Motorprotection (Motor Starting Protection 48, Motor Restart Inhibit 66, Loadjam); Settings - Siemens SIPROTEC 7SJ61 Manual

Functions
2.6 Motor Protection
2.6.4 Motorprotection (Motor Starting Protection 48, Motor Restart Inhibit 66,
LoadJam)

2.6.4.1 Settings

The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec-
ondary nominal current of the current transformer.
Addr. Parameter
4101 FCT 48/66
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
4311 ROTOR OVERLOAD
4401 Load Jam Prot.
122
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
ON
OFF
Alarm Only
OFF
ON
Alarm Only
Default Setting
OFF 48 / 66 Motor (Startup
Monitor/Counter)
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 Con-
stant at Stop
2.0 Extension of Time Con-
stant at Running
6.0 min Minimum Restart Inhibit
Time
ON Rotor Overload Protection
OFF Load Jam Protection
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
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