nanog mailing list archives
Re: AC/AC power conversion for datacenters
From: Vadim Antonov <avg () kotovnik com>
Date: Tue, 3 Jun 2003 13:52:52 -0700 (PDT)
Here's a 3KW one for E389: http://www.taunus-transformatoren.de/transformers/transformers_110_120_220_230_240.htmlMatthew Zito <mzito () gridapp com>, (Actually, you don't need a two-coil transformer - a one-coil transformer with a tap in the middle will do, and those may be even cheaper). Note that transformers do NOT change frequency from 50Hz as in EU to 60Hz as in US; typically this is not a problem for electronics power supplies, because the first thing they do is rectify the mains voltage to DC, but you may want to check that with your equipment specs or with their tech support. Note also that if your higher-voltage equipment requires multiple phases, you're out of luck. The "220V" in US is usually two 110V feeds with 180 degrees shift, so there's a zero-point wire as well, allowing asymmetrical loading. This kind of supply may be provided with a transformer, but I've never seen one like that. The EU multi-phase power is typically 3-phases with 120 degree-shifted 230V supplies, there's no way to convert to it from single- or dual-phase power to it w/o electronic invertor or motor-generator combination. --vadim
Current thread:
- AC/AC power conversion for datacenters Matthew Zito (Jun 03)
- Re: AC/AC power conversion for datacenters Peter Galbavy (Jun 03)
- Re: AC/AC power conversion for datacenters Stephen J. Wilcox (Jun 03)
- Re: AC/AC power conversion for datacenters Simon Lockhart (Jun 03)
- Re: AC/AC power conversion for datacenters Stephen J. Wilcox (Jun 03)
- Re: AC/AC power conversion for datacenters Jay Hennigan (Jun 03)
- Re: AC/AC power conversion for datacenters Christopher X. Candreva (Jun 03)
- Re: AC/AC power conversion for datacenters Robert Boyle (Jun 03)
- Re: AC/AC power conversion for datacenters Vadim Antonov (Jun 03)
- Re: AC/AC power conversion for datacenters Vadim Antonov (Jun 03)
- Re: AC/AC power conversion for datacenters Vadim Antonov (Jun 03)
- Re: AC/AC power conversion for datacenters David Lesher (Jun 03)
- <Possible follow-ups>
- Re: AC/AC power conversion for datacenters Neil J. McRae (Jun 03)
- Re: AC/AC power conversion for datacenters Peter Galbavy (Jun 03)