CN211826456U - Rack-type mutual inductor iron core magnetic saturation margin tester - Google Patents
Rack-type mutual inductor iron core magnetic saturation margin tester Download PDFInfo
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- CN211826456U CN211826456U CN201921880675.4U CN201921880675U CN211826456U CN 211826456 U CN211826456 U CN 211826456U CN 201921880675 U CN201921880675 U CN 201921880675U CN 211826456 U CN211826456 U CN 211826456U
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Abstract
The utility model provides a rack-type mutual-inductor iron core magnetic saturation margin tester, include: the magnetic saturation margin tester comprises a main body shell and an iron core magnetic saturation margin tester positioned in the main body shell; the main body shell comprises an outer interface area, a panel area positioned below the outer interface area, handles arranged on the left side and the right side of the main body shell, a switch and rollers; the outer interface area is a circular hole formed in the main body shell and is connected with the magnetic saturation margin tester of the iron core in the main body shell through a circuit; the panel area comprises a liquid crystal display screen, an emergency stop button, a reset button and a communication interface; the lifting handles are fixedly arranged on the left side surface and the right side surface of the main body shell through screws; the roller is fixedly arranged at the bottom of the main body shell through a screw; the utility model has the advantages that: the excitation induction curve is displayed in a TFT liquid crystal lattice display mode, and meanwhile, the iron core magnetic saturation margin tester is installed by adopting a machine box type framework, so that the wiring is convenient and safe, and the isolation effect is good.
Description
Technical Field
The utility model relates to a power transformer equipment field especially relates to a rack-type mutual-inductor iron core magnetic saturation margin tester.
Background
The current transformer iron core made of the high-magnetic-conductance material has small design margin, and the effective section of the iron core is reduced in transportation, installation and use, so that the saturation point is close to the 120% point of rated voltage and current. When the current transformer is subjected to error detection and use, the magnetic field of the primary return conductor can enable the magnetic flux density of the iron core to have 1/6 asymmetry, and if the two asymmetric parts of the iron core are not saturated, the error of the current transformer cannot be significantly influenced. However, if one side of the iron core is saturated, the error of the current transformer is obviously changed, so that the error of the current transformer is unqualified. It is necessary to secure the magnetic saturation margin of the core not less than 1.5 times. The traditional iron core magnetic saturation margin instrument tests an excitation current effective value, an excitation induction curve cannot be formed, the adopted structural form is a non-rack type, and the uniformity and the flexibility are poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to develop a rack-type mutual-inductor iron core magnetic saturation margin tester, aim at adopting the rack-type structure to carry liquid crystal display's iron core magnetic saturation margin tester fixed mounting, can show current transformer excitation induction curve in real time to whether look over current transformer and reach standard, the convenient removal simultaneously.
In order to achieve the above object, a rack-type mutual-inductor iron core magnetic saturation margin tester, include: the magnetic saturation margin tester comprises a main body shell and an iron core magnetic saturation margin tester positioned in the main body shell; the main body shell comprises an outer interface area, a panel area positioned below the outer interface area, handles arranged on the left side and the right side of the main body shell, a switch and rollers; the outer interface area is a circular hole formed in the main body shell, is connected with the magnetic saturation margin tester of the iron core in the main body shell through a circuit and is used for external wiring and state indication; the lifting handles are fixedly arranged on the left side surface and the right side surface of the main body shell through screws; the roller is fixedly arranged at the bottom of the main body shell through a screw; and carrying out external wiring through the external interface area, operating through the panel area, measuring an excitation induction curve of the current transformer, and moving the iron core magnetic saturation margin tester through the handle and the roller.
Furthermore, the external interface area comprises a single-phase alternating current input interface, a power state indicator lamp, an output interface and a grounding end; the single-phase alternating current input interface is used for accessing a single-phase alternating current power supply and supplying power to the iron core magnetic saturation margin tester; the power state indicator lamp is used for indicating the power-on state, the power state indicator lamp is red under the power-on condition, and the power state indicator lamp (14) is turned off under the power-off condition; the output interface is connected to two ends of the secondary side of the voltage or current transformer through a lead so as to measure the effective value of the exciting current; the grounding end is grounded to prevent the main body shell from electric leakage.
Furthermore, the panel area comprises a liquid crystal display screen, an emergency stop button, a reset button and a communication interface, and the liquid crystal display screen controls the iron core magnetic saturation margin tester to perform iron core magnetic saturation margin testing.
Further, the communication interface is an isolation RS485 interface, and the adopted communication protocol is a standard Modbus RTU protocol.
Further, the liquid crystal display screen displays 0V to 2 times of rated secondary voltage of the output alternating voltage, simultaneously displays effective values of exciting currents corresponding to all voltage points, and sequentially draws an exciting induction curve in real time according to the effective values of the exciting currents.
Further, the measuring voltage range of the iron core magnetic saturation margin tester is 0.1V-220V, and the measuring current range is 0.1A-8A, including end points.
Further, there are 4 handles, be located the left side and the right side of main part shell respectively, two respectively on each side.
Further, there are 4 rollers, respectively located at the 4 corner vertexes of the bottom of the main body casing.
The iron core magnetic saturation margin tester comprises a serial port communication module, an HMI (human machine interface), a control circuit, an AD (analog-to-digital) signal sampler, a variable frequency power supply, an output relay, a voltage sensor and a current sensor; the serial port communication module is used for communicating with an upper computer and transmitting a control instruction through the serial port communication module so as to adjust the amplitude and the frequency of the output of the variable frequency power supply through a control circuit; the HMI human-computer interface is mounted on the liquid crystal display screen (2) and used for displaying an excitation induction curve of the power transformer to be tested; the AD signal sampler is used for receiving analog quantities from the voltage sensor and the current sensor, converting the analog quantities into digital quantities and transmitting the digital quantities to the control circuit; the voltage transformers and the current transformers are divided into two groups, one group is used for detecting the voltage and the current of the variable frequency power supply, and the other group is used for detecting the voltage and the current of the power transformer to be detected; the control circuit controls the variable frequency power supply to stably output according to the detected voltage and current of the variable frequency power supply; the control circuit calculates and generates an excitation induction curve to the HMI (human machine interface) for display according to the detected voltage and current of the detected power transformer; the output relay is electrically connected with the variable frequency power supply and used for controlling the output and disconnection of the variable frequency power supply.
The utility model provides a beneficial effect that technical scheme brought is: the excitation induction curve is displayed in a TFT liquid crystal lattice display mode, and meanwhile, the iron core magnetic saturation margin tester is installed by adopting a machine box type framework, so that the wiring is convenient and safe, and the isolation effect is good.
Drawings
Fig. 1 is a schematic structural diagram of a rack-mounted transformer iron core magnetic saturation margin tester.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Please refer to fig. 1, an embodiment of the present invention provides a rack-mounted transformer core magnetic saturation margin tester, which specifically includes:
the magnetic saturation margin tester comprises a main body shell and an iron core magnetic saturation margin tester positioned in the main body shell; the main body shell comprises an outer interface area 1, a panel area positioned below the outer interface area, lifting handles 6 arranged on the left side and the right side of the main body shell, a switch 7 and rollers 8; the outer interface area is a circular hole formed in the main body shell, is connected with the magnetic saturation margin tester of the iron core in the main body shell through a circuit and is used for external wiring and state indication; the lifting handles are fixedly arranged on the left side surface and the right side surface of the main body shell through screws; the roller is fixedly arranged at the bottom of the main body shell through a screw; external wiring is carried out through the external interface area 1, operation is carried out through the panel area, a voltage or current transformer excitation induction curve is measured, and the movement of the iron core magnetic saturation margin tester is carried out through the lifting handle 6 and the idler wheel 8.
The external interface area 1 comprises a three-phase alternating current input interface 11, a power state indicator lamp 14, an output interface 12 and a grounding end 13; the single-phase alternating current input interface 11 is used for accessing a single-phase alternating current power supply and supplying power to the iron core magnetic saturation margin tester; the power status indicator lamp 14 is used for indicating a power on status, when the power is on, the power status indicator lamp 14 is on red, and when the power is off, the power status indicator lamp 14 is off; the output interface 12 is connected to two ends of a voltage or current transformer through a lead to measure an excitation current effective value; the ground terminal 13 is grounded to prevent the main body case from leaking electricity.
The panel area comprises a liquid crystal display screen 2, an emergency stop button 4, a reset button 5 and a communication interface 3, and the liquid crystal display screen controls the iron core magnetic saturation margin tester to perform iron core magnetic saturation margin test.
The communication interface 3 is an isolation RS485 interface, and the adopted communication protocol is a standard Modbus RTU protocol.
The liquid crystal display screen 2 displays 0V to 2 times rated secondary voltage of the output alternating voltage, simultaneously displays the effective value of the exciting current corresponding to each voltage point, and sequentially draws an exciting induction curve in real time according to the effective value of the exciting current.
The measuring voltage range of the iron core magnetic saturation margin tester is 0.1V-220V, and the measuring current range is 0.1A-8A, which all comprise end points.
The number of the handles 6 is 4, and the handles are respectively positioned on the left side and the right side of the main body shell, and two handles are arranged on each side.
The rollers 8 are 4 and are respectively positioned at the top points of 4 corners at the bottom of the main shell.
The iron core magnetic saturation margin tester comprises a serial port communication module, an HMI (human machine interface), a control circuit, an AD (analog-to-digital) signal sampler, a variable frequency power supply, an output relay, a voltage sensor and a current sensor; the serial port communication module is used for communicating with an upper computer and transmitting a control instruction through the serial port communication module so as to adjust the amplitude and the frequency of the output of the variable frequency power supply through a control circuit; the HMI human-computer interface is mounted on the liquid crystal display screen (2) and used for displaying an excitation induction curve of the power transformer to be tested; the AD signal sampler is used for receiving analog quantities from the voltage sensor and the current sensor, converting the analog quantities into digital quantities and transmitting the digital quantities to the control circuit; the voltage transformers and the current transformers are divided into two groups, one group is used for detecting the voltage and the current of the variable frequency power supply, and the other group is used for detecting the voltage and the current of the power transformer to be detected; the control circuit controls the variable frequency power supply to stably output according to the detected voltage and current of the variable frequency power supply; the control circuit calculates and generates an excitation induction curve to the HMI (human machine interface) for display according to the detected voltage and current of the detected power transformer; the output relay is electrically connected with the variable frequency power supply and used for controlling the output and disconnection of the variable frequency power supply.
The utility model provides a beneficial effect that technical scheme brought is: the excitation induction curve is displayed in a TFT liquid crystal lattice display mode, and meanwhile, the iron core magnetic saturation margin tester is installed by adopting a machine box type framework, so that the wiring is convenient and safe, and the isolation effect is good.
In this document, the terms front, back, upper and lower are used to define the positions of the devices in the drawings and the positions of the devices relative to each other, and are used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. The utility model provides a rack-mounted mutual-inductor iron core magnetic saturation margin tester which characterized in that: the method specifically comprises the following steps: the magnetic saturation margin tester comprises a main body shell and an iron core magnetic saturation margin tester positioned in the main body shell; the main body shell comprises an outer interface area (1), a panel area positioned below the outer interface area, lifting handles (6) arranged on the left side and the right side of the main body shell, a switch (7) and rollers (8); the outer interface area is a circular hole formed in the main body shell, is connected with the magnetic saturation margin tester of the iron core in the main body shell through a circuit and is used for external wiring and state indication; the lifting handles are fixedly arranged on the left side surface and the right side surface of the main body shell through screws; the roller is fixedly arranged at the bottom of the main body shell through a screw; external wiring is carried out through the external interface area (1), operation is carried out through the panel area, the excitation induction curve of the current transformer is measured, and the movement of the iron core magnetic saturation margin tester is carried out through the lifting handle (6) and the rolling wheel (8).
2. The rack-mounted transformer core magnetic saturation margin tester of claim 1, wherein: the external interface area (1) comprises a single-phase alternating current input interface (11), a power state indicator lamp (14), an output interface (12) and a grounding end (13); the single-phase alternating current input interface (11) is used for being connected with a single-phase alternating current power supply and supplying power to the iron core magnetic saturation margin tester; the power state indicator lamp (14) is used for indicating the power on state, under the power-on condition, the power state indicator lamp (14) is bright red, and under the power-off condition, the power state indicator lamp (14) is turned off; the output interface (12) is connected to two ends of the current transformer through a lead to measure the effective value of the exciting current; the grounding end (13) is grounded to prevent the main body shell from electric leakage.
3. The rack-mounted transformer core magnetic saturation margin tester of claim 1, wherein: the panel area comprises a liquid crystal display (2), an emergency stop button (4), a reset button (5) and a communication interface (3), and the liquid crystal display controls the iron core magnetic saturation margin tester to perform iron core magnetic saturation margin test.
4. The rack-mounted transformer core magnetic saturation margin tester of claim 3, wherein: the communication interface (3) is an isolation RS485 interface, and the adopted communication protocol is a standard Modbus RTU protocol.
5. The rack-mounted transformer core magnetic saturation margin tester of claim 3, wherein: the liquid crystal display screen (2) displays the output alternating voltage of 0V to 2 times of rated secondary voltage of the voltage transformer, simultaneously displays the effective value of the exciting current corresponding to each voltage point, and sequentially draws an exciting induction curve in real time according to the effective value of the exciting current.
6. The rack-mounted transformer core magnetic saturation margin tester of claim 1, wherein: the measuring voltage range of the transformer iron core magnetic saturation margin tester is 0.1V-220V, the measuring current range is 0.1A-8A, and the measuring voltage range and the measuring current range both comprise end points.
7. The rack-mounted transformer core magnetic saturation margin tester of claim 1, wherein: the number of the handles (6) is 4, the handles are respectively positioned on the left side and the right side of the main body shell, and two handles are respectively positioned on each side.
8. The rack-mounted transformer core magnetic saturation margin tester of claim 1, wherein: the number of the rollers (8) is 4, and the rollers are respectively positioned at the top points of 4 corners at the bottom of the main shell.
9. The rack-mounted transformer core magnetic saturation margin tester of claim 3, wherein: the iron core magnetic saturation margin tester comprises a serial port communication module, an HMI (human machine interface), a control circuit, an AD (analog-to-digital) signal sampler, a variable frequency power supply, an output relay, a voltage sensor and a current sensor; the serial port communication module is used for communicating with an upper computer and transmitting a control instruction through the serial port communication module so as to adjust the amplitude and the frequency of the output of the variable frequency power supply through a control circuit; the HMI human-computer interface is mounted on the liquid crystal display screen (2) and used for displaying an excitation induction curve of the current sensor to be detected; the AD signal sampler is used for receiving analog quantities from the voltage sensor and the current sensor, converting the analog quantities into digital quantities and transmitting the digital quantities to the control circuit; the voltage sensors and the current sensors are divided into two groups, one group is used for detecting the voltage and the current of the variable frequency power supply, and the other group is used for detecting the voltage and the current of the tested power transformer; the control circuit controls the variable frequency power supply to stably output according to the detected voltage and current of the variable frequency power supply; the control circuit calculates and generates an excitation induction curve to the HMI (human machine interface) for display according to the detected voltage and current of the detected power transformer; the output relay is electrically connected with the variable frequency power supply and used for controlling the output and disconnection of the variable frequency power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921880675.4U CN211826456U (en) | 2019-11-04 | 2019-11-04 | Rack-type mutual inductor iron core magnetic saturation margin tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921880675.4U CN211826456U (en) | 2019-11-04 | 2019-11-04 | Rack-type mutual inductor iron core magnetic saturation margin tester |
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| Publication Number | Publication Date |
|---|---|
| CN211826456U true CN211826456U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921880675.4U Active CN211826456U (en) | 2019-11-04 | 2019-11-04 | Rack-type mutual inductor iron core magnetic saturation margin tester |
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| Country | Link |
|---|---|
| CN (1) | CN211826456U (en) |
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- 2019-11-04 CN CN201921880675.4U patent/CN211826456U/en active Active
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