Leroy-Somer E27 Series, Установка и обслуживание

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7
INSTALLATION
E27 Gearless - Installation and maintenance
5323 en - 2018.04 / c
4.2 - Prolonged storage (> 3 months)
- Place the machine in a sealed waterproof enclosure with
a dehydrating bag inside corresponding to the volume to be
protected and the degree of humidity of the location.
- The bearings which can not be regreased must be replaced
after a storage longer than 3 years.
5 - INSTALLATION
5.1 - Before installation
If the equipment has been stored for several months, it is
essential to check the correct insulation between the phases
and the earth terminal on the motor (minimum 100 MΩ at
500 V D.C. for 60 seconds) after having disconnected all the
electronic circuits if necessary.
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 the motor 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 obtained (100 MΩ).
- Take care to increase the temperature gradually to clear the
condensation.
- After drying at ambient temperature during the cooling
phase, check the insulation value regularly, as it will initially
tend to fall, then rise.
Drying using internal heating (drawing 1)
- Connect motor windings V1 and W1 in parallel in relation
to U1.
- 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 winding resistances),
then 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.
If the brakes are released, the sheave will move
slightly on power-up (angular setting of the rotor in
relation to the stator).
U1
I
dc
< 50% In
U
dc
V1 W1
Drawing 1
Winding connections
for drying using
internal reheating
5.2 - General recommendation
The installation must comply with the motor characteristics
indicated on the nameplate (see section 1).
It must include electrical safety devices.
Check that the handling equipment (slings, etc.) is 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 sheave and/or the cables.
During building works, we recommend to protect the brakes
and micro-switches against dust (by wrapping them into a
shrink film for example). If the site is permanently subject to
dust, we recommend to fit the brakes cover available as an
option.
The motors must be installed in such a way that the cooling
air (not too damp, dust-free, and containing no corrosive
gases or vapors) circulates freely.
For the ease of access to the encoder, we recommend to
install the motor with a minimum distance of 200mm between
the cast iron cover protecting the encoder and the wall of the
elevator shaft.
5.3 - Mechanical installation
5.3.1 - Lifting the motor
Pic. 3 : Lifting the motor (for illustration only)
Weight of the motor (kg)
E27S E27M E27L
93 kg 106 kg 167 kg