Transformer volt ampere characteristic transformation ratio polarity comprehensive tester

Transformer volt ampere characteristic transformation ratio polarity comprehensive testerIt is based on traditional methods such as voltage regulators, boosters, and flow regulatorsTransformer volt ampere characteristic transformation ratio polarity comprehensive testerOn the basis of extensive listening to user opinions, extensive market research, and in-depth theoretical research, a new generation of CT and PT testing instruments have been developed. The comprehensive characteristic tester for transformers adopts high-performance DSP and FPGA manufacturing processes, ensuring stable and reliable product performance, complete functions, high degree of automation, and high testing efficiency. It is a professional testing instrument for transformers in the power industry.

One Technical specifications
Input voltage: AC 220V or 380V, 50HZ, automatic recognition input voltage.
2. Working environment temperature: 0~40 ℃.
3. Input voltage: When input AC 220V, output 0-500V.
When the input AC voltage is 380V, the output ranges from 0 to 1000.
Current: * Large instantaneous current, 600A when measuring transformation ratio.
When input AC 220V, output 0-400A.
When the input AC voltage is 380V, the output is 0-600A.
The volt ampere characteristic test was conducted at 15A.
4. Digital voltmeter measurement range: 0-9999V; resolution: 0.1V.
When displaying current: 0-9.9A; resolution: 0.1mA.
5. Measurement range of digital ammeter: 0~3000A; resolution: 0.01A.
Error: 1 ≤ 1%, U≤1%。
When measuring CT transformation ratio, the transformation ratio can be automatically calculated, and the data and calculation results can be printed.
When measuring the volt ampere characteristics, store and print 20 sets of current voltage values and volt ampere characteristic curves.
9. Dimensions: Length x Width x Height=470 x 340 x 260mm3.
Weight: 23Kg.
Notes:
The secondary coil of the current transformer should not have a grounding point.
2. The regulator switch and output switch can be wired and disconnected in the direction of the disconnected position.
Before the experiment, this device should be reliably grounded.
After completing the experiment, it should be promptly reset to zero, and it is strictly prohibited to stay for a long time under high voltage and high current.
3、 Panel Diagram and Explanation (Figure 1)
1. Voltage acquisition input terminal, connected to the AC output remote end, connected to the CT secondary side.
2 AC current output, connected to the CT secondary side.
3 regulator output fuse (15A).
4. Voltage regulator output switch.
5 Boost control handle.
6 Four digit LCD screen current display (V) [CT secondary side current display for variable ratio testing].
7-digit LCD screen current display (A) [CT primary side current display for variable ratio testing].
8 printers.
9 Data reset button.
10 storage data button.
11 Print button.
12 Reset indicator light.
13 Storage indicator light.
Connect the CT secondary side to the 14 variable ratio current input.
Connect the primary side of CT to the 15 variable ratio current output.
16 volt ampere characteristic test and transformation ratio test conversion switch.
17 polarity discrimination input connected to CT secondary side.
18 polarity discrimination output connected to CT primary side.
19 polarity discrimination current display meter, zero position when not tested.
Press the 20 polarity discrimination on/off button once to turn it on, release it to turn it off.
21 grounding socket.
22 whole machine insurance (1A).
23 power sockets.
24 machine power switch.
25 external sensor interface, external primary current input terminal.
4、 Usage:
Voltage current characteristic test:
The wiring is shown in the following figure: (Figure 2)
Users should select the appropriate input voltage based on the volt ampere characteristics of the tested equipment. When a voltage of 500V or higher is required, a voltage of 380V should be input.
2. Ensure the instrument is reliably grounded.
3. Check that the current transformer has no grounding point.
4. Turn switch "16" to the volt ampere range.
5. Connect the instrument output and voltage measurement to the secondary side of the current transformer (as shown in Figure 2).
Check if the voltage regulator is reset to zero, turn on the "24" switch, press the reset button once, the indicator light above it will light up, and the microprocessor will be in a waiting storage state.
7. Turn on output switch 4 and slowly rotate the regulator clockwise. When storage is required, press the storage button once. The indicator light above the storage button will light up and the internal buzzer will sound. (Note: It is not allowed to adjust the voltage regulator during each measurement process, and the dwell time when adjusting to high current should be as short as possible.)
Up to 20 sets of current and voltage values can be stored.
9. After storage, adjust the base note voltage regulator to zero.
Press the print button once to print out the test data and volt ampere characteristic dot matrix diagram. Electricity * * is divided into three ranges, and the range selection is in automatic mode. A range is automatically selected based on the maximum value of the sampling voltage *:
0199V represents 10V per grid
200V499V per grid represents 25V
500V2000V per grid represents 50V
The current axis is divided into two ranges, and the range selection is in automatic mode. A range is automatically selected based on the sampling current multiplied by the maximum value.
07A represents 0.25V per grid
7A40A represents 0.5A per grid
Press the reset button once to reset and repeat the test.
After the experiment is completed, disconnect the "4" switch and the "24" switch, and unplug the connecting wire.