4
©2020 Regal Beloit Corporation, All Rights Reserved. MCIM20001E • Form# SB0098E
5.0 COOLING
There are various cooling formats for electric motors with
IC411 Totally Enclosed Fan Cooled (TEFC) as the most
common type that is used on our PPA motors. This type of
cooling is achieved by a fan mounted at the non drive end,
inside a fan cowl, which has an air inlet grille at the rear.
Air is drawn in through the grille and the fan distributes the
airflow along the fins of the motor body. The fan is designed
for either direction of rotation (unless otherwise indicated
on the fan cowl).
With TEFC motors it is important that the cooling fins remain
clear of debris to allow the airflow to be fully effective
in maintaining motor winding temperature within the
design limits.
It is equally important to ensure the installation provides
good unrestricted access to normal ambient air at the
fan entry point at all times and that inlet grill is clear of
contaminants. Refer to dimension BL below.
Motor frame
Dimensions BL [ mm ]
80 - 132
40
160 - 200
60
225 - 450
80
6.0 HAZARDOUS LOCATION MOTORS
CAUTION!
Standard PPA/PPC motors in the range of frame
sizes 80 to 400 with appropriate modifications are certified
for use in hazardous areas as below.
Increased safety motors
Exe, Zone 1, Group II
Temperature class T3
Marking code:
II 2 G Ex e IIC T3 Gb, IP66
(T
amb
-20°C to 40°C)
Non-sparking motors
Ex nA, Zone 2, Group II
Temperature class T3
Marking code:
II 3 G Ex nA IIC T3 Gc, IP66
(T
amb
-20°C to 50°C)
Dust Excluding
Ignition Proof
Ex t Zones 21 & 22
Temperature class T4
Marking code:
II 2 D Ex tb IIIC T135°C Db, IP66
(Tamb -20°C to 50°C)
OR
II 3 D Ex tc IIIC T135°C Dc, IP66
(T
amb
-20°C to 50°C)
Combination of Gas and Dust
Marking code:
II 2GD Ex e IIC T3 Gb, IP66
Ex tb IIIC T135°C Db
(T
amb
-20°C to 50°C)
OR
II 3GD Ex nA IIC T3 Gc, IP66
Ex tc IIIC T135°C Dc
(T
amb
-20°C to 50°C)
Address of manufacturer
AUSTRALIA
Regal Beloit Australia Pty Ltd
19 Corporate Avenue, Rowville VIC Australia 3178
T: +61 3 9237 4040
[email protected]
NEW ZEALAND
Regal Beloit New Zealand Limited
18 Jomac Place, Avondale, Auckland
T: +64 9 830 3550
[email protected]
SINGAPORE
Regal-Beloit Asia Pte. Ltd.
12 Tuas Loop Singapore, 637346 Singapore Malaysia
T: +65 6863 3473
[email protected]
Classification of zone, group and temperature category are
in accordance with the standards applied in the certificates.
A general explanation of these is available in the product
catalogue.
The hazardous location motor nameplates also carry
the certification number in addition to the marking
codes for the specific protection levels. Details of the
standards to which these are certified are available on
the actual certificates, copies of which can be accessed
from www.regalaustralia.com or obtained from Regal
Australia office.
CAUTION!
Only motors that carry nameplates indicating
Ex e or Ex nA or Ex t or combination of them can be used
in hazardous locations. Check nameplate before installing
motors in hazardous locations.
