10
REGULAR SERVICING
Installation guide FFB brake motors
5286 en - 2019.10 / d
4 - REGULAR SERVICING
- Checks after start-up
After approximately 50 hours’ operation, check that the screws
fixing the motor and the coupling device are still tight. In the
case of chain or belt transmission, check that the tension is
correctly adjusted. Check the electrical connections. Check the
vibrations. Check that there is no abnormal noise. If the brake
wear needs to be checked: measure that the clearance is lower
than the max dimension authorised. (see the “Adjusting the air
gap” procedure in section 4.4 ref. 5287 FFB maintenance)
- Preventive maintenance visit
- Check regularly that the recommendations concerning
mechanical and electrical installation are still complied with.
- Inspect the seals.
- Remove any dust or foreign bodies which might clog the
cover grille and the housing fins.
- Lubricate the bearings of the motors fitted with grease
nipples.
- Cleaning
Precautions to be taken: before carrying out any cleaning
operation, check that the brake motor is totally sealed
(terminal box, drain holes, etc).
Dry cleaning (vacuuming or compressed air) is always
preferable to wet cleaning.
To ensure the brake motor operates correctly, remove any
dust or foreign bodies that might
clog the brake moving
parts
, the cover grille and the housing fins.
Always clean at reduced pressure (< 10 bars)
from the center of the brake motor outwards to
avoid introducing dust and particles under the
seals.
- Draining condensation water
Temperature variations cause condensation to form
inside the
motor, which must be removed before it adversely affects
motor operation.
Condensation drain holes, located at the bottom of the motors
(bearing in mind their operating position) are sealed with plugs
that must be removed and then replaced every six months (if
they were not replaced, the motor degree of protection would
no longer be maintained). Clean the orifices and plugs before
reassembling them.
Note: In conditions of high humidity and significant temperature
variations, a shorter period is recommended.
When there is no risk to the motor protection, the condensation
drain plugs can be removed.
5 - PREVENTIVE MAINTENANCE
Before any intervention or operation for
preventive or corrective maintenance, please,
download NECESSARILY the update version of
Maintenance guide reference 5287:
www.leroy-somer.com
Consult Nidec Leroy-Somer (www.leroy-somer.com: Services
/ Drive systems) who in its continuous search for ways to
help our customers, has evaluated numerous methods of
preventive maintenance.
6 - USE IN EXAT ZONE 22
The (F)LS(ES) brake motors preceded by Ex for
ATMOSPHERES CONTAINING EXPLOSIVE DUST describe
the special conditions for safe use.
Special marking (EXAT)
➉
(§1.1):
FFB250NU001
Mf :
52 Nm
S N° : 9999999/001
U : 180 VDC
I : 345 mA
Motor size : 168
Nmax : 3600 rpm
II 3 D Ex tc IIIB T125°C Dc
FFB 3
6.5 kg
II 3D Ex tc IIIB
: Group II, category 3, non-
conductive dusts
T125°C
: maximum surface temperature
Dc
: equipment protection level
Nmax 3600 rpm
: maximum rotation speed in
Exat
The brake must be assembled with a motor which respects
the same EXAT level requirements at least.
If the brake is not equipped with a release/application
indicator, check the clearance periodically according to
the rates and the energy to be dissipated on each braking
operation (see technical catalogue ref 5329 § Operation).
Those persons required to work on electrical installations and
equipment in zones where there is a risk of explosion must be
specially trained in the necessary skills.
In effect, they must be familiar not only with the electrical
risks, but also with those that are due to the chemical
properties and physical characteristics of products used in
the installation (gas, vapour, dust), as well as the environment
in which the equipment operates. These elements dictate the
risk of fire and explosion.
In particular, they must be informed and aware of the specific
safety reasons and requirements in order to adhere to them.
For example:
- do not open when powered up,
- do not open when powered up in atmospheres D21
containing explosive dust,
- do not repair when powered up,
- do not manoeuvre when on load,
- wait several minutes before opening,
- replace the seals tightly to ensure watertightness.
- Cleaning
The cleaning of the product must be done with a damp cloth
or by a means that does not cause friction on the paint. The
user must avoid the paint being loaded with static electricity.
