Functions
2.9 Thermal Overload Protection 49
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
155
2.9.3 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings".
The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec-
ondary nominal current of the current transformer.
2.9.4 Information List
Addr. Parameter C Setting Options Default Setting Comments
4201 FCT 49 OFF
ON
Alarm Only
OFF 49 Thermal overload pro-
tection
4202 49 K-FACTOR 0.10 .. 4.00 1.10 49 K-Factor
4203 TIME CONSTANT 1.0 .. 999.9 min 100.0 min Time Constant
4204 49 Θ ALARM 50 .. 100 % 90 % 49 Thermal Alarm Stage
4205 I ALARM 1A 0.10 .. 4.00 A 1.00 A Current Overload Alarm
Setpoint
5A 0.50 .. 20.00 A 5.00 A
4207A Kτ-FACTOR 1.0 .. 10.0 1.0 Kt-FACTOR when motor
stops
4208A T EMERGENCY 10 .. 15000 sec 100 sec Emergency time
4209 49 TEMP. RISE I 40 .. 200 °C 100 °C 49 Temperature rise at
rated sec. curr.
4210 49 TEMP. RISE I 104 .. 392 °F 212 °F 49 Temperature rise at
rated sec. curr.
No. Information Type of In-
formation
Comments
1503 >BLOCK 49 O/L SP >BLOCK 49 Overload Protection
1507 >EmergencyStart SP >Emergency start of motors
1511 49 O / L OFF OUT 49 Overload Protection is OFF
1512 49 O/L BLOCK OUT 49 Overload Protection is BLOCKED
1513 49 O/L ACTIVE OUT 49 Overload Protection is ACTIVE
1515 49 O/L I Alarm OUT 49 Overload Current Alarm (I alarm)
1516 49 O/L Θ Alarm OUT 49 Overload Alarm! Near Thermal Trip
1517 49 Winding O/L OUT 49 Winding Overload
1521 49 Th O/L TRIP OUT 49 Thermal Overload TRIP
1580 >RES 49 Image SP >49 Reset of Thermal Overload Image
1581 49 Image res. OUT 49 Thermal Overload Image reset
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