[41325] in North American Network Operators' Group
Re: 220v/50hz power rig
daemon@ATHENA.MIT.EDU (Lincoln Dale)
Thu Sep 6 06:37:53 2001
Message-Id: <4.3.2.7.2.20010906032849.03578e60@203.9.111.130>
Date: Thu, 06 Sep 2001 03:34:56 -0700
To: David Luyer <david@luyer.net>
From: Lincoln Dale <ltd@interlink.com.au>
Cc: nanog@merit.edu
In-Reply-To: <999769226.9556.142.camel@typhaon>
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[straying well from the topic here, but ...]
At 07:40 PM 6/09/2001 +1000, David Luyer wrote:
>(Australia is 240V 50Hz on the east coast, and I think it's still
>250V 50Hz on the west coast, it used to be 260V and in some sites
>[eg, BankWest tower upper floors on weekends, ie, where the microwave
>gear for the academic network is located] I've seen up to 270V.)
the tolerance is typically +/- 10%, so it isn't uncommon to see anything
between 216-264V and HZ +/- 1%.
the +/- range on voltage is also what makes it 'easier' for power-supply
makers (at least if the design isn't dependent on HZ).
this is why you typically see multi-range power-supplies state "115V or 230V".
HZ moving around causes far more problems -- makes peoples clocks go slow
and fast. for that reason, HZ is very tightly regulated - if it goes over
for a period, they'll make it go under to even it out.
cheers,
lincoln.
NB. that is simply WA power and the fact that it is somewhat hard to
regulate supply to demand when you've got an isolated grid.
