VAMP 265, Operation And Configuration Instructions, Page: 71 / 220

Technical description 2 Protection functions 2.8 Thermal overload protection T>
(49)
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Parameters of the thermal overload stage T> (49)
Parameter Value Unit Description Note
Status -
Blocked
Start
Trip Current status of the stage
F
F
Time hh:mm:s
s Estimated time to trip
SCntr Cumulative start counter C
TCntr Cumulative trip counter C
Force Off
On Force flag for status forcing for
test purposes. This is a
common flag for all stages and
output relays, too.
Automatically reset by a 5-
minute timeout. Set
T % Calculated temperature rise.
Trip limit is 100 %. F
MaxRMS Arms Measured current. Highest of
the three phases.
Imax A kxIgn. Current corresponding
to the 100 % temperature rise.
k> xIn Allowed overload (service
factor) Set
Alarm % Alarm level Set
tau min Thermal time constant Set
ctau xtau Coefficient for cooling time
constant. Default = 1.0 Set
kTamb xIn Ambient temperature
corrected max. allowed
continuous current
Imax40 %In Allowed load at Tamb +40  C.
Default = 100 %.
Set
Imax70 %In Allowed load at Tamb +70  C. Set
Tamb  C Ambient temperature.
Editable Samb=n/a. Default =
+40
 C
Set
Samb
n/a
ExtAI1..
.16 Sensor for ambient
temperature
No sensor in use for Tamb
External Analogue input 1...16
Set
For details of setting ranges see chapter 9.3.
Set = An editable parameter (password needed)
C = Can be cleared to zero
F = Editable when force flag is on