Subject: power surges

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From: Robert Zafran (marklin@redshift.com)
Date: Wed Oct 11 2000 - 06:51:26 PDT 

Date: Wed, 11 Oct 2000 06:51:26 -0700
Subject: Subject: power surges
From: Robert Zafran <marklin@redshift.com>
Message-ID: <B609BE6D.AFA%marklin@redshift.com>

Sounds like he meant "electrical outages", actually no "power" is
distributed, the term should really be "electricity lines", etc. and in fact
the electrical suppliers (Calpine) and distributors (PG&E) use that term and
not power.

Outages can be caused by random disconnects from the western states
electrical distribution grid necessitated by too high a demand on the
system, like happened on June 14th. Of course they can also be caused by
downed electrical lines, local transformer problems (the most usual cause),
problems at sub-stations, etc.

If "power surge" or "power desurge" is a temporary reduction/increase in
the level of voltage, typically 115 Volts, supplied to the consumer. This
can be caused by the above incidents as the load on the local distribution
grid varies to adjust to the loss/gain due to the incident. The voltage
delivered to most consumers varies around 115 Volts. Most manufacturing
and computer companies filter the electricity from power company so that
they have constant 110/220V going to computer systems and equipment.

bob zafran
IBM research center

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San Jose CA 95123-5506 *
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Email: "Robert Zafran" <marklin@redshift.com>
Web: (www.redshift.com/`marklin)

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