SEW-Eurodrive MOVI-SWITCH 1E, Руководство по эксплуатации

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9
Service
Motor malfunctions
Operating Instructions – Explosion-Protected MOVI-SWITCH
®
Drives
42
9.2 Motor malfunctions
Fault Possible cause Measure
Motor does not start up Supply cable interrupted Check the connections and (intermediate) ter-
minal points, correct if necessary
Brake does not release See "Brake malfunctions"
Supply cable fuse has blown Replace fuse
Motor protection (switch) has
triggered Check that the motor protection (switch) is set
correctly; current specification is on the name-
plate
Motor protection does not trip Check motor protection control
Malfunction in control or in the
control process Observe the switching sequence; correct if
necessary
Motor only starts with
difficulty or does not
start at all Motor power designed for delta
connection but connected in star Correct the connection from star to delta; fol-
low the wiring diagram
Motor power designed for star-star
connection but only connected in
star Correct the connection from star to star-star;
follow the wiring diagram
Voltage or frequency differs con-
siderably from the setpoint, at
least when switching on the motor Provide better power supply system; reduce
the power supply load;
Check cross section of supply cable, replace
with cable of larger cross section if necessary
Motor does not start in
star connection, only in
delta connection Star connection does not provide
sufficient torque If the delta inrush current is not too high (ob-
serve the regulations of the power supplier),
start up directly in delta;
Check the project planning and use a larger
motor or special design if necessary. Contact
SEW-EURODRIVE.
Contact fault on star/delta switch Check the switch, replace if necessary;
Check the connections
Incorrect direction of
rotation Motor connected incorrectly Swap two phases of the motor supply cable
Motor hums and has
high current consump-
tion Brake does not release See "Brake malfunctions"
Winding defective Send motor to specialist workshop for repair
Rotor rubbing Send motor to specialist workshop for repair
Fuses blow or motor
protection trips immedi-
ately Short circuit in the motor supply
cable Eliminate short circuit
Supply cables connected incor-
rectly Correct the wiring, observe the wiring diagram
Short circuit in the motor Send motor to specialist workshop for repair
Ground fault on motor Send motor to specialist workshop for repair
25988670/EN – 04/2020