GE MOTOR MANAGER 2 - Ct Vt Inputs

GE Power Management
MM2 Motor Manager 2 4-5
4 SETPOINTS 4.2 S1 CONFIGURATION
4
4.2.5 CT / VT INPUTS
PATH: SETPOINTS
t
S1: CONFIGURATION
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CT/VT INPUTS
CONTACTOR SEQUENCE:
1S-2S
Range: 1S-2S, 2S-1S
Appears only if STARTER TYPE is AUTOTRANS OPN TRANS. The 1S-2S value
closes the 1S contactor ahead of the 2S contactor as per some manu-
facturer wiring practices. The 2S-1S value means that the 2S contactor
will close ahead of the 1S contactor, another common wiring practice.
CHANGE OVER TIME:
5 s
Range: 1 to 125 seconds; Step: 1 second
Appears only if STARTER TYPE is AUTOTRANS OPN TRANS or AUTOTRANS CLS
TRANS. This is the time delay from the closure of Contactor A until the
opening of Contactor A.
STARTS PER HOUR:
5
Range: 1 to 40 starts/hour or OFF; Step: 1
Limits the number of starts per hour to prevent over heating of windings.
PHASE CT PRIMARY
AMPS: 100
Range: 5 to 1000 A; Step: 5 A
Enter the phase CT rated primary amps; e.g. if the phase CTs are rated
500:5, enter 500. The CT secondary must be connected to the correct
input, i.e. 1 A or 5 A.
HIGH SPEED PHASE CT
PRIMARY AMPS: 100
Range: 5 to 1000 A; Step: 5 A
Appears only if STARTER TYPE is TWO SPEED. Enter the high speed CT
rated primary amps. In effect only when Contactor B is energized.
GROUND FAULT CT
INPUT:50:0.025 CBCT
Range: 50:0.025 CBCT, 5 A SEC CBCT, 5 A RESIDUAL
Enter the ground sensing used, either sensitive 50:0.025 core balanced
ground fault CT, 5 A sec. core balanced CT, or 5 A Residual for residual
ground fault current sensing from the 5 A phase CT secondaries.
GROUND CT PRIMARY
AMPS: 100
Range: 5 to 1000 A; Step: 5 A
Appears only if 5A SEC CBCT is selected for the GROUND FAULT CT INPUT.
Enter the GFCT rated primary amps.
50:0.025 HI-RES
DISPLAY: DISABLE
Range: Enable, Disable
Increases the displayed resolution to 2 decimal points for the 50:0.025
ground input.
VT PRIMARY VOLTAGE:
OFF V
Range: 110 to 600 V or OFF; Step: 1 V
Enables/disables the voltage/power features and sets VT primary volts.
VT CONNECTION TYPE:
PHASE (A-N)
Range: PHASE (A-N), LINE (A-B)
Appears only if the VT PRIMARY VOLTAGE setpoint is not set to OFF. Enter
the type of VT connection: PHASE A-N (V
an
) or LINE A-B (V
ab
).
VT SECONDARY
VOLTAGE: 120V
Range: 110 V, 120 V
Appears only if the VT PRIMARY VOLTAGE setpoint is not set to OFF.
NOMINAL FREQUENCY:
60 Hz
Range: 50 Hz, 60 Hz