GE MM3, Instruction Manual, Page: 87 / 230

CHAPTER 5: SETPOINTS S1 CONFIGURATION
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL 5–7
when contactor B drops out. With a reversing starter, this delay occurs when
switching from forward (contactor A) to reverse (contactor B) and from reverse to
forward.
• HIGH SPEED START BLOCK : This setting appears only if
STARTER TYPE
is selected as
“TWO SPEED”. When disabled, the MM3 Motor Manager 3 allows the motor to be
started directly to high speed. When enabled, the motor must be started in low speed
before switching to high speed.
• RAMP UP TIME / RAMP DOWN TIME : These settings appear only if STARTER TYPE is
selected as “INVERTER”. See Inverter Starter on page 2–20 for details on functionality.
• STAGE ONE SHORTING TIME : This setting appears only if
STARTER TYPE
is selected as
“SLIP RING” or “PART WINDING”. This is the time delay from the closure of contactor A
until the closure of contactor B.
• CONTACTOR SEQUENCE : This setting appears only if
STARTER TYPE
is selected as
“AUTOTRANS OPN TRANS” or “AUTOTRANS CLS TRANS”. The 1S-2S value indicates that
the 1S contactor will close ahead of the 2S contactor as per some manufacturer
wiring practices. The 2S-1S value indicates that the 2S contactor will close ahead of
the 1S contactor, another common wiring practice.
• CHANGE OVER TIME : This setting appears only if
STARTER TYPE is
selected as
“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 : This setting limits the number of starts per hour to prevent over
heating of windings.
5.2.4 CT/VT Inputs
PATH: S1 CONFIGURATION ÖØ CT/VT INPUTS
] CT/VT INPUTS
] PHASE CT PRIMARY
AMPS:
NONE
Range: None to 1000 A in steps of 1
PRIMARY WIRE TURNS:
1 Range: 1 to 10 in steps of 1
HIGH SPEED PHASE CT
PRIMARY AMPS:
NONE
Range: None to 1000 A in steps of 1
GROUND FAULT CT
INPUTS:50:0.025 CBCT Range: 50:0.025 CBCT, RESIDUAL
VT PRIMARY VOLTAGE:
OFF V Range: 110 to 690 V or Off in steps of 1
VT CONNECTION TYPE:
PHASE (A-N) Range: Phase (A-N), Line (A-B)
VT SECONDARY
VOLTAGE: 120V
Range: 110 to 240 V in steps of 10
NOMINAL FREQUENCY:
60 Hz Range: 50 Hz, 60 Hz
REVERSE CT POLARITY:
DISABLE Range: Enable, Disable