HIOKI Impulse Winding Tester ST4030A

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The Hioki ST4030A impulse winding tester diagnoses rotor windings by quantifying response waveforms, crucial for electric vehicle motors. It detects layer shorts and single-turn faults using pass/fail plots based on master waveform comparisons. This surge tester integrates resistance and insulation-testing functions. Employing Hioki's original filtering minimizes noise, ensuring precise detection even in challenging conditions. Max voltage: 3300-4200 V AC.

Optional function for the ST4030A
DISCHARGE DETECTION UPGRADE ST9000
- Optional function for the ST4030A Impulse Winding Tester to detect microscopic partial discharges obscured by noise. Detect pseudo-shorts with high accuracy

Impulse Winding Tester

Model:

ST4030A

Maker:

HIOKI

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Brochure: IMPULSE-WINDING-TESTER-ST4030A

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)

How to Use the Hioki Impulse Winding Tester ST4030A

The ST4030A detects the existence of layer shorts between coil windings, defects that are found in motor inductors. By using a master waveform taken from a reference coil after applying an impulse voltage, and comparing it to the measured waveform across a specific interval of the coil under test, the resulting area difference can help determine pass or fail easily and accurately. In addition, quantification of response waveforms, a new method developed by Hioki, lets you detect even single-turn faults by using a pass/fail distribution plot. Watch this video to learn how to easily make settings and begin testing right away.

Specifications

Accuracy guaranteed: 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)
Included accessories	Power cord ×1, Instruction Manual ×1, Application disc ×1, Usage notes ×1

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