Settings; Information Overview - Siemens siprotec 7SA6 User Manual

6.17.3 Settings

Addr. Setting Title
4201 Ther. OVERLOAD
4202 K-FACTOR
4203 TIME CONSTANT
Θ ALARM
4204
4205 I ALARM
4206 CALC. METHOD

6.17.4 Information Overview

F.No. Alarm
1503 >BLK ThOverload
1511 Th.Overload OFF
1512 Th.Overload BLK
1513 Th.O/L ACTIVE
1515 Th.O/L I Alarm
Th.O/L Θ Alarm
1516
1517 Th.O/L Pickup
1521 Th.O/L TRIP
7SA6 Manual
C53000-G1176-C133-1
Since an overload usually occurs in a balanced way, this setting is of minor
importance. If unbalanced overloads are to be expected, however, these options lead
to different results.
Averaging should only be used if a rapid thermal equilibrium is possible in the
protected object, e.g. with belted cables. If the three phases are, however, more or
less thermally isolated (e.g. single conductor cables or overhead lines), one of the
maximum settings should be chosen at any rate.
Note: The indicated secondary current for setting ranges and default settings refer to
I = 1 A. For the nominal current 5 A the current values are to be multiplied by 5.
N
Setting Options
OFF
ON
Alarm Only
0.10..4.00
1.0..999.9 min
50..100 %
0.10..4.00 A
Theta Max
Average Theta
Theta from Imax
>BLOCK Thermal Overload Protection
Thermal Overload Protection OFF
Thermal Overload Protection BLOCKED
Thermal Overload Protection ACTIVE
Th. Overload: Current Alarm (I alarm)
Th. Overload Alarm: Near Thermal Trip
Th. Overload Pickup before trip
Th. Overload TRIP command
Default Setting
OFF Thermal overload protection
1.10 K-Factor
100.0 min Time constant
90 % Thermal Alarm Stage
1.00 A Current Overload Alarm setpoint
Theta Max Method of Acquiring Tempera-
ture
Comments
Functions
Comments
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