Motor Starting Time Supervision - Siemens 7SK80 Manual

4.10

Motor Starting Time Supervision

Setting Ranges / Increments
Startup current of the
motor I
STARTUP
Pickup threshold I
Permissible startup time T
Permissible locked rotor time T
Maximum startup time with warm motor
T
Max.STARTUP W
Maximum startup time with cold motor
Trip Curve
Dropout Ratio
Dropout ratio
Tolerances
Pickup threshold
Time delay
Influencing variables
Power supply direct voltage in range 0.8 ≤ V
Temperature in range –5 °C ≤ Θ
Frequency in the range from 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Frequency outside range of 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
for I = 1 A 0.50 A to 16.00 A
Nom
for I = 5 A 2.50 A to 80.00 A
Nom
for I = 1 A 0.40 A to 10.0 A
MOTOR START Nom
for I = 5 A 2.00 A to 50.00 A
Nom
Max.STARTUP
LOCKED ROTOR
Approx. 0.95
3 % of setting value or 15 mA for I
5 % or 30 ms
≤ 55 °C
amb
≤ 1.05 (f
Nom
≤ 1.05
Nom
1.0 s to 180.0 s
0.5 s to 180.0 s or ∞ (disabled)
0.5 s to 180.0 s or ∞ (disabled)
0 % to 80 % or ∞ (disabled)
Nom
≤ 1.15
/V
PS PSNom
= 50 Hz or 60 Hz)
Nom
Technical Data
4.10 Motor Starting Time Supervision
Increment 0.01 A
Increment 0.01 A
Increments 0.1 s
Increments 0.1 s
Increments 0.1 s
Increments 1 %
= 1 A or 75 mA for I = 5 A
Nom
1 %
0.5 %/10 K
1 %
Increased tolerances
1 %
1 %
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