Siemens Siprotec 7SD600 - Page 37

' $ ! $!& #$"&&"!  5 (%& !' $$ !" 
  


($*$+/  ⋅  +1 .3 
% 0'$ ",++$"0(,+ (/ "' +&$# /, 0' 0 (0 +, ),+&$. ",*4
-)($/ 2(0' (&1.$  (0 *1/0 !$ +,0$# 0' 0 0'$ / *$
",++$"0(,+ *1/0 !$ 1/$# 0 !,0' )(+$ $+#/ +# 0' 0 (0
(/ $//$+0( ) 0, $+/1.$ ",*-)( +"$ 2(0' 0'$ 0$"'+(" )
# 0 ,% 0'$  $& 0'$.* ) . 0(+&
(&1.$  /',2/ ",++$"0(,+ ,% 0'$  0,
"1..$+0 0. +/%,.*$./ ,+)3 %,. (/,) 0$#+$10. ) ,.
.$/,+ +0$ .0'$# /3/0$*














0, 

 
Figure 4.3 Connection of summation transformer 4AM4930 to 2-current transforĆ
mers in isolated-neutral systems or systems which are not effectively
earthed.