SC 77A

EMC - Low frequency phenomena

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

SC 77AWG 1 A. ArditoPPUB2011-052021

History

Stage
Document
Downloads
Decision Date
Target Date
1CD
77A/649/CD PDF file 581 kB
2008-05-16 
AMW
77A/648/MCR PDF file 104 kB
2008-05-16 
ACDV
77A/690/CC Word file 194 kB
PDF file 154 kB
2009-04-172008-10
CCDV
77A/705/CDV PDF file 338 kB
PDF file 357 kB
2009-08-072009-09
AFDIS
77A/729/RVC Word file 183 kB
PDF file 147 kB
2010-06-252010-04
DECFDIS
2011-01-062011-02
RFDIS
2011-01-142011-01
CFDIS
77A/740/FDIS

2011-02-112011-04
APUB
77A/747/RVD PDF file 125 kB
2011-04-282011-04
APUB
77A/747A/RVD PDF file 122 kB
2011-04-282011-04
BPUB
2011-04-292011-04
PPUB
2011-05-122011-05
 2019-02

Abstract

IEC 61000-3-12:2011 deals with the limitation of harmonic currents injected into the public supply system. The limits given in this International Standard are applicable to electrical and electronic equipment with a rated input current exceeding 16 A and up to and including 75 A per phase, intended to be connected to public low-voltage a.c. distribution systems of the following types:
- nominal voltage up to 240 V, single-phase, two or three wires;
- nominal voltage up to 690 V, three-phase, three or four wires;
- nominal frequency 50 Hz or 60 Hz. Other distribution systems are excluded. The limits given in this edition apply to equipment when connected to 230/400 V, 50 Hz systems. This standard applies to equipment intended to be connected to low-voltage systems interfacing with the public supply at the low-voltage level. It does not apply to equipment intended to be connected only to private low-voltage systems interfacing with the public supply only at the medium- or high-voltage level. This standard defines:
a) requirements and emission limits for equipment;
b) methods for type tests and simulations. Tests according to this International Standard are type tests of complete pieces of equipment. Conformity with this standard can also be determined by validated simulations. This second edition cancels and replaces the first edition published in 2004 and constitutes a technical revision. The significant technical changes with respect to the previous edition are:
- the replacement of the reference fundamental current I1 by the reference current Iref for the calculation of emission limits;
- a new added table of current emission limits (Table 5);
- a new added annex (Annex A) to define test conditions for some types of equipment;
- Deletion of the former Annexes B (Approximate interpolation formulas) and D (Information on the PWHD factor).

Project

IEC 61000-3-12:2011 ED2

Electromagnetic compatibility (EMC) - Part 3-12: Limits - Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤ 75 A per phase

 

 

Associated Documents:

77A/933/DC

PDF file 125 kB
77A/913/RM

PDF file 567 kB
77A/836/RM

PDF file 489 kB
77A/1063/RM

PDF file 238 kB
77A/1013/RR

PDF file 115 kB