NORD Drivesystems B1092 - Manual (Page 46)

-46- B1092-GB www.nord.com
7. Data Sheets
Translated extract from Data Sheet 02
of the EU Prototype Test Certificate PTB 07 ATEX 3053 X
for the three-phase motor, type 1MA7 166-4…
The continuous current limit of the frequency inverter must be set dependent on the frequency according
to the following diagram:
0,7
0,75
0,8
0,85
0,9
0,95
1
1,05
1,1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105
f / Hz
I / In
Star connection
Delta connection
Permissible region
Prohibited region
Setting parameters for the continuous current limit of
the frequency inverter between 5 Hz and 100 Hz
All other setting data should be selected according to the requirements of the drive unit.
Special conditions
Group operation of the motors is not permissible.
Motors of this type may only be operated with inverters which fulfil the requirements stated above under
"Inverter setting data".
The maximum rated current of the frequency inverter may correspond to double the rated current of the
motor.
The current monitoring of the frequency inverter must record the effective value of the machine current
with a tolerance of
±
5 % in relation to the rated current of the motor.
Before start-up it must be ensured that no overvoltages due to the inverter with a peak value in excess of
1556 V (2* 2 *550V) occur at the terminals of the electrical machine.
Test report PTB Ex 07-37125
Certification Facility for Explosion Protection
Braunschweig, 4 October 2007
pp
L.S.
Dr.-Ing. F. Lienesch
Senior Government Official Sheet 3/3