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Maintenance and service guide - LSN-FLSN ZONE
2 - Ex ec
5724 en - 2020.02 / c
Adaptors (expanders or reducers) underneath plugs are
prohibited. 1 adaptor only is allowed per cable gland.
If the connection box is type “eb” and comprises one or more
threaded holes intended to receive cable glands, then unless
stated otherwise these threaded holes are of the “ISO” type.
Supply voltages and frequencies must comply with those
stated on the motor nameplate. Please contact us for all other
conditions relating to the power supply.
Make connections as per the coupling instructions on the
nameplate and the wiring diagram contained in the terminal
box. Check the direction of rotation of the motor (§9.4).
The choice of connection cables is determined by the current,
the voltage, the length and the temperature “T.cable” (if shown
on the motor nameplate).
The connection must meet the requirements of the installation
rules set by the standards and application of the regulations
that are in force. A qualified person must be responsible for the
connection, who will ensure:
* conformity of the connection box (protection mode Ex, IP, IK
etc...).
* conformity of the connection to the terminal block and
tightening torques.
* that the air gaps required by standards are observed; where
rotation is not prevented by the connection component, by the
barrel insulation of each power supply cable connector using
adhesive bonded heat-shrink sleeving. This sleeve must cover
the cable over a length of at least 15 mm. From each terminal
place the cables fitted with their connectors parallel to one
another in order to achieve the maximum insulation distances.
The fastenings used for connecting cables must be of the
same nature as the terminals (do not fit steel fastenings on
brass terminals, for example).
When the motor is equipped with an auxiliary fan, this must be
of a type that is certified for the group, the application (Gas and/
or dust) and the temperature class that corresponds at least to
that of the main motor. The supplies to both motors must be
connected such that energisation of the main motor must be
dependent on energisation of the auxiliary motor. Stopping the
auxiliary motor must cause de-energisation the main motor.
The installation must include a device which prevents the main
motor from operating if there is no ventilation.
Do not connect the motor if you are unsure how to interpret
the connection circuit diagram or if the latter is missing:
please contact us.
Installers are responsible for ensuring that the rules for
electrical compatibility in the country in which the products are
used are followed.
9.3 - Terminal block connection wiring
diagram
All motors are supplied with a wiring diagram in the terminal
box. If necessary this wiring diagram should be requested from
the supplier, stating the type and number of the motor shown
on the motor nameplate.
The connector links required for coupling can be found inside
the terminal box.
Single speed motors are fitted with an Ex safety block of 6
terminals, with the terminal markings complying with IEC
60034-8 (or NFC 51-118).
9.4 - Direction of rotation
When the motor is running in U1, V1, W1 or 1U, 1V, 1W from a
direct mains supply L1, L2, L3, it turns clockwise when seen
from the main drive shaft end.
If any two of the phases are changed over, the motor will run in
the reverse direction (make sure that the motor has been
designed to run in both directions).
If the motor is fitted with accessories (thermal protection or
space heater), these may be connected: either to strip terminals
of a certified type, or to non-certified terminal strips.
Motor equipped with a terminal block
9.5 - Earth terminal and earthing
The motor must be earthed in accordance with the
applicable regulations (protection of workers).
An earth terminal is located inside the terminal box and another
outside the on the cover. They are indicated by the symbol:
Jumper screws, lock washers, screws or lock-nuts or thread-
locking compound must be used to ensure that they do not
become loose.
Cable sizing must be in accordance with the requirements of
standard 60079-0.
Earth cable cross-sections as a function of motor supply cable
cross-sections:
Phase conductor
cross-section in mm
2
Min earth or protection conductor
cross-section mm
2
4
4
6
6
10
10
16
16
25
25
35
25
50
25
70
35
95
50
120
70
150
75
185
95
240
120
300
150
400
200
Sensor
INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec
