DC Withstand Voltage Calculator

DC Withstand Voltage Calculator — IEC 60840 / IEC 60229

Compute the required DC test voltage, test duration and leakage threshold for cable accessory acceptance (IEC 60840, ≤150 kV) or cable sheath integrity (IEC 60229 / IEEE 400). Then size the required DEMIKS HVDC system. Inputs follow the published standards; the result is directional and must be cross-checked against the project specification.

Your inputs

TEST SCENARIO Select the workload that matches your project

RATED VOLTAGE UO (KV, PHASE-TO-EARTH) Example: 66 kV system → Uo ≈ 38 kV; 110 kV system → Uo ≈ 64 kV

TEST FACTOR (× UO) IEC 60840 :2020 recommends 1.73 or 2.0 × Uo for after-installation tests

ESTIMATED LOAD CAPACITANCE (NF) Cable + termination + DUT combined capacitance

ESTIMATED LEAKAGE CURRENT (MA) µA-level for dry insulators; mA-level for long cables

BOOST RAMP RATE (KV/S) Standard 1–2 kV/s; slow near target voltage

Enter parameters and click Calculate to generate sizing data.

Calculated Sizing

Required DC Test Voltage

0.0 kV

Minimum Generator Rating (≥ 1.2× Rule)

0 kV

Ramp Time

0 s

Test Duration

15 min

Max Leakage Threshold

0.5 mA