Motor Restart Inhibit - Siemens SIPROTEC 4 User Manual

4.12

Motor Restart Inhibit

Setting Ranges / Increments
Motor starting current relative to nominal motor current
/Ι
Ι
Start MotorNom
Nominal motor current
Ι
MotorNom
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:
Influencing Variables
Power supply direct voltage in range 0.8 ≤ V
Temperature in range 23.00 °F (-5 °C) ≤ Θ
Frequency in range 25 Hz to 70 Hz
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
START Max.
Equal
MIN. INHIBIT TIME
τ STILLSTAND
τ BETRIEB
Θ = Temperature limit below which restarting is possible
RESTART
k = k-factor for the rotor
D
= Startup current
Ι
STARTUP
= Motor nominal current
Ι
MOTNom
T = Max. startup time
start max
τ = Thermal rotor time constant
R
n = Max. number of cold starts
Cold
PS
amb
1.1 to 10.0
for Ι = 1 A 0.20 A to 1.20 A
Nom
1.00 A to 6.00 A
for Ι = 5 A
Nom
1 s to 320 s
0.0 min to 320.0 min
0.2 min to 120.0 min
1 to 4
WARM
- n 1 to 2
COLD WARM
0.2 to 100.0
0.2 to 100.0
/V ≤ 1,15
PSNom
≤ 131.00 °F (55 °C)
Technical Data
4.12 Motor Restart Inhibit
Increments 0.1
Increments 0.01 A
Increments 1 s
Increments 0.1 min
Increments 0.1 min
Increments 1
Increments 1
Increments 0.1
Increments 0.1
1 %
0.5 %/10 K
1 %
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