Sedgwick TA315 - Electrical Information and Troubleshooting; Electric Motors Troubleshooting

TA Operation/Maintenance Instructions Page 31 of 36
10.0 Electrical Information
M/c ref.
Supply
Motor
ref.
Kw
Starter
ref.
Rated
Current
Starting
Current
Require
d fuse
size
Cable
size
TA315-3/b
400-3-50
AMHES
100LAA
2-B3
3.0 S1
3SE007/L
K-Rev 1
6.5A
39A
20A/ph
2.5mm
TA315-1/b
230-1-50
AMMES
90L/A2
3.0 S1
3SE0013/
LK-Rev 1
18.7
70A
40A
4.0mm
10.1 Electric Motors: Trouble Shooting Checklist
Symptom
Check
THREE PHASE MOTORS
Machine does not start at all.
Isolator is switched to ON and all STOP buttons are out.
Overload button is reset.
Starter coil/contactor is operational.
There are no loose connections.
There are no fuses blown.
Supply is reaching the starter.
Supply is reaching the motor.
Voltage between the phases at starter and motor.
Motor runs but trips.
Overload setting in starter.
Current drawn without load applied.
Current drawn under load.
Supply voltage without load and on moment of switch on.
Allowed variation plus/minus 6%.
Supply voltage under load.
Supply voltage with motor off.
Supply to all three phases at isolator, starter and at motor.
Note that it is possible for 3 phase machines to operate
with only 2 phases of the supply. This is known as single
phasing. Check all fuses.
Motor attempts to start then
trips.
The machine is not jammed, and the spindle is free to
rotate.
Winding resistance of each motor phase (values should all
balance).
Insulation resistance between windings and earth.
The correct cable size has been used to install the
machine (long runs of cable can cause voltage drop).
SINGLE PHASE MOTORS
Machine does not start at all.
Isolator is switched to ON and all STOP buttons are out.
Overload is reset.
Starter coil/contactor is operational.
The fuse isn’t blown.
There are no loose connections.
Supply is reaching the starter.
Supply is reaching the motor.