Impulse Winding Tester 7710 (10000V)

Specifications

Model	7710	7720	7703	7713
Test Channel	2	8	2	2
Impulse Voltage	200V-10000V	200V-5000V	100V-5000V	200V-10000V
Lowest Inductance	100uH	50uH	0.5uH	0.5uH
HARM analysis	–	–	●	●
HFLT analysis	–	–	●	●

SPEC

Model	7710
Test Channel	2
Impulse Voltage	200V-10000V (programmable )
Impulse Voltage Accuracy	±2%
Lowest Inductance	100uH
Measurement Time	50mS
Provides 5 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.
Wave comparison	Set a acceptable wave range, if the DUT’s wave is in this range shows “pass” otherwise, “fail” This parameter can judge both amplitude and phase of resonance wave. This can increase the detection capability of layer short.
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.
Flat comparison	If the layer short happened, the waveform will tremble. Therefore, the instrument will quantize and compared it.

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
Power Supply	Frequency：50/60Hz ±5%
Power consumption	300VA
Environment	Temperature：10℃-40℃
Environment	Humidity：20-90%RH
Dimension	435x145x522 mm (WHD)
Weight	8 Kg
Interface	RS-232、Remote、Printer
Display	5.7″ dot-matrix (300*240 )

MICROTEST 7710 is a Impulse Winding Tester that provides pulse voltage outputs ranging from 200V to 10000V. It utilizes damping attenuation waveforms generated by L/C resonance to analyze magnetic components for defects such as short circuits between coils or between layers of winding wire. The tester offers various comparison modes, including total area comparison, area difference comparison, corona count comparison, jitter count comparison, and waveform comparison. These modes help identify and detect faulty products accurately.

Application
Low inductance coil
High power inductance
Transformer
Motor stator
Motor rotor
Winding component

L	is the DUT coil
C1, C2	are the resonant capacitors in the instrument
R1, R2, R3	is the resistant in the instrument and the DUT
Technology of Detect Layer Short
→ 1	Charge the C1 capacitor to the certain testing voltage level.
→ 2	Trigger the SCR by pulse
→ 3	DUT will resonate with C1 and C2

Impulse Winding Tester 7710 (10000V)