Ensure Insulation and Withstand Voltage with Contact Check
The AC Automatic Insulation/Withstanding Tester 3174 is a low-cost solution featuring contact check functionality as well as a stabilized power supply to prevent the reduced test reliability that can result from these issues. Key Features • Continuous testing of insulation (500/1000 V) and withstand voltage (100 VA transformer capacity) • Full remote operation when used in combination with the Safety Test Data Management Software 9267 • Save up to 8 test settings each for the withstanding and insulation testing modes • Precise test voltage without power voltage dependency is generated using the PWM method

Model No. (Order Code)


Note: To perform contact checks, please purchase another High Voltage Test Lead 9615 set separately.


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

[Withstanding test section] 
Testing voltage0.2 V AC to 5.00 kV AC
Voltage settingDigital setting, Setting resolution: 0.01 kV
Waveform/FrequencySine wave (Distortion ratio 5 % or less at no load), 50/60 Hz selectable
Current measurement0.01 mA to 20.0 mA, True RMS rectified (digital display)
Measurement range10 mA (0.01 mA resolution), 20 mA (0.1 mA resolution)
Voltage meterAccuracy: ±1.5 % rdg. (1000 V or more), ±15 V (less than 1000 V), True RMS rectified
Judgment functionWindow comparator method (Digital setting)
[Insulation test section] 
Testing voltage500 V DC, 1000 V DC
Unloaded voltage1 to 1.2 times rated voltage
Rated testing current1 to 1.2 mA, Shorted current: 4 to 5 mA (at 500 V), 2 to 3 mA (at 1000 V)
Measurement range, Accuracy0.5 MΩ to 999 MΩ (at 500 V), and 1 MΩ to 999 MΩ (at 1000 V): ±4 % rdg.,
1000 MΩ to 2000 MΩ: ±8 % rdg.
Judgment functionWindow comparator method (Digital setting)
[Timer section]*Test times may differ from set timer times depending on the load.
Setting range0.3 to 999 s
Ramp, DelayTesting voltage ramp-up, or down, Insulation test delay: 0.1 to 99.9 s
[General section] 
FunctionsSaving 8 testing conditions, hold, buzzer, contact check
Monitor functionOutput voltage, detected current, insulation resistance, Refresh rate: 2 times/s
Power supply100 to 240 V AC, (50/60 Hz), 200 VA max.
Dimensions and mass320 mm (12.60 in)W × 155 mm (6.10 in)H × 395 mm (15.55 in)D, 15 kg (529.1 oz)
AccessoriesH.V. Test lead 9615 (high voltage side and return, 1 each) ×1, Power cord ×1, Instruction manual ×1, Disconnection prevention plate ×1


Catalog: INSULATION / WITHSTANDING Test Instrument series 3153, 3159, 3174, ST5520

Catalog: Motor Measurement Applications

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