Technical data

ManualsBrandsSiemens ManualsMonitor175V

Siemens SIP · 2008

12 Motor Protection / 7SK80

12

12/20

Typical connections

n

Connection of current

and voltage transformers

Standard connection

For grounded networks, the ground cur

-

rent is obtained from the phase currents by

the residual current circuit.

Fig. 12/18

Residual current

circuit without direc

-

tional element

Fig. 12/19

Sensitive ground-

current detection

without directional

element

Fig. 12/20

Residual current

circuit with direc

-

tional element (no

directional element

for phase)