CN202013855U - Breaker with built-in low voltage side electron current transformer - Google Patents
Breaker with built-in low voltage side electron current transformer Download PDFInfo
- Publication number
- CN202013855U CN202013855U CN 201020650459 CN201020650459U CN202013855U CN 202013855 U CN202013855 U CN 202013855U CN 201020650459 CN201020650459 CN 201020650459 CN 201020650459 U CN201020650459 U CN 201020650459U CN 202013855 U CN202013855 U CN 202013855U
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Abstract
The present utility model relates to a breaker with a built-in low voltage side electron current transformer. The breaker comprises an upper outlet board, an explosion chamber, a mutual inductor chamber, a lower outlet board and an insulation pull bar connected with a cross-core bus, and the upper outlet board, the explosion chamber, the mutual inductor chamber, and the lower outlet board are arranged successively along the direction of the cross-core bus. The mutual inductor chamber is provided with a low voltage side electron current transformer inside, the electron current transformer comprises a Rogowski coil, a low power coil and an insulation supporting seat, and the Rogowski coil and the low power coil are coaxially sleeved on the cross-core bus. An insulation grounding pipe is arranged between the insulation supporting seat and the ground, and outlets of the Rogowski coil and the low power coil pass through the insulation grounding pipe and are connected with a signal processing circuit of the low voltage side and a power supply circuit of the signal processing circuit. As the Rogowski coil is free of the problem of saturation and is wide in frequency band scope, fault current can be precisely measured and the sensitivity and the reliability of a protection device can be increased. Moreover, the electron current transformer has small volume, lots of iron core materials and non ferrous metals are saved.
Description
Technical field
The utility model relates to electric field, the circuit breaker of particularly built-in low-pressure side electronic current transducer.
Background technology
In the electric power system, circuit breaker is very important a kind of equipment.Built-in current transformer is the output equipment of system power metering and relay protection signal in the circuit breaker.But easily saturated under traditional mulual inductor malfunction state, can not correctly reflect the aperiodic component in the transient process, cause protecting tripping or malfunction, certainty of measurement is low, dynamic range is little, frequency response range is narrow; And conventional current instrument transformer volume is big, and heating is big, needs a large amount of non-ferrous metals, causes the breaker chamber volume also bigger, and inconvenience is installed.
The utility model content
The purpose of this utility model provides the circuit breaker of built-in low-pressure side electronic current transducer, and the current transformer that has circuit breaker now is easily saturated, precision is low, dynamic range is little, frequency response range is narrow and problem bulky, that inconvenience is installed in order to solve.
For achieving the above object, scheme of the present utility model is: the circuit breaker of built-in low-pressure side electronic current transducer, be included in the last outlet board that sets gradually on the punching generatrix direction, arc control device, the instrument transformer chamber, following outlet board and the insulated tension pole that connects the punching bus, it is characterized in that, described instrument transformer is provided with the low-pressure side electronic current transducer in the chamber, this electronic current transducer is included in the coaxial Luo-coil that wears on the punching bus, low-power coil and an insulation supporting seat, be provided with the insulation ground pipe between insulation supporting seat and the ground, described Luo-coil passes signal processing circuit and the power circuit thereof that the insulation ground pipe is connected low-pressure side with the outlet of low-power coil.
Circuit breaker of the present utility model has adopted electronic current transducer; Luo-coil is as protecting coil, low-power coil as measuring coil; because Luo-coil does not have saturation problem; frequency band range is wide; can accurately measure fault current, improve the sensitivity and the reliability of protective device; and the electronic current transducer volume is little, has saved a large amount of core materials and non-ferrous metal.
Further, be provided with an inner core frame between described Luo-coil, low-power coil and the punching bus, described inner core frame is fixed on the described insulation supporting seat by outer the turning edge of one end, described Luo-coil and low-power coil are established in the outer pop-up that turns edge of described inner core frame, and connect described insulation ground pipe.
Also hold in the palm on outer the turning edge of described inner core frame and be provided with the urceolus frame that surrounds described two coils, this urceolus frame is threaded with an insulation upper cover plate away from the end that the inner core frame turns edge outward, and described insulation upper cover plate is provided with the centre bore that the punching bus is passed.
Described inner core frame and urceolus frame are the metallic shield tube.
Be provided with the ring shielding plate between described two coils, this ring shielding plate and inner core frame, urceolus frame matched in clearance.
Between described Luo-coil and the insulation upper cover plate, low-power coil and inner core frame be equipped with insulation spacer between turning edge outward.
Description of drawings
Fig. 1 is built-in low-pressure side electronic current transducer structure chart;
Fig. 2 is the signal processing circuit schematic diagram;
Fig. 3 is breaker structure figure of the present utility model.
Embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.
The circuit breaker of built-in low-pressure side electronic current transducer as shown in Figure 3, its inner electronic current transducer as shown in Figure 1.Circuit breaker is included in last outlet board 12, arc control device 20, instrument transformer chamber, following outlet board 13 that sets gradually on punching bus 20 directions and the insulated tension pole 40 that connects the punching bus, be provided with the low-pressure side electronic current transducer in the instrument transformer chamber, this electronic current transducer is included in the coaxial Luo-coil that wears 1 on the punching bus 20, low-power coil 2 and an insulation supporting seat 4.Be provided with an inner core frame 5 between Luo-coil 1, low-power coil 2 and the punching bus 20, inner core frame 5 is fixed on the insulation supporting seat 4 by outer the turning edge of one end, above-mentioned two coils are established in the outer pop-up that turns edge of inner core frame 5, turning edge outward cooperates with winding space on it, turn edge outward and ground between also be provided with one the insulation ground pipe 21.Also hold in the palm on outer the turning edge of inner core frame 5 and be provided with the urceolus frame 6 that surrounds two coils, this urceolus frame 6 is threaded with an insulation upper cover plate 7 away from the end that the inner core frame turns edge outward, and insulation upper cover plate 7 is provided with the centre bore that punching bus 20 is passed.Be provided with ring shielding plate 9 between two coils, this ring shielding plate 9 and inner core frame 5, urceolus frame 6 matched in clearance.Between Luo-coil 1 and the insulation upper cover plate 7, low-power coil 2 and inner core frame be equipped with insulation spacer between turning edge outward.Inner core frame 5 is the metallic shield tube with urceolus frame 6, the inner core frame turns edge outward and connects insulation ground pipe 21 and ground, the outlet of coil is passed insulation ground pipe 21 and is connected internally to the signal processing circuit 14 of low-pressure side and the external power circuit for signal processing circuit 14 power supplies, and signal processing circuit 14 is in external power supply circuit 15 is installed in a shielding box.
The metallic shield tube of the inside and outside both sides of coil can filter the magnetic field that enters coil, shielding magnetic field radially, and it is more accurate that coil-induced bus current is changed, and protection also can be improved with the precision and the reliability of measurement mechanism.Between coil, increase barricade, shielded the interference between the coil, further optimize coil magnetic field.
Claims (6)
1. the circuit breaker of built-in low-pressure side electronic current transducer, be included in the last outlet board that sets gradually on the punching generatrix direction, arc control device, the instrument transformer chamber, following outlet board and the insulated tension pole that connects the punching bus, it is characterized in that, described instrument transformer is provided with the low-pressure side electronic current transducer in the chamber, this electronic current transducer is included in the coaxial Luo-coil that wears on the punching bus, low-power coil and an insulation supporting seat, be provided with the insulation ground pipe between insulation supporting seat and the ground, described Luo-coil passes signal processing circuit and the power circuit thereof that the insulation ground pipe is connected low-pressure side with the outlet of low-power coil.
2. the circuit breaker of built-in low-pressure side electronic current transducer according to claim 1, it is characterized in that, be provided with an inner core frame between described Luo-coil, low-power coil and the punching bus, described inner core frame is fixed on the described insulation supporting seat by outer the turning edge of one end, described Luo-coil and low-power coil are established in the outer pop-up that turns edge of described inner core frame, and connect described insulation ground pipe.
3. the circuit breaker of built-in low-pressure side electronic current transducer according to claim 2, it is characterized in that, also hold in the palm on outer the turning edge of described inner core frame and be provided with the urceolus frame that surrounds described two coils, this urceolus frame is threaded with an insulation upper cover plate away from the end that the inner core frame turns edge outward, and described insulation upper cover plate is provided with the centre bore that the punching bus is passed.
4. the circuit breaker of built-in low-pressure side electronic current transducer according to claim 3 is characterized in that, described inner core frame and urceolus frame are the metallic shield tube.
5. the circuit breaker of built-in low-pressure side electronic current transducer according to claim 4 is characterized in that, is provided with the ring shielding plate between described two coils, this ring shielding plate and inner core frame, urceolus frame matched in clearance.
6. the circuit breaker of built-in low-pressure side electronic current transducer according to claim 3 is characterized in that, between described Luo-coil and the insulation upper cover plate, low-power coil and inner core frame be equipped with insulation spacer between turning edge outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020650459 CN202013855U (en) | 2010-12-09 | 2010-12-09 | Breaker with built-in low voltage side electron current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020650459 CN202013855U (en) | 2010-12-09 | 2010-12-09 | Breaker with built-in low voltage side electron current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202013855U true CN202013855U (en) | 2011-10-19 |
Family
ID=44784470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020650459 Expired - Lifetime CN202013855U (en) | 2010-12-09 | 2010-12-09 | Breaker with built-in low voltage side electron current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202013855U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034649A (en) * | 2010-12-09 | 2011-04-27 | 平高集团有限公司 | Circuit breaker embedded with low-voltage side electronic current transformer |
| CN103630723A (en) * | 2013-11-25 | 2014-03-12 | 北京航空航天大学 | Rogowski coil sensing head suitable for Rogowski coil current sensor |
-
2010
- 2010-12-09 CN CN 201020650459 patent/CN202013855U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034649A (en) * | 2010-12-09 | 2011-04-27 | 平高集团有限公司 | Circuit breaker embedded with low-voltage side electronic current transformer |
| CN102034649B (en) * | 2010-12-09 | 2013-07-17 | 平高集团有限公司 | Circuit breaker embedded with low-voltage side electronic current transformer |
| CN103630723A (en) * | 2013-11-25 | 2014-03-12 | 北京航空航天大学 | Rogowski coil sensing head suitable for Rogowski coil current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111019 |