Rockwell Automation Low-Voltage Switchgear and Controlgear - Manual (Page 34)

Parameter
Details chapter Discon
n
ec
to
rs
Fuses
Circuit br
eak
-
ers
Load switch
es
Con
tac
tor
Starters
Rated isolation voltage U
i
2.3.1 P P P P P
Rated operational voltage U
e
(<U
i
) 2.3.2 P P P P P
Rated impulse withstand voltage U
imp
2.3.3 P P P P
Rated operational current I
e
2.3.2 P P P P P
Utilization category 2.3.2 P P P P
Short-circuit withstand capacity / short-circuit
protection 2.3.4 P P P
Rated short-circuit making capacity I
cm
2.3.4.6.1 P P
Rated short-circuit breaking capacity I
cu
, I
cs
2.3.4.6.2 P P
Cut-off current 2.3.4.2
2.3.4.4 C C
Let-through energy (Joule integral) 2.3.4.1
2.3.4.4 C C
Rated short time current I
cw
2.3.4.3 C C C
Short-circuit coordination
(Type 1, Type 2) with fuses or circuit breakers 2.3.4.5.2 P
Thermal load 2.3.5 P P P P
Ambient temperature 2.3.5.1 C C C C C
Operational overcurrents
(for example heavy-duty starting) 2.3.5.2 C C C C C
Life span 2.3.6 C C
Frequency of operation 2.3.7 C C
Rated frequency / harmonics 2.3.8
2.4.3 C C C C C
Safety clearances 2.3.9 P P P
Mounting position 2.3.10 C C
Pollution degree 2.3.3 A A A A A
Overvoltage category 2.3.3 A A A A A
Protective separation 2.3.11 A A A A A
Site altitude 2.3.12 A A A A A
Shock and vibration 2.3.13 A A A A A
Humidity / climatic loading A A A A A
Chemical ambient influences A A A A A
Radioactive radiation A A A A A
UV radiation A A A A A
External form / IP degree of protection A A A A A
Tab. 2.3-1
Selection criteria for low-voltage switchgear for main circuits
P … Primary selection factors
C … Complementary selection factors
A … Additional criteria
LVSAM-WP001A-EN-P - April 2009 2-6