Eaton EMR-3MP0 - Page 161

multiples of FLA
t [s]
MotorStart_F06
Ultimate trip
level: 100%
full-load amperes
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
for 2 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.
Motor running
with load
Underload run
delay: 5 Sec.
Underload
trip level
60% full-load
amperes
Fig. 40: Motor Protection Curve (Example 2 – without RTDs).
Motor Protection Curve (Example 3 - with RTDs)
161www.eaton.comEMR-3MP0
4 Protective Elements
4.4 Ultimate Trip Current