ABB REM 610 Technical Reference Manual page 130

REM 610 REM 610
130
Motor Protection Relay
Technical Reference Manual - ANSI Version
t/s
50
40
30
20
10
5
4
3
2
1.05
1
1 2
Fig. 6.1.2.2.-1 Selected safe stall time 30 s
Example:
Start-up current of the motor
Start-up time of the motor
One hot start allowed
Ambient temperature
At an ambient temperature of 20°C the internal FLA is 1.09 x FLA of the
motor. Thus, the start-up current of the motor is 6.2/1.09 = 5.69 x the internal
FLA.
2.5
3 4 5 6 8
6.2 x FLA
11 s
20°C
1MRS755537
t
6x
[s]
120
60
30
20
15
10
5
10
I/I
n
A051487