Multilin 469 Motor Management Relay ... - GE Digital Energy

Note
469
BLOCK TRIP STOP START
3 x FLA
Transition
Level
FIGURE 5–1: Reduced Voltage Start Contactor Control Circuit
FLA
MOTOR
AMPS
(% FLA)
808725A1.CDR
FIGURE 5–2: Reduced Voltage Starting Current Characteristic
CHAPTER 5: SETTINGS
808724A2.CDR
If this feature is used, the Starter Status Switch input must be either from a common
control contact or a parallel combination of Auxiliary ‘a’ contacts or a series combination
of Auxiliary ‘b’ contacts from the reduced voltage contactor and the full voltage contactor.
Once transition is initiated, the 469 assumes the motor is still running for at least 2
seconds. This prevents the 469 from recognizing an additional start if motor current goes
to zero during an open transition.
5–22 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
469
3AUX
CC2 SEAL IN
CC1
CC1
SEAL IN
CC2
When the currrent falls below
the Transition Level and/or the
Timer expires, the Auxiliary
Relay activates for 1 second
Transition Time
REDUCED VOLTAGE
CONTACTOR
FULL VOLTAGE
CONTACTOR
signifies
Open Transition
TIME