Setting Example - Siemens SIPROTEC 7SJ62 Handbuch

6

Setting Example

General
Motor data
1st step
2nd step
32
The following examples aim to depict the most important settings for the protection of
explosion proof motors of protection type increased-safety "e".
A detailed description of all parameters and their setting ranges and ex-factory
settings is given in Chapter 2 of the corresponding manuals.
We assume the following motor data to be given:
Type of motor
Performance
Voltage
Current
Power factor
Frequency
Speed
Starting current
Locked-rotor time
Transformer current
Transformation ratio
Short-circuit protection
Parameter 1202 50-2 PICKUP =
Parameter 1203 50-2 DELA =
Unbalanced load protection
The basic settings are commonly used.
Parameter 4002 46-1 PICKUP =
Parameter 4003 46-1 DELAY =
Parameter 4004 46-2 PICKUP =
Parameter 4005 46-2 DELAY =
Effective motor protection against phase failure and asymmetric load is achieved by
overcurrent protection of the ground system.
Parameter 1304 50N-1 PICKUP =
Parameter 1305 50N-1 DELAY =
Including certificate of
explosion-safety
P 1400 kW
V 6 kV
N L-L
I 160 A
N
cos ϕ 0.84
f 50 Hz
n 2980 1/min
I /I 5.2
start nominal
t 8.2 s
E
I 200 A
Motor nom
t 200 : 1
6.50 A
0.10 s
0.10 A
5 s
0.50 A
1.5 s
0.20 A
0.00 s
pickup value of the high-set stage
50-2 pickup for the phase
currents
trip time delay of the high-set
stage 50-2 delay
pickup value of stage 46-1 pickup
trip time delay of stage 46-1 delay
pickup value of stage 46-2 pickup
trip time delay of stage 46-2 delay
pickup value of the overcurrent
stage 50N-1 pickup for the
ground system
trip time delay for the ground
system 50N -1delay
7SJ62/63/64 Additional Information
C53000-B1174-C170-1