10
PREVENTIVE MAINTENANCE
Installation guide FFB brake motors
5286 en - 2017.09 / c
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 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
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
: température maximale de surface.
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
D21containing 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.
