Commissioning; Maintenance - Siemens 1FT5 062 Manual Del Usuario

2.4.2 Encoder and PTC thermistor connections
The encoder system and the PTC thermistor are connected via the signal
connector. Take note of the specifications on the rating plate and the
circuit diagram. The PTC thermistor installed in the overhang only works
as a motor trip in combination with the corresponding tripping unit (e.g.
3UN... ).
2.4.3 Brake connections
The brake is connected via the terminal box or a plug connector. The fail-
safe permanent-magnet holding brake operates according to the closed-
circuit principle. It is released when a current of 24 V DC ± 10% from the
two-pulse bridge connection is applied. The voltage must be between the
specified tolerance limits, otherwise reliable operation may be at risk.
When the motor is switched on, the brake must always be energized, i.e.
released. When the brake is switched off (de-energized), or if there is a
power failure, the brake hub is pulled towards the magnet, thus preventing
the motor shaft from moving.
NOTE: In the event of a power failure, the motors can be decelerated by
means of rheostatic short-circuit braking. In this case, the short-circuit
current must be connected across the R
"SIMODRIVE 1FT5".

2.5 Commissioning

Before putting the motor into operation, check that
- the rotor can be turned without touching the stator (release brake if
necessary);
- the motor is properly fixed and aligned;
- the drive components are correctly adjusted (e.g. belt tension on belt
drive, etc.);
- all electrical connections and connectors match the specifications and
are properly tightened;
- the protective earth is properly connected;
- all attachments (e.g. separately driven fan, brake, etc.) are operational;
appropriate measures have been taken to prevent contact with live parts;
- the maximum speed, if specified (see rating plate), cannot be exceeded.
After installing the motor, check that the brake
(if fitted) works properly! The brake is only
designed to carry out a limited number of
emergency braking operations. It must not be used as a regular
service brake.
This list may be incomplete. Other checks may also be necessary.
Adjustments
If the rotor needs to be turned while the motor is switched off, the brake
must be energized (24 V DC ± 10%, check for correct polarity!), i.e. the
brake must be released.
Facility for attaching encoder
(e.g. ROD 426, absolute value encoder)
If no encoder is to be attached, the coupling for
the encoder (e.g. B. 8.920, Fig. 3) must be
removed before operating the motor.
The cover cap on the pulse generator centring hole in the flange (8.910-
Fig.á 3) is for transport purposes only - degree of protection IP50. The
degree of protection of the motor indicated on the rating plate applies only
with the encoder attached.
Siemens AG
ENGLISH
resistors, see description of
opt
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Maintenance

Safety precautions
Before carrying out any work on the motor
or unit, and especially before uncovering
live parts, disconnect the motor from the
power supply. Remember to disconnect any supplementary
or auxiliary circuits as well as the main circuits.
The standard "5 safety rules" according to DIN VDE 0105
apply:
- Disconnect from the power supply
- Secure against reconnection
- Check that equipment is dead
- Earth and short-circuit
- Cover or screen off all live adjacent parts
The above actions may only be reversed when all repair work
has been completed and the motor has been completely re-
assembled.
The system must be disconnected from the
power supply before any work is carried
out! Due to the fact that the motors contain
permanent magnets, a voltage is generated at the motor terminals
when the motor is turned.
Replacing the bearings, types of grease
We recommend that the bearings be replaced after approx. 20,000 hours
of operation or after 3 years at the latest. The motors have permanently
lubricated bearings with radial clearance C3 and seals or covers at both
ends. The bearings must be suitable for operation at temperatures
between -10°C and +150°C.
Types of grease for standard motors: UNIREX N3 (Esso); replacement
grease must conform to DIN 51825/K3N.
NOTE: When replacing bearings, the new bearings should have
good seals which match the quality of the original bearings. Check
the bearing inscription and orientation of D-end and N-end bearings!
We recommend that replacement bearings be ordered from the
manufacturer so that special requirements such as bearing clearance
and/or seal material can be taken into account.
Note on Maintenance
We recommend that repair work be carried out by a SIEMENS
Service Center!
A maintenance manual with detailed instructions for qualified
personnel (for definition of qualified personnel, see DIN VDE 0105
or IEC 364) can be ordered from the manufacturer under
Order No. 610.43098.02
Edition: GERMAN-ENGLISH
This maintenance manual contains instructions for removing/
installing
- the separately driven fan
- the encoder systems (tachogenerator+ rotor position encoder,
resolver, ROD 320, ROD 426, absolute value encoder)
- the motor rotor, including bearing replacement
- the motor rotor, including bearing replacement for motors with
brake
- adjustment of the tachogenerator and the rotor position encoder.
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