Settings - Siemens SIPROTEC 4 User Manual

Functions
2.11 Thermal Overload Protection 49
[fo_tripping-time-overload, 1, en_US]
with
τ
k
Ι
Nom
Ι
Ι
pre
Θ
Nom
Θ
k
Example:
Maschine: Ι
Nom Mach
= 1.15 Ι
Ι
max Mach
Θ = 93 °C Temperature at Ι
Nom Mach
τ = 600 s (thermal time constant of the machine)
th
Current transformer: 500 A/1 A
[einstellwert-k-111-260602-kn, 1, en_US]
[einstellwert-temperatur-100-260602-kn, 1, en_US]
Motor Starting Recognition
The motor starting is detected when setting I MOTOR START at address 1107 is exceeded. Information on
how to perform the configuration is given under "Recognition of Running Condition (only for motors)" in
Subsection 2.1.3.2 Setting
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 secon-
dary nominal current of the current transformer.
Addr. Parameter
4201 FCT 49
4202 49 K-FACTOR
4203 TIME CONSTANT
4204 49 Θ ALARM
4205 I ALARM
178
TIME CONSTANT (address 4203)
49 K-FACTOR (address 4202)
Nominal device current in A
Fault current through phase in A
Prefault current
Temperature at nominal current Ι
Coolant temperature input (scaling with address 4209 or 4210)
= 483 A
at Θ = 40 °C
Nom k
Nom Mach
Notes.
C Setting Options
OFF
ON
Alarm Only
0.10 .. 4.00
1.0 .. 999.9 min
50 .. 100 %
1A 0.10 .. 4.00 A
5A 0.50 .. 20.00 A
(address 4209 49 TEMP. RISE I)
Nom
Default Setting Comments
OFF 49 Thermal overload
protection
1.10 49 K-Factor
100.0 min Time Constant
90 % 49 Thermal Alarm Stage
1.00 A Current Overload Alarm
Setpoint
5.00 A
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016