Hipot / Insulation-resistance Tester
Test instrumentAutomatedSemi-automatic
End-of-line electrical safety tests.
✓ Expert reviewed All content on this page has been reviewed by a senior motor engineer.
Selection criteria
Output voltage, leakage-current resolution.
Supply chain
Shenzhen has domestic safety-tester makers and the offices of Taiwanese brands; East China makers have Dongguan offices. Make sure the tester is calibrated with traceability and supports the IEC 60034-1 test voltages your customers require.
Buyer FAQ
- What test voltage should I use?
- IEC 60034-1 type test for low-voltage motors is 1,000 V + 2 × rated voltage (minimum 1,500 V) AC for 1 minute. Production tests usually use a higher voltage (about +20 %) for 1 s instead. Customer and safety standards (e.g. IEC 60335 for appliances) may set other values.
- AC or DC hipot?
- AC hipot stresses the insulation the way the motor sees it in service and is the usual choice. DC hipot (about 1.414 × the AC value) is used when capacitive leakage is high, for example long cables or large windings.
- How do I keep hipot testing safe?
- Use an interlocked fixture or light curtain, automatic discharge after the test, a daily check with a calibration box or known-fail sample, and trained operators. Never connect by hand while high voltage is enabled.
Where it is used
Motor assembly process
- 57 mm Inner-rotor BLDC Motor11. End-of-line test
- 42 mm Two-phase Hybrid Stepper Motor (NEMA 17)11. End-of-line test
- 57 mm Two-phase Hybrid Stepper Motor (NEMA 23)11. End-of-line test
- 86 mm Two-phase Hybrid Stepper Motor (NEMA 34)12. End-of-line test
- 57 mm Integrated BLDC Motor (built-in driver)12. End-of-line test
- 70 mm Outer-rotor BLDC Motor12. End-of-line test
- AC Servo Motor (60–130 mm flange)7. Stator shrink-fit into housing, 13. End-of-line test
- Coreless Brushed DC Motor (16–22 mm)5. Rotor electrical test, 11. Run-in & end-of-line test
- IEC Three-phase Induction Motor (frames 80–160, IE3)12. Routine & efficiency test
- Linear Motor & Voice-coil Motor11. Electrical safety test
- Direct-drive Torque Motor & Robot Joint Module11. End-of-line test