CN103235255A - Time-current characteristic test method for multiple miniature circuit breakers - Google Patents
Time-current characteristic test method for multiple miniature circuit breakers Download PDFInfo
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- CN103235255A CN103235255A CN2013101044464A CN201310104446A CN103235255A CN 103235255 A CN103235255 A CN 103235255A CN 2013101044464 A CN2013101044464 A CN 2013101044464A CN 201310104446 A CN201310104446 A CN 201310104446A CN 103235255 A CN103235255 A CN 103235255A
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Abstract
The invention discloses a time-current characteristic test method for multiple miniature circuit breakers. The test method includes 1), connecting heads and tails of poles of the miniature circuit breakers with the same rated currents through wires; 2), providing 1.13 times rated current to the miniature circuit breakers with the poles in tandem connection through a voltage regulator and a current transformer and keeping the miniature circuit breakers not being tripped in a set time; 3), raising the current stably to 1.45 times rated current and observing conditions of the miniature circuit breakers in a set time, taking the tripped miniature circuit breaker from the miniature circuit breakers in tandem connection and keeping the rest miniature circuit breakers with the poles being connected from heads to tails when one of the miniature circuit breakers is tripped; and 4), continuing to test until the set time is up and the test is finished. Single-phase and three-phase miniature circuit breakers with the same rated currents from different manufacture factories are put together and are tested simultaneously by the test method, so that operation is facilitated, both time and labor are saved, and working efficiency is improved.
Description
Technical field
The present invention relates to a kind of time-current characteristic testing method of miniature circuit breaker, particularly a kind of time-current characteristic testing method that is connected in series many miniature circuit breakers.
Background technology
Miniature circuit breaker is most popular a kind of terminal protection electrical equipment during architectural electricity terminal power distribution equipment draws; the tripping characteristic test of miniature circuit breaker is an important tests project weighing its characteristic quality; table 7 and 8.6.2.1 according to GB 10963.1-2005/IEC 60898-1:2002 " overcurrent protection isolating switch first of electric attachments family expenses and similar site: the isolating switch that is used for interchange " 8.6.1; the designated time of the time-current characteristic test determination in this pilot project is 1 hour (rated current is smaller or equal to the miniature circuit breaker of 63 peaces) or 2 hours (rated current is greater than the miniature circuit breaker of 63 peaces), and the following stated designated time is this time.Because the censorship producer and the miniature circuit breaker quantity that relate to are many, detecting one by one needs to consume a large amount of time and efforts of testing staff, uneconomical and inefficiency.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of time-current characteristic test method of easy to operate, time saving and energy saving miniature circuit breaker, they can be with different manufacturers, single, the three-phase miniature isolating switch of same nominal electric current are serially connected and test, under the condition that does not influence test findings, save test period greatly, improved work efficiency.
The technical solution used in the present invention is: a kind of time-current characteristic testing method of a plurality of miniature circuit breakers may further comprise the steps:
1) all utmost points of a plurality of miniature circuit breakers that rated current is identical connect from beginning to end with lead;
2) a plurality of miniature circuit breakers that utilize the pressure regulator summation current transformer to be serially connected for all utmost points provide 1.13 times of rated current, do not thread off in the designated time, and the Current Transformer Secondary terminal links to each other with multimeter;
3) with current stabilization rise to 1.45 times of rated current, in the time of agreement, observe the state of miniature circuit breaker; When certain miniature circuit breaker is threaded off, this dropout miniature circuit breaker is taken out from a plurality of miniature circuit breakers of serial connection, guarantee that still all utmost point endings of remaining miniature circuit breaker link to each other;
4) continuing test, repeat the 3rd) experiment finishes step until the designated time, and the miniature circuit breaker of threading off in the designated time belongs to specification product, and the miniature circuit breaker of not threading off in the designated time belongs to substandard product.
Described miniature circuit breaker can be a plurality of single-phase, a plurality of three-phases or the existing single-phase a plurality of miniature circuit breakers that have three-phase to mix again.
Described pressure regulator rated capacity is that 5kVA can be with current boost to required value when guaranteeing a plurality of miniature circuit breakers test of serial connection.
The beneficial effect that adopts technique scheme to produce is: all utmost points of a plurality of miniature circuit breakers that rated current is identical connect from beginning to end with lead, the a plurality of miniature circuit breakers that utilize the pressure regulator summation current transformer to be serially connected for all utmost points provide electric current, simultaneously with the current value of the real-time monitoring circuit of multimeter, when being zero, the multimeter indicating value represents certain miniature circuit breaker dropout, this dropout miniature circuit breaker is taken out from a plurality of miniature circuit breakers of serial connection, still remaining all utmost points of miniature circuit breaker of assurance finish up to link to each other and continue to test to the designated time, can carry out experimental test to a plurality of miniature circuit breakers simultaneously like this, shorten detection time greatly, improved work efficiency.
Embodiment
Concrete steps of the present invention are as follows:
1) selecting sectional area of wire is 25mm
All utmost points of copper conductor a plurality of miniature circuit breakers that rated current is identical connect from beginning to end with lead, the miniature circuit breaker here can be a plurality of single-phase, a plurality of three-phases or the existing single-phase a plurality of miniature circuit breakers that have three-phase to mix again, and the selection sectional area is 25mm
The copper conductor warranty test in can pass to the current value of testing requirements.
2) according to the requirement of GB 10963.1-2005/IEC 60898-1:2002 " electric attachments family expenses and similar site are with overcurrent protection isolating switch first: be used for the isolating switch that exchanges " 9.10.1 time-current characteristics test determination; the a plurality of miniature circuit breakers that utilize the pressure regulator summation current transformer to be serially connected for all utmost points provide 1.13 times of rated current, do not thread off in the designated time.The pressure regulator rated capacity is that 5kVA can be with current boost to required value when guaranteeing a plurality of miniature circuit breakers test of serial connection, the Current Transformer Secondary terminal links to each other with multimeter, consider namely to know the miniature circuit breaker loop current value by supervision multimeter current value behind the current transformer ratio, do not thread off in the designated time.Designated time herein refers to: rated current is smaller or equal to the miniature circuit breaker of 63 peaces, and the time is 1 hour, and rated current is greater than the miniature circuit breaker of 63 peaces, and the time is 2 hours.
3) in 5 times in second with current stabilization rise to 1.45 times of rated current, in the time of agreement, observe the state of miniature circuit breaker, when being zero, the multimeter indicating value represents certain miniature circuit breaker dropout, this dropout miniature circuit breaker is taken out from a plurality of miniature circuit breakers of serial connection, guarantee that still all utmost point endings of remaining miniature circuit breaker link to each other.Designated time herein refers to: rated current is smaller or equal to the miniature circuit breaker of 63 peaces, and the time is 1 hour, and rated current is greater than the miniature circuit breaker of 63 peaces, and the time is 2 hours.
4) continuing test, repeat 3) experiment finishes until the designated time, and the miniature circuit breaker of threading off in the designated time belongs to specification product, and the miniature circuit breaker of not threading off in the designated time belongs to substandard product.
The time-current characteristic testing method of the many miniature circuit breakers of serial connection disclosed in this invention is introduced in the miniature circuit breaker test experience, by the test analysis of this method, can be saved the time and efforts of testing crew greatly, improved work efficiency.
Claims (2)
1. the time-current characteristic testing method of a plurality of miniature circuit breakers, it is characterized in that: it may further comprise the steps:
1) all utmost points of a plurality of miniature circuit breakers that rated current is identical connect from beginning to end with lead;
2) a plurality of miniature circuit breakers that utilize the pressure regulator summation current transformer to be serially connected for all utmost points provide 1.13 times of rated current, do not thread off in the designated time, and the Current Transformer Secondary terminal links to each other with multimeter;
3) with current stabilization rise to 1.45 times of rated current, in the time of agreement, observe the state of miniature circuit breaker; When certain miniature circuit breaker is threaded off, this dropout miniature circuit breaker is taken out from a plurality of miniature circuit breakers of serial connection, guarantee that still all utmost point endings of remaining miniature circuit breaker link to each other;
4) continuing test, repeat the 3rd) experiment finishes step until the designated time, and the miniature circuit breaker of threading off in the designated time belongs to specification product, and the miniature circuit breaker of not threading off in the designated time belongs to substandard product.
2. the time-current characteristic testing method of a plurality of miniature circuit breakers according to claim 1, it is characterized in that: described miniature circuit breaker can be a plurality of single-phase, a plurality of three-phases or the existing single-phase a plurality of miniature circuit breakers that have three-phase to mix again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101044464A CN103235255A (en) | 2013-03-28 | 2013-03-28 | Time-current characteristic test method for multiple miniature circuit breakers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101044464A CN103235255A (en) | 2013-03-28 | 2013-03-28 | Time-current characteristic test method for multiple miniature circuit breakers |
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| CN103235255A true CN103235255A (en) | 2013-08-07 |
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| CN2013101044464A Pending CN103235255A (en) | 2013-03-28 | 2013-03-28 | Time-current characteristic test method for multiple miniature circuit breakers |
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Citations (6)
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| CN201628757U (en) * | 2010-04-10 | 2010-11-10 | 河北创科电子科技有限公司 | Ampere-second characteristic test system of DC breaker |
| CN102087338A (en) * | 2011-01-14 | 2011-06-08 | 刘湘如 | Overload characteristic test bed of intelligent circuit breaker and control method of overload characteristic test bed |
| CN102109574A (en) * | 2009-12-24 | 2011-06-29 | 浙江永光检测设备有限公司 | Test device of tripping characteristic of plastic-shell circuit breaker |
| US20120001617A1 (en) * | 2010-07-02 | 2012-01-05 | Reynolds Brett S | Apparatus for calibrated non-invasive measurement of electrical current |
| CN102944838A (en) * | 2012-12-06 | 2013-02-27 | 法泰电器（江苏）股份有限公司 | Ampere-second feature test device for direct current breaker |
| CN102967825A (en) * | 2012-10-30 | 2013-03-13 | 河北工业大学 | Automatic reliability test device for electric operating mechanism of molded case circuit breaker and control method of device |
-
2013
- 2013-03-28 CN CN2013101044464A patent/CN103235255A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109574A (en) * | 2009-12-24 | 2011-06-29 | 浙江永光检测设备有限公司 | Test device of tripping characteristic of plastic-shell circuit breaker |
| CN201628757U (en) * | 2010-04-10 | 2010-11-10 | 河北创科电子科技有限公司 | Ampere-second characteristic test system of DC breaker |
| US20120001617A1 (en) * | 2010-07-02 | 2012-01-05 | Reynolds Brett S | Apparatus for calibrated non-invasive measurement of electrical current |
| CN102087338A (en) * | 2011-01-14 | 2011-06-08 | 刘湘如 | Overload characteristic test bed of intelligent circuit breaker and control method of overload characteristic test bed |
| CN102967825A (en) * | 2012-10-30 | 2013-03-13 | 河北工业大学 | Automatic reliability test device for electric operating mechanism of molded case circuit breaker and control method of device |
| CN102944838A (en) * | 2012-12-06 | 2013-02-27 | 法泰电器（江苏）股份有限公司 | Ampere-second feature test device for direct current breaker |
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Application publication date: 20130807 |