3. Contactor 1M connects 1/2 of motor windings during starting cycle. The motor may not
reach full speed until the MOTOR ACCELERATION timer has timed out and both contactors 1M
and 2M are energized.
FTA1300-1350 WYE-DELTA CONTROLLERS
1
1. Follow all of the initial start-up instructions.
2. MOTOR ACCELERATION timer is factory set for 2 seconds and may be
fi
eld adjusted if necessary.
(See
Mark IIXG Programming
for details).
CAUTION: DO NOT EXCEED THIS TIMER SETTING WITHOUT CONSULTING YOUR FIRETROL REPRE-
SENTATIVE.
3. a. FTA1300 - Contactors 1M and 1S connect the motor in the WYE con
fi
guration. The motor may
not reach full speed until the MOTOR ACCELERATION timer has timed out, deenergizing 1S and
energizing 2M, connecting the motor in the DELTA con
fi
guration.
b. FTA1350 - Contactors 1M and 1S connect the motor in the WYE con
fi
guration. The motor
may not reach full speed until the MOTOR ACCELERATION timer has timed out, energizing 2S
and connecting the resistor bank, then energizing 2M and connecting the motor in the DELTA
con
fi
guration. 2S contacts deenergize contactor 1S.
CAUTION: A minimum run timer setting of less than 3 minutes can cause overheating of the resistors
in FTA1350 and FTA1500 controllers. The resultant overheating may damage the controller.
FTA1500 PRIMARY RESISTANCE CONTROLLERS
1
1. Follow all of the initial start-up instructions.
2. MOTOR ACCELERATION timer is factory set for 2 seconds and may be
fi
eld adjusted if necessary.
(See
Mark IIXG Programming
for details).
CAUTION: DO NOT EXCEED FOUR (4) SECONDS MAXIMUM.
3. Contactor 1S connects the motor in series with the resistor bank. The motor may not reach full
speed until the MOTOR ACCELERATION timer has timed out and contactor 1M is energized.
FTA1800, 2400 AUTOTRANSFORMER CONTROLLERS
1. Follow all of the initial start-up instructions.
2. MOTOR ACCELERATION timer is factory set for 2 seconds and may be
fi
eld adjusted if necessary.
(See
Mark IIXG Programming
for details).
CAUTION: DO NOT EXCEED THIS TIMER SETTING WITHOUT CONSULTING YOUR FIRETROL REPRE-
SENTATIVE.
3. Contactor 1S and 2S close and connect the motor to the autotransformer/primary reactor during
the starting cycle. The motor may not reach full speed until the MOTOR ACCELERATION timer
has timed out, deenergizing contactor 1S and energizing contactor 1M, connecting the motor
to full line voltage.
FTA1930 SOLID STATE STARTING CONTROLLERS
1. Follow the initial start-up instructions.
2. Motor will start at reduced voltage on soft start contactor 1MS.
3. When soft start contactor 1MS reaches full voltage, contactor 1M closes, bypassing 1MS.
1
CAUTION: Acceptance testing of each controller shall be for a minimum of six (6) automatic and
six (6) manual starts at a minimum run time of
fi
ve (5) minutes per NFPA 20 to insure resistor cooling
between starts. Motor manufacturer’s data must be consulted for maximum number of starts per
hour and other starting conditions.
8
