Jeff,

I assume EN61000-4-11 is the same as IEC61000-4-11:1994.

Scope of IEC61000-4-11 says: " This section of IEC1000-4 defines the immunity 
test methods and range of preferred test levels for electrical and electronic 
equipment connected to low-voltage power supply networks for voltage dips, 
short interruptions and voltage variations. The standard applies to electrical 
and electronic equipment having a rated input current not exceeding 16A per 
phase. It does not apply to electrical and electronic equipment for connection 
to dc networks or 400Hz ac networks. Tests for these networks will be covered by
future IEC standards. The object of this standards is to establish a common 
reference for evaluation the immunity of electrical and electronic equipment  
when subjected to voltage dips, short interruptions and voltage variations".

The scope does not say anything about that only single-phase applies, but in 
chapter 8.2.1 they are talking about 3-phase equipment and "... all three 
phases must be simultaneously tested ...."

I would say that -4-11 applies to both single- and three phase equipment.

Best regards
Amund Westin, Oslo/Norway



On Sat, 3 Feb 2001 11:40:51 -0700  "JENKINS, JEFF" <[email protected]> wrote:
>
>I have ordered this standard, but I could use a little help while I wait for
>it to arrive.  I have heard rumours that it applies only to single-phase
>equipment that draws 16A or less.  Is this true?
>
>Thanks.
>
>Jeff Jenkins
>Advanced Energy Industries, Inc.
>Fort Collins, CO
>
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