Siemens SIPROTEC 4, User Manual

Page: 477 / 734

Motor Restart Inhibit
Setting Ranges / Increments
Motor starting current relative to nominal motor current
Ι
Start
/
Ι
MotorNom
1.1 to 10.0 Increments 0.1
Nominal motor current
Ι
MotorNom
for Ι
Nom
= 1 A
0.20 A to 1.20 A Increments 0.01 A
for
Ι
Nom
= 5 A 1.00 A to 6.00 A
Max. permissible starting time T
START Max.
1 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 Increments 1
Difference between cold and warm startups n
COLD
- n
WARM
1 to 2 Increments 1
Extension of Time Constant at stop k
τ STILLSTAND
0.2 to 100.0 Increments 0.1
Extension of Time constant at running k
τ BETRIEB
0.2 to 100.0 Increments 0.1
Restart Threshold
Where: Θ
RESTART
= Temperature limit below which restarting is possible
k
D
= k-factor for the rotor
Ι
STARTUP
= Startup current
Ι
MOTNom
= Motor nominal current
T
start max
= Max. startup time
τ
R
= Thermal rotor time constant
n
Cold
= Max. number of cold starts
Influencing Variables
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 25 Hz to 70 Hz 1 %
4.12
Technical Data
4.12 Motor Restart Inhibit
SIPROTEC 4, 7SJ62/64, Manual 477
C53000-G1140-C207-8, Edition 08.2016