18
Maintenance and service guide - LSPX-FLSPX ZONE
21 - Ex tb – LSES-FLSES ZONE
22 - Ex tc
5725 en - 2020.02 / c
INSTALLATION AND MAINTENANCE - LSPX-FLSPX ZONE 21 - Ex tb – LSES-FLSES ZONE 22 - Ex tc
9 - MAINS CONNECTION
9.1 - Terminal box
If the threaded hole(s) of the orifice(s) intended to receive
cable gland(s) or conduit(s) have/has ISO metric threads,
there is no specific marking present on the motor. If the type of
thread is different or mixed, the type(s) are marked on the
equipment.
It is placed as standard on top and at the front of the motor. It
offers an IP 65 degree of protection and is equipped with cable
glands.
Caution: the position of the terminal box cannot easily be
changed, even with flanged motors, as the condensation drain
holes (if present) must be at the bottom.
Cable gland
The standard position of the cable gland is on the right when
viewed from the drive end (1).
If the special position of the cable gland has not been correctly
specified on the order, or is no longer suitable, the symmetrical
construction of the terminal box enables it to be turned in 4
directions except for position (2) for motors with smooth holed
flanges (B5).
A cable gland must never open upwards.
Check that the incoming cable bend radius prevents water
entering via the cable gland.
Terminal box positions
Cable gland positions
Cable size
Match the cable gland and any associated expander
or reducer to the diameter of the cable used, in
accordance with the specific instructions for the cable
gland.
In order to maintain the motor’s original IP protection, it
is essential to ensure leak-tightness between the rubber
ring and the cable by tightening the cable gland correctly
(so that it cannot be unscrewed by hand).
Unused cable glands must be replaced by threaded
plugs.
Unused orifices must also be blocked off using threaded
plugs. It is essential to ensure that the fitting of cable
glands or blanking devices is carried out with a silicone
or polyurethane sealant seal being made between the
cable glands, the plugs, the reducers and (or) expanders,
the support or the box body.
Installers are responsible for ensuring that the
leak-tightness of cable passages is achieved (see
the motor nameplate and the cable gland fitting
instructions).
Motors are factory- fitted with warning labels
which must be kept legible.
NE PAS OUVRIR SOUS TENSION
NE PAS OUVRIR SI UNE ATMOSPHERE
EXPLOSIVE PEUT ETRE PRESENTE
DO NOT OPEN WHEN ENERGIZED
DO NOT OPEN WHEN AN EXPLOSIVE
ATMOSPHERE MAY BE PRESENTE
AVERTISSEMENT
WARNING
ref. HS51A
31
PSI070EA050
Under no circumstances must the cable be
used for handling the motor.
9.2 - Connection to the electrical
supply:
Connection to external power circuits must be in accordance
with requirements of the standard IEC/EN 60079-14 and the
regulations that are in force.
Alternatively, with integral cables the motor connection must
either be made outside the explosive atmosphere, or protected
by a protection method that is suitable for the application (gas
and/or dust) and the temperature class which corresponds at
least to that of the location of the equipment (see the information
on the nameplate).
If the motor is supplied with a cable gland support plate or un-
drilled conduits:
- the drilling diameter of the smooth holes for cable glands or
conduits must not be greater than the diameter of the thread of
the cable gland or c 2 mm (for “ec” boxes) or + 0.7 mm
(for “tc” boxes) and must be de-burred (broken angles about
0.5 mm x 45°) on each side of the thin plate.
- the installation of cable glands or conduit entry glands by the
installer must ensure that the degree of safety (preservation of
the explosion-proof character and/or of the IP) required by the
application (gas and/or dust) and the motor temperature class
is preserved.
If the motor is supplied with drillings but without cable or conduit
glands:
- the installation of cable glands or conduit entry glands by the
installer must ensure that the degree of safety (IP) required by
the application and the motor temperature class is preserved.
A
Standard
position
2
4
1
3
Standard
position
