Selecting Programmable High Voltage DC Supplies 600V, 800V, and 1000V
How to choose the right voltage range. Comparing 600V vs 1000V programmable DC power supplies for IGBT testing and motor drive simulation.
When specifying a power supply for high-voltage testing, the voltage rating is the primary constraint. This page breaks down the selection criteria for industrial applications.
When do you need 600V vs 1000V? (Testing breakdown)
| Parameter | 600V Standard | 1000V+ Standard |
|---|---|---|
| Target Application | Industrial Motors (VFD) | PV Inverters & EV Grid |
| DC Bus Simulation | Up to 480V systems | 800V Architectures |
| IGBT Testing | 600V Rated IGBTs | 1200V / 1700V IGBTs |
Technical Note
When testing a 480V AC system, the DC bus voltage is calculated as V_bus = 480V_rms × √2 ≈ 678 V. A 600V supply cannot simulate the full operating range, forcing engineers to step up to 800V or 1000V units for margin testing.
The Importance of High Precision in High Voltage
In leakage current testing, a voltage drift of 1% at 1000V equals 10V. This fluctuation can cause significant noise in μA-level current measurements. Programmable supplies with high-bit ADCs/DACs ensure stability.
eTommens Series Overview (Recommended Models)
eTM-600 Series
- Range: 0-600V DC
- Power: 1kW - 15kW
- Ideal for: 380V Motor Drives
eTM-1000 Series
- Range: 0-1000V DC
- Power: 1kW - 100kW+
- Ideal for: PV Simulation, EV Batteries