Motor Restart Inhibit - Siemens SIPROTEC 7SJ62 Manual

4.12

Motor Restart Inhibit 66

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:
Influencing Variables
Power supply direct voltage in range 0.8 ≤ V
Temperature in range 23.00 °F (-5 °C) ≤ Θ
Frequency in range f
Frequency outside range f
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
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
= Motor nominal current
I
MotNom
T = Max. startup time
start max
τ
= Thermal rotor time constant
R
n = Max. number of cold starts
cold
PS
amb
± 5 Hz
Nom
± 5 Hz
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
3 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
≤ 1.15
/V
PSNom
≤ 131.00 °F (55 °C)
Technical Data
4.12 Motor Restart Inhibit 66
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
507