Non-sparking & Increased safety motors
Standard motors have the terminal box fitted on the top
and cable entry possibilities on both sides. A full de-
scription is contained in the product catalogues.
Unused cable entries must be closed with appropriate
(certified for EEx e) plugs and with same IP protection
as stamped on the rating plate.
Flameproof motors
There are two different types of protection for the
terminal box:
- EEx d for M2JA-motors
- EEx e for M2KA-motors
Unused cable entries must be closed with certified
plugs and the same IP protection as stamped on the
rating plate.
EEx d-motors / M2JA
In an EEx d motor, the connection to the terminal box is
standard, but care must be taken when selecting the
cable gland. This must be chosen according to two
criteria:
The cable gland must be of an approved design and
have at least the same protection as the motor. It should
be remembered that some cable glands are approved
for a maximum amount of free space in the terminal
box. The amount of free space for the range is listed
below for reference.
Motor type
Terminal box free space
80 - 132
1.45 - 1.7 dm
3
160 - 180
3 dm
3
200 - 250
8.5 dm
3
280 - 315
15 dm
3
355 - 400
70 dm
3
The type and dimensions of the cable gland must
conform to the type and section of the cable. The
degree of protection and diameter are specified in the
documents relating to the cable gland.
When closing the terminal box cover ensure that no
dust has settled on the surface gaps. Clean and grease
the surface to ensure easy dismantling in the future.
EEx de-motors / M2KA
In an EEx de motor, the terminal box connection is
defined by very precise norms.
The letter e or box EEx e is written on one part of the
box.
The cable gland must be of an approved design. The
type and dimensions of the cable gland must conform to
the type and section of the cable. The degree of protec-
tion and diameter are specified in the documents
relating to the cable gland.
Please ensure that assembly of the terminal connection
is carried out precisely in the order that is set out in the
assembly plan, which can be found inside the terminal
box.
The creepage distance and clearance must be conform
to EN 50019.
The seals of the terminal box must be placed correctly
in the slots provided, in order to ensure complete air
tightness. A leak could lead to penetration of dust or
water, creating a risk of flashover to live elements.
Dust Ignition Proof motors
Standard motors have the terminal box fitted on the top
with cable entry possible from both sides. A full descrip-
tion is contained in the product catalogues.
Unused cable entries must be closed with appropriate
plugs according to EN 50014. The IP degree of protec-
tion must be the same as for the terminal box.
Cable glands must have at least the same IP protection
as the motor.
When closing the terminal box cover ensure that no
dust has settled on the surface gaps and check that the
seal is in good shape
if not it has to be replaced with
one with the same material properties.
Warning
Do not open the motor nor the terminal box while
the motor is still warm and energised, when explo-
sive atmosphere is present.
Dismantling, re-assembly and rewinding
Follow the instructions given in standard IEC 79-19
regarding dismantling, re-assembly and rewinding.
Any operation must be undertaken by the manufacturer,
i.e. ABB Motors, or by an accredited company.
It must be remembered that no manufacturing alter-
ations are permitted on the parts that make up the
explosion-proof enclosure and the parts that ensure
dust-tight protection. Also ensure that the ventilation is
never, under no circumstances, obstructed.
Rewinding should always be carried out by qualified
EEx approved repair shops.
When re-assembling end shield or terminal box to the
frame, check that the spigots are clean of paint and dirt
with only a thin layer of grease.
Bearings
Special care should be taken with the bearings.
These must be removed using pullers and fitted by
heating or using special tools for the purpose.
Bearing replacement is described in detail in a separate
instruction leaflet available from ABB Motors.
Any indication placed on the motor, such as labels,
must be followed.
Note
Any repair by the end user, unless expressly
approved by the manufacturer, releases the
manufacturer from his responsibility to conformity.
