Eaton EMR-3MP0 - Page 162

multiples of FLA
t [s]
MotorStart_F07
Note: I is a
combination of
positive (I
1
)and
negative (I
2
)
sequence
motor currents
Max. allow.
locked-rotor
amperes :
6.1 times full-
load amperes
Stall time:
15 Sec.
Instantaneous
overcurrent:
12 times full-
load amperes
Instantaneous
overcurrent:
start delay set
for2 cycle
Motor starting current
(locked rotor condition)
6.1 times
full-load amperes
J am start delay
15 Sec.
J am trip level
180% full-load
amperes
Underload
start delay
20 Sec.
Underload run
delay: 5 Sec.
with load
Motor running
with load
Underload
trip level
60% full-load
amperes
Stator winding
temperature
(trip) function
is set point
Stator temperature
measured directly
Fig. 41: Motor Protection Curve (Example 2 – with RTDs).
162 www.eaton.com EMR-3MP0
4 Protective Elements
4.4 Ultimate Trip Current