CN216899322U - Range-adjustable main transformer temperature transmitter - Google Patents
Range-adjustable main transformer temperature transmitter Download PDFInfo
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- CN216899322U CN216899322U CN202220570398.2U CN202220570398U CN216899322U CN 216899322 U CN216899322 U CN 216899322U CN 202220570398 U CN202220570398 U CN 202220570398U CN 216899322 U CN216899322 U CN 216899322U
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Abstract
The utility model discloses a range-adjustable main transformer temperature transmitter, which is provided with a shell, wherein a processing module is arranged in the shell, a top plate is arranged at the upper end of the shell, a bottom plate is arranged at the lower end of the shell, a side wall is arranged between the top plate and the bottom plate, an input port and an alarm contact are arranged on the top plate, the input port is a first path of input and a second path of input, the alarm contact is an alarm contact of a first path of device and an alarm contact of a second path of device, a control switch and an output terminal are arranged on the side wall, the control switch comprises SET1 and SET2, SET1 is a dial switch of a first path of input signal, SET2 is a dial switch of a second path of input signal, and a clamping groove is arranged on the bottom plate. The technology covers the measuring range of the currently common main transformer oil temperature meter corresponding to the temperature input measuring range of 0-100 ℃, 0-120 ℃, 0-150 ℃ and 0-160 ℃; the dial switch is used for changing the chip program, so that the range is convenient and fast to adjust; the access ports can be provided for two main transformer oil temperature meters at the same time.
Description
Technical Field
The utility model relates to the field of transmitter equipment, in particular to a range-adjustable main transformer temperature transmitter.
Background
The oil temperature and the winding temperature of the main transformer are important non-electric quantity indexes of the transformer, and the insulation of the main transformer and the service life of the main transformer are seriously influenced by overhigh temperature. The measurement of the main transformer temperature is realized by the platinum resistance oil temperature meter through the conversion of a temperature transmitter.
Because the measuring range of the oil temperature meter and the model specification of the temperature transmitter need to be in one-to-one correspondence, and the number and the types of spare parts of an overhaul unit are limited, when the oil temperature meter or the temperature transmitter is replaced, inconvenience is caused frequently because the measuring range of the oil temperature meter is inconsistent with the model specification of the temperature transmitter, the main transformer temperature transmitter needs to be replaced when the main transformer oil temperature meter is replaced every time, or the transmitter needs to be replaced and matched with the oil temperature meter. Therefore, maintenance units must be equipped with various oil temperature meters and temperature transmitters, and the operation and maintenance cost and workload are increased.
The existing voltage output type temperature transmitter has the defects of poor anti-interference capability, large output loss, low precision and the like, and the design is not considered; the existing temperature transmitters with adjustable measuring range are programmable temperature transmitters, and need a PC to connect setting parameters when in use, so the use method is complex and the cost is high. Therefore, the problem can be solved by developing a current output type range-adjustable main transformer temperature transmitter.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the existing voltage output type temperature transmitter has the defects of poor anti-interference capability, large output loss, low precision and the like, and the design is not considered; the existing temperature transmitters with adjustable measuring range are programmable temperature transmitters, and need a PC to connect setting parameters when in use, so the use method is complex and the cost is high. Therefore, the problem can be solved by developing a current output type range-adjustable main transformer temperature transmitter.
In order to solve the technical problems, the utility model adopts the following technical means:
the main temperature transmitter that becomes with adjustable range, the changer is equipped with the casing, is equipped with processing module in the casing, and the casing upper end is equipped with the roof, and the casing lower extreme is equipped with the bottom plate, is equipped with the lateral wall between roof and the bottom plate, is equipped with input port and warning contact on the roof, input port is first way input and second way input respectively, the warning contact is the warning contact of the first way device and the warning contact of second way device respectively, be equipped with control switch and output terminal on the lateral wall, control switch includes SET1 and SET2, and SET1 is the dial switch of input signal all the way, and SET2 is the dial switch of second way input signal, the bottom plate is equipped with the draw-in groove.
Preferably, the further technical scheme of the utility model is as follows:
the shell is provided with a 24V direct-current power supply input end interface.
The roof is equipped with status indicator, the status indicator is Run and Err, Run is normal operating indicator, Err is operation warning indicator.
The first path of input is arranged adjacent to the position of the alarm joint point of the first path of device, and the second path of input is arranged adjacent to the position of the alarm joint point of the second path of device.
The first path of input is provided with ports 1A, 1B and 1B, the second path of input is provided with ports 2A, 2B and 2B, the alarm joint of the first path of device is provided with ports C, NO and NC of the first path, and the alarm joint of the second path of device is provided with ports C, NO and NC of the second path.
The output terminals are OUT1 and OUT2, OUT1 is a first 4-20mA output signal terminal, and OUT2 is a second 4-20mA output signal terminal.
The clamping groove is a national standard iron guide rail installation clamping groove.
The size of the transducer is 76 × 40 × 90mm in length, width and height respectively.
The shell is provided with a heat dissipation grid, the heat dissipation grid is provided with heat dissipation holes, and the heat dissipation holes are rectangular strip-shaped.
The utility model has the following characteristics:
1. the temperature transmitter has wide application range, and the range of the range is 0-100 ℃, 0-120 ℃, 0-150 ℃ and 0-160 ℃ covers the range of the oil temperature meter of the main transformer which is commonly used at present;
2. the temperature transmitter realizes free switching of input ranges through the dial switch, and is convenient and quick to apply;
3. the temperature transmitter uses a 24V direct current source, so that the anti-interference capability is strong, the stability is good, and the energy consumption is low;
4. c45 national standard iron guide rail is convenient to install;
5. the temperature transmitter can provide conversion of two oil temperature meters at the same time;
6. at present, the temperature transmitter can be replaced by the temperature transmitter, so that the power transformation overhaul production work can be simplified, and the operation and maintenance cost and the workload can be reduced.
7. The temperature transmitter circuit is mature and reliable in application, high in conversion precision, and capable of easily realizing batch production of the temperature transmitter with adjustable measuring range through integration and modular circuits.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a control diagram of the processing module of the present invention.
FIG. 3 is a diagram of a dial switch control according to the present invention.
Description of reference numerals: 1-a transmitter; 2-a card slot; 3-first path input; 4-alarm contact of the first path device; 5-second path input; 6-alarm contact of the second path device; 7-a dial switch for the first path of input signal; 8-a dial switch of the second path of input signals; 9-a first path of 4-20mA output signal terminal; 10-second path 4-20mA output signal terminal.
Detailed Description
The present invention will be further described with reference to the following examples.
Specific example 1:
referring to fig. 1, the appearance of the range-adjustable main transformer temperature transmitter of the utility model is as follows:
g is a 24V direct-current power supply input end;
1A, 1B and 1B are input of a first path, and adjacent C, NO and NC are alarm connection points of the first path of device;
2A, 2B and 2B are input of the second path, and the other paths C, NO and NC are alarm connection points of the second path of device;
run is a normal operation indicator lamp, Err is an operation alarm indicator lamp;
the SET1 is a dial switch of the first input signal, and the SET2 is a dial switch of the second input signal;
OUT1 is a first 4-20mA output signal terminal, OUT2 is a second 4-20mA output signal terminal;
c45 national standard iron guide rail mounting clamping grooves;
the external dimension of the temperature transmitter is 76 x 40 x 90mm
The rest grids are heat dissipation holes.
Specific example 2:
referring to fig. 1, the principle of the range-adjustable main transformer temperature transmitter of the utility model is as follows:
the resistance value of a platinum resistor of the oil temperature meter is in a linear relation with the temperature change, and the resistance value can be converted into a constant current signal of 4-20mA in a linear relation with the measured temperature through a conversion circuit of the temperature transmitter.
The temperature transmitter can be accessed to output signals of two oil temperature meters, the corresponding oil temperature meter ranges are four, and the ranges are 0-100 ℃, 0-120 ℃, 0-150 ℃ and 0-160 ℃, and the range covers the range of the currently common main transformer oil temperature meter.
Resistance output signals of the two oil temperature meters are respectively connected into TE1 and TE2, and constant current signal output ends are AO1 and AO 2. Each input path is respectively provided with a corresponding dial switch which can control the program of the chip to be changed, so that the input range of the oil temperature meter is selected. After the dial switch selects the range of the input oil temperature meter, each path of main transformer oil temperature meter resistance input signal enters a temperature transmitter circuit, and after the processing of circuits such as voltage stabilizing filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse protection and the like, the constant current 0-20mA output signal which is in linear relation with the temperature can be reliably converted.
The temperature transmitter sets programs for oil temperature meters with different measuring ranges through the dial switch, and verifies the accuracy of design through the adjustment test of the temperature transmitter, so that the linear conversion of temperature and current output is realized.
Specific example 3:
referring to fig. 1, the setting method of the dial switch of the present invention includes:
wherein, the 1 st path to the 4 th path of the dial switch respectively corresponds to the oil temperature meter range of 0-100 ℃, 0-120 ℃, 0-150 ℃ and 0-160 ℃. If the input range of the used oil temperature meter is 0-150 ℃, only the 3 rd path dial switch is turned ON, and the rest are turned OFF. The same process is carried out for the rest.
1. The corresponding temperature input range is 0-100 ℃, 0-120 ℃, 0-150 ℃ and 0-160 ℃ which covers the range of the currently common main transformer oil temperature meter;
2. the dial switch is used for changing the chip program, so that the range is convenient and fast to adjust;
3. the access ports can be provided for two main transformer oil temperature meters at the same time.
Since the above description is only a specific embodiment of the present invention, but the protection of the present invention is not limited thereto, any equivalent changes or substitutions of the technical features of the present invention which can be conceived by those skilled in the art are included in the protection scope of the present invention.
Claims (9)
1. Main temperature transmitter that becomes with adjustable range, its characterized in that: the transmitter is provided with a shell, a processing module is arranged in the shell, a top plate is arranged at the upper end of the shell, a bottom plate is arranged at the lower end of the shell, a side wall is arranged between the top plate and the bottom plate, an input port and an alarm contact are arranged on the top plate, the input port is a first path of input and a second path of input, the alarm contact is an alarm contact of a first path of device and an alarm contact of a second path of device, a control switch and an output terminal are arranged on the side wall, the control switch comprises a SET1 and a SET2, a SET1 is a dial switch of a first path of input signal, a SET2 is a dial switch of a second path of input signal, and a clamping groove is formed in the bottom plate.
2. The range adjustable main transformer temperature transmitter of claim 1, wherein: the shell is provided with a 24V direct-current power supply input end interface.
3. The range adjustable main transformer temperature transmitter of claim 1, wherein: the roof is equipped with status indicator, the status indicator is Run and Err, Run is normal operating indicator, Err is operation warning indicator.
4. The range adjustable main transformer temperature transmitter of claim 1, wherein: the first path of input is arranged adjacent to the position of the alarm joint point of the first path of device, and the second path of input is arranged adjacent to the position of the alarm joint point of the second path of device.
5. The range adjustable main transformer temperature transmitter of claim 1, wherein: the first path of input is provided with ports 1A, 1B and 1B, the second path of input is provided with ports 2A, 2B and 2B, the alarm joint of the first path of device is provided with ports C, NO and NC of the first path, and the alarm joint of the second path of device is provided with ports C, NO and NC of the second path.
6. The range adjustable main transformer temperature transmitter of claim 1, wherein: the output terminals are OUT1 and OUT2, OUT1 is a first 4-20mA output signal terminal, and OUT2 is a second 4-20mA output signal terminal.
7. The range adjustable main transformer temperature transmitter of claim 1, wherein: the clamping groove is a national standard iron guide rail installation clamping groove.
8. The range adjustable main transformer temperature transmitter of claim 1, wherein: the size of the transducer is 76 x 40 x 90mm in length, width and height respectively.
9. The range adjustable main transformer temperature transmitter of claim 1, wherein: the shell is provided with a heat dissipation grid, the heat dissipation grid is provided with heat dissipation holes, and the heat dissipation holes are rectangular strip-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220570398.2U CN216899322U (en) | 2022-03-16 | 2022-03-16 | Range-adjustable main transformer temperature transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220570398.2U CN216899322U (en) | 2022-03-16 | 2022-03-16 | Range-adjustable main transformer temperature transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216899322U true CN216899322U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220570398.2U Active CN216899322U (en) | 2022-03-16 | 2022-03-16 | Range-adjustable main transformer temperature transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216899322U (en) |
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2022
- 2022-03-16 CN CN202220570398.2U patent/CN216899322U/en active Active
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