14 Dec
2004
14 Dec
'04
4:57 p.m.
On Tue, 14 Dec 2004, Jochen Kunz wrote:
The 400 Hz three phase current is generated by a
motor-generator. The
rotating mass of this machine is enough to keep the Cyber running for
some seconds.
That detail alone justifies it all; simple physics (well,
a lot of iron and copper) makes for a reliable UPS for the
diesel switchover. I don't think APC makes one that size :-)