BENSHAW RediStart MX3 Series, User Manual

Page: 134 / 238

CT Ratio FUN 03
LCD Display
Range 72:1, 96:1, 144:1, 288:1, 864:1, 2640:1, 3900:1, 5760:1, 8000:1, 14400:1, 28800:1,
50:5, 150:5, 250:5, 800:5, 2000:5, 5000:5
(Default 288:1)
Description
The CT Ratio parameter must be set to match the CTs (current transformers) supplied with the starter. This
allows the starter to properly calculate the current supplied to the motor.
Only Benshaw supplied CTs can be used on the starter. The CTs are custom 0.2 amp secondary CTs
specifically designed for use on the MX
3
starter. The CT ratio is then normalized to a 1A secondary value.
The supplied CT ratio can be confirmed by reading the part number on the CT label. The part number is of
the form BICTxxx1M, where xxx is the CT primary and the 1 indicates the normalized 1 amp.
z
NOTE: It is very important that the CT ratio is set correctly. Otherwise, many starter functions will not
operate correctly.
Input Phase Sensitivity FUN 04
LCD Display
LCD Description
Range Insensitive Runs with any three phase sequence. (Default)
ABC Only runs with ABC phase sequence.
CBA Only runs with CBA phase sequence.
Single phase Single Phase.
Description
The Phase Order parameter sets the phase sensitivity of the starter. This can be used to protect the motor from
a possible change in the incoming phase sequence. If the incoming phase sequence does not match the set
phase rotation, the starter displays an alarm while stopped and faults if a start is attempted.
Rated RMS Voltage FUN 05
LCD Display
Range 100, 110, 120, 200, 208, 220, 230, 240, 350, 380, 400, 415, 440, 460, 480, 500, 525, 575, 600, 660, 690, 800,
1000, 1140, 2200, 2300, 2400, 3300, 4160, 4600, 4800, 6000, 6600, 6900, 10.00K, 11.00K, 11.50K, 12.00K,
12.47K, 13.20K, 13.80K
(Default 480)
Description The Rated Voltage parameter sets the line voltage that is used when the starter performs Over and Under line
voltage calculations. This value is the supply voltage, NOT the motor utilization voltage.
z
NOTE: Settings above 1140V are for medium voltage applications.
z
NOTE: The rated RMS voltage must be set properly in order for the starter to operate properly.
126
6 - PARAMETER DESCRIPTION
FUN: CT Ratio
03 288:1
FUN: Phase Order
04
Insensitive
FUN: Rated Volts
05
480 Vlt