4
INSTALLATION AND MAINTENANCE
GEARLESS Z2 - Z3
A.C. Drive for elevators
LEROY-SOMER
3862 en - 07.2004 / a
4 - COMMISSIONING
BEFORE INSTALLATION
If the equipment has been stored for several months, it is
essential to check the following:
- the cleanliness of the interior and that there is no
condensation
- correct insulation between the phases and the earth terminal
on the motor (minimum 100M
Ω
at 500 V D.C. for 60 seconds)
after having disconnected all the electronic circuits if
necessary.
WARNING:
do not apply the megohmmeter to the terminals
of the thermal sensors as this may damage them.
If the required value is not reached, dry using internal or
external heating.
Drying using external heating
- place the motor in an oven at 70°C for at least 24 hours until
the correct insulation is achieved. (100M
Ω
)
- Take care to increase the temperature gradually to clear the
condensation.
- After drying, during the cooling phase, check the insulation
value regularly, as it will initially tend to fall then rise.
Drying using internal heating
- Test to be carried out with the brakes released.
- Connect motor windings V and W in parallel in relation to U.
(see drawing below)
- Read off the resistance between U and V//W.
- Apply a
low voltage
D.C. current to them (to obtain 10% of
the rated current calculated using the resistances of the
winding), increase the voltage until 50% of the rated current
is reached.
- Maintain the power for 4 hours. The temperature of the
motor should increase slightly.
CAUTION: The pulley will move slightly on power-
up (angular setting of the rotor in relation to the
stator).
4.1 - INSTALLATION
The installation must comply with the characteristics of the
motor indicated on the nameplate (see section 1).
It must include electrical safety devices.
Check that the handling equipment (slings, etc.) are suitable
for the weight of the machine.
Use the attachment points provided on the machine.
Check that the cables are correctly positioned so that they are
not damaged.
Provide the necessary mechanical protection devices to
prevent people working on the machine becoming caught or
trapped by the pulley and/or the cables.
The motors must be installed in such a way that the cooling
air (not too damp, dust-free, and containing no vapour or
corrosive gas) circulates freely.
4.1.1 - Cleaning
- Release the brake using the manual release system.
- Remove the protective varnish from the pulley grooves.
CAUTION: Do not use abrasive equipment. Use
only a cloth soaked in alcohol. Care must be taken
not to get any alcohol or grease on the brake disk.
WARNING:
use the alcohol in a well ventilated area.
Z2-Z3 Fabricated steel shield
Motor connection for drying the winding
Phase connection
Power supply (-)
U
Power supply (+)
V + W (serial)
Anchoring points
for lifting
Fixing screws
Summary of Contents for GEARLESS Z2
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