Check with your power company. They may be able to switch taps on the
transformer to reduce the voltage. I don't know what the situation is
for you, but in some places power companies can be forced to
repair/replace equipment that they fry due to faults in their system.
Ed
On 7/6/2013 5:14 PM, Mark C. Stephens wrote:
I just checked the HP manual, most of the linear equipment is specified: 240V
+5/-10%
So, I am a little over at 258V here ):
I am going to unplug everything until I can get this sorted out.
Can't afford to lose anything more, in both time and spares obtainability.
marki
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Jim Lux
Sent: Sunday, 7 July 2013 8:01 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting
normally, PB LEDS scannning and appears to be reading o/k
On 7/6/13 2:46 PM, Mark C. Stephens wrote:
Hopefully HP Voltage "Derated" the Cap as well so it can handle our
250V here.. We are across the road from the main transformer for the
area so the voltage is highest at our place, I checked the meter box
this morning - it is 255-258V on all 3 phases, no wonder I am having
problems.
Is that nominally 240 phase to neutral/ 415 phase to phase. typically, the
utility is allowed 10% tolerance.. I see that wikipedia says AS60038 calls out
230V +10% -6% so that's 253 to 216
One thing to be wary of is that the utility supplies voltages at, say, 120V or
240V (in the US), but utilization equipment (motors, for
instance) is labeled as 115V or 230V. This accounts for the 2% voltage drop in
the branch circuit, among other things.
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