Siemens SIPROTEC 7SK80 User Manual

Technical Data
4.10 Motor Starting Protection 48
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
370
4.10 Motor Starting Protection 48
Setting Ranges / Increments
Trip Curve
Dropout Ratio
Tolerances
Influencing variables
Startup current of the
motor I
STARTUP
for I
Nom
= 1 A 0.50 A to 16.00 A Increment 0.01 A
for I
Nom
= 5 A 2.50 A to 80.00 A
Pickup threshold I
MOTOR START
for I
Nom
= 1 A 0.40 A to 10.0 A Increment 0.01 A
for I
Nom
= 5 A 2.00 A to 50.00 A
Permissible startup time T
Max.STARTUP
1.0 s to 180.0 s Increments 0.1 s
Permissible locked rotor time T
LOCKED ROTOR
0.5 s to 180.0 s or ∞ (disabled) Increments 0.1 s
Maximum startup time with warm motor
T
Max.STARTUP W
0.5 s to 180.0 s or ∞ (disabled) Increments 0.1 s
Maximum startup time with cold motor 0 % to 80 % or ∞ (disabled) Increments 1 %
Dropout ratio Approx. 0.95
Pickup threshold 3 % of setting value or 15 mA for I
N
= 1 A, or 75 mA for I
N
= 5 A
Time delay 5 % or 30 ms
Power supply direct voltage in range 0.8 ≤ V
PS
/V
PSNom
≤ 1.15 1 %
Temperature in range –5 °C ≤ Θ
amb
≤ 55 °C 0.5 %/10 K
Frequency in range of 0.95 ≤ f/f
Nom
≤ 1.05 1 %
Frequency outside range of 0.95 ≤ f/f
Nom
≤ 1.05 Increased tolerances
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1%
1%

Siemens SIPROTEC 7SK80 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SK80
Category	Protection Device
Language	English