Start Inhibit For Motors (66/68) - Siemens SIPROTEC 7SJ62 Instruction Manual

Technical Data

10.11 Start Inhibit for Motors (66/68)

Setting Ranges /
Resolutions
Restarting Limit
10-30
Starting Current
Relative to Nominal Motor Current
Nominal Motor Current
Maximum Permissible
Starting Time
Temperature
Equalization Time
Maximum Permissible
Number of Warm Starts
Difference between
Cold and Warm Starts
Extension K-Factor for
Cooling Simulations of
Rotor at Rest
1
) For I = 1 A, divide all limits by 5.
N
I /I 3.0 to 10.0
Start Motor nom
I 1.0 A to 6.0 A
Motor nom
T 3 s to 120 s
Start Max
T 0.0 min to 60.0 min
Equal
n 1 to 4
warm
n - n 1 to 2
cold warm
kτ-Factor 1 to 10
Θ
RESTART
Where:
Θ
Restart
Θ
Rot.max.perm
n
Cold
(Increments 0.1)
1
) (Increments 0.5 A)
(Increments 1 s)
(Increments 0.1 min)
(Increments 1)
(Increments 1)
(Increments 1)
n
COLD
Θ ⋅
= -------------------------- -
Rot.max.perm
n
COLD
Temperature limit below
which restarting is possible
maximum permissible motor
over-temperature (= 100 % in
operating measured value
Θ
/Θ )
Rot Rot trip
Number of permissible
restarts from cold state
7SJ62 Manual
C53000-G1140-C121-1
1
)
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