7
05.01
7.3 Overcurrent protective devices, transformers and main switch
7-219
©
Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
10
100
1 000
10 000
Touch voltage (V)
Time (ms)
25 V AC
AC–2
60 V DC
DC–2
AC–2
DC–2
Decisive voltage class A
30 V AC
AC–2
250 V
10
100
1000
Fig. 7-8
Permissible tripping time of fuses/circuit–breakers
Note
The dotted line for AC–2 applies if there is only one single circuit with DVC A.
The solid line applies if there is more than one circuit with DVC A.
For timely tripping of fuses, the loop resistance as well as the vector group of
the line supply transformer being fed must satisfy the requirement that the touch
voltage of the devices is switched off by the provided fuses within the permissi-
ble tripping time (see Fig. 7-8 in accordance with EN 61800–5–1 Ed. 2007).
7 Line Supply Connection
02.12
