MICROTEST 7750 Impulse Winding Tester
Features- Lowest Inductance (≥0.1μH)
- High voltage calibration
- programmable impulse voltage
- 200MHz/9bit High Impulse Test Sampling Rate
- Total Area Comparison
- Differential Area Comparison
- Corona Comparison
- LAPLACIAN Comparison
- Voltage Compensation Function
Specifications
Selection
Model
7750-1
7750-5
7750-10
Test Channel
single channel
Impulse Voltage
10V-1200V
100V-5200V
200V-10000V
Lowest Inductance
≥0.1μH
≥10μH
≥20μH
Voltage Resolution
0.1V
1V
5V
Voltage Accuracy
±（1% of setting ＋ 5V）
±（1% of setting ＋ 10V）
±（1% of setting ＋ 20V）
Pulse Energy
0.028 joule
0.5 joule
2 joule
SPEC
Model
7750
Sampling Rate
200MHz/9 bit
Pulse Number
Max. 32
Input Impedance
20MΩ
Measurement Statistics
●
Breakdown Voltage
●
Measurement Time
7 times/second
Provides 4 waveform comparison
Total area comparison
When layer short happened, the loss of power on coil increase, the resonance damping coefficient increase, resonance amplitude decrease, the total area decrease. These are the basic parameters we check layer short.
By calculating and comparing the deference of area between golden sample and DUT.
Show by percentage
Analysis the power loss by this data.
Differential area comparison
Add up the difference between normal wave and DUT wave call “ Area differential”.
When layer short happened, the inductance reduce(similar the transformer). The wave phase change and the area differential also change. This will show “fail” on the instrument.
However, the parameter might cause deviation because of the deviation of inductance, resonance phase shift. (Silicon steel product such as motor and traditional transformer is not suitable)
By calculating and comparing the deference of area between golden sample and DUT. To determine the degree of waveform overlap.
Compare the inductance by this.
Corona comparison
In pulse test, the insulation defect will cause discharge and create corona. This function is able to count the times that corona happened base on the degree of deviation.
Detect the discharge phenomenon on the coil.
LAPLACIAN Comparison
Use the second derivative to calculate the Laplacian value.
By the corona waveform of high-frequency to know more about the insulating property of products.
SYSTEM
PLC Remote Control
Test、About
PLC Remote Output Signal
PASS、FAIL、HV Output、Testing
Built-in Storage
200 sets testing waveform
Power Supply
Voltage：98Vac-132Vac 或192Vac-264Vac
Frequency：50/60Hz ±5%
Power consumption
300VA
Environment
Temperature：10℃-40℃
Humidity：20-90%RH
Dimension
435x145x522 mm (W*H*D)
Weight
8 Kg
Interface
RS-232、Remote、Printer
Display
5.7" dot-matrix (300*240 )
