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Table 2-1. Open Loop Vector Startup Procedure - Continued
DESCRIPTION
Set the motor "no load cur-
rent" in the drive.
Motor no load current is set
as a percentage of motor
rated current. It is calculated
using the formula:
I
*100 = n110
noload
I
rated
Where:
I
= Motor no load current
noload
(measured in the
previous step)
I
= Motor rated current
rated
(from motor
nameplate)
Example:
2.5 * 100 = 60
4.2
This completes the startup.
Make further programming
changes as required.
(1)
The number in the display may be different than shown.
(2)
Motor synchronous speed can be calculated using the following formula:
120 x motor rated frequency
synch. speed =
number of motor poles
For 60 Hz Rated Motors
Poles
2
4
6
8
KEY SEQUENCE
DSPL
Press the
key four times.
V
Press the
key four times.
DATA
ENTER
Press the
key.
V
Use the
&
number in the display matches calculated no-
load current.
DATA
ENTER
Press the
key.
DSPL
Press the
key to get out of the pro-
gramming mode.
Synchronous Speed
3600 RPM
1800 RPM
1200 RPM
900 RPM
V
keys until the
2-5
DIGITAL OPERATOR
DISPLAY
PRGM
PRGM
PRGM
(1)
PRGM
FREF
(1)
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