Functions
2.11 Thermal Overload Protection (ANSI 49)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
89
2.11.3 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Additional Settings.
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding second-
ary nominal current of the current transformer.
Addr. Parameter C Setting Options Default Setting Comments
1601 Ther. OVER LOAD OFF
ON
Block relay
Alarm Only
OFF Thermal Overload Protec-
tion
1602 K-FACTOR 0.10 .. 4.00 1.11 K-Factor
1603 TIME CONSTANT 30 .. 32000 sec 600 sec Thermal Time Constant
1604 Θ ALARM 70 .. 100 % 90 % Thermal Alarm Stage
1605 TEMP. RISE I 40 .. 200 °C 100 °C Temperature Rise at
Rated Sec. Curr.
1606 TEMP. RISE I 104 .. 392 °F 212 °F Temperature Rise at
Rated Sec. Curr.
1607 TEMP. INPUT Disabled
4-20 mA
Fieldbus
RTD 1
Disabled Temperature Input
1608 TEMP. SCAL. 40 .. 300 °C 100 °C Temperature for Scaling
1609 TEMP. SCAL. 104 .. 572 °F 212 °F Temperature for Scaling
1610A I ALARM 5A 0.50 .. 20.00 A 5.00 A Current Overload Alarm
Setpoint
1A 0.10 .. 4.00 A 1.00 A
1612A Kτ-FACTOR 1.0 .. 10.0 1.0 Kt-Factor when Motor
Stops
1615A I MAX THERM. 5A 2.50 .. 40.00 A 16.50 A Maximum Current for
Thermal Replica
1A 0.50 .. 8.00 A 3.30 A
1616A T EMERGENCY 10 .. 15000 sec 100 sec Emergency Time
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