Lenze MDxMA-MHxMA-MFxMA-MDERA-MHERA Three-phase AC motors - Manual (Page 42)

Commissioning and operation
Important notes
7
l
42 BA 33.0005−EN 2.0
7 Commissioning and operation
7.1 Important notes
For trial run without output elements, lock the featherkey. Do not deactivate the
protective devices, not even in a trial run.
Check the correct operation of the brake before commissioning motors with brakes.
7.2 Before switching on
)
Note!
Before switch−on, you must ensure that the motor starts with the intended
direction of rotation.
Lenze motors rotate CW (looking at the driven shaft) if a clockwise three−phase
field L1
W U1, L2 WV1, L3 W W1 is applied.
Before initial commissioning, before commissioning after an extended standstill period, or
before commissioning after an overhaul of the motor, the following must be checked:
ƒ Measure the insulation resistance, in case of values
£1 kWper volt of rated voltage, dry
the winding.
ƒ Have all screwed connections of the mechanical and electrical parts been firmly
tightened?
ƒ Is the unrestricted supply and removal of cooling air ensured?
ƒ Has the PE conductor been connected correctly?
ƒ Have the protective devices against overheating (temperature sensor evaluation)
been activated?
ƒ Is the controller correctly parameterised for the motor?
(
, Controller operating instructions)
ƒ Are the electrical connections o.k.?
ƒ Does the motor connection have the correct phase sequence?
ƒ Are rotating parts and surfaces which can become very hot protected against
accidental contact?
ƒ Is the contact of good electrical conductivity if a PE connection on the motor housing
is used?