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Operation Manual 37107F
MFR 3 - Multi Function Relay
© Woodward
Page 19/165
Busbar
N
L1
L2
L3
Busbar voltage
23
24
L2
L1
MCB
GCB
G
Synchronous
Figure 3-5: Measuring inputs - voltage - busbar
Terminal Measuring
Description
A
max
23
400 Vac
100 Vac
Busbar voltage L1
2.5 mm²
24
Busbar voltage L2
2.5 mm²
Mains
L3
L2
L1
N
Mains voltage
MCB
52
L3
51
50
L2
L1
GCB
G
Figure 3-6: Measuring inputs - voltage - mains
Terminal Measuring
Description
A
max
50
400 Vac direct
or via measu-
ring transducer
../100 Vac
Mains voltage L1
2.5 mm²
51
Mains voltage L2
2.5 mm²
52
Mains voltage L3
2.5 mm²
0
Neutral point of the 3-phase system/transformer/PT's
2.5 mm²
NOTE
The mains voltage measuring inputs must be connected if the unit is used in mains parallel operation.