CN203299368U - Current transformer calibration device - Google Patents

Current transformer calibration device Download PDF

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Publication number
CN203299368U
CN203299368U CN2013203069832U CN201320306983U CN203299368U CN 203299368 U CN203299368 U CN 203299368U CN 2013203069832 U CN2013203069832 U CN 2013203069832U CN 201320306983 U CN201320306983 U CN 201320306983U CN 203299368 U CN203299368 U CN 203299368U
Authority
CN
China
Prior art keywords
current transformer
reometer
checking
current
work
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
CN2013203069832U
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Chinese (zh)
Inventor
刘红恩
王清泉
张志勇
张建辉
张洪源
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.)
Wuji county power supply bureau
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Original Assignee
Wuji county power supply bureau
State Grid Corp of China SGCC
State Grid Hebei Electric Power 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
Publication date
Application filed by Wuji county power supply bureau, State Grid Corp of China SGCC, State Grid Hebei Electric Power Co Ltd filed Critical Wuji county power supply bureau
Priority to CN2013203069832U priority Critical patent/CN203299368U/en
Application granted granted Critical
Publication of CN203299368U publication Critical patent/CN203299368U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a current transformer calibration device comprising a voltage regulator, an adjustable resistor, a first ampere meter and a plurality of second ampere meters and further comprising a calibration table, wherein a voltage regulator body and an adjustable resistor body are arranged in a box body of the calibration table, and the first ampere meter and the second ampere meters are respectively embedded in a working table board of the calibration table. The working table board of the calibration table is provided with two groups of insulted struts, each group of insulted struts is composed of two insulators arranged in parallel, a copper bar is arranged on the top ends of the insulators through support rods, and the voltage regulator, the adjustable resistor and the copper bar form a primary circuit of a current transformer. The working table board of the calibration table is further provided with a plurality of groups of secondary wiring terminals, and the second ampere meters, the secondary wiring terminals and a secondary winding of the current transformer form a secondary circuit of the current transformer. The current transformer calibration device is simple in structure, can be used for calibrating a plurality of current transformers and is convenient to use and higher in work efficiency.

Description

The current transformer calibration equipment
Technical field
The utility model relates to a kind of electrical equipment pick-up unit, specifically a kind of current transformer calibration equipment.
Background technology
Mutual inductor is divided into the voltage transformer (VT) summation current transformer, and voltage transformer (VT) is a kind of equipment of scaling transformation voltage, and the high voltage scaling transformation is become to low-voltage; Current transformer is a kind of equipment of scaling transformation electric current, and large electric current scaling transformation is become to little electric current.Mutual inductor at the electric energy metrical of electric system, relay protection, automatically control etc. in device for voltage of transformation or electric current, also can be used to separate high-voltage system simultaneously, guarantees the safety of the person and equipment.
Current transformer is comprised of iron core, winding and the connection terminal of closure, can by certain no-load voltage ratio, be converted to the secondary current that numerical value is less to the larger primary current of numerical value, is used for protecting, measurement etc.During current transformer connection, its umber of turn seldom, directly is connected in power circuit; The Secondary Winding turn ratio is more, is serially connected in measurement instrument load and protection loop.Due to the One's name is legion of the use of current transformer in electric system, and each current transformer is in running order for a long time, and is significant to the safe operation of whole electric system, therefore must strictly control for the quality of each current transformer.
The estimated current transducer check is mainly to utilize pressure regulator, adjustable resistance and two reometers etc. to complete, in the loop that is comprised of pressure regulator, adjustable resistance and reometer, Secondary Winding directly connects another piece reometer by a windings in series of current transformer.In checking procedure, at first by regulating pressure regulator and adjustable resistance, the primary side that is embodied as current transformer applies electric current; After current stabilization, record respectively the reading of primary side current table and secondary side current table; Then the reading of two reometers carried out to no-load voltage ratio calculating, can verification whether go out current transformer qualified.At present, in the checking procedure of current transformer, for each current transformer, must carry out separately respectively verification, waste time and energy.
The utility model content
The utility model technical issues that need to address are to provide a kind of simple in structure, and are easy to use and can to a plurality of current transformers, carry out simultaneously the current transformer calibration equipment of verification.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
The current transformer calibration equipment, comprise pressure regulator, adjustable resistance, be used to the first reometer of measuring current transformer primary side current value and some be used to measuring the second reometer of Current Transformer Secondary side current value, also comprise a checking table, pressure regulator body, adjustable resistance body all are arranged in the casing of checking table, pressure regulator adjusting knob and adjustable resistance adjusting knob are separately positioned on the work top of checking table, and described the first reometer and the second reometer also are inlaid in respectively on the work top of checking table;
On the work top of described checking table, be provided with two groups of insulation columns, every group of insulation column is set up in parallel and formed by two insulators respectively, and the top of two insulators is connected by support bar; Between the support bar of described two groups of insulation columns, be provided with one be used to hanging the copper bar of current transformer; Two insulator bottoms of described first group of insulation column are connected with an end of adjustable resistance, the other end of adjustable resistance is connected with an output terminal of pressure regulator, another output terminal of pressure regulator is connected with two insulator bottoms of second group of insulation column, and described pressure regulator, adjustable resistance and copper bar form the primary circuit of current transformer;
On described checking table work top, also be provided with and the second reometer corresponding some groups of secondary connection posts one by one, every group of secondary connection post comprises two binding posts, two binding posts are connected with the two ends of the second reometer respectively, and the Secondary Winding of described the second reometer, secondary connection post and current transformer forms the secondary circuit of current transformer.
Further improvement of the utility model is: described calibration equipment also comprises automatic display unit, described automatic display unit comprises and is arranged on single-chip microcomputer, current conversion module, the power module in the checking table casing and is arranged on the touch display screen on the checking table work top, the input end of described power module connects AC power, and the output terminal of power module is connected with single-chip microcomputer, current conversion module and touch display screen respectively; The input end of current conversion module is connected with the second reometer with the first reometer respectively, and the output terminal of current conversion module is connected with the input end of single-chip microcomputer, single-chip microcomputer and touch display screen interconnection.
Further improvement of the utility model is: the junction of described support bar and copper bar is provided for clamping the clamping device of copper bar.
Further improvement of the utility model is: described the second reometer and secondary connection post are a word and arrange in order on the work top of checking table.
Further improvement of the utility model is: on the work top of described checking table, junction board is set, described the second reometer and secondary connection post correspondence respectively are arranged on junction board.
Further improvement of the utility model is: on the work top of described checking table, also be provided for the rubber cushion that prevents that table top is impaired.
Owing to having adopted technique scheme, the technical progress that the utility model is obtained is:
The utility model is simple in structure, and is easy to use, and a plurality of current transformers of verification simultaneously, improved work efficiency.Utilize the no-load voltage ratio that reaches the numerical evaluation current transformer that second reometer of connecting with secondary winding in current transformer records respectively with the first reometer of a windings in series of copper bar summation current transformer, and the error of current transformer is judged, determine whether current transformer is qualified.Use the output of electric current in pressure regulator and adjustable resistance adjusting, control loop, guarantee the safety of equipment, prevent casualties.
The automatic display unit that the utility model arranges, can calculate and show measured value and the testing result of tested current transformer automatically, without artificial, participates in computing, improved work efficiency, guaranteed the accuracy of current transformer verification.The setting of power module in automatic display unit, can effectively guarantee the stable output of electric current in checking procedure, but the large current signal that current conversion module records reometer converts the speech signal of single-chip microcomputer identifying processing to, utilize single-chip microcomputer data are processed and analysis obtains net result, and result is presented on touch display screen, realize the automatic operation of current transformer calibration equipment, improved work efficiency.
Support bar is connected by clamping device with copper bar, has guaranteed that the contact of primary circuit is good.By some the second reometers and corresponding orderly being arranged on junction board of secondary connection post, help better corresponding each binding post, improved the identification of binding post, prevent from causing equipment impaired because of staff's maloperation.
The rubber cushion that arranges on the checking table work top can prevent the breakage of checking table table top, increases the service life.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the operation block diagram of the utility model automatic display unit.
Wherein, 1, checking table, 2, junction board, 3, insulator, 4, current transformer, 5, copper bar, 6, binding post, the 7, second reometer, 8, rubber cushion, 9, wire, 10, the first reometer, 11, support bar, 12, touch display screen, 13, the pressure regulator adjusting knob, 14, the adjustable resistance adjusting knob.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further details:
Current transformer calibration equipment, its structure as shown in Figure 1, comprise checking table 1 and are arranged on pressure regulator, the adjustable resistance R in checking table and test the first reometer, the second reometer and the automatic display unit etc. of use.Wherein, automatic display unit comprises single-chip microcomputer, current conversion module, power module and touch display screen 12.
Described pressure regulator body and adjustable resistance body are arranged in the casing of checking table; Pressure regulator adjusting knob 13 and adjustable resistance adjusting knob 14 are separately positioned on the work top of checking table, conveniently according to actual conditions, circuit are carried out to regulation and control.Described the first reometer A 1With some the second reometer A 21, A 22..., A 2nAll setting-in is arranged on the work top of checking table, and wherein the first reometer 10 is be used to measuring the current value of current transformer primary side; The second reometer 7 is be used to measuring the current value of Current Transformer Secondary side.Some groups of secondary connection posts also are set on the work top of described checking table, and every group of binding post comprises the connection corresponding to the two ends of the second reometer 7 respectively of 6, two binding posts 6 of two binding posts.
For in order clean and tidy on the work top that keeps checking table, described the second reometer and corresponding secondary connection post are a word and arrange in order on the work top of checking table.For improving the identification of secondary connection post and the second reometer, maloperation while preventing wiring, arrange junction board 2 on the work top of checking table simultaneously, by secondary connection post and the equal concentrated setting of the second reometer 7 on junction board 2, and correspondence one by one.
Two ends on the work top of checking table arrange respectively one group of insulation column, every group of insulation column is set up in parallel and formed by two insulators 3, the top of described two insulators 3 is connected by support bar 11, a copper bar 5 is set between the support bar 11 of two groups of insulation columns, copper bar 5 is be used to hanging current transformer.For the close contact of copper bar 5 in the assurance checking procedure with support bar 11, in support bar 11 and the connection of copper bar 5, clamping device is set.Described clamping device comprises two clamping plate that be arranged in parallel, and the spring that is in extended state is set between two clamping plates.
Single-chip microcomputer in described automatic display unit, current conversion module and power module are arranged in the casing of checking table, and touch display screen 12 is arranged on the work top of checking table, and the operation block diagram of automatic display unit as shown in Figure 2.The input end of power module connects AC power; The output terminal of power module is connected with single-chip microcomputer, current conversion module and touch display screen 12 respectively, for checking procedure provides stable operating voltage and electric current.The input end of current conversion module is connected with the second reometer with the first reometer respectively, and the output terminal of current conversion module is connected with the input end of single-chip microcomputer, single-chip microcomputer and touch display screen 12 interconnection.Current conversion module converts the speech signal that can supply single-chip microcomputer to process to for the numerical signal by the first reometer and the output of the second reometer, single-chip microcomputer carries out analytical calculation to the result that gathers and show whether tested current transformer is qualified, result is transferred to touch display screen 12 and shows.Touch display screen 12 can also be inputted the design no-load voltage ratio of tested current transformer, is transferred to single-chip microcomputer and participates in computing.
Impaired for preventing table top, rubber cushion 8 also is set on the work top of described checking table.
The utility model is as follows for detection of the specific operation process of current transformer:
At first, connection detection circuit: the primary circuit and the secondary circuit that connect respectively current transformer 4.The connected mode of described primary circuit is: after on copper bar 5, hanging a plurality of current transformers 4 that need to carry out verification, copper bar 5 is fixed in the clamping device on insulator 3 apical support bars 11, the bottom of two insulators 3 of one group of insulation column is connected with the end of adjustable resistance R, the other end of adjustable resistance R is connected with an output terminal of pressure regulator, another output terminal of pressure regulator is connected with the bottom of two insulators 3 of another group insulation column, and also series connection arranges the first reometer A between pressure regulator and insulation column 1, i.e. pressure regulator, adjustable resistance R and the first reometer A 1And copper bar 5 forms the primary circuit of current transformer 4.The connected mode of described secondary circuit is: the second reometer is connected by wire with corresponding with it secondary connection post, by the Secondary Winding of wire 9 connecting secondary binding posts and current transformer, namely the secondary windings in series of the secondary connection post of the second reometer 7 and correspondence and current transformer forms the secondary circuit of each current transformer 4 again.When on copper bar 5, being hung with a plurality of current transformer, each current transformer is connected with corresponding with it secondary connection post with second reometer respectively, thereby forms a plurality of secondary circuits arranged side by side.
After the circuit connection is complete, switch on power, the current transformer calibration equipment brings into operation, and regulates pressure regulator adjusting knob 13 and adjustable resistance adjusting knob 14 on the checking table work top, stablizing of voltage and current in control circuit, guarantee the stable operation of current transformer calibration equipment.By the first reometer 10 and the second reometer 7, record respectively the current values in each self-loop, current conversion module converts the current values signal of collection to single-chip microcomputer discernible speech signal, utilize single-chip microcomputer record, process and analyze data, finally obtain electric current no-load voltage ratio and the check results of each current transformer 4, whether the automatic decision current transformer is qualified, and result is presented on touch display screen 12.

Claims (6)

1. current transformer calibration equipment, comprise pressure regulator, adjustable resistance, for measuring the first reometer of current transformer primary side current value and some be used to measuring the second reometer of Current Transformer Secondary side current value, it is characterized in that: also comprise a checking table (1), pressure regulator body, the adjustable resistance body all is arranged in the casing of checking table, pressure regulator adjusting knob (13) and adjustable resistance adjusting knob (14) are separately positioned on the work top of checking table, described the first reometer and the second reometer also are inlaid in respectively on the work top of checking table,
On the work top of described checking table, be provided with two groups of insulation columns, every group of insulation column is set up in parallel and formed by two insulators (3) respectively, and the top of two insulators (3) is connected by support bar (11); Between the support bar of described two groups of insulation columns (11), be provided with a copper bar (5) be used to hanging current transformer; Two insulator bottoms of described first group of insulation column are connected with an end of adjustable resistance, the other end of adjustable resistance is connected with an output terminal of pressure regulator, another output terminal of pressure regulator is connected with two insulator bottoms of second group of insulation column, and described pressure regulator, adjustable resistance and copper bar (5) form the primary circuit of current transformer;
On described checking table work top, also be provided with and the second reometer corresponding some groups of secondary connection posts one by one, every group of secondary connection post comprises two binding posts (6), two binding posts are connected with the two ends of the second reometer respectively, and the Secondary Winding of described the second reometer, secondary connection post and current transformer forms the secondary circuit of current transformer.
2. current transformer calibration equipment according to claim 1, it is characterized in that: described calibration equipment also comprises automatic display unit, described automatic display unit comprises and is arranged on single-chip microcomputer, current conversion module, the power module in the checking table casing and is arranged on the touch display screen (12) on the checking table work top, the input end of described power module connects AC power, and the output terminal of power module is connected with single-chip microcomputer, current conversion module and touch display screen respectively; The input end of current conversion module is connected with the second reometer with the first reometer respectively, and the output terminal of current conversion module is connected with the input end of single-chip microcomputer, single-chip microcomputer and touch display screen interconnection.
3. current transformer calibration equipment according to claim 1 is characterized in that: described support bar (11) and the junction of copper bar (5) are provided for clamping the clamping device of copper bar.
4. current transformer calibration equipment according to claim 1, it is characterized in that: described the second reometer and secondary connection post are a word and arrange in order on the work top of checking table (1).
5. current transformer calibration equipment according to claim 4, it is characterized in that: junction board (2) is set on the work top of described checking table, and described the second reometer and secondary connection post correspondence respectively are arranged on junction board (2).
6. the described current transformer calibration equipment of according to claim 1 to 5 any one, is characterized in that: on the work top of described checking table, also be provided for preventing the impaired rubber cushion of table top (8).
CN2013203069832U 2013-05-30 2013-05-30 Current transformer calibration device Expired - Fee Related CN203299368U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013203069832U CN203299368U (en) 2013-05-30 2013-05-30 Current transformer calibration device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013203069832U CN203299368U (en) 2013-05-30 2013-05-30 Current transformer calibration device

Publications (1)

Publication Number Publication Date
CN203299368U true CN203299368U (en) 2013-11-20

Family

ID=49575373

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013203069832U Expired - Fee Related CN203299368U (en) 2013-05-30 2013-05-30 Current transformer calibration device

Country Status (1)

Country Link
CN (1) CN203299368U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103293508A (en) * 2013-05-30 2013-09-11 国家电网公司 Current transformer calibration device
CN104090255A (en) * 2014-07-04 2014-10-08 天津市百利电气有限公司 Primary-side clamp device for testing of straight-through current transformer and using method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103293508A (en) * 2013-05-30 2013-09-11 国家电网公司 Current transformer calibration device
CN103293508B (en) * 2013-05-30 2016-05-18 国家电网公司 Current transformer calibration equipment
CN104090255A (en) * 2014-07-04 2014-10-08 天津市百利电气有限公司 Primary-side clamp device for testing of straight-through current transformer and using method

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131120

Termination date: 20190530

CF01 Termination of patent right due to non-payment of annual fee