Figure. 5.3.13 - 134. Thermal response with k
SF
factor correctly set.
When the installation conditions vary from the presumptive conditions, the cable's current-carrying
capacity can be reduced so that the temperature of 90
̊
C is achieved with a 550 A current instead of
the 680 A current given in the initial data.
Estimating trip time
Calcula
Calculatted e
ed effffectiv
ective nominal curr
e nominal current:
ent:
I
N
=k
SF
× tamb
fact
× I
Nom
Where:
• I
N
= calculated effective nominal current
• k
SF
= the service factor
• k
amb
= the ambient temperature factor
• I
Nom
= the nominal current of the protected device
Calcula
Calculatted end hea
ed end heating:
ting:
A
AQ
Q-C213
-C213
Instruction manual
Version: 2.04
184
Содержание AQ-C213
Страница 1: ...AQ C213 Capacitor bank protection IED Instruction manual ...
Страница 308: ...Figure 7 4 184 Example block scheme A AQ Q C213 C213 Instruction manual Version 2 04 307 ...
Страница 330: ...Figure 8 14 207 Panel cutout dimensions and device spacing A AQ Q C213 C213 Instruction manual Version 2 04 329 ...