[formel-lastsprung-motorbeispiel, 1, en_US]
The tripping delay time can remain at the default setting of 1 s. The warning threshold is set to 75% of the
tripping element (4404
I Alarm
≡ 0.95 A sec.).
The tripping delay time can remain at the default setting of 2 s.
In order to block the function during motor startup, the parameter 4406
T Start Blk.
is set to double
startup time (
T Start Blk.
= 2 · 8.5 s = 17 s).
Motorprotection (Motor Starting Protection 48, Motor Restart Inhibit 66,
LoadJam)
Functions relevant to Motor Protection and Restart Inhibit for Motors and Load Jam Protection are described in
the aforegoing two sections and contain information concerning configuration.
Settings
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary nominal current of the current transformer.
Addr.
Parameter
C
Setting Options
Default Setting
Comments
4101
FCT 48
OFF
ON
OFF
48 Startup Time Supervi-
sion for Motors
4102
STARTUP CURRENT
1A
0.50 .. 16.00 A
5.00 A
Startup Current
5A
2.50 .. 80.00 A
25.00 A
4103
STARTUP TIME
1.0 .. 180.0 sec
10.0 sec
Startup Time
4104
LOCK ROTOR TIME
0.5 .. 180.0 sec; ∞
2.0 sec
Permissible Locked Rotor
Time
4105
STARTUP T WARM
0.5 .. 180.0 sec; ∞
10.0 sec
Startup Time for warm
motor
4106
TEMP.COLD MOTOR
0 .. 80 %; ∞
25 %
Temperature limit for cold
motor
4301
FCT 66
OFF
ON
OFF
66 Startup Counter for
Motors
4302
IStart/IMOTnom
1.10 .. 10.00
4.90
I Start / I Motor nominal
4303
T START MAX
1 .. 320 sec
10 sec
Maximum Permissible
Starting Time
4304
T Equal
0.0 .. 320.0 min
1.0 min
Temperature Equalizaton
Time
4305
I MOTOR NOMINAL
1A
0.20 .. 1.20 A
1.00 A
Rated Motor Current
5A
1.00 .. 6.00 A
5.00 A
4306
MAX.WARM STARTS
1 .. 4
2
Maximum Number of
Warm Starts
4307
#COLD-#WARM
1 .. 2
1
Number of Cold Starts -
Warm Starts
4308
Kτ at STOP
0.2 .. 100.0
5.0
Extension of Time Constant
at Stop
4309
Kτ at RUNNING
0.2 .. 100.0
2.0
Extension of Time Constant
at Running
4310
T MIN. INHIBIT
0.2 .. 120.0 min
6.0 min
Minimum Restart Inhibit
Time
2.8.4
2.8.4.1
Functions
2.8 Motor Protection
SIPROTEC 4, 7SJ62/64, Manual
161
C53000-G1140-C207-8, Edition 08.2016
Summary of Contents for SIPROTEC 4
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