Functions
2.20 Auxiliary Functions
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
275
In addition, the following may be available:
• Θ/Θ
Trip
thermal measured value of overload protection value for stator in % of the trip initiating overtem-
perature
• Θ/Θ
LTrip
thermal measured value of restart inhibit (rotor winding)
• Θ
Restart
restarting limit of restart inhibit
•T
Reclose
total time, before the motor can be restarted
• Θ
RTD 1
to Θ
RTD 12
temperature values at the RTD box.
Upon delivery, the power and operating values are set in such manner that power in line direction is positive.
Active components in line direction and inductive reactive components in line direction are also positive. The
same applies to the power factor cosϕ. It is occasionally desired to define the power drawn from the line (e.g.
as seen from the consumer) positively. Using parameter 1108 P,Q sign the signs for these components can
be inverted.
The calculation of the operational measured values also takes place while a fault is running. The values are
updated at intervals of > 0.3 s and < 1 s.
2.20.3.2 Transmitting Measured Values
Measured values can be transferred to a central control and storage device via port B.
The measuring range in which these values are transmitted depend on the protocol and, if necessary, additional
settings.
Protocol Transmittable measuring range, format
IEC 60870–5–103 0 to 240 % of the measured value.
IEC 61850 The primary operational measured values are transmitted.
The measured values as well as their unit format are set out in detail in manual PIXIT
7SJ.
The measured values are transmitted in „Float“ format. The transmitted measuring
range is not limited and corresponds to the operational measurement.
PROFIBUS,
Modbus, DNP 3.0
DNP3 TCP
PROFINET
The unit format of the measured values on the device side is at first automatically gen-
erated by means of the selected nominal values of current and voltage within the system
data.
The current unit format can be determined in DIGSI or at the device via Menu Opera-
tional Values.
The user can select via DIGSI which operational measured values (primary, secondary
or percentage) must be transmitted.
The measured values are always transmitted as 16-bit values including sign (range ±
32768). The user can define the scaling of the operational measured value to be trans-
mitted. This will result in the respective transmittable measuring range.
For further details, please refer to the descriptions and protocol profiles.
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