Delta MM300 Instruction Manual download pdf (Page 100)

CHAPTER 6: SETPOINTS CONFIGURATION SETPOINTS

MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL 6–13

CT Primary (Mandatory Setpoint)

Range: 5 to 1000 amps in steps of 1

Default: 5 amps

This setpoint specifies the phase CT primary current. It should never be less than the full

load current, and preferably no greater than twice than the full load current.

NOTE

NOTE:

This setpoint is displayed only if the phase CT is selected to 1 A secondary or 5 A

secondary.

High Speed CT Primary

Range: 5 to 1000 amps in steps of 1

Default: 5 amps

This setpoint specifies the phase CT primary current when the motor is running at high

speed. It should never be less than the high speed full load current, and preferably no

greater than twice than the high speed full load current.

NOTE

NOTE:

This setpoint is displayed only if the phase CT is selected as 1 A secondary or 5 A

secondary and the motor starter type is two-speed.

Ground CT Type

Range: None, Residual, CBCT 2000:1

Default: CBCT 2000:1

This setpoint specifies the type of ground CT. Select "Residual" if the fourth CT Input on

the IO_A is connected to the residual of the Phase CT. Select 2000:1 if a zero sequence CT

(CBCT) is connected to the ground input on the CPU card.

CT Primary Turns

Range: 1 to 10

Default: 1

For smaller motors where the drawn current is very low, the motor leads may be

wrapped through the CT Primary with several turns thereby increasing the current seen

by the MM300 and as a result increasing the accuracy of the measurement. The value

of this setting should equal the number of turns on the CT Primary to display the correct

current value. Internally the current measurement will be divided by this setting..

Three Phase Voltage Connection

Range: Wye, Delta

Default: Wye

The method in which the IO_B voltage inputs are connected must be entered here. Note

that phase reversal is disabled for single VT operation. All voltages are assumed

balanced.

Auxiliary Voltage Connection (Mandatory Setpoint)

Range: VabVT, VbcVT, VcaVT, VanVT, VbnVT, VcnVT, VanDirect, VbnDirect, VcnDirect

Default: Vab VT

This setpoint specifies the control transformer connection to the motor supply voltage.

Auxiliary VT Primary

Range: 110 to 690 volts in steps of 1

Default: 415 volts

This setpoint specifies the primary voltage rating of the control transformer.

Auxiliary VT Secondary

Range: 110 to 300 volts in steps of 1

Default: 110 volts

This setpoint specifies the secondary voltage rating of the control transformer.

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Delta MM300 Instruction Manual Page 100

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