TECO JNEV-202~203-H1 - Figure 5-5 Motor Overload; Overheating Diagnostics

Chapter 5 Trouble shooting and maintenance
5-12
Motor is overheated
Motor runs unevenly
Is the measured load or
the current exceeding
the configured value?
Reduce the load
Increase ratings of EV and the
motor
Select a different motor
EV fault
Correct bad connection
Clear the debris
Bad connection between EV
and the motor
I
s
EV
runn
i
ng
in low speed
for a long time
?
Are voltages between
p
hase even?
Is there any de
b
ris
p
reventing cooling
the motor?
YES
YES
YES
YES
YES (measured within +-3% of output
l
)
N
O
N
O
N
O
Does it occu
r
when
accelerating/
decelerating?
Is the load
freewheeling?
Any vibration or
backlash in the
g
ears
Is the
acceleration/deceler
ation time correct
for the a
pp
lication?
Increase the acc/dec time
Reduce the load
Increase or ratings for
7300EV and the motor
EV faults
•Reduce the freewheeling or
add a flywheel
Improve the mechanical system
EV Faults
YES (measured within +-3% of rated output voltage)
YES
YES
YES
N
O
N
O
N
O
N
O
Small
Large
A
re output vo
l
tages
between
balanced?
No
Figure5-5 Motor Overload/Overheating Diagnostics
Figure5-6 Oneven Speed Operation Diagnostics