Siemens SIPROTEC 6MD665, Руководство пользователя

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2.4 Measured value processing
31
6MD665 Manual
C53000-G1876-C103-3
2.4.2.1 Description
The measuring transducer function is explained via the following function blocks:
• Measuring transducer U (MU U)
• Measuring transducer I (MU I)
• Measuring transducer one-phase (MU1P)
• Measuring transducer three-phase (MU3P)
• Measuring transducer Aron (MUAron)
The individual measuring transducer blocks have to be activated in the functional
scope of the device and are then displayed in the DIGSI
®
configuration matrix with
their input channels and output quantities. They are assigned to current and voltage
channels of the device. The output quantities can be assigned to various destinations,
e.g. system interface, CFC or the display.
A functional description of the individual measuring transducer blocks and a list of the
accompanying parameters and information can be found in the following chapters.
Table 2-3 Connection examples for a rated transformer voltage V
n secondary
from 100 V
Connection variants Input voltages
Secondary
Functions Parameter
Transformer V
n sec
Comments
Star connection 3 x Vfeeder
Ph-N
= 57.7 V
1 x V
Ph-N
= 57.7 V
Measuring trans-
ducer
3-phase
100 V for feeder operational
measurements
Measuring trans-
ducer
1-phase
100 V for reference operational
measurements
SYNC function 1 to
SYNC function 5 57.7 V
1)
for synchronisation func-
tion
Star connection
Vfeeder delta connec-
tion
Vref
3 x VfeederPh-N = 57.7
V
1 x VPh-Ph = 100 V
Measuring trans-
ducer
3-phase
100 V for feeder operational
measurements
Measuring trans-
ducer
1-phase
173.2 V
2)
for reference operational
measurements
SYNC function 6 to
SYNC function 8 100 V for synchronisation func-
tion
Aron connection 2 x Vfeeder
Ph-Ph
= 100 V
1 x V
Ph-Ph
= 100 V
Measuring trans-
ducer
Aron
173.2 V
2)
for feeder operational
measurements
Measuring trans-
ducer
1-phase
173.2 V
2)
for reference operational
measurements
SYNC function 6 to
SYNC function 8 100 V for synchronisation func-
tion