CN109709481A - DCR of Transformer and load ratio bridging switch comprehensive test device - Google Patents
DCR of Transformer and load ratio bridging switch comprehensive test device Download PDFInfo
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Abstract
DCR of Transformer of the present invention and load ratio bridging switch comprehensive test device belong to DCR of Transformer and load ratio bridging switch comprehensive test device technical field；Technical problem to be solved are as follows: a kind of DCR of Transformer and load ratio bridging switch comprehensive test device are provided；Solve the technical solution of technical problem use are as follows: including cabinet, the front of the cabinet is provided with LED display, control button；The side of cabinet is provided with Hi-pot test port, low voltage experiment port, and the other side of cabinet is provided with power module, data communication module and constant current source module；Cabinet is internally provided with control circuit board, and central controller is integrated in control circuit board, and central controller is connected with LED display, control button, data communication module, constant current source module respectively by conducting wire；Data communication module is connected by wireless network with wireless temperature probe；The present invention is applied to the place of measuring transformer D.C. resistance.
Description
Technical field
DCR of Transformer of the present invention and load ratio bridging switch comprehensive test device, belong to DCR of Transformer and have
On-load shunting switch comprehensive test device technical field.
Background technique
D.C. resistance test job to transformer winding is that transformer must after handover, overhaul and change tap switch
Indispensable pilot project, load ratio bridging switch are the unique motion components connecting with transformer circuit, therefore are needed in test
Load ratio bridging switch is detected simultaneously, in " power equipment hand-over and preventive test regulation ", detection project includes
Check the sequence of movement of load ratio bridging switch, measurement switching time etc..
The conventional test methodologies of above-mentioned two pilot project use split type test method, that is, use a transformer dc
Resistance meter and a transformer on-load tap changer tester difference wiring and test, because being two independent instruments,
Every instrument is provided with dedicated p-wire, this, which just needs to separate to test, separates wiring, especially when selecting single-phase straight resistance, it is necessary to
Frequently change the mode of connection, wiring work of taking out stitches will waste a large amount of human and material resources and working hour, and conventional straight resistance test and have load to open
It closes the two kinds of instruments tested and used when in use, needs 3-4 people to operate and at least wiring could test out two seed ginsengs respectively twice
Number, it is time-consuming and laborious.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, technical problem to be solved are as follows: provides a kind of transformation
Device D.C. resistance and load ratio bridging switch comprehensive test device；In order to solve the above-mentioned technical problem, the technical side that the present invention uses
Case are as follows: DCR of Transformer and load ratio bridging switch comprehensive test device, including cabinet, the front of the cabinet are provided with
LED display, control button；
The side of the cabinet is provided with Hi-pot test port, low voltage experiment port, the other side of cabinet be provided with power module,
Data communication module and constant current source module；
The cabinet is internally provided with control circuit board, and central controller, the center are integrated in the control circuit board
Controller is connected with LED display, control button, data communication module, constant current source module respectively by conducting wire；
The power input of the central controller is connected with power module；
The data communication module is specially wireless communication module, and the data communication module passes through wireless network and wireless temperature
Probe is connected；
The Hi-pot test port, low voltage experiment port are connected after concatenating AD conversion module respectively with central controller；
The central controller is also connected with data memory module.
The data communication module is also connected with monitor terminal.
The circuit structure of the power module is that the power module is internally provided with exchange and turns DC Module, the module
Ac input end be sequentially connected in series fuse, be connected after thermistor with the zero line of alternating current；
Described exchange turns the output end of DC Module successively shunt-wound capacitance C1, there is electrode capacitance C2, zener diode TVS1, resistance RL
It is connected afterwards with the output end of power module.
The chip that the constant current source module uses is amplifier U1, the circuit structure of the constant current source module are as follows:
One end of the 2 foot shunt-wound capacitance C13 of the amplifier U1 is connected behind one end of resistance R13 with one end of resistance R4；It is described
3 feet of amplifier U1 are connected with one end of resistance R5, defeated with power supply behind one end of the other end shunt-wound capacitance C12 of the resistance R5
Enter end to be connected；
The other end of the 6 foot shunt-wound capacitance C13 of the amplifier U1 is connected after the other end of resistance R13 with one end of resistance R6；
It is connected behind one end of the other end shunt-wound capacitance C15 of the resistance R6 with the grid of field-effect tube Q1, the field-effect tube
The source electrode of Q1 is connected with 40V input power, the output after the drain electrode series resistor R16 of the field-effect tube Q1 with constant current source module
End is connected.
The inside of the constant current source module is additionally provided with constant-current source gear control module, and carries out gear by control button
Control；
The chip that the constant-current source gear control module uses is potentiometer U2, the circuit knot of the constant-current source gear control module
Structure are as follows:
1 foot, 2 feet, 7 feet of the potentiometer U2 are connected with central controller respectively；
3 feet of the potentiometer U2 successively and connect 4 feet of potentiometer U2, and there are the cathode of electrode capacitance E2, capacitor in one end of capacitor C4
There is the anode of electrode capacitance E1 in one end of C3, is grounded after the cathode of zener diode T1；
5 feet of the potentiometer U2 are simultaneously connected after connecing the cathode of diode D1 with one end of resistance R2, and the resistance R2's is another
Termination power input terminal；
6 feet of the potentiometer U2 and the other end of connecting resistance C3, the anode of diode D1 have the cathode of electrode capacitance E1, pressure stabilizing
It is connected after the anode of diode T1 with one end of resistance R1, another termination -9V power input of the resistance R1；
It is connected after the other end of the 8 foot shunt-wound capacitance C4 of the potentiometer U2 with there is the anode of electrode capacitance E2.
The front-end circuit of the AD conversion module is provided with signal condition and filter module, what the AD conversion module used
Control chip is amplifier U3, the circuit structure of the AD conversion module are as follows:
It is connected behind 2 feet of the amplifier U3 and one end of connecting resistance R23 with one end of resistance R24, the resistance R23's is another
End ground connection；
It is connected behind one end of the 3 foot shunt-wound capacitance C65 of the amplifier U3 with one end of resistance R8, the other end of the resistance R8
It is connected with test port；
One end of the 4 foot shunt-wound capacitance C34 of the amplifier U3 is connected behind one end of capacitor C52 with -15V input power, described
It is grounded after the other end of the other end shunt-wound capacitance C52 of capacitor C34；
It is connected after 6 feet of the amplifier U3 and the other end of connecting resistance R24 with one end of resistance R30, the resistance R30's is another
It is connected behind one end of one end shunt-wound capacitance C68 with signal condition and filter module output end；
One end of the 7 foot shunt-wound capacitance C33 of the amplifier U3 is connected behind one end of capacitor C51 with 15V input power, described
It is grounded after the other end of the other end shunt-wound capacitance C51 of capacitor C33.
The chip that the data memory module uses is storage chip U4, the circuit structure of the data memory module are as follows:
5 feet, 6 feet of the pin-saving chip U4 are connected with central controller；
8 feet of the pin-saving chip U4 are simultaneously connected after connecing the anode of battery BT1 with one end of capacitor C30；
The other end of the 9 foot shunt-wound capacitance C30 of the pin-saving chip U4 is grounded after the cathode of battery BT1；
10 feet of the pin-saving chip U4 are connected with one end of crystal oscillator X2；
11 feet of the pin-saving chip U4 are connected with the other end of crystal oscillator X2；
It is connected after the 12 foot series resistor R22 of the pin-saving chip U4 with 3.3V input power；
It is connected after the 13 foot series resistor R21 of the pin-saving chip U4 with 3.3V input power；
14 feet of the pin-saving chip U4 are connected with 3.3V input power.
The model OP184 of the amplifier U1；The model X9C103 of potentiometer U2；The model of amplifier U3
OP1177；The model FM31L272 of pin-saving chip U4.
What the present invention had compared with the existing technology has the beneficial effect that the present invention, can be simultaneously by research and development a set of equipment
It completes DCR of Transformer test and load ratio bridging switch test job is not required in the test process of two inspection items
P-wire is frequently disconnected, to improve working efficiency；Multifunction module is integrated in one by test device provided by the invention
Compact-sized in a cabinet, light-weight, strong antijamming capability can complete DCR of Transformer and load ratio bridging switch
Test, and primary connection is only needed, two can be fast and accurately completed by the operating mode handoff functionality of box house
The test of pilot project；Apply the present invention in current transformer routine test, can overcome in current test job and test
The more problem of test point reduces wiring and takes out stitches operation, fundamentally reduces the labor intensity of testing crew, shortens when testing
Between.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of cabinet of the present invention；
Fig. 2 is electrical block diagram of the invention；
Fig. 3 is the circuit diagram of power module of the present invention；
Fig. 4 is the circuit diagram of constant current source module of the present invention；
Fig. 5 is the gear control module circuit diagram of constant current source module of the present invention；
Fig. 6 is the circuit diagram of AD conversion module of the present invention；
Fig. 7 is the circuit diagram of data memory module of the present invention；
In figure: 1 being cabinet, 2 be LED display, 3 be control button, 4 be Hi-pot test port, 5 be low voltage experiment port, 6 be
Power module, 7 be data communication module, 8 be constant current source module, 9 be central controller, 10 be wireless temperature probe, 11 be AD
Conversion module, 12 be data memory module, 13 be monitor terminal.
Specific embodiment
As shown in Figures 1 to 7, DCR of Transformer of the present invention and load ratio bridging switch comprehensive test device, including case
Body 1, the front of the cabinet 1 are provided with LED display 2, control button 3；
The side of the cabinet 1 is provided with Hi-pot test port 4, low voltage experiment port 5, and the other side of cabinet 1 is provided with power supply
Module 6, data communication module 7 and constant current source module 8；
The cabinet 1 is internally provided with control circuit board, is integrated with central controller 9 in the control circuit board, it is described in
Centre controller 9 is connected with LED display 2, control button 3, data communication module 7, constant current source module 8 respectively by conducting wire；
The power input of the central controller 9 is connected with power module 6；
The data communication module 7 is specially wireless communication module, and the data communication module 7 passes through wireless network and wireless temperature
Degree probe 10 is connected；
The Hi-pot test port 4, low voltage experiment port 5 are connected after concatenating AD conversion module 11 respectively with central controller 9；
The central controller 9 is also connected with data memory module 12.
The data communication module 7 is also connected with monitor terminal 13.
The circuit structure of the power module 6 is that the power module 6 is internally provided with exchange and turns DC Module, the mould
The ac input end of block is sequentially connected in series fuse, is connected after thermistor with the zero line of alternating current；
Described exchange turns the output end of DC Module successively shunt-wound capacitance C1, there is electrode capacitance C2, zener diode TVS1, resistance RL
It is connected afterwards with the output end of power module 6.
The chip that the constant current source module 8 uses is amplifier U1, the circuit structure of the constant current source module 8 are as follows:
One end of the 2 foot shunt-wound capacitance C13 of the amplifier U1 is connected behind one end of resistance R13 with one end of resistance R4；It is described
3 feet of amplifier U1 are connected with one end of resistance R5, defeated with power supply behind one end of the other end shunt-wound capacitance C12 of the resistance R5
Enter end to be connected；
The other end of the 6 foot shunt-wound capacitance C13 of the amplifier U1 is connected after the other end of resistance R13 with one end of resistance R6；
It is connected behind one end of the other end shunt-wound capacitance C15 of the resistance R6 with the grid of field-effect tube Q1, the field-effect tube
The source electrode of Q1 is connected with 40V input power, defeated with constant current source module 8 after the drain electrode series resistor R16 of the field-effect tube Q1
Outlet is connected.
The inside of the constant current source module 8 is additionally provided with constant-current source gear control module, and carries out shelves by control button 3
Position control；
The chip that the constant-current source gear control module uses is potentiometer U2, the circuit knot of the constant-current source gear control module
Structure are as follows:
1 foot, 2 feet, 7 feet of the potentiometer U2 are connected with central controller 9 respectively；
3 feet of the potentiometer U2 successively and connect 4 feet of potentiometer U2, and there are the cathode of electrode capacitance E2, capacitor in one end of capacitor C4
There is the anode of electrode capacitance E1 in one end of C3, is grounded after the cathode of zener diode T1；
5 feet of the potentiometer U2 are simultaneously connected after connecing the cathode of diode D1 with one end of resistance R2, and the resistance R2's is another
Termination power input terminal；
6 feet of the potentiometer U2 and the other end of connecting resistance C3, the anode of diode D1 have the cathode of electrode capacitance E1, pressure stabilizing
It is connected after the anode of diode T1 with one end of resistance R1, another termination -9V power input of the resistance R1；
It is connected after the other end of the 8 foot shunt-wound capacitance C4 of the potentiometer U2 with there is the anode of electrode capacitance E2.
The front-end circuit of the AD conversion module 11 is provided with signal condition and filter module, and the AD conversion module 11 makes
Control chip is amplifier U3, the circuit structure of the AD conversion module 11 are as follows:
It is connected behind 2 feet of the amplifier U3 and one end of connecting resistance R23 with one end of resistance R24, the resistance R23's is another
End ground connection；
It is connected behind one end of the 3 foot shunt-wound capacitance C65 of the amplifier U3 with one end of resistance R8, the other end of the resistance R8
It is connected with test port；
One end of the 4 foot shunt-wound capacitance C34 of the amplifier U3 is connected behind one end of capacitor C52 with -15V input power, described
It is grounded after the other end of the other end shunt-wound capacitance C52 of capacitor C34；
It is connected after 6 feet of the amplifier U3 and the other end of connecting resistance R24 with one end of resistance R30, the resistance R30's is another
It is connected behind one end of one end shunt-wound capacitance C68 with signal condition and filter module output end；
One end of the 7 foot shunt-wound capacitance C33 of the amplifier U3 is connected behind one end of capacitor C51 with 15V input power, described
It is grounded after the other end of the other end shunt-wound capacitance C51 of capacitor C33.
The chip that the data memory module 12 uses is storage chip U4, the circuit structure of the data memory module 12
Are as follows:
5 feet, 6 feet of the pin-saving chip U4 are connected with central controller 9；
8 feet of the pin-saving chip U4 are simultaneously connected after connecing the anode of battery BT1 with one end of capacitor C30；
The other end of the 9 foot shunt-wound capacitance C30 of the pin-saving chip U4 is grounded after the cathode of battery BT1；
10 feet of the pin-saving chip U4 are connected with one end of crystal oscillator X2；
11 feet of the pin-saving chip U4 are connected with the other end of crystal oscillator X2；
It is connected after the 12 foot series resistor R22 of the pin-saving chip U4 with 3.3V input power；
It is connected after the 13 foot series resistor R21 of the pin-saving chip U4 with 3.3V input power；
14 feet of the pin-saving chip U4 are connected with 3.3V input power.
The model OP184 of the amplifier U1；The model X9C103 of potentiometer U2；The model of amplifier U3
OP1177；The model FM31L272 of pin-saving chip U4.
The present invention is output constant current based on D.C. resistance test and the test of direct current method load ratio bridging switch in design
Source, and have common place in wiring, i.e., the high-pressure side port A/B/C/O is all connected on instrument (direct resistance metering simultaneously
Using triple channel with method of surveying, it is therefore desirable to which all separate wholes are connected on instrument), therefore two kinds of test equipments can be combined
It carries out for an instrument using in the design process, needing accurately to calculate component parameter, reasonable disposition component is designed
Sample processing unit needed for two kinds of tests, and each unit module is subjected to integrated installation, it completes the production.
The cabinet 1 that the present invention designs uses all aluminium alloy structure, and control button 3 is specially embedded key and shuttle knob
The structure combined, signal output slab use same terminal block；In terms of built-in control system, in addition to independent test direct current
Resistance and two kinds of parameters of load ratio bridging switch should also introduce " key measurement " concept in terms of testing straight resistance, i.e. setting primary parameter
Instrument is automatically performed all winding resistance values of transformer high-low-voltage, can more be further reduced the testing time in this way；During the test,
It can also pop one's head in wireless temperature and establish connection, realize the real-time measurement to transformer temperature and refer to.
The present invention designs the test equipment for integrating two kinds of functions, and cabinet metal structure can reach jamproof work
With analysis waveform when knob design helps to carry test, key measurement can save the plenty of time, and wireless temperature measurement can monitor in real time
Temperature data meets the measurement accuracy and anti-interference ability requirement of test device.
The power module 6 that the present invention designs has carried out effective filtering and design protection to the input and output side of power supply,
Reduce ripple, the noise jamming of power-supply system, it can be ensured that it is defeated to provide a set of completely stable power supply to entire test macro
Out.
The constant current source module 8 can be to direct resistance metering and the constant-current source for having load test offer stable, and the present invention is to constant current
Design is optimized in source, guarantee constant-current source it is stable, noise is small, it is with high accuracy on the basis of, improve response speed and stabilization
Degree, it is ensured that the data that two kinds of tests obtain are accurately quick.
Sampling system requires 9 pairs of central controller acquisition data to carry out the processing of efficient stable, and the present invention is using model
The synchronized sampling chip of AD7606 has 16 8 channels, carries out data acquisition to measurement result, it is ensured that the stabilization of DATA REASONING
Property, reliability, high efficiency.
The external wireless temperature probe 10 of the present invention uses model DS18B20 temperature sensor chip, and chip waterproof is anti-
Tide is encapsulated by stainless steel tube, easy to install and use, and is given the temperature data real-time Transmission of monitoring using wireless communication module and surveyed
Test instrument.
Large capacity FeRAM memory chip FM31L272 is used inside the data memory module 12, it is ensured that measurement data
Real-time preservation, chip carries watchdog circuit, it is ensured that the reliability of instrument overall operation.
D.C. resistance test provided by the invention is as follows with the technical parameter of load ratio bridging switch parameter test device:
Straight resistance measurement test current requirements parameter are as follows: three-phase test: 5A+5A, 1A+1A, two grades optional；Split-phase test: 10A,
5A, 1A, third gear are optional；
Test scope:
The Ω of 10A:1.000m Ω ~ 1；
5A:10.00m Ω ~ 4 Ω, 5A+5A, 10m Ω ~ 1 Ω；
1A:100.0m Ω ~ 20 Ω, 1A+1A, 100m Ω ~ 5 Ω；
Minimum resolution: 0.1u Ω
Accuracy: ± (0.2%+2 word)
Load ratio bridging switch test parameter are as follows: output electric current: 1.0A, 0.5A, 0.3A, third gear are optional；
Resistance range: 0.1~10 Ω at 1.0A grades；5~20 Ω at 0.5A grades；10~40 Ω at 0.3A grades；
Resistance measurement precision: ± (reading × 5%+5 word), resolution ratio: 0.01 Ω；
Transit time measurement range: 1~250mS；
Transit time measurement accuracy: ± 1mS, resolution ratio: 0.1mS；
Sample frequency is 10KHz.
This test macro passes through installation settings signal processing acquisition processing module, stable constant current source module, multi-functional switching
Module, high-precision AD sampling module realize two parts test function；Wherein high stable constant current source circuit can produce for direct current
Three road constant-current sources of resistance measurement and load ratio bridging switch test；(the straight resistance of different signal samplings can be switched in multifunctional switching circuit
Load high-speed sampling is sampled and had at a slow speed)；High-precision AD sampling module converts analog signals into digital signal, passes through 32 centers
Processor is handled, thus various test parameters needed for calculating；The present invention is designed using integral structure, carries out two inspections
When the test of survey project, it is only necessary to disposably p-wire be connected, then accordingly tested by human-computer interaction module selection
The test of all items can be completed in project.
Embodiment:
Existing substation is tested using the present invention, test data is as follows:
It is tested in 110kV substation 2# main transformer, the transformer parameter on November 12nd, 2018 are as follows:
Model: SSZ11-50000/110；
Voltage rating: (110 ± 8X1.25%)/38.5 ± 2X2.5%/10.5kV；
Rated capacity: 50000kVA；
Factory number: 201509-0005；
The date of production: 2015.12；
On-the-spot test situation is as follows:
Time: on November 12nd, 2018；
Place: 110kV substation；
Equipment: transformer；
Device model: SSZ11-50000/110；
Equipment state: have a power failure；
Test case: transformer and switch are carried out respectively using instrument for measuring DC resistance and on-load tap changer tester first
Then test is tested using the straight resistance that the present invention develops added with two-in-one instrument is carried, test case is as follows:
Testing time is as follows:
Direct resistance metering instrument 35 divides 10 seconds；
On-load tap changer tester 25 divides 50 seconds；
Straight resistance divides 33 seconds added with two-in-one device 40 is carried；
Conclusion: using apparatus of the present invention measurement result, accurate, two parts test experiments are combined into a part, save the plenty of time.
In above-mentioned transformer directly hinders and loaded switch is tested, tester is reduced to 2 people by original personnel 3-4 people,
Testing time is reduced to 40 points for 00 second 33 seconds by 61 points.
Therefore it is surveyed it can be concluded that substituting traditional direct resistance metering device and loaded switch using test device of the present invention
Trial assembly is set, and can effectively improve the accuracy of testing result, the time of measuring of reduction.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. DCR of Transformer and load ratio bridging switch comprehensive test device, it is characterised in that: including cabinet (1), the case
The front of body (1) is provided with LED display (2), control button (3)；
The side of the cabinet (1) is provided with Hi-pot test port (4), low voltage experiment port (5), and the other side of cabinet (1) is set
It is equipped with power module (6), data communication module (7) and constant current source module (8)；
The cabinet (1) is internally provided with control circuit board, and central controller (9), institute are integrated in the control circuit board
State central controller (9) by conducting wire respectively with LED display (2), control button (3), data communication module (7), constant-current source
Module (8) is connected；
The power input of the central controller (9) is connected with power module (6)；
The data communication module (7) is specially wireless communication module, and the data communication module (7) passes through wireless network and nothing
Line temp probe (10) is connected；
The Hi-pot test port (4), low voltage experiment port (5) concatenate AD conversion module (11) afterwards and central controller respectively
(9) it is connected；
The central controller (9) is also connected with data memory module (12).
2. DCR of Transformer according to claim 1 and load ratio bridging switch comprehensive test device, it is characterised in that:
The data communication module (7) is also connected with monitor terminal (13).
3. DCR of Transformer according to claim 2 and load ratio bridging switch comprehensive test device, it is characterised in that:
The circuit structure of the power module (6) is that the power module (6) is internally provided with exchange and turns DC Module, the module
Ac input end is sequentially connected in series fuse, is connected after thermistor with the zero line of alternating current；
Described exchange turns the output end of DC Module successively shunt-wound capacitance C1, there is electrode capacitance C2, zener diode TVS1, resistance RL
It is connected afterwards with the output end of power module (6).
4. DCR of Transformer according to claim 3 and load ratio bridging switch comprehensive test device, it is characterised in that:
The chip that the constant current source module (8) uses is amplifier U1, the circuit structure of the constant current source module (8) are as follows:
One end of the 2 foot shunt-wound capacitance C13 of the amplifier U1 is connected behind one end of resistance R13 with one end of resistance R4；It is described
3 feet of amplifier U1 are connected with one end of resistance R5, defeated with power supply behind one end of the other end shunt-wound capacitance C12 of the resistance R5
Enter end to be connected；
The other end of the 6 foot shunt-wound capacitance C13 of the amplifier U1 is connected after the other end of resistance R13 with one end of resistance R6；
It is connected behind one end of the other end shunt-wound capacitance C15 of the resistance R6 with the grid of field-effect tube Q1, the field-effect tube
The source electrode of Q1 is connected with 40V input power, after the drain electrode series resistor R16 of the field-effect tube Q1 with constant current source module (8)
Output end is connected.
5. DCR of Transformer according to claim 4 and load ratio bridging switch comprehensive test device, it is characterised in that:
The inside of the constant current source module (8) is additionally provided with constant-current source gear control module, and carries out gear control by control button (3)
System；
The chip that the constant-current source gear control module uses is potentiometer U2, the circuit knot of the constant-current source gear control module
Structure are as follows:
1 foot, 2 feet, 7 feet of the potentiometer U2 are connected with central controller (9) respectively；
3 feet of the potentiometer U2 successively and connect 4 feet of potentiometer U2, and there are the cathode of electrode capacitance E2, capacitor in one end of capacitor C4
There is the anode of electrode capacitance E1 in one end of C3, is grounded after the cathode of zener diode T1；
5 feet of the potentiometer U2 are simultaneously connected after connecing the cathode of diode D1 with one end of resistance R2, and the resistance R2's is another
Termination power input terminal；
6 feet of the potentiometer U2 and the other end of connecting resistance C3, the anode of diode D1 have the cathode of electrode capacitance E1, pressure stabilizing
It is connected after the anode of diode T1 with one end of resistance R1, another termination -9V power input of the resistance R1；
It is connected after the other end of the 8 foot shunt-wound capacitance C4 of the potentiometer U2 with there is the anode of electrode capacitance E2.
6. DCR of Transformer according to claim 5 and load ratio bridging switch comprehensive test device, it is characterised in that:
The front-end circuit of the AD conversion module (11) is provided with signal condition and filter module, what the AD conversion module (11) used
Control chip is amplifier U3, the circuit structure of the AD conversion module (11) are as follows:
It is connected behind 2 feet of the amplifier U3 and one end of connecting resistance R23 with one end of resistance R24, the resistance R23's is another
End ground connection；
It is connected behind one end of the 3 foot shunt-wound capacitance C65 of the amplifier U3 with one end of resistance R8, the other end of the resistance R8
It is connected with test port；
One end of the 4 foot shunt-wound capacitance C34 of the amplifier U3 is connected behind one end of capacitor C52 with -15V input power, described
It is grounded after the other end of the other end shunt-wound capacitance C52 of capacitor C34；
It is connected after 6 feet of the amplifier U3 and the other end of connecting resistance R24 with one end of resistance R30, the resistance R30's is another
It is connected behind one end of one end shunt-wound capacitance C68 with signal condition and filter module output end；
One end of the 7 foot shunt-wound capacitance C33 of the amplifier U3 is connected behind one end of capacitor C51 with 15V input power, described
It is grounded after the other end of the other end shunt-wound capacitance C51 of capacitor C33.
7. DCR of Transformer according to claim 6 and load ratio bridging switch comprehensive test device, it is characterised in that:
The chip that the data memory module (12) uses is storage chip U4, the circuit structure of the data memory module (12) are as follows:
5 feet, 6 feet of the pin-saving chip U4 are connected with central controller (9)；
8 feet of the pin-saving chip U4 are simultaneously connected after connecing the anode of battery BT1 with one end of capacitor C30；
The other end of the 9 foot shunt-wound capacitance C30 of the pin-saving chip U4 is grounded after the cathode of battery BT1；
10 feet of the pin-saving chip U4 are connected with one end of crystal oscillator X2；
11 feet of the pin-saving chip U4 are connected with the other end of crystal oscillator X2；
It is connected after the 12 foot series resistor R22 of the pin-saving chip U4 with 3.3V input power；
It is connected after the 13 foot series resistor R21 of the pin-saving chip U4 with 3.3V input power；
14 feet of the pin-saving chip U4 are connected with 3.3V input power.
8. DCR of Transformer according to claim 7 and load ratio bridging switch comprehensive test device, it is characterised in that:
The model OP184 of the amplifier U1；The model X9C103 of potentiometer U2；The model OP1177 of amplifier U3；Data
The model FM31L272 of storage chip U4.
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| CN201910060355.2A CN109709481A (en) | 2019-01-22 | 2019-01-22 | DCR of Transformer and load ratio bridging switch comprehensive test device |
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| CN201910060355.2A CN109709481A (en) | 2019-01-22 | 2019-01-22 | DCR of Transformer and load ratio bridging switch comprehensive test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456160A (en) * | 2019-08-20 | 2019-11-15 | 保定市森茂科技有限公司 | Super-pressure three-phase transformer D.C. resistance test method and test device |
| CN110609228A (en) * | 2019-09-17 | 2019-12-24 | 国网河北省电力有限公司 | Fault detection and calibration device for on-load tap changer of power transformer |
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| CN203849337U (en) * | 2014-04-04 | 2014-09-24 | 国家电网公司 | Comprehensive multifunctional transformer testing device |
| CN204255995U (en) * | 2014-12-11 | 2015-04-08 | 国家电网公司 | The test port of insulation resistance meter and the syndeton of p-wire |
| CN105807217A (en) * | 2016-03-14 | 2016-07-27 | 国网浙江宁波市鄞州区供电公司 | Transformer direct-current resistance and on-load tap-changer integrated tester |
| CN209803292U (en) * | 2019-01-22 | 2019-12-17 | 国网山西省电力公司长治供电公司 | transformer direct-current resistance and on-load tap-changer comprehensive test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2304131Y (en) * | 1997-07-15 | 1999-01-13 | 山西省电力公司运城供电公司 | Comprehensive detecting instrument for loaded tap-switch characteristics of electric transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110456160A (en) * | 2019-08-20 | 2019-11-15 | 保定市森茂科技有限公司 | Super-pressure three-phase transformer D.C. resistance test method and test device |
| CN110456160B (en) * | 2019-08-20 | 2021-11-30 | 保定市森茂科技有限公司 | Method and device for testing direct current resistance of ultrahigh voltage three-phase transformer |
| CN110609228A (en) * | 2019-09-17 | 2019-12-24 | 国网河北省电力有限公司 | Fault detection and calibration device for on-load tap changer of power transformer |
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