Instruction Manual

5–22 Programming Parameters
Publication 1397-5.0 — June, 2001
SETUP
[CT Turns Ratio] — P.036
The drive current transformer turns ratio
(Tp/Tn).
See Regulator board replacement
instructions for information on determining the
CT TURNS RATIO. This parameter is not
restored if a Restore Defaults is done.
Display/Drive Units: Tp/Tn
Parameter Type: Configurable
Group: Setup
Factory Default: Value varies per HP rating (See table below)
Minimum Value: 1
Maximum Value: 32767
ATTENTION: The [CT Turns Ratio] parameter is also used in the
calculation of the burden resistor value. Do not adjust/change the value
of this parameter from its factory set value unless you are replacing the
regulator board (see chart below). Failure to observe this precaution
could result in damage to, or destruction of, the equipment.
!
The Drive Current Transformer Turns Ratio
(Tp/Tn):
Value to Enter
1.5 HP at 230 V AC/3 HP at 460 V AC 139
2-7.5 HP at 230 V AC/5-15 HP at 460 V AC 208
10-15 HP at 230 V AC/20-30 HP at 460 V AC 417
20-30 HP at 230 V AC/40-60 HP at 460 V AC 833
40-75 HP at 230 V AC/75-150 HP at 460 V AC 2000
100-150 HP at 230 V AC/200-300 HP at 460
VAC
5230
400–600 HP at 460VAC 7770
7 Amps at 380/415 VAC 139
29 Amps at 380/415 VAC 208
55 Amps at 380/415 VAC 417
110 Amps at 380/415 VAC 833
265 Amps at 380/415 VAC 2000
[Accel Time] — P.037
Amount of time it will take the drive to reach
[Max Motor Speed] from 0 speed. Smaller
changes in speed will take proportionately
less time.
In proportional trim mode, the actual time to
accelerate will be modified by [Draw Percent
Out].
Refer to the Speed Reference Ramp, Fig.
A.4 block diagram, for additional information.
Display/Drive Units: SECONDS
Group: Setup
Type: Tunable
Factory Default: 5.0
Minimum Value: 0.1
Maximum Value: 300.0