Dust Ignition Proof Motors Dip, Ex Td; Connections For Different Starting Methods; Connections Of Auxiliaries; Terminals And Direction Of Rotation - ABB ACS800 Serie Manuel D'installation

Ex de-motors; M2KA/M3KP
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
EN 60079-7.
3.8.2 Dust Ignition Proof motors DIP,
Ex tD
Motors have as standard the terminal box fi tted on the
top with 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 seals are in good condition and well placed
because they can be damaged or moved during hand-
ling.
When closing the terminal box cover, ensure that no
dust has settled on the surface gaps and check that the
seal is in good condition – if not, it has to be replaced
with one with the same material properties.
WARNING
Do not open the motor or the terminal box while
the motor is still warm and energized when an
explosive atmosphere is present.
3.8.3 Connections for different
starting methods
The terminal box on standard single speed motors
normally contains six winding terminals and at least one
earth terminal. This enables the use of DOL- or Y/D –
starting. See Figure 1.
For two-speed and special motors, the supply connec-
tion must follow the instructions inside the terminal box
or in the motor manual.
The voltage and connection are stamped on the rating
plate.
Direct-on-line starting (DOL):
Y or D winding connections may be used.
For example, 690 VY, 400 VD indicates Y-connection
for 690 V and D-connection for 400 V.
Star/Delta starting (Y/D):
The supply voltage must be equal to the rated voltage
of the motor when using a D-connection.
Remove all connection links from the terminal block.
For increased safety motors, both direct-on-line and
star-delta starting of motors are allowed. In case of star-
delta starting, only Ex-approved equipment is allowed.
EN – 10
Other starting methods and severe starting condi-
tions:
In case other starting methods are used, such as a soft
starter, or if starting conditions are particularly diffi cult,
please consult ABB fi rst.

3.8.4 Connections of auxiliaries

If a motor is equipped with thermistors or other RTDs
(Pt100, thermal relays, etc.) and auxiliary devices, it is
recommended they be used and connected by appro-
priate means. For certain protection types, it is manda-
tory to use thermal protection. More detailed information
can be found in the documents delivered with the
motor. Connection diagrams for auxiliary elements and
connection parts can be found inside the terminal box.
Maximum measuring voltage for the thermistors is 2.5
V. Maximum measuring current for Pt100 is 5 mA.
Using a higher measuring voltage or current may cause
errors in readings.
3.9 Terminals and direction of
rotation
The shaft rotates clockwise when viewing the shaft face
at the motor drive end, and the line phase sequence -
L1, L2, L3 - is connected to the terminals as shown in
Figure 1.
To alter the direction of rotation, interchange any two
connections on the supply cables.
If the motor has a unidirectional fan, ensure that it
rotates in the same direction as the arrow marked on
the motor.
3.10 Protection against overload
and stalling
All hazardous area motors must be protected against
overloads, see IEC/EN 60079-14 and IEC 61241-14.
For increased safety motors (Ex e) the maximum
tripping time for protective devices must not be longer
than the time t shown on the motor rating plate.
E
ABB/Low Voltage Motors/ Ex manual 01-2007