Siemens SIPROTEC 7SJ62 - Motor Restart Inhibit

Technical Data
4.12 Motor Restart Inhibit 66
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
507
4.12 Motor Restart Inhibit 66
Setting Ranges / Increments
Restart Threshold
Influencing Variables
Motor starting current relative to nominal motor current
I
Start
/I
Motor Nom.
1.1 to 10.0 Increment 0.1
Nominal motor current
I
Motor Nom.
for I
Nom
= 1 A 0.20 A to 1.20 A Increment 0.01 A
for I
Nom
= 5 A 1.00 A to 6.00 A
Max. permissible starting time T
START max.
3 s to 320 s Increments 1 s
Equilibrium time T
Equal
0.0 min to 320.0 min Increments 0.1 min
Minimum inhibit time T
MIN. INHIBIT TIME
0.2 min to 120.0 min Increments 0.1 min
Maximum permissible number of warm startups n
WARM
1 to 4 Increment 1
Difference between cold and warm startups n
COLD
- n
WARM
1 to 2 Increment 1
Extension of Time Constant at stop k
τ at STOP
0.2 to 100.0 Increment 0.1
Extension of Time constant at running k
τ at RUNNING
0.2 to 100.0 Increment 0.1
Where: Θ
RESTART
= Temperature limit below which restarting is possible
k
R
= k-factor for the rotor
I
STARTUP
= Startup current
I
MotNom
= Motor nominal current
T
start max
= Max. startup time
τ
R
= Thermal rotor time constant
n
cold
= Max. number of cold starts
Power supply direct voltage in range 0.8 ≤ V
PS
/V
PSNom
≤ 1.15 1 %
Temperature in range 23.00 °F (-5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C) 0.5 %/10 K
Frequency in range f
Nom
± 5 Hz 1 %
Frequency outside range f
Nom
± 5 Hz Increased Tolerances
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