Settings; Information List - Siemens SIPROTEC 4 Manual

Functions
2.10 Thermal Overload Protection 49
Warning Elements
By setting the thermal warning element 49 Θ ALARM (address 4204), a warning message can be issued
before reaching the tripping temperature. Tripping can thus be avoided by initiating early load reduction
measures. This warning element simultaneously represents the dropout level for the trip signal. Only when
this threshold is undershot, the tripping command will be reset and the protected equipment can be switched
on again.
The thermal element level is given in % of the tripping overtemperature.
A current warning level is also available (parameter 4205 I ALARM). The setting is set as the secondary
current in A (mperes) and should be equal to or slightly less than the permissible current k · Ι
used instead of the thermal warning element by setting the thermal warning element to 100 % thus virtually
disabling it.
Dropout Time after Emergency Starting
This function is not required for protection of lines and cables. Since it is activated by a binary input message,
parameter T EMERGENCY (address 4208) is not in effect. The factory setting can be retained.
2.10.3

Settings

Addresses which have an appended "A" can only be changed with DIGSI, under "Additional Settings".
The table indicates region-specific default settings. Column C (configuration) indicates the corresponding
secondary 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
4207A Kτ-FACTOR
4208A T EMERGENCY

Information List

2.10.4
No. Information
1503 >BLOCK 49 O/L
1507 >EmergencyStart
1511 49 O / L OFF
1512 49 O/L BLOCK
1513 49 O/L ACTIVE
1515 49 O/L I Alarm
1516 49 O/L Θ Alarm
1517 49 Winding O/L
1521 49 Th O/L TRIP
1580 >RES 49 Image
152
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
1.0 .. 10.0
10 .. 15000 sec
Type of Comments
Informa-
tion
SP >BLOCK 49 Overload Protection
SP >Emergency start of motors
OUT 49 Overload Protection is OFF
OUT 49 Overload Protection is BLOCKED
OUT 49 Overload Protection is ACTIVE
OUT 49 Overload Current Alarm (I alarm)
OUT 49 Overload Alarm! Near Thermal Trip
OUT 49 Winding Overload
OUT 49 Thermal Overload TRIP
SP >49 Reset of Thermal Overload Image
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
1.0 Kt-FACTOR when motor
stops
100 sec Emergency time
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
. It can be
Nom sec