Motor Restart Inhibit 66 - Siemens siprotec SJ62 User Manual

4.12

Motor Restart Inhibit 66

Setting Ranges / Increments
Restart Threshold
Influencing Variables
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Motor starting current relative to Nominal
Motor Current
/I
I
START Motor Nom
Nominal Motor Current
I
Motor Nom
Max. Permissible Starting Time
T
Start Max
Equilibrium Time
T
Equal
Minimum Inhibit Time
T
MIN. INHIBIT TIME
Maximum Permissible Number of Warm
Starts
n
WARM
Difference between Cold and Warm Starts
n – n
Cold Warm
Extension K-Factor for Cooling Simula-
tions of Rotor at Rest
k
τ at STOP
Extension Factor for Cooling Time Con-
stant with Motor Running k
Where:
Power Supply DC Voltage in Range
0,8 ≤ V ≤ 1.15
/V
PS PSNom
Temperature in Range
23 °F (–5 °C) ≤ Θ ≤ 131 °F (55 °C)
amb
Frequency in Range fN ± 5 Hz
Frequency out of Range
± 5 Hz
f
Nom
1.1 to 10.0
for I = 0.20 A to 1.20 A
Nom
1 A
for I = 1.00 A to 6.00 A
Nom
5A
3 s to 320 s
0.0 min to 320.0 min
0.2 min to 120.0 min
1 to 4
1 to 2
0.2 to 100.0
0.2 to 100.0
τRUNNING
Θ
Restart
ing is possible
k = k-factor for rotor
R
= Startup current
I
Start
= Basic current
I
B
T
start max
τ
= Thermal rotor time constant
R
n = Max. number of cold starts
cold
1 %
0.5 %/10 K
1 %
Increased Tolerances
4.12 Motor Restart Inhibit 66
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
= Temperature limit below which restart-
= Max. startup time
488