker on-off characteristic test method |
| CN104122500A (en) * | 2014-07-18 | 2014-10-29 | 国家电网公司 | Air switch stage difference coordination test device and test method |
| CN105487005A (en) * | 2015-12-04 | 2016-04-13 | 国家电网公司 | Multifunctional non-all-phase relay calibrator |
| CN108363001A (en) * | 2018-01-29 | 2018-08-03 | 温州大学 | A kind of low-voltage circuit breaker short-circuit test system and its impedance self-adaptive bearing calibration |
| CN111693854A (en) * | 2020-06-24 | 2020-09-22 | 贵州天义电器有限责任公司 | Circuit for simulating voltage drop and operation method thereof |
-
2011
- 2011-01-20 CN CN2011200183790U patent/CN201984144U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293470A (en) * | 2012-02-27 | 2013-09-11 | 海洋王（东莞）照明科技有限公司 | Circuit for testing service life of switches |
| CN103293470B (en) * | 2012-02-27 | 2016-06-22 | 海洋王（东莞）照明科技有限公司 | Test circuit for switch life |
| CN102662118B (en) * | 2012-05-11 | 2016-05-18 | 河北省电力建设调整试验所 | Based on the differential cooperation method of testing of electric power DC system protective device of record ripple mode |
| CN102636683B (en) * | 2012-05-11 | 2015-05-27 | 河北省电力建设调整试验所 | Test device and method for short-circuit current of direct-current power supply system based on low-current burst power |
| CN102636683A (en) * | 2012-05-11 | 2012-08-15 | 河北省电力建设调整试验所 | Test device and method for short-circuit current of direct-current power supply system based on low-current burst power |
| CN102662118A (en) * | 2012-05-11 | 2012-09-12 | 河北省电力建设调整试验所 | Recording mode-based stage difference coordination testing method for protective electrical equipment of direct current power system |
| CN103412259A (en) * | 2013-08-28 | 2013-11-27 | 国家电网公司 | Device for testing on-off performance of direct current breaker |
| CN103424692A (en) * | 2013-08-28 | 2013-12-04 | 国家电网公司 | Direct-current circuit breaker on-off characteristic test method |
| CN103412259B (en) * | 2013-08-28 | 2015-12-09 | 国家电网公司 | A kind of direct-current circuit breaker on-off characteristic test device |
| CN104122500A (en) * | 2014-07-18 | 2014-10-29 | 国家电网公司 | Air switch stage difference coordination test device and test method |
| CN105487005A (en) * | 2015-12-04 | 2016-04-13 | 国家电网公司 | Multifunctional non-all-phase relay calibrator |
| CN105487005B (en) * | 2015-12-04 | 2019-04-16 | 国家电网公司 | A kind of multi-functional non-three phase relay checking instrument |
| CN108363001A (en) * | 2018-01-29 | 2018-08-03 | 温州大学 | A kind of low-voltage circuit breaker short-circuit test system and its impedance self-adaptive bearing calibration |
| CN111693854A (en) * | 2020-06-24 | 2020-09-22 | 贵州天义电器有限责任公司 | Circuit for simulating voltage drop and operation method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |