NORD Drivesystems B1091 - Manual (Page 17)

www.nord.com B1091-GB-4613 -17-
7. Motors for use in Zone 21 and Zone 22
according to EN 60079-0 and IEC 60079
Assignment of Cable Glands to Motor Size
Cable glands for standard motors Cable glands for brake motors
Type Number Thread Number Thread Number Thread Type Number Thread Number Thread Number Thread
63 2 M20x1.5 63 4 M20x1.5 2 M12x1.5
71 2 M20x1.5 71 4 M20x1.5 2 M12x1.5
80 2 M25x1.5 80 4 M25x1.5 2 M12x1.5
90 2 M25x1.5 90 4 M25x1.5 2 M12x1.5
100 2 M32x1.5 100 4 M32x1.5 2 M12x1.5
112 2 M32x1.5 112 4 M32x1.5 2 M12x1.5
132 2 M32x1.5 132 4 M32x1.5 2 M12x1.5 2 M16x1.5
160/
180/..X
2 M40x1.5 2 M12x1.5 2 M16x1.5
160/
180/..X
2 M40x1.5 2 M12x1.5 2 M16x1.5
180/
200/..X
2 M40x1.5 2 M12x1.5 2 M16x1.5
180/
200/..X
2 M40x1.5 2 M12x1.5 2 M16x1.5
200 2 M40x1.5 2 M12x1.5 2 M16x1.5 200 2 M40x1.5 2 M12x1.5 2 M16x1.5
If the motor is supplied with a certified cable gland, the clamping nuts of the cable gland must be tightened to
the torque specified in the following table.
Cable gland
Clamping nut
tightening torque [Nm]
Cabl
e gland
M20x1.5 6
M25x1.5 8
M32x1.5 12
M40x1.5 16
7.3.3 Permissible Ambient Temperature Range
The permissible ambient temperature range for all motors is -20°C...+40°C. A greater ambient temperature
range of -20°C...+60°C is permissible with motors for operation in Zones 21 and 22. However, this does not
apply for the option brake and external fan! The rated power must however be reduced to 72% of the
catalogue value.
If the maximum ambient temperature is between +40°C and +60°C, the power output should be inversely
linearly interpolated between 100% and 72%. In this case thermal protection of the motor by means of a
thermistor sensor is mandatory. The motor connection cables and the cable glands must be suitable for
temperatures of at least 80°C.
7.3.4 Painting
Motors for Zone 21 and Zone 22 are provided with suitable painting ex-works.
Subsequent painting may only be carried out after consultation with Getriebebau NORD or with a workshop
which is approved for the repair of explosion protected motors. Compliance with the valid standards and
regulations is mandatory.
7.3.5 IEC-B14 Motors
The B14 flanged bearing cover must be covered with a protective foil which must be removed before the
motor is fastened in place. Even if they are not required, All four fixing screws must be screwed into the
flanged bearing cover! The fixing screw threads must be inserted with a sealant, e.g. Loctite 242.
The maximum depth for screwing into the bearing cover is 2 x d.