NORD Drivesystems B1092 - Manual (Page 8)

-8- B1092-GB www.nord.com
5. Motors with increased ignition
protection, type "e" Ex e
5. Motors with increased ignition protection, type "e" Ex e 1MA
Identification: CE 0102 II G Ex e lI T3
Attention
Repairs must be carried out in or by authorised workshops. Repairs must be documented on
the motor (e.g. additional plate).
The increased hazard in areas endangered by explosions or fire damp requires particularly careful
observation of the general safety and start-up information.
Replacement parts - Only original replacement parts (see replacement parts list) may be used: this
particularly applies to seals and connection components. Exceptions are standard equivalent
commercially available components (e.g. roller bearings).
Explosion-protected electrical machines comply with standards:
EN 60034-1:2004 and all relevant parts, as well as EN 60079-0:2004, EN60079-7:2003.
They may only be used in explosion hazard areas according to the conditions stipulated by
the responsible supervisory authorities. They are responsible for the determination of the
explosion hazard (allocation of zones).
If the certification is supplemented with an "X" the special conditions in the EU prototype
certification must be observed.
The cable entries must be approved for explosion hazard areas and secured against
spontaneous loosening. Unused openings must be closed with approved stoppers. For the
assembly of the cable entries the instructions in the instruction manual of the cable entry
manufacturer must be observed. The number of threaded holes, the thread sizes and the type
of thread are given in Table 1. Special entries are indicated.
For vertical installation of the motor with the end of the shaft facing upwards or downwards,
e.g. types IMV3, IMV6, IMV19, for 1MA motors a cover must be arranged so that foreign
bodies cannot enter into the motor fan cover. Cooling of the motor must not be obstructed by
the cover. If nothing is stated to the contrary in the EU prototype certification or on the rating
plate with regard to type of operation and tolerances, electrical machines are designed for
continuous operation and normal infrequent starts, in which there is not significant start-up
warming.
The motors may only be used for the type of operation stated on the rating plate.
Range A in EN 60034-1:2004 - voltage ± 5%, frequency ± 2%, curve shape, symmetrical
mains - must be complied with in order that warming remains within the permissible limits.
Larger deviations from the rated values can cause a permissible warming of the electrical
machine and must be stated on the rating plate.
The temperature class of the motor stated on the rating plate must conform with the
temperature class of any escaping inflammable gases.
In addition, the safety device must be adjusted to the rated current. A triggering device
certified according to RL94/9/EU must be used.
Thermal protection of the machine by means of direct temperature monitoring of the windings
is permissible, if this is certified and stated on the rating plate.
An earthing tab is cast onto the housing for the connection of the external bonding cable. The
thread sizes for the screws of this external bonding cable are stated in Table 2.