Technical information

5 – PARAMETER DESCRIPTIONS
83
P67 Phase Order FUN 04
LCD Display
FUN:Phase Order
04 Insensitive
Range InS, AbC, CbA, SPH (Default InS)
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.
Options LED LCD
InS Insensitive Runs with any three phase sequence
AbC ABC Only runs with ABC phase sequence
CbA CBA Only runs with CBA phase sequence
SPH Single phase Single Phase
P68 CT Ratio FUN 03
LCD Display
FUN: CT Ratio
03 288
Range 72, 96, 144, 288, 864, 1320, 2640, 2880, 3900, 5760, 8000, 14.4K, 28.8K (Default 288)
Description The CT ratio 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 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.
NOTE: It is very important that the CT ratio and burden switches are set correctly. Otherwise,
many starter functions will not operate correctly.
See Also Table 1 – CT Ratios and Burden Switch Settings on page 10