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IMPULSE WINDING TESTER ST4030A Electrical Safety Testers , Hipot, Insulation, Leakage Testers HIOKI


Diagnose the Insulation Quality and Deterioration of Rotor Windings while in Assembled State via Response Waveform Quantification

The ST4030A is an impulse winding tester, or surge tester, that combines the functions of both a resistance meter and insulation-withstand testing required for electric motor winding manufacturers to improve quality.  Meet the needs of more reliable motor windings in light of the increasing use of electric vehicles and self-driving technology.

Key Features
• Identify previously undetectable defects 
• Detect waveforms with high precision (200 MHz high speed sampling × high 12-bit resolution)
• Identify single-fault turns via quantification of response waveforms into LC and RC values
• Diagnose defective insulation (pseudo-shorts) between motor windings by testing for microscopic partial discharges hidden in noise (option)

Model No. (Order Code)


Note: The Discharge Detection Upgrade ST9000 is a factory option for the Impulse Winding Tester ST4030. Please specify at time of order.



Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Measurement items • Quantification (LC value, RC value) of the response waveform obtained when impulse voltage is applied, pass / fail judgment
• Waveform judgment using AREA value, Flutter, Laplacian etc.
• Equipped with dielectric breakdown voltage test function
Applied voltage 100 V to 4200 V (Setting resolution: 10 V steps)
Maximum applied energy: approx. 88 mJ
Testable inductance range 10 μH to 100 mH
Sampling 200 M / 100 M / 50 M / 20 M / 10 MHz, Resolution: 12 bits, Number of data: 1001 to 800 points (1000 point steps)
Voltage detection accuracy [DC accuracy] ± 5% of setting, [AC band] 100 kHz: ± 1 dB
Determination method LC · RC value judgment, waveform judgment, discharge judgment (when incorporating the ST9000)
Number of test condition tables 255 (test condition setting, judgment condition setting, master waveform)
Test time About 60 ms (3000 V, 1 pulse, reference value at decision OFF)
Display 8.4-inch SVGA color TFT liquid crystal (800 × 600 dots), touch panel
Interface Standard:  EXT.I/O, USB host (memory), USB device (communication), LAN
Optional:  RS-232C (Z3001), GP-IB (Z3000)
Power supply 100 V to 240 V AC, 50/60 Hz, 80 VA max.
Dimensions and mass 215 mm (8.46 in)W × 200 mm (7.87 in)H × 348 mm (13.7 in)D, 6.7 kg (236.3 oz)
Accessories Power cord ×1, Instruction Manual ×1, Application disc ×1, Usage notes ×1

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