Flameproof Motors; Dust Ignition Protection Motors Ex T - ABB M3JP Manuel D'installation

Unused cable entries must be closed with blanking
elements according to the protection and IP class of the
terminal box.
The degree of protection and diameter are specified in the
documents relating to the cable gland.
WARNING
Use appropriate cable glands and seals in the cable
entries according to the protection type and the type
and diameter of the cable.
Earthing must be carried out according to local regulations
before the machine is connected to the supply voltage.
The earth terminal on the frame has to be connected to
PE (protective earth) with a cable as shown in Table 5 of
IEC/EN 60034-1:
Minimum cross-sectional area for protective conductors
Cross-sectional area of phase
conductors of the installation,
S, mm
2
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
In addition, earthing or bonding connection facilities on the
outside of an electrical apparatus must provide an effective
connection of a conductor with a cross-sectional area of
at least 4 mm .
2
The cable connection between the network and motor
terminals must meet the requirements stated in the
national standards for installation or in the standard IEC/
EN 60204-1 according to the rated current indicated on
the rating plate.
NOTE!
When the ambient temperature exceeds +50 °C,
cables having a permissible operating temperature
of +90 °C as minimum shall be used. Also all other
conversion factors depending on the installation
conditions shall be taken into account while sizing
the cables.
Ensure that the motor protection corresponds to the
environment and weather conditions.
The seals of terminal boxes (other than Ex d) must be
placed correctly in the slots provided, to ensure the
correct IP class. A leak could lead to penetration of dust or
water, creating a risk of flashover to live elements. If seals
or gaskets are replaced, original sealing solution materials
must be used.
10 – ML/EN ABB Motors and Generators | 3GZF500730-47 rev F 08-2016
Minimum cross-sectional area of the
corresponding protective conductor,
S , mm
2
P
4
6
10
16
25
25
25
35
50
70
70
95
120
150
185

4.9.1 Flameproof motors

There are two different types of protection for the terminal
box:
− Ex d for M3JP-motors and M3JM
− Ex de for M3KP-motors and M3KM
Ex d-motors; M3JP
Certain cable glands are approved for a maximum amount
of free space in the terminal box. The amount of free
space for the motor range and the number and type of
gland threads are listed below.
Motor type Pole Terminal
M3JP / number box
M3JM type
80 – 90 2 – 8 25
100 – 132 2 – 8 25
160 – 180 2 – 8 63
200 – 250 2 – 8 160
280 2 – 8 210
315 2 – 8 370
355 2 – 8 750
400 – 450 2 – 8 750
Auxiliary cable entries
Motor type Pole number
80 – 132 2 – 8
160 – 450 2 – 8
When closing the terminal box cover ensure that no dust
has settled on the surface gaps. Clean and grease the sur-
face with non-hardening contacting grease.
WARNING
Do not open the motor or the terminal box while the
motor is still warm and energized when an explosive
atmosphere is present.
Ex de-motors; M3KP and M3KM
The letter 'e' or 'box Ex e' is shown on the terminal box
cover.
Ensure that assembly of the terminal connection is carried
out precisely in the order described in the connection
instructions, which are found inside the terminal box.
The creepage distance and clearance must conform to
IEC/ EN 60079-7.

4.9.2 Dust ignition protection motors Ex t

As standard, motors have the terminal box fitted on the
top with a cable entry possible from both sides. A full
description is contained in the product catalogs.
Pay special attention to the sealing of the terminal box and
cables to prevent the access of combustible dust into the
terminal box. It is important to check that the external
sealing is in good condition and well placed because they
can be damaged or moved during handling.
Threaded Terminal Cover Tightening
holes box bolt torque of
free size terminal
volume box bolts
1xM25 1.0 dm M8 23 Nm
3
2xM32 1.0 dm M8 23 Nm
3
2xM40 4.0 dm M10 46 Nm
3
2xM50 10.5 dm M10 46 Nm
3
2xM63 24 dm M8 23 Nm
3
2xM75 24 dm 3 M8 23 Nm
2xM75 79 dm M12 80 Nm
3
2xM75 79 dm M12 80 Nm
3
Threaded holes
1xM20
2xM20