Description
Above a few hundred volts, setup discipline matters as much as the supply. The Keysight N8949A DC power supply, an N8900 autoranging system, reaches 750 V and 40 A inside a 10000 W budget. Lost in HCM lists it for rental and sale, and it arranges repair intake on request.
Plan the safety side at 750 V
Higher-voltage setups need proper insulation and guarding. So plan the test area before the unit arrives. Choose cables and fixtures rated above your working voltage, and keep exposed terminals out of reach. Next, write the discharge and shutdown steps into the test procedure. The Keysight user guide gives the exact steps for earthing, output terminals and sensing.
Also check the AC side. Because the listed input is 400 VAC, three phase, the factory-installed option must match your site, so ask Lost in HCM for a label photo and the option list.
Reading 40 A against 10 kW
The voltage limit and the current limit are separate. Rated power decides how far you can use both at once. At 750 V, 10000 W allows about 13 A, while at 500 V it allows 20 A. In addition, the full 40 A is available at 250 V or lower.
| Instrument type | N8900 Series autoranging system DC power supply |
|---|---|
| Maximum output voltage | 750 V |
| Maximum output current | 40 A |
| Maximum output power | 10000 W |
| AC input | 400 VAC, three phase |
| Interfaces | LAN, USB, GPIB and analog |
Where the Keysight N8949A DC power supply fits
- Development of DC-powered assemblies, such as converter inputs.
- Production screening, for example with a scripted sequence and clear pass-fail limits.
- Industrial electronics tests that need a stable high-voltage DC feed.
Note that it is a DC source. If your device can return energy, review inrush and shutdown first, because the listing does not describe a regenerative supply.
Rent the Keysight N8949A DC power supply, buy it or send it for repair
A rental works for a short campaign or a trial before you buy. In contrast, a lab that tests every week may prefer a purchase. A repair case needs the serial number, the symptoms, any error messages and photos. However, Lost in HCM keeps repair and traceable calibration as two separate jobs.
SMK Vietnam hosts the listing and does not stock or service anything. So to start, request a quote from Lost in HCM with your dates, site and operating points. Then see related units in power supplies. For manufacturer data, visit the Keysight website, or contact SMK Vietnam with questions.
N8949A questions
How much current can I draw at 500 V?
About 20 A. Rated power caps voltage times current at 10 kW, so 500 V leaves 20 A.
What does a 750 V setup need beyond the supply?
Proper insulation and guarding, plus leads and fixtures with a suitable rating. Review these with your safety team.
Which interfaces can I automate with?
Remote control runs over LAN, USB, GPIB or an analog interface. Prove the driver on one station before you scale up.
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