Hipot (high potential) testers verify the electrical insulation integrity of equipment and components by applying a high voltage and measuring leakage current, used to confirm products meet safety standards before they leave the production line or return to service. We stock AC, DC, and combination hipot testers for electrical safety compliance testing.

AC vs. DC Hipot Testing

AC hipot testers apply an alternating high voltage, testing insulation under conditions similar to normal operating stress, and are commonly required by safety standards for finished electrical products. DC hipot testers apply a steady high voltage and are often preferred for testing capacitive loads or cable insulation, since they avoid the charging current associated with AC testing on these devices.

Insulation Resistance & Leakage Current

Hipot testers monitor leakage current during the applied voltage test, with a pass/fail result based on whether leakage stays below a specified threshold, indicating the insulation can safely withstand the rated voltage without breakdown. Excessive leakage current signals a potential insulation defect that could pose a shock or fire hazard in the field.

Compliance Standards

Hipot testing is a required step in safety compliance programs such as UL, IEC 60601 (medical devices), and various product safety certifications, with required test voltage and duration specified by the applicable standard for the product being tested.

Common Applications

Production line electrical safety testing
Medical device electrical safety compliance
Appliance and consumer electronics safety testing
Cable and wire insulation verification
Repair and field service safety verification

Not sure which hipot tester fits your application? Contact our team — we can help match test voltage, AC/DC capability, and compliance features to your specific requirement.

Frequently Asked Questions

Should I use an AC or DC hipot tester?

AC hipot testing is commonly required by safety standards for finished electrical products, while DC hipot testing is often preferred for capacitive loads or cable insulation testing, since it avoids the charging current effects seen with AC.

What does a hipot test actually verify?

A hipot test verifies that a product’s insulation can safely withstand a specified high voltage without excessive leakage current, confirming the insulation barrier is intact and won’t fail under normal operating stress.

What test voltage do I need?

Required test voltage is typically specified by the safety standard applicable to your product (such as UL or IEC 60601), rather than being a user preference — check your specific compliance requirement before selecting a tester.

Do you provide calibration certificates for hipot testers?

Yes, select models are available with a NIST-traceable calibration certificate at the time of purchase. Look for the certification filter above or contact us for a custom calibration request.