Doug,
I find it confusing. Good thing there are examples.
example b) gives the correct answer.
example a) does not look correct.
Reasoning:
1) F is solved incorrectly. It should be 0.297
2) The remainder looks correct. I get 20.5 mm (without interpolation)
With interpolation I get 18.4 mm.
Dave Cuthbert
Micron Technology
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of POWELL, DOUG
Sent: Monday, November 03, 2003 2:48 PM
To: EMC-PSTC (E-mail)
Subject: IEC 61010-1:2001 section 6.7.3.2 Clearance Calculation
Has anyone tried to work through the two examples given in this section? In
trying to understand how to use the CLEARANCE = D1 + F(D2-D1) equation, I was
hoping to check my work with the examples that were given. Either I'm missing
something or these examples have some really fundamental errors.
In my application, I am attempting to calculate the basic clearance for a
working voltage of 1500 VDC with transients that peak to 1800V and ride on the
VDC. The final peak voltage is 300 Volts higher than the steady-state 1500VDC,
which apparently meets the 6.7.3.1 b) 2) criteria.
Please help!
-doug
end
Douglas E. Powell
Corporate Compliance Dept.
Advanced Energy Industries, Inc.
Fort Collins, CO 80525 USA
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