Hi-Pot Test Voltage
V_test = 2 × V_working + 1000
Quick answer
This calculator solves V_test = 2 × V_working + 1000V for Test Voltage. With Working Voltage 26.4 V, the result is 1.053 kV. It solves in 2 directions, so you can enter the values you have and get the one you need.
Calculator
Formula
Description
Hipot (high-potential) testing verifies the dielectric withstand capability of electrical insulation by applying a test voltage significantly higher than the normal working voltage. The standard formula of twice the working voltage plus 1000V comes from IEC 60950 / IEC 62368 safety standards for IT equipment. This test voltage is applied between primary and secondary circuits, or between live parts and accessible conductive parts, for 60 seconds during type testing. It detects insulation weaknesses, contamination, and insufficient creepage/clearance distances.
Variables
- V_test — Required hipot test voltage (V)
- V_working — Maximum normal operating voltage (V)
Practical Notes
Production line testing typically uses 80% of the type test voltage or applies the full voltage for shorter duration (1-2 seconds). For 240V mains equipment, the hipot test voltage is 2×240+1000 = 1480V, often rounded up to 1500V. Some standards use different formulas; always check the specific applicable standard (UL, IEC, EN) for your product category.
Symbols and units
| Symbol | Meaning | Default unit | Accepted units |
|---|---|---|---|
| Vtest | Test Voltage | V | pV, nV, µV, mV, V, kV |
| Vwork | Working Voltage | V | pV, nV, µV, mV, V, kV |
Step by step
- 1. What you know: Working Voltage 26.4 V
- 2. The relation: V_test = 2 × V_working + 1000V
- 3. Substitute: Vwork = 26.4 V
- 4. Result: Test Voltage = 1.053 kV
Worked examples
Minimum range
Given: Working Voltage 0.726 V
Result: Test Voltage = 1.001 kV
Low range
Given: Working Voltage 7.26 V
Result: Test Voltage = 1.015 kV
Typical
Given: Working Voltage 26.4 V
Result: Test Voltage = 1.053 kV
High range
Given: Working Voltage 0.506 kV
Result: Test Voltage = 2.012 kV
Maximum range
Given: Working Voltage 5.06 kV
Result: Test Voltage = 11.12 kV
Solving for each variable
Solve for Test Voltage
Working Voltage 0.726 V → 1.001 kV
Solve for Working Voltage
Test Voltage 0.33 V → -0.4998 kV
How Test Voltage changes with Working Voltage
| Working Voltage (input) | Test Voltage (result) |
|---|---|
| 2.64 V | 1.005 kV |
| 6.6 V | 1.013 kV |
| 13.2 V | 1.026 kV |
| 19.8 V | 1.04 kV |
| 26.4 V | 1.053 kV |
| 39.6 V | 1.079 kV |
| 52.8 V | 1.106 kV |
| 105.6 V | 1.211 kV |
| 0.1848 kV | 1.37 kV |
| 0.264 kV | 1.528 kV |
The same result in other units
| Unit | Value |
|---|---|
| mV | 1053000 |
| V | 1053 |
| kV | 1.053 |
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<p><a href="https://vbatpower.com/formulas/isolation-hipot/">Hi-Pot Test Voltage</a> Calculator by vbatpower.com</p>Frequently asked questions
How do you calculate Hi-Pot Test Voltage?
Use V_test = 2 × V_working + 1000V. With Working Voltage 26.4 V, Test Voltage works out to 1.053 kV.
What is the formula for Hi-Pot Test Voltage?
The formula is V_test = 2 × V_working + 1000V. Hipot (high-potential) testing verifies the dielectric withstand capability of electrical insulation by applying a test voltage significantly higher than the normal working voltage.
How do you find Working Voltage when you know the other values?
Rearrange for Working Voltage: with Test Voltage 0.33 V, Working Voltage is -0.4998 kV.
What units does Hi-Pot Test Voltage use?
Test Voltage is shown in mV, V, kV. Values are held in SI base units internally, so you can mix prefixes without converting by hand.
Related Concepts
All Safety / Protection formulas →Need more features?
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