CN204116435U - Combined type secondary voltage mutual-inductance apparatus - Google Patents

Combined type secondary voltage mutual-inductance apparatus Download PDF

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Publication number
CN204116435U
CN204116435U CN201420573164.9U CN201420573164U CN204116435U CN 204116435 U CN204116435 U CN 204116435U CN 201420573164 U CN201420573164 U CN 201420573164U CN 204116435 U CN204116435 U CN 204116435U
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China
Prior art keywords
voltage
low
transformer
arm
inductance
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Active
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CN201420573164.9U
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Chinese (zh)
Inventor
邓吉勇
彭韬
张广泰
罗苏南
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NR Electric Co Ltd
Changzhou NR Electric Power Electronics Co Ltd
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NR Electric Co Ltd
Changzhou NR Electric Power Electronics Co Ltd
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Priority to CN201420573164.9U priority Critical patent/CN204116435U/en
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Abstract

The utility model discloses a kind of combined type secondary voltage mutual-inductance apparatus, it comprises high-voltage arm resistance, low-voltage arm isolated voltage transformer and shielding case, high-voltage arm resistance and low-voltage arm isolated voltage transformer are all encapsulated in shielding case by insulating medium, one end of high-voltage arm resistance is an input end of voltage signal, one end of the other end of high-voltage arm resistance and the primary side of low-voltage arm isolated voltage transformer is in series, the other end of the primary side of low-voltage arm isolated voltage transformer is another input end of voltage signal, the two ends of the secondary side of low-voltage arm isolated voltage transformer are respectively two output terminals of voltage signal.The utility model can not voltage signal in real time monitoring electric system, for metering, observing and controlling and protective relaying device provide the equipment use of information of voltage, and has higher accuracy of measurement, larger dynamic range and transient characterisitics preferably.

Description

Combined type secondary voltage mutual-inductance apparatus
Technical field
The utility model relates to a kind of combined type secondary voltage mutual-inductance apparatus, for metering, observing and controlling and protective relaying device provide the equipment use of supply voltage information.
Background technology
At present, the protection supervisory equipment of electric system needs in real time the voltage signal of acquisition system accurately, in conventional substation, the secondary voltage signal of primary voltage mutual inductor is generally 57.7V, 100V etc., and in photovoltaic transformer station, secondary voltage signal in the transformer stations such as wind power station is relatively large, be generally 380V ~ 2000V, one or two electromagnetic induction principles according to routine make secondary voltage mutual inductor, then the volume of mutual inductor can be larger, cannot be installed in protection supervisory equipment, and the overload capacity of mutual inductor is also restricted, the present invention proposes a kind of new composite structure to overcome the deficiency of conventional secondary voltage mutual inductor for this reason.
Summary of the invention
Technical problem to be solved in the utility model is the defect overcoming prior art; a kind of combined type secondary voltage mutual-inductance apparatus is provided; it can not voltage signal in real time monitoring electric system; for metering, observing and controlling and protective relaying device provide the equipment use of information of voltage, and there are higher accuracy of measurement, larger dynamic range and good transient characterisitics.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of combined type secondary voltage mutual-inductance apparatus, it comprises high-voltage arm resistance, low-voltage arm isolated voltage transformer and shielding case, high-voltage arm resistance and low-voltage arm isolated voltage transformer are all encapsulated in shielding case by insulating medium, one end of high-voltage arm resistance is an input end of voltage signal, one end of the other end of high-voltage arm resistance and the primary side of low-voltage arm isolated voltage transformer is in series, the other end of the primary side of low-voltage arm isolated voltage transformer is another input end of voltage signal, the two ends of the secondary side of low-voltage arm isolated voltage transformer are respectively two output terminals of voltage signal.
Further, two input ends of described voltage signal and two output terminals are all drawn outside shielding case with capillary with fixing by signal wire.
After have employed technique scheme, the mode that the utility model adopts electric resistance partial pressure and inductance dividing potential drop to combine; The high-pressure side of dividing potential drop composite structure is electric resistance partial pressure, low-pressure side is inductance dividing potential drop, electric resistance partial pressure occupies the most of voltage in voltage, and inductance dividing potential drop occupies the smaller portions in voltage, thus the Micro-Transformer of Voltage of small volume can be adopted, effectively reduce the overall volume of mutual inductor, be easily installed in protection supervisory equipment; The low-voltage arm isolated voltage transformer that low-pressure side adopts, both dividing potential drop effect had been played, play again the effect of primary voltage and secondary voltage isolation, thus make this product have higher accuracy of measurement, larger dynamic range and good transient characterisitics, there is the features such as simple and reliable for structure, small volume, lighter in weight, the linearity are good simultaneously; Have employed shielding case, in the electromagnetic environment that the interference of lightning impulse, surge and fast transient, power frequency magnetic field interference etc. are complicated, this mutual-inductance apparatus can be good at meeting electromagnetic compatibility characteristic; This mutual-inductance apparatus can run in wide temperature range normal table, and the temperature coefficient of divider resistance is low, stable performance, and under the temperature that works long hours is-40 ° ~+70 ° situations, the accuracy of this transformer device measuring voltage is unaffected; Adopt insulating medium of good performance to encapsulate in shielding case, there is good waterproof and dampproof function.
Accompanying drawing explanation
Fig. 1 is the connection diagram of combined type secondary voltage mutual-inductance apparatus of the present utility model.
Embodiment
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail.
As shown in Figure 1, a kind of combined type secondary voltage mutual-inductance apparatus, it comprises high-voltage arm resistance 3, low-voltage arm isolated voltage transformer 4 and shielding case 1, high-voltage arm resistance 3 and low-voltage arm isolated voltage transformer 4 are all encapsulated in shielding case 1 by insulating medium 2, one end of high-voltage arm resistance 3 is an input end of voltage signal, one end of the other end of high-voltage arm resistance 3 and the primary side of low-voltage arm isolated voltage transformer 4 is in series, the other end of the primary side of low-voltage arm isolated voltage transformer 4 is another input end of voltage signal, the two ends of the secondary side of low-voltage arm isolated voltage transformer 4 are respectively two output terminals of voltage signal.
Two input ends of voltage signal and two output terminals are all drawn outside shielding case 1 with capillary with fixing by signal wire.
The manufacturing process of this combined type secondary voltage mutual-inductance apparatus is as follows:
As shown in Figure 1, high-voltage arm resistance 3 is held series welding to be connected together with low-voltage arm isolated voltage transformer 4 primary side K1 and is placed on shield in case 1;
By once end P1 and P2, the secondary terminals S1 and S2 of this mutual-inductance apparatus by signal wire with fixing draw outside shielding case 1 with capillary;
Pour in shielding case 1 from shielding case 1 bottom opening by insulating medium 2, after insulating medium 1 solidifies, high-voltage arm resistance 3, low-voltage arm isolated voltage transformer 4, capillary etc. in shielding case 1 can be fixed;
Terminals P 1 and the voltage signal U1 of P2 input for accessing input, terminal S1 and S2 is sent to protection supervisory equipment for the voltage signal U2 exported and uses.
Principle of work of the present utility model is as follows:
The mode that the utility model adopts electric resistance partial pressure and inductance dividing potential drop to combine; The high-pressure side of dividing potential drop composite structure is electric resistance partial pressure, low-pressure side is inductance dividing potential drop, electric resistance partial pressure occupies the most of voltage in voltage, and inductance dividing potential drop occupies the smaller portions in voltage, thus the Micro-Transformer of Voltage of small volume can be adopted, effectively reduce the overall volume of mutual inductor, be easily installed in protection supervisory equipment; The low-voltage arm isolated voltage transformer 4 that low-pressure side adopts, both dividing potential drop effect had been played, play again the effect of primary voltage and secondary voltage isolation, thus make this product have higher accuracy of measurement, larger dynamic range and good transient characterisitics, there is the features such as simple and reliable for structure, small volume, lighter in weight, the linearity are good simultaneously; Have employed shielding case 1, in the electromagnetic environment that the interference of lightning impulse, surge and fast transient, power frequency magnetic field interference etc. are complicated, this mutual-inductance apparatus can be good at meeting electromagnetic compatibility characteristic; This mutual-inductance apparatus can run in wide temperature range normal table, and the temperature coefficient of divider resistance is low, stable performance, and under the temperature that works long hours is-40 ° ~+70 ° situations, the accuracy of this transformer device measuring voltage is unaffected; Adopt insulating medium of good performance to encapsulate in shielding case 1, there is good waterproof and dampproof function.
Above-described specific embodiment; technical matters, technical scheme and beneficial effect that the utility model solves are further described; be 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 amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (2)

1. a combined type secondary voltage mutual-inductance apparatus, it is characterized in that: it comprises high-voltage arm resistance (3), low-voltage arm isolated voltage transformer (4) and shielding case (1), high-voltage arm resistance (3) and low-voltage arm isolated voltage transformer (4) are all encapsulated in shielding case (1) by insulating medium (2), one end of high-voltage arm resistance (3) is an input end of voltage signal, one end of the other end of high-voltage arm resistance (3) and the primary side of low-voltage arm isolated voltage transformer (4) is in series, the other end of the primary side of low-voltage arm isolated voltage transformer (4) is another input end of voltage signal, the two ends of the secondary side of low-voltage arm isolated voltage transformer (4) are respectively two output terminals of voltage signal.
2. combined type secondary voltage mutual-inductance apparatus according to claim 1, is characterized in that: two input ends of described voltage signal and two output terminals all draw shielding case (1) outward with fixing with capillary by signal wire.
CN201420573164.9U 2014-09-30 2014-09-30 Combined type secondary voltage mutual-inductance apparatus Active CN204116435U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420573164.9U CN204116435U (en) 2014-09-30 2014-09-30 Combined type secondary voltage mutual-inductance apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420573164.9U CN204116435U (en) 2014-09-30 2014-09-30 Combined type secondary voltage mutual-inductance apparatus

Publications (1)

Publication Number Publication Date
CN204116435U true CN204116435U (en) 2015-01-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110850139A (en) * 2018-08-21 2020-02-28 西安西电高压开关有限责任公司 Voltage measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110850139A (en) * 2018-08-21 2020-02-28 西安西电高压开关有限责任公司 Voltage measuring device
CN110850139B (en) * 2018-08-21 2022-02-01 西安西电高压开关有限责任公司 Voltage measuring device

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