Three-phase squirrel cage induction motors in flameproof enclosure type ASA and E2-ASA
frame size 63 – 355
1.2.1
The environment may contain potential explosive mixtures made of air
and one of the substances pertaining to group C, temperature class T3, T4, T5,
according to EN 60079-0 or mixtures made of air and combustible dust
To avoid unpermissible surface temperatures, the possible dust layer upon the
machine surface must not exceed the maximum thickness of 5 mm.
On request, motors operating under tropical (up to +60
0
C) or
cold (till -55
0
C) climatic conditions are available. In the order
should be indicated the operation/storage temperature
1.3
The motors are not intended to operate under the following
conditions:
1.3.1
In mines where applications require ExdI motors
1.3.2
In places where abnormal vibrations or repeated mechanical shocks
at short time intervals are present (for example on vibrating
placements)
1.3.3
In areas containing nuclear radiation
1.3.4
In places exposed to thermal radiation coming from the surrounding
equipment
1.4
For the motors operating in areas where dust is present, care should
be taken to avoid the dust deposits with thickness higher than 5 mm
on the motor surface.
1.5
On demand, the manufacturer may build motors with other climatic
protections
2.
Requirements and operating parameters
2.1
The motors are manufactured for three-phase networks with
symmetrical phase voltages and currents and the technical
requirements regarding the supply voltage are according to EN
60034 -1
The motors are suitable for three-phase mains power supply with
400 V rated line voltage and for 50 Hz rated frequency
The overtemperature of the windings for the rated duty, at the rated
parameters is in accordance with EN 60034 -1
In case the motors are fed at the limit values of the supply voltage
according to EN 60034 -1 zone A, the increasing of the winding
overtemperature by 10 K is permitted
On request, the motors can be manufactured for three-phase mains power
supply having other rated voltages up to 500 V, for 63-90 framesize motors
or 690 V for 100-355 motors. On request, motors for frequency of 60 Hz
are also available.
