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Technical Data
4.11 Motor Restart Inhibit
4.11
Motor Restart Inhibit
Setting Ranges / Increments
Motor starting current relative to nominal motor current
/I
I
Start
Motor Nom.
Nominal motor current
I
Motor Nom.
Max. permissible starting time T
Equilibrium time T
Minimum inhibit time T
Maximum permissible number of warm startups n
Difference between cold and warm startups n
Extension of Time Constant at stop k
Extension of Time constant at running k
Restart Threshold
Where:
Tolerances
Restart inhibit time
Trip on rotor overload
Influencing variables
Power supply direct voltage in range 0.8 ≤ V
Temperature in range –5 °C ≤ Θ
Frequency in the range from 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Frequency outside range of 0.95 ≤ f/f
386
START max.
Equal
MIN. INHIBIT TIME
τ at STOP
τ at RUNNING
Θ
= Temperature limit below which restarting is possible
RESTART
k
= k-factor for the rotor
R
= Startup current
I
STARTUP
I
= Motor nominal current
MotNom
T
= Max. startup time
start max
τ
= Thermal rotor time constant
R
n
= Max. number of cold starts
cold
≤ 55 °C
amb
≤ 1.05 (f
Nom
≤ 1.05
Nom
1.1 to 10.0
for I
= 1 A 0.20 A to 1.20 A
Nom
for I
= 5 A 1.00 A to 6.00 A
Nom
1 s to 320 s
0.0 min to 320.0 min Increments 0.1 min
0.2 min to 120.0 min Increments 0.1 min
1 to 4
WARM
- n
1 to 2
COLD
WARM
0.2 to 100.0
0.2 to 100.0
5 % or 2 s
5 % or 2 s
≤ 1.15
/V
PS
PSNom
= 50 Hz or 60 Hz)
Nom
E50417-G1140-C344-A5, Release date 11.2012
Increment 0.1
Increment 0.01 A
Increments 1 s
Increment 1
Increment 1
Increment 0.1
Increment 0.1
1 %
0.5 %/10 K
1 %
Increased tolerances
SIPROTEC, 7SK80, Manual
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