ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. B
4-18
· Solder in a capacitor or combination of capacitors with the
total value determined for C
X
.
Theoretical value of C
X
a) Circuit according to Fig. 4.8a (or Fig. 4.5):
C
CC C
CC C
X
KK R
KK R
=
+´
++
()
12
12
b) Circuit according to Fig. 4.8b:
C
CCC
CCC
X
K
S
R
K
S
R
=
´+
++
33
33
()
4.2.3.5.3. Measuring the voltage values
The value of the voltage across the bridge as measured on the
YWX 111 in relation to different leakage resistances is deter-
mined by measurement with a variable resistor inserted in place
of the leakage resistance as shown in Fig. 4.6.
Fig. 4.6 Measuring the voltages corresponding to leakage
resistance
Leakage resistor R
P
:
· 0 W, solid ground fault
· 2000 W, ³ 2.5 W
· 5000 W, ³ 2.5 W.
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