IEC 60947-4-2:2011/COR1:2012

IEC 60947-4-2 CEI 60947-4-2
(Third edition – 2011) (Troisième édition – 2011)

Low-voltage switchgear and controlgear – Appareillage à basse tension –

Part 4-2: Contactors and motor-starters – Partie 4-2: Contacteurs et démarreurs de
AC semiconductor motor controllers moteurs – Gradateurs et démarreurs à

and starters semiconducteurs de moteurs à courant alternatif

CO RRI G ENDU M 1
Tableau 19 – Limites de perturbation en
Table 19 – Terminal disturbance voltage
tension sur les bornes pour les
limits for conducted radio-frequency
émissions conduites à fréquences
emission
radioélectriques
Replace, in the first row of this existing
Remplacer, dans la première ligne du
table “currents” by “power”, as follows:
tableau existant “courants” par
“puissance”, comme suit:
Table 19 – Terminal disturbance voltage limits for conducted radio-frequency emission
a a, b a
Environment A Environment A Environment B
rated input power
rated input power ≤ 20 kVA
Frequency
> 20 kVA
range
MHz
Quasi-peak Average Quasi-peak Average Quasi-peak Average
dB (µV) dB (µV) dB (µV) dB (µV) dB (µV) dB (µV)
0,15 to 0,5 79 66 100 90 66 to 56 56 to 46
(decrease (decrease
with log with log
of frequency) of frequency)
0,5 to 5 73 60 86 76 56 46
5 to 30 73 60 90 to 73 80 to 60 60 50
(decrease (decrease
with log with log
of frequency) of frequency)
a
Defined by IEC 60947-1.
b
These limits apply to equipment with a rated input power > 20 kVA. The manufacturer and/or supplier shall
provide information on installation measures that can be used to reduce emissions fr
...