CN201156072Y - Multi-doubling inductive voltage durability test apparatus - Google Patents

Multi-doubling inductive voltage durability test apparatus Download PDF

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Publication number
CN201156072Y
CN201156072Y CNU2008200556506U CN200820055650U CN201156072Y CN 201156072 Y CN201156072 Y CN 201156072Y CN U2008200556506 U CNU2008200556506 U CN U2008200556506U CN 200820055650 U CN200820055650 U CN 200820055650U CN 201156072 Y CN201156072 Y CN 201156072Y
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CN
China
Prior art keywords
module
voltage
control module
signal
testing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2008200556506U
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Chinese (zh)
Inventor
李炯
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.)
SHANGHAI SCEEC ELECTRIC EQUIPMENT CO Ltd
Original Assignee
SHANGHAI SCEEC ELECTRIC EQUIPMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by SHANGHAI SCEEC ELECTRIC EQUIPMENT CO Ltd filed Critical SHANGHAI SCEEC ELECTRIC EQUIPMENT CO Ltd
Priority to CNU2008200556506U priority Critical patent/CN201156072Y/en
Application granted granted Critical
Publication of CN201156072Y publication Critical patent/CN201156072Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a multiple frequency sensing voltage endurance tester, comprising a control module which is used for controlling the tester to collect voltage and current signal and performing comparison and analysis, a storage module which is used for storing the collected signal data, a signal collecting module which is used for collecting voltage and current signal, a display module and a triple frequency generating module. The signal collecting module, the storage module, the display module and the triple frequency generating module are respectively connected with the control module. Through adopting the triple frequency generating module to replace the current transformer and the voltage regulator, the tester has the advantages of small volume and light weight and can output 220V power supply voltage and sine wave with frequency modulation and amplitude modulation so as to facilitate field carrying and work. An equipped voltage divider can avoid capacitance-rising effect under different multiple frequency, accurately supervise the voltage of an mutual inductor and also is provided with the function of overvoltage and overcurrent protection in order to ensure safety of personnel and equipment. Except for voltage endurance function under triple frequency, the tester is also provided with the function of measuring the exciting characteristic and the no-load current so as to realize the functions of the utility model.

Description

Multiple frequence induction pressure resistant testing device
Technical field
The utility model relates to a kind of pressure resistant testing device, particularly a kind of multiple frequence induction pressure resistant testing device that is used for voltage transformer (VT) is responded to voltage-withstand test.
Background technology
Voltage transformer (VT) (PT) is the key equipment in the electric system, if there is insulation defect in voltage transformer (VT), as circle, layer short circuit, phenomenons such as support discharge and iron core punching screw suspension discharge can have a strong impact on the normal operation of power equipment, even very dangerous explosion phenomenon can take place; So need respond to voltage-withstand test to voltage transformer (VT) (PT), help the staff in time to pinpoint the problems, avoid causing more serious consequence.
At present, ac voltage withstanding test to voltage transformer (VT) all is to adopt conventional method, this method is applicable to the test of major insulation between all insulation voltage transformer (VT) winding, tandem formula or graded insulation formula voltage transformer (VT) are because it is semi-insulating tandem formula structure, winding first and last terminal voltage grade difference, just can't use conventional method to test during on-the-spot test, winding turns, interlayer minor insulation also can't be subjected to the test of voltage-withstand test simultaneously.
Because magnetic circuit can be saturated under the power frequency high voltage for the iron core in the voltage transformer (VT), cause the iron core heating, generally adopt at present the frequency tripling power supply to pressurize, induce the voltage that reaches the test voltage value accordingly, be used for voltage-withstand test voltage transformer (VT) at its primary side at the secondary side of voltage transformer (VT).Existing this frequency tripling inductive method realizes by the combination of transformer and pressure regulator, but shortcoming such as existing frequency tripling inductive method also exists work efficiency not high, and output is unstable, and measuring accuracy is not high, and repeatability is bad.
The utility model content
The purpose of this utility model is to provide a kind of multiple frequence induction pressure resistant testing device, utilization digital waveform synthetic technology and modern power electronics technology manufacture and design, than traditional frequency tripling generator high efficiency, output voltage stabilization, the measuring accuracy height, good reproducibility.
The technical matters that the utility model solved can realize by the following technical solutions:
A kind of multiple frequence induction pressure resistant testing device, it is characterized in that it comprises control device collection voltage and current signal and the control module that compares, the memory module that is used for the storage signal image data, the signal acquisition module that is used to gather voltage and current signal, display module and frequency tripling generation module; Described signal acquisition module, memory module, display module and frequency tripling generation module are connected with control module respectively.
Be connected by latch between described control module and the memory module, be convenient to described control module and control described memory module.
Whether normally described control module is connected with and is used to detect control module voltage voltage detecting reseting module.
Include the amplifying circuit that is used to measure electric current, voltage signal and electric current, voltage signal amplification is input to control module in the described acquisition module.
Described display module is a LCD MODULE backlight.
Multiple frequence induction pressure resistant testing device of the present utility model has following characteristics:
A tractor serves several purposes: instrument can be used for the voltage transformer (VT) induced over voltage withstand test, can also be used for no-load current and volt-ampere characteristic test, a tractor serves several purposes.
Automatically simple: wiring is simple, and pressurization can divide full-automatic pressurization and manual pressure, can select 40Hz to the output of 200Hz frequency range constant voltage, and the test duration is provided with automatically, but also manual adjustments.
Protection: instrument has multinomial defencive functions such as over-voltage and over-current excess temperature.The over-voltage over-current protection point can be set by the user.
Real-time clock: can write down the date and time of measuring, and on display screen, show current system time.
Print: instrument is printed measurement result in order to inquiry with mini-printer in Chinese mode.
Anti-seismic performance: instrument adopts unique seismic design, can bear in the long-distance transport sharp pounding and jolt and can not damage.
Show: adopt backlight type blue screen LCD, clear display.Complete Chinese operation interface, operation indicating is simple and clear.
Multiple frequence induction pressure resistant testing device of the present utility model; by adopting frequency tripling generation module to replace existing transformer and pressure regulator; volume is little; in light weight; input supply voltage 220V; the sine wave of output Frequency Adjustable amplitude modulation is convenient to the scene and is carried and work; be equipped with voltage divider and can prevent under the condition of multiple frequency multiplication that appearance from rising effect; monitor exactly mutual inductor once voltage and also have the safety that over-voltage over-current protection is guaranteed personnel and equipment; except beating withstand voltage function, frequency tripling also increased the measurement function of excitation property and no-load current; realize one-machine-multi-function, realize the purpose of this utility model.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of multiple frequence induction pressure resistant testing device, it comprises control module 1, memory module 2, signal acquisition module 3, display module 4 and frequency tripling generation module; Signal acquisition module 3 is gathered voltage, current signal from the voltage transformer (VT) summation current transformer respectively, by signal acquisition module 3 signal is amplified, be transferred in the control module 1, compare by control module 1, outputing to display module 4 respectively shows, perhaps output to memory module 2 storage, the data after memory module 2 is used for the storage signal image data or storage control module 1 is handled.
As shown in Figure 2, control module 1 connects memory module 2 by latch 5, and control module 1 connects display module 4 by connector P1, and whether normally control module 1 is connected with and is used to detect control module 1 voltage voltage detecting reseting module 11.
Control module 1 can connect voltage divider by connector P1, prevents to hold under the condition of multiple frequency multiplication to rise effect, monitor exactly mutual inductor once voltage and also have the safety that over-voltage over-current protection is guaranteed personnel and equipment.
Signal acquisition module 3 comprises the circuit that voltage transformer pt, current transformer CT, amplifier U111, operational amplifier U112 and resistance, electric capacity, inductance and diode are formed; 2,4 pin of connector P2 are connected to each other on 1 pin that inserts the voltage transformer pt primary side, 1 of connector P2 wears 3 pin of excess current mutual inductor CT and connector P2, inserts on 2 pin of voltage transformer pt primary side by resistance R 121, R123, R120 successively then; 3 pin of the secondary side of voltage transformer pt connect resistance R 119 respectively, capacitor C 119, resistance R 115,4 pin of the secondary side of voltage transformer pt connect resistance R 113 respectively, the other end of resistance R 119, capacitor C 121, C115, C114, the other end of capacitor C 119,2 pin of contact Port4 summation current transformer CT input end, the other end ground connection of capacitor C 121,1 pin of current transformer CT input end connects the other end and the resistance R 114 of resistance R 113 respectively, the other end of resistance R 114 is connected the negative pole that connects voltage stabilizing diode Z101 then respectively and 3 pin of amplifier U111, the plus earth of voltage stabilizing diode Z101 with the other end of capacitor C 114; Resistance R 115 is connected the negative pole that connects voltage stabilizing diode Z102 then respectively and 5 pin of amplifier U111, the plus earth of voltage stabilizing diode Z102 with the other end of capacitor C 115; The 4 pin ground connection of amplifier U111,2 pin connect 1 pin of amplifier U111 by resistance R 118, connect contact Port3 and capacitor C 111 successively by resistance R 109 then, the other end ground connection of capacitor C 111,6 pin of amplifier U111 are connected with 7 pin of amplifier U111 by resistance R 111, connect contact Port2 and capacitor C 110 successively by resistance R 110 then, the other end ground connection of capacitor C 110; 8 pin of amplifier U111 connect inductance L 101 respectively, capacitor C 116, C103,4 pin of power supply AVCC and operational amplifier U112, another termination power DVCC of inductance L 101, the other end of capacitor C 116 and capacitor C 103 is connected to each other after the ground connection 2 pin and the resistance R 116 of concatenation operation amplifier U112 respectively, the other end of resistance R 116 connects 3 pin of potentiometer W101 and operational amplifier U112 respectively, the other end of potentiometer W101 connects ground connection Port4 and capacitor C 117 respectively by resistance R 112, the other end ground connection of capacitor C 117,5 pin contact Port4 of operational amplifier.Signal acquisition module 3 is transferred to control module 1 by contact with the signal that collects.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (6)

1, a kind of multiple frequence induction pressure resistant testing device, it is characterized in that it comprises control device collection voltage and current signal and the control module that compares, the memory module that is used for the storage signal image data, the signal acquisition module that is used to gather voltage and current signal, display module and frequency tripling generation module; Described signal acquisition module, memory module, display module and frequency tripling generation module are connected with control module respectively.
2, multiple frequence as claimed in claim 1 induction pressure resistant testing device is characterized in that: be connected by latch between described control module and the memory module.
3, multiple frequence induction pressure resistant testing device as claimed in claim 1 is characterized in that: whether normally described control module is connected with and is used to detect control module voltage voltage detecting reseting module.
4, multiple frequence induction pressure resistant testing device as claimed in claim 1 is characterized in that: include the amplifying circuit that is used to measure electric current, voltage signal and electric current, voltage signal amplification is input to control module in the described acquisition module.
5, multiple frequence induction pressure resistant testing device as claimed in claim 1, it is characterized in that: described display module is a LCD MODULE backlight.
6, multiple frequence as claimed in claim 1 induction pressure resistant testing device is characterized in that: described control module by on can connect voltage divider.
CNU2008200556506U 2008-02-22 2008-02-22 Multi-doubling inductive voltage durability test apparatus Expired - Fee Related CN201156072Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200556506U CN201156072Y (en) 2008-02-22 2008-02-22 Multi-doubling inductive voltage durability test apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200556506U CN201156072Y (en) 2008-02-22 2008-02-22 Multi-doubling inductive voltage durability test apparatus

Publications (1)

Publication Number Publication Date
CN201156072Y true CN201156072Y (en) 2008-11-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200556506U Expired - Fee Related CN201156072Y (en) 2008-02-22 2008-02-22 Multi-doubling inductive voltage durability test apparatus

Country Status (1)

Country Link
CN (1) CN201156072Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102707173A (en) * 2012-06-11 2012-10-03 吉林省电力有限公司延边供电公司 Tester
CN103901332A (en) * 2014-04-23 2014-07-02 国网上海市电力公司 Three-phase frequency doubling sensing voltage-withstand test device
CN105334372A (en) * 2015-11-26 2016-02-17 国家电网公司 No-load current measurement device of large-size power transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102707173A (en) * 2012-06-11 2012-10-03 吉林省电力有限公司延边供电公司 Tester
CN103901332A (en) * 2014-04-23 2014-07-02 国网上海市电力公司 Three-phase frequency doubling sensing voltage-withstand test device
CN105334372A (en) * 2015-11-26 2016-02-17 国家电网公司 No-load current measurement device of large-size power transformer

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081126

Termination date: 20130222