18
Should the insulation resistance values be lower than the above, check if the
terminals are affected by humidity or dust and clean them as necessary.
In the event of this not being the case the motors will need to be oven dried at a
temperature less than 100 º C degrees.
5.2
Ensure that the motor nameplate voltage is the same as the mains supply. The
connection diagrams supplied inside the motor terminal box shall be always
respected in function of available supply voltage and/or required speeds (2
speed motors).
For information, the most common connection diagrams are indicated on pages
35/36.
5.3
All motors are supplied clockwise rotation, viewed from shaft end, when the
alphabetical sequence of the terminal letters (U,V,W), corresponds with the
time sequence or the phases (L1,L2,L3). To change the rotation of direction of
the motor it is necessary to exchange 2 of the 3 supply cables.
Motors having unidirectional fan, have assembled an arrow label to indicate the
direction of rotation of the motor.
5.4
If motors are fitted with
Ex e
terminal boxes with bushing insulators, shunts
must be assembled or disassembled as indicated in the instructions given in
this manual, in order to avoid that position of connecting clamps is modified
(see page 37).
5.5
Close to each threaded hole in enclosures foreseen for conduit entries it has a
plate with it dimensions and thread type.
5.6
Cables and cable-glands used must be compatible with the temperature
indicated in the certificate plate whenever it’s higher than 80ºC:
- 100ºC for ambient temperature 60ºC
- 90ºC for ambient temperature 50ºC
5.7
Cable glands must be
ATEX certified for motores ATEX and IECEx in case
of motors with certification IECEx
and must have the same protection (Ex d
IIB, Ex d IIC, Ex e II, Ex d I or Ex e I) of the terminal boxes.
5.8
Before closing terminal boxes make sure that they are completely free from
dust inside.
5.9
Before the motor start-up, the supply connection shall be checked if they have
been made according to the diagrams of this manual or supplied inside terminal
box, taking in consideration the type of motor and winding.
WINDING
TEMPERATURE
DE
ENROLAMENTO
VOLTAGE SERVICE
< 1,1KV > 1,1KV
20º C
30º C
40º C
20
MΩ
400
MΩ
10
MΩ
200
MΩ
5
MΩ
100
MΩ
