Manual 37353A
MFR 13 Packages - Protection Relay
© Woodward
Page 13/91
Measuring Inputs
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Voltage
Measuring
voltage
L3
L2
L1
N
G
1
2
3
4
L3
L2
L1
N
Figure 3-4: Measuring inputs - voltages
Terminal Measurement Description
A
max
1
Measuring voltage L1
2.5 mm²
2
Measuring voltage L2
2.5 mm²
3
Measuring voltage L3
2.5 mm²
4
400V direct
or trans-
former
../100V
Neutral point of the 3-phase system/transf.
2.5 mm²
Synchronizing Voltage (
Packages GPX
/
GPX-I
/
GPY-I
/
GPY-I-N
/
K08
)
NOTE
Connection of the phase voltage L3 to terminal 72 (synchronizing voltage) is necessary if
•
the generator voltage is connected as a three-wire-system and
•
the power measurement of the generator power must be three-phase.
If the input for balancing the measuring system is not connected, minor inaccuracies will occur during
the three-phase power measurement. Functionality will not be affected if the voltage L3 is not con-
nected and the power measurement is configured as single-phase.
L3
L2
L1
N
G
L3
L2
L1
Synchronizing
voltage
CB
70
71
72
a)
a) not measured
Figure 3-5: Measuring inputs - synchronizing voltage
Terminal Measurement Description
A
max
70
Synchronizing voltage L1
2.5 mm²
71
Synchronizing voltage L2
2.5 mm²
72
400V direct
or via transf.
../100V
Synchronizing voltage L3
(not measured)
2.5 mm²
