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CHAPTER 5: SETPOINTS
5.3.4
Load
Protection
] LOAD PROTECTION
]
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
•
THERMAL CAPACITY ALARM: When the thermal capacity used exceeds the level set,
an alarm will be generated. This alarm can be assigned to a dedicated auxiliary relay.
•
OPEN CONTROL CIRCUIT TRIP: In two-wire control applications where a constant
start signal is provided, the MM3 Motor Manager 3 should be configured to trip on an
open control circuit. An open control circuit occurs when feedback on contactor
status (terminal 55) stays open when a start operation is executed. This condition may
occur if a control wiring problem develops or because of an auxiliary contact failure.
The
OPEN CONTROL CIRCUIT TRIP
RESET ALARMS USING RESET KEY
•
RESET ALARMS USING RESET KEY: The MM3 Motor Manager 3 will now allow the
acceleration alarm, open control circuit alarm, motor greasing, contactor inspection
and motor stopped time alarms to be reset using the faceplate RESET key. All other
alarms will reset when the alarm condition clears.
PATH: S2 PROTECTION
setpoint should be used in conjunction with the
function.
LOAD PROTECTION
UNDERPOWER ALARM
LEVEL:
OFF kW
UNDERPOWER ALARM
DELAY: 10 s
UNDERPOWER TRIP
LEVEL:
OFF kW
UNDERPOWER TRIP
DELAY: 10 s
ACCELERATION TIME
ALARM: OFF s
ACCELERATION TIME
TRIP:
OFF s
LOAD INCREASE ALARM:
OFF %FLC
UNDERCURRENT ALARM
LEVEL: OFF %FLC
UNDERCURRENT ALARM
DELAY:
10 s
UNDERCURRENT TRIP:
LEVEL: OFF %FLC
UNDERCURRENT TRIP
DELAY:
10 s
STALLED ROTOR TRIP
LEVEL: OFF
STALLED ROTOR TRIP
DELAY:
3.0 s
S2 PROTECTION
Range:
0.2 to 1100.0 kW or OFF in
steps of 0.1
Range:
1 to 60 s in steps of 1
Range:
0.2 to 1100.0 kW or OFF in
steps of 0.1
Range:
1 to 60 s in steps of 1
Range:
0.5 to 125.0 s or OFF in steps of
0.5
Range:
0.5 to 125.0 s or OFF in steps of
0.5
Range:
10 to 130% FLC or OFF in steps
of 1
Range:
10 to 100% FLC or OFF in steps
of 1
Range:
1 to 60 s in steps of 1
Range:
10 to 100% FLC or OFF in steps
of 1
Range:
1 to 60 s in steps of 1
Range:
1.15 to 4.50 × FLC or OFF in
steps of 0.05
Range:
0.5 to 5.0 s in steps of 0.5
5–19
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