Three-phase squirrel cage induction motors in flameproof enclosure type ASA and E2-ASA
frame size 63 – 355
3 or 6 bushings and optionally with one BT18 bushing for
additional protective devices for the frame sizes 80 – 355.
1 or 2 metric (or other standard thread) cable entries for the
frame sizes 63–132
2 metric (or other standard thread) cable entries for the frame
sizes 160 – 355
Optionally, the terminal boxes could be provided with an additional
cable entry having the size IPE/PG 16 or M20x1.5 for the frame size
63-355.
2.9
The motors type of protection is:
flameproof enclosure „d” for the frame size 63-355
flameproof enclosure „d” having an increased safety „e” as an
option for the terminal boxes in case of 80 – 355 framesize
motors
protection by enclosure „tb” for the frame size 63-355
2.10
The motors are designed for „IIC” gases group, according to EN
60079-0, being also suitable for applications that require group „II
A” and „IIB” motors.
They are intended for the use as EPL Gb equipment.
2.10.1
The motors designed „tb” are suitable for applications in Zone 21,
according to EN 61241-14, being also suitable for applications in Zone 22.
They are intended for the use as EPL Db equipment.
2.11
The temperature class T3, T4, T5 indicates the maximum surface
temperature of the enclosure and is confirmed by the EC-type-
Examination Certificate.
2.11.1
T100
0
C and T125
0
C indicates the maximum surface temperature of
the motors wich operate in explosive dust atmosphere and is confirmed
by the EC-type-Examination Certificate
3. Product
description
The flameproof enclosure consists of:
a.
cast iron or welded steel housing
b. cast
iron
shields
c.
cast iron terminal box
d.
cast iron terminal box cover
To provide the flameproof enclosure with necessary mechanical features,
only screws of the strength class minimum 8.8 shall be used as assembling
elements.
The motors are equipped with rolling-contact bearings.
