S4 Control; Description; Undervoltage Autorestart - GE MOTOR MANAGER 2 Instruction Manual

4.5 S4 CONTROL

4.5 S4 CONTROL
This page is used to configure all control features in the MM2. Setpoints Page 4 is divided into three
sections, UNDERVOLTAGE AUTO-RESTART, AUX RELAY 1 CONFIG and AUX RELAY 2 CONFIG.
PATH: SETPOINTS MMMM S4: CONTROL M UNDERVOLTAGE AUTO RESTART
UNDERVOLTAGE
RESTART: ENABLE
4
IMMED. RESTART POWER
LOSS TIME: 200 ms
DELAY RESTART POWER
LOSS TIME: 2.0 s
RESTART TIME DELAY
2.0 s
4-28
Range: ENABLE, DISABLE
It is possible to restart the motor after a momentary power loss if this
feature is enabled. When the control voltage (derived from the incoming
motor supply) drops below the dropout voltage, both contactors are de-
energized. Voltage thresholds for the two internally set control voltage
levels are 80 V for 120 V setting and 150 V for 240 V setting. At nomi-
nal voltage, the MM2 rides through a power outage less than 135 ms
(varies according to the number of output relays energized at the time
of power failure). Critical data is saved to E
outage that exceeds the MM2 ride-through initializes a backup timer
that continues to run without power for approximately 1 hour. Once con-
trol power is restored, the MM2 can take up to 300 ms to initialize; this
time includes the initializing of the microprocessor, variables in the
code, the determination that a restart is required, and the closure of the
internal output relay. The reaction time of the contactor will be in addi-
tion to the 300 ms power-up time. If control voltage is restored within
the IMMED. RESTART POWER LOSS TIME (0.1 to 0.5 sec.), the motor will be
restarted immediately. If the supply is restored after the IMMED. RESTART
POWER LOSS TIME but before the DELAY RESTART POWER LOSS TIME, the
motor will be restarted after the RESTART TIME DELAY. If a delayed restart
is always required, set the DELAY RESTART POWER LOSS TIME to UNLIM-
ITED. Select DISABLE if this feature is not required.
Range: 100 to 500 ms or OFF; Step: 20 ms
This is the time measured by the MM2 backup processor; it is not the
time the AC power has been off. See UNDERVOLTAGE RESTART for
details.
Range: 0.1 to 10 seconds or TIME UNLIMITED; Step: 0.1 sec.
This is the time measured by the MM2 backup processor; it is not the
time the AC power has been off. See UNDERVOLTAGE RESTART for
details.
Range: 0.2 to 1200.0 seconds; Step: 0.2 seconds
See UNDERVOLTAGE RESTART for details.
MM2 Motor Manager 2

4.5.1 DESCRIPTION

4.5.2 UNDERVOLTAGE AUTORESTART

2
PROM at this time. A power
GE Power Management
4 SETPOINTS