21
MOTORS FOR VARIABLE SPEED DRIVE
This series of motors 5/7 is designed and tested in accordance with IEC 60034-1 and can work over
the static frequency converter under conditions in accordance with IEC 60034-25 in regulation range
from 5 to 87 Hz for motor polarity 2p=2 and for other polarities in regulation range from 5 to 100 Hz.
Motors suited for supply over static frequency converter have in their winding built-in thermal
protection. The static frequency converter itself is situated outside of dangerous zone.
On additional name plate are characteristics of motors for different frequency.
Basic name plate Ex motors for
varialle speed drive motors
For using motors in different drive conditions then on name plate (loads or voltage or frequencies) it is
neccesery to contact manufacturer.
Designation of motors with Ex-protection
Every motor with Ex-protection, along with the basic nameplate according to paragraph 2. of these
instructions, has on it’s housing additional plate with information about the type of anti-explosive
protection.Motors with Ex-protection “explosion proof – d/db”, “increased safety – e/eb” nameplate
Nameplate
for
EX
motors
with
CESI
certificate
The following data is stated on the nameplate:
Code: Motor number used for identification during the production process, and as a
reference for ordering spare parts for the motor in the maintenance process.
N
0
:
Factory motor number
Type:
Type designation of the motor
Protection:
Type of anti-explosion protection
Nameplates are generally held in place by rivets on the main motor housing, and where that is not
possible, they are placed on the fan cover or in case of single phase motors on the plastic box, or
where readability of stated information is assured.
When ordering spare parts, most important information is Code of the motor, and of course the
information about the needed spare part that needs to be replaced during repair or regular
maintenance.
Along with these instructions, exploded assembly drawing with ordering information is supplied.
