Motorprotection (Motor Starting Protection 48, Motor Restart Inhibit 66, Loadjam); Settings - Siemens SIPROTEC 4 User Manual

[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,
2.8.4
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.
2.8.4.1

Settings

The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary nominal current of the current transformer.
Addr. Parameter
4101 FCT 48
4102 STARTUP CURRENT
4103 STARTUP TIME
4104 LOCK ROTOR TIME
4105 STARTUP T WARM
4106 TEMP.COLD MOTOR
4301 FCT 66
4302 IStart/IMOTnom
4303 T START MAX
4304 T Equal
4305 I MOTOR NOMINAL
4306 MAX.WARM STARTS
4307 #COLD-#WARM
4308 Kτ at STOP
4309 Kτ at RUNNING
4310 T MIN. INHIBIT
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
C Setting Options
OFF
ON
1A 0.50 .. 16.00 A
5A 2.50 .. 80.00 A
1.0 .. 180.0 sec
0.5 .. 180.0 sec; ∞
0.5 .. 180.0 sec; ∞
0 .. 80 %; ∞
OFF
ON
1.10 .. 10.00
1 .. 320 sec
0.0 .. 320.0 min
1A 0.20 .. 1.20 A
5A 1.00 .. 6.00 A
1 .. 4
1 .. 2
0.2 .. 100.0
0.2 .. 100.0
0.2 .. 120.0 min
Default Setting Comments
OFF 48 Startup Time Supervi-
sion for Motors
5.00 A Startup Current
25.00 A
10.0 sec Startup Time
2.0 sec Permissible Locked Rotor
Time
10.0 sec Startup Time for warm
motor
25 % Temperature limit for cold
motor
OFF 66 Startup Counter for
Motors
4.90 I Start / I Motor nominal
10 sec Maximum Permissible
Starting Time
1.0 min Temperature Equalizaton
Time
1.00 A Rated Motor Current
5.00 A
2 Maximum Number of
Warm Starts
1 Number of Cold Starts -
Warm Starts
5.0 Extension of Time Constant
at Stop
2.0 Extension of Time Constant
at Running
6.0 min Minimum Restart Inhibit
Time
Functions
2.8 Motor Protection
161