CN203397884U - Isolation breaker electronic current transformer - Google Patents

Isolation breaker electronic current transformer Download PDF

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Publication number
CN203397884U
CN203397884U CN201320450368.9U CN201320450368U CN203397884U CN 203397884 U CN203397884 U CN 203397884U CN 201320450368 U CN201320450368 U CN 201320450368U CN 203397884 U CN203397884 U CN 203397884U
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China
Prior art keywords
optical fiber
current
transformer
current transformer
far
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Active
Application number
CN201320450368.9U
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Chinese (zh)
Inventor
张广泰
罗苏南
谢本辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou NR Electric Power Electronics Co Ltd
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Changzhou NR Electric Power Electronics Co Ltd
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Priority to CN201320450368.9U priority Critical patent/CN203397884U/en
Application granted granted Critical
Publication of CN203397884U publication Critical patent/CN203397884U/en
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Abstract

The utility model discloses an isolation breaker electronic current transformer which comprises a current transformer body, a transformer shell, a far-end electronic module, an optical fiber insulator and an optical fiber. The current transformer body is mounted in the transformer shell. The optical fiber cable is inserted into the optical fiber insulator. A signal input end of the far-end electronic module is connected with a secondary winding side of the current transformer body. A signal output end of the far-end electronic module is connected with the optical fiber cable. The isolation breaker electronic current transformer is high in electromagnetic interference resistance, substation secondary cable use is reduced, the requirements for digital substation technology development are satisfied, earth insulation performance of the transformer is guaranteed, and signal measuring accuracy is increased.

Description

Isolation circuit breakers electronic current mutual inductor
Technical field
The utility model relates to a kind of isolation circuit breakers electronic current mutual inductor, belongs to instrument transformer technical field, be mainly used in electric power system in isolation circuit breakers support the use.
Background technology
At present, along with the development of electric power system, the development of new-style electronic instrument transformer has also been proposed to new requirement.Electronic mutual inductor long-term work under adverse circumstances out of doors; must stand the test of severe electromagnetic environment; when especially isolation circuit breakers is opened disjunction; the anti-electromagnetic interference performance that improves far-end electronic module in electric power system seems particularly important; once there is communication abnormality under severe electromagnetic environment, the abnormal conditions such as abnormal of sampling, will cause the malfunction of protecting electrical power system.
Summary of the invention
Technical problem to be solved in the utility model is the defect that overcomes prior art, a kind of isolation circuit breakers electronic current mutual inductor is provided, its anti-electromagnetic interference capability is strong, reduced the use of substation secondary cable, adapted to the requirement of Automation Technology of Digitized Transformer development, guarantee instrument transformer insulation property over the ground, thereby improved the accuracy of signal measurement.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of isolation circuit breakers electronic current mutual inductor, it comprises current transformer, instrument transformer housing, far-end electronic module, optical fiber insulator and optical fiber, current transformer is arranged in instrument transformer housing, optical fiber cable interts in optical fiber insulator, the signal input part of far-end electronic module is connected with the secondary winding side of current transformer, and the signal output part of far-end electronic module is connected with optical fiber cable.
Further, described instrument transformer housing is torus structure, and in instrument transformer housing, is provided with a plurality of ring-shaped grooves, and described current transformer is arranged on ring-shaped groove.
Further, the top of described instrument transformer housing is provided with protective cover.
Further, described current transformer has the low-power iron-core coil of sensing and measuring current and the hollow coil of sensing protective current.
Adopted after technique scheme, instrument transformer housing is directly fixed to isolation circuit breakers root, current sensor is used for gathering the current signal that in isolation circuit breakers, real-time streams is crossed, far-end electronic module is used for processing the current signal that current sensor gathers, and it is sent in the monitoring and protection system of electric power system by optical fiber cable, the utlity model has the features such as simple and reliable for structure, small volume, weight are light, the linearity is good, far-end electronic module of the present utility model adopts dual redundant configuration, has guaranteed the reliability of instrument transformer; The utility model utilizes optical fiber cable to transmit signal; antijamming capability is strong; reduced substation secondary cable; adapted to the requirement of Automation Technology of Digitized Transformer development; the utility model adopts the optical fiber insulator of different electric pressures to guarantee isolation circuit breakers electric mutual inductor insulation property over the ground; in addition; current transformer adopts low-power iron-core coil sensing and measuring current; adopt hollow coil sensing protective current, can make like this current transformer there are higher accuracy of measurement, larger dynamic range and transient characterisitics preferably.
accompanying drawing explanation
Fig. 1 is the structural perspective of isolation circuit breakers electronic current mutual inductor of the present utility model.
Embodiment
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below.
As shown in Figure 1, a kind of isolation circuit breakers electronic current mutual inductor, it comprises current transformer, instrument transformer housing 1, far-end electronic module 2, optical fiber insulator 3 and optical fiber, current transformer is arranged in instrument transformer housing 1, optical fiber cable interts in optical fiber insulator 3, the signal input part of far-end electronic module 2 is connected with the secondary winding side of current transformer, and the signal output part of far-end electronic module 2 is connected with optical fiber cable.
As shown in Figure 1, instrument transformer housing 1 is torus structure, and in instrument transformer housing 1, is provided with a plurality of ring-shaped grooves, and current transformer is arranged on ring-shaped groove, so just can make a plurality of current transformers of the interior installation of instrument transformer housing 1.
For can electromagnetic compatibility and prevent that rain leakage from entering instrument transformer housing 1 inside, the top of instrument transformer housing 1 be provided with protective cover 4.
In order to make current transformer have higher accuracy of measurement, larger dynamic range and transient characterisitics preferably, current transformer has the low-power iron-core coil of sensing and measuring current and the hollow coil of sensing protective current.
Operation principle of the present utility model is as follows:
Instrument transformer housing 1 is directly fixed to isolation circuit breakers root, current sensor is used for gathering the current signal that in isolation circuit breakers, real-time streams is crossed, far-end electronic module 2 is used for processing the current signal that current sensor gathers, and it is sent in the monitoring and protection system of electric power system by optical fiber cable, the utlity model has the features such as simple and reliable for structure, small volume, weight are light, the linearity is good, far-end electronic module 2 of the present utility model adopts dual redundant configuration, has guaranteed the reliability of instrument transformer; The utility model utilizes optical fiber cable to transmit signal; antijamming capability is strong; reduced substation secondary cable; adapted to the requirement of Automation Technology of Digitized Transformer development; the utility model adopts the optical fiber insulator of different electric pressures to guarantee isolation circuit breakers electric mutual inductor insulation property over the ground; in addition; current transformer adopts low-power iron-core coil sensing and measuring current; adopt hollow coil sensing protective current, can make like this current transformer there are higher accuracy of measurement, larger dynamic range and transient characterisitics preferably.
The precision that the utility model is measured the in the situation that of wide temperature can reach electric power system in the requirement of class of accuracy, and in lightning impulse situation in the electromagnetic environment of the complexity such as High-frequency Interference, earth potential rising this instrument transformer can be good at meeting electromagnetic compatibility characteristic; The sharp pounding producing when circuit-breaker switching on-off in addition does not all have impact to the insulation of instrument transformer and precision; And be in-40 °~+ 70 ° situations in the temperature that works long hours, the accuracy of its measurement of this instrument transformer is unaffected, can normally stably operation in wide temperature range.
Manufacturing process of the present utility model is as follows:
1) current sensor is installed on to instrument transformer housing 1 inside, and fixes.
2) protective cover 4 is arranged on instrument transformer housing 1 correspondence position and shields.
3) this instrument transformer is arranged on to isolation circuit breakers root by mounting-positioning holes and is used for the through-flow state of measurement and monitoring isolation circuit breakers.
4) by optical fiber, the signal of collection is sent in the monitoring and protection system of electric power system.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims (4)

1. an isolation circuit breakers electronic current mutual inductor, it is characterized in that: it comprises current transformer, instrument transformer housing (1), far-end electronic module (2), optical fiber insulator (3) and optical fiber, current transformer is arranged in instrument transformer housing (1), optical fiber cable interts in optical fiber insulator (3), the signal input part of far-end electronic module (2) is connected with the secondary winding side of current transformer, and the signal output part of far-end electronic module (2) is connected with optical fiber cable.
2. isolation circuit breakers electronic current mutual inductor according to claim 1, it is characterized in that: described instrument transformer housing (1) is torus structure, and instrument transformer housing is provided with a plurality of ring-shaped grooves in (1), and described current transformer is arranged on ring-shaped groove.
3. isolation circuit breakers electronic current mutual inductor according to claim 1 and 2, is characterized in that: the top of described instrument transformer housing (1) is provided with protective cover (4).
4. isolation circuit breakers electronic current mutual inductor according to claim 1 and 2, is characterized in that: described current transformer has the low-power iron-core coil of sensing and measuring current and the hollow coil of sensing protective current.
CN201320450368.9U 2013-07-26 2013-07-26 Isolation breaker electronic current transformer Active CN203397884U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320450368.9U CN203397884U (en) 2013-07-26 2013-07-26 Isolation breaker electronic current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320450368.9U CN203397884U (en) 2013-07-26 2013-07-26 Isolation breaker electronic current transformer

Publications (1)

Publication Number Publication Date
CN203397884U true CN203397884U (en) 2014-01-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320450368.9U Active CN203397884U (en) 2013-07-26 2013-07-26 Isolation breaker electronic current transformer

Country Status (1)

Country Link
CN (1) CN203397884U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346007A (en) * 2013-07-26 2013-10-09 常州博瑞电力自动化设备有限公司 Electronic current transformer of isolation circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346007A (en) * 2013-07-26 2013-10-09 常州博瑞电力自动化设备有限公司 Electronic current transformer of isolation circuit breaker

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