CN203101444U - Circuit breaker instantaneous protection feature detecting current generating device - Google Patents
Circuit breaker instantaneous protection feature detecting current generating device Download PDFInfo
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- CN203101444U CN203101444U CN 201220708626 CN201220708626U CN203101444U CN 203101444 U CN203101444 U CN 203101444U CN 201220708626 CN201220708626 CN 201220708626 CN 201220708626 U CN201220708626 U CN 201220708626U CN 203101444 U CN203101444 U CN 203101444U
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- switch
- circuit breaker
- bridge rectifier
- current generating
- voltage regulator
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Abstract
The utility model discloses a circuit breaker instantaneous protection feature detecting current generating device, and relates to the field of circuit breakers. The circuit breaker instantaneous protection feature detecting current generating device comprises an automatic coupling voltage regulator, a bridge rectifier filtering circuit, a first switch, a first resistor, a capacitor, a peak value ammeter, a second switch, a second resistor, an inductor and a circuit breaker, wherein the automatic coupling voltage regulator is connected with an AC 220V power supply, the bridge rectifier filtering circuit comprises two input ends and two output ends, the two input ends of the bridge rectifier filtering circuit are connected with the automatic coupling voltage regulator TY, the two output ends of the bridge rectifier filtering circuit form a loop with the first switch, the first resistor, the peak value ammeter, the circuit breaker and the inductor, the second resistor is connected with the second switch in series and then connected to two ends of the circuit breaker and the inductor in parallel, and the capacitor is connected to two ends of the peak value ammeter, the second resistor and the second switch in parallel. The circuit breaker instantaneous protection feature detecting current generating device has the advantages of high detection precision and efficiency, good consistency, good controllability, small power consumption, small size and low cost.
Description
Technical field
The utility model relates to field of circuit breakers, particularly relates to a kind of isolating switch instantaneous protection Characteristics Detection current generating apparatus.
Background technology
Isolating switch is a kind of protection electrical equipment that is widely used in industry and the building low-voltage distribution system.The protection feature of isolating switch has delay protection characteristic, instantaneous protection characteristic and residual current protecting etc.The instantaneous protection characteristic mainly is that the short circuit of low-voltage distribution system is protected.When circuit was short-circuited, this characteristic was cut off circuit rapidly, with the safety of protection distribution system.Therefore, isolating switch must carry out the detection and the verification of temporal properties before dispatching from the factory.The detection principle of isolating switch instantaneous protection characteristic is as follows: according to the test request among the GB14048.2 (IEC60947-2);, detect and whether in official hour (0.2S), move by 8 times rated current (8Ia) and 12 times rated current (12Ia) at isolating switch.
Referring to shown in Figure 1, the traditional test current generating apparatus of isolating switch temporal properties comprises automatic coupling voltage regulator TY, isolating transformer TC, crest ammeter AP and circuit breaker Q F, regulate the input voltage of isolating transformer TC by automatic coupling voltage regulator TY, through the measuring current of a low-voltage, high-current of secondary generation, observe the peak value that reads electric current by crest ammeter AP.At present, domestic most enterprise uses this method of testing.
There is following shortcoming in above-mentioned method of testing:
(1) by manual adjustments autotransformer TY, change the input voltage of isolating transformer TC, realize the test current of the rated current (12Ia) of 8 times rated current (8Ia) and 12 times, precision and efficient are low, and consistance is poor.
Phase place was all different when (2) randomness of combined floodgate phase place caused closing a floodgate at every turn, and it is bigger to detect error.
The utility model content
The purpose of this utility model is in order to overcome the deficiency of above-mentioned background technology, a kind of isolating switch instantaneous protection Characteristics Detection current generating apparatus to be provided, and accuracy of detection and efficient are higher, consistance is better, controllability is better, power consumption is little, volume is little, cost is low.
The isolating switch instantaneous protection Characteristics Detection current generating apparatus that the utility model provides; comprise automatic coupling voltage regulator; bridge rectifier filter circuit; first switch; first resistance; electric capacity; crest ammeter; second switch; second resistance; inductance and isolating switch; automatic coupling voltage regulator links to each other with the alternating current 220V power supply; bridge rectifier filter circuit comprises two input ends and two output terminals; two input ends of bridge rectifier filter circuit link to each other with automatic coupling voltage regulator; two output terminals of bridge rectifier filter circuit and first switch; first resistance; crest ammeter; isolating switch and inductance form the loop; second resistance be connected in parallel on isolating switch after second switch is connected; the two ends of inductance, electric capacity is connected in parallel on crest ammeter; second resistance; the two ends of second switch.
Compared with prior art, advantage of the present utility model is as follows:
(1) accuracy of detection of the present utility model and efficient are higher, consistance is better, checking by experiment, and error≤5% the during measuring current of the rated current (12Ia) of 8 times rated current (8Ia) and 12 times, precision is higher than the requirement of standard＜20% far away.
(2) controllability of the present utility model is better, by the charging voltage of control capacitance, just can realize the test current of different brackets.
(3) power consumption of the present utility model is little, volume is little, cost is low, realizes going up the measuring current of kilo-ampere easily.
Description of drawings
Fig. 1 is the structural representation of the traditional test current generating apparatus of isolating switch temporal properties.
Fig. 2 is the structural representation of the utility model embodiment.
Fig. 3 is the curve synoptic diagram of rlc circuit response current.
Fig. 4 is the curve synoptic diagram of continuous alternating current.
Embodiment
Below in conjunction with drawings and the specific embodiments the utility model is described in further detail.
Referring to shown in Figure 2; the utility model embodiment provides a kind of isolating switch instantaneous protection Characteristics Detection current generating apparatus; comprise automatic coupling voltage regulator TY; bridge rectifier filter circuit; first switch S 1; first resistance R 1; capacitor C; crest ammeter AP; second switch S2; second resistance R 2; inductance L and circuit breaker Q F; automatic coupling voltage regulator TY links to each other with the alternating current 220V power supply; bridge rectifier filter circuit comprises two input ends and two output terminals; two input ends of bridge rectifier filter circuit link to each other with automatic coupling voltage regulator TY; two output terminals of bridge rectifier filter circuit and first switch S 1; first resistance R 1; crest ammeter AP; circuit breaker Q F and inductance L form the loop; second resistance R 2 be connected in parallel on circuit breaker Q F after second switch S2 connects; the two ends of inductance L, capacitor C are connected in parallel on crest ammeter AP; second resistance R 2; the two ends of second switch S2.
The principle of work of the utility model embodiment is elaborated as follows:
The input of alternating current 220V power supply, through the bridge rectifier filter circuit rectification, when first switch S, 1 closure, when second switch S2 disconnects, the capacitor C charging is after the capacitor C charging is saturated, first switch S 1 disconnects, second switch S2 closure, capacitor C forms the RLC vibration by the loop discharge that circuit breaker Q F and inductance L constitute, and produces the big electric current of sinusoidal test, the electric current that produces with RLC oscillating discharge carries out the temporal properties test as the instantaneous detection electric current of circuit breaker Q F to circuit breaker Q F.As long as the voltage at control capacitance C two ends just can be controlled measuring current exactly.By the automatic control to first switch S 1, second switch S2, testing process will be finished automatically.
The curve of rlc circuit response current is referring to shown in Figure 3, and the 1st the half-sinusoid electric current that the RLC oscillatory circuit produces is the useful electric current that excites circuit breaker Q F action, and the back then is an attenuance component, to not influence of test result.The result that this detection method is measured exchanges the equivalence of continuous sine-wave current testing result with shown in Figure 4, thereby reaches the detection effect of equivalence.
Those skilled in the art can carry out various modifications and variations to the utility model embodiment; if these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then these modifications and modification are also within protection domain of the present utility model.
The content of not describing in detail in the instructions is for well known to a person skilled in the art prior art.
Claims (1)
1. isolating switch instantaneous protection Characteristics Detection current generating apparatus; comprise automatic coupling voltage regulator; crest ammeter and isolating switch; it is characterized in that: also comprise bridge rectifier filter circuit; first switch; first resistance; electric capacity; second switch; second resistance; inductance; described automatic coupling voltage regulator links to each other with the alternating current 220V power supply; described bridge rectifier filter circuit comprises two input ends and two output terminals; two input ends of bridge rectifier filter circuit link to each other with automatic coupling voltage regulator; two output terminals of bridge rectifier filter circuit and first switch; first resistance; crest ammeter; isolating switch and inductance form the loop; second resistance be connected in parallel on isolating switch after second switch is connected; the two ends of inductance, electric capacity is connected in parallel on crest ammeter; second resistance; the two ends of second switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220708626 CN203101444U (en) | 2012-12-20 | 2012-12-20 | Circuit breaker instantaneous protection feature detecting current generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220708626 CN203101444U (en) | 2012-12-20 | 2012-12-20 | Circuit breaker instantaneous protection feature detecting current generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101444U true CN203101444U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220708626 Expired - Fee Related CN203101444U (en) | 2012-12-20 | 2012-12-20 | Circuit breaker instantaneous protection feature detecting current generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101444U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807216A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof |
-
2012
- 2012-12-20 CN CN 201220708626 patent/CN203101444U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807216A (en) * | 2014-12-29 | 2016-07-27 | 国家电网公司 | Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20171220 |