Dear George
Brown out condition may occur during peak periods of utility usage
whereby the mains voltage drops to a level well below the minimum
voltage required to operate a critical load, and the duration of this
condition may be sec (or Hours in case of UPS, which is battery backed
up).
Generally minimum voltage at which the safe operation of the power
supply is guaranteed is specified in the Input Voltage specification
(Typically 180V to 264 V for 240V mains system.)
I hope this will help
-Original Message-
From: Sparacino,George [SMTP:sparaci...@andovercontrols.com]
Sent: Wednesday, 23 June 1999 4:57
To: emc-p...@ieee.org
Subject: Brown-out..
Good Afternoon Folks...
I am being asked to provide specific brown-out voltage values for our
power
supplies. When we measured several supplies (of the same type) we
came up
with a range in which brown-out occurs.. not a specific voltage.
2 Questions:
1.) Could anyone give me a definition / explanation of the term
Brown-Out
as applied to switching power supplies ?
2.) Does one normally spec Brown-Out voltage as a specific value ? Or
as
within a range below the lower operating limit of a switching power
supply ?
Thanks for your help,
George
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