Metered Measurands; Scaling - Siemens SIPROTEC 7SJ80 Manual
Overcurrent protection, motor protection, voltage and frequency protection
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1.4
Metered measurands
Scaling
Example
SIPROTEC DNP 3.0 - Bus mapping / Point lists 7SJ80/7SK80/7RW80
C53000-L2040-A320-2
The scaling of the metered measurands, which are derived from measured values, re-
fers to:
60000 impulses per hour for V = Vprim and I = Iprim
V
= Full Scale Voltage
prim
(parameter address = 1101)
I
= F
S
C
ULL
CALE
URRENT
prim
parameter address = 1102)
In the parameter set is configured:
I
= 1000 A and V
prim
60000 impulses correspond so that:
1 h * 1000 A * 400 kV * √3 = 692.82 MWh
Note
• The type of the update (cyclic, with or without deletion) and the update interval must
be programmed for the metered measurands with the parametrization software
DIGSI 4.
• The scaling of the metered measurands at binary inputs ("Wp(puls)" and
"Wq(puls)") depends on the externally connected pulse generator.
= 400.0 kV,
prim
Metered measurands
13
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