I need help in understanding ETSI EN 300 386 v1.4.1 (2008-04). In section
7.2.2.4 (page 26) for "Other than telecommunication centres, AC power ports",
the standard gives the requirement for a "voltage dips and short interruptions
immunity test" (7.2.2.4.4) stating the following:
Residual voltage % 0 Criteria B
Cycle 0.5
Residual voltage % 0 Criteria B
Cycle 1
Both have the same performance criteria requirement (Criteria B) and both are
full voltage interruptions (0%), so the two entries are redundant. Obviously,
this is a typographical error. We just need to know which is the actual
requirement of the standard. Either the standard wants us to test for a half
cycle (10 ms) or for a full cycle (20 ms).
In the earlier revision (ETSI EN 300 386 v1.1.3), section 7.2.2.4 required the
following voltage interruption test:
Voltage reduction % >95
Criteria B
Duration ms 10
Did ETSI EN 300 386 v1.4.1 intend to keep the same duration using 0.5 cycle
(same as 10ms from the past) so the other entry is the actual error, or did
the committee really want to increase the required voltage interruption
immunity by testing a full 1.0 cycle (doubles the requirement to 20ms) so the
first entry is really the error?
Note: ETSI EN 300 386 v1.4.1 is titled "Electromagnetic compatibility and
Radio Spectrum Matters (ERM); Telecommunication network equipment;
ElectroMagnetic Compatibility (EMC) requirements." The date of withdrawal
(dow) or date when this standard revision becomes mandatory in Europe is 31
July 2011.
Thank you.
--
Monrad L. Monsen
Worldwide Compliance Officer
Sun Microsystems
[email protected]
303.272.9612 Office
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