GE Multilin 469, Instruction Manual

Page: 45 / 338

CHAPTER 1: GETTING STARTED
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 1–37
if the measured voltage is greater than 20% of nominal voltage. A trip condition will be
initiated only if undervoltage is detected in all the phases.
• In order to monitor for VT Fuse Failure or to monitor for undervoltage in one phase
only, set an Alarm when the voltage is 90% of nominal voltage both during start and
running.
For the Undervoltage element, enter the following values in the
S9 VOLTAGE ELEMENTS
ZV
UNDERVOLTAGE
settings page. Press the
ENTER
key to save, and then the
MESSAGE
T
key, after each settings is completed, to move to the next message:
U/V ACTIVE ONLY IF BUS ENERGIZED
: “Yes”
UNDERVOLTAGE ALARM
: “Unlatched”
ASSIGN ALARM RELAYS
: “Alarm”
UNDERVOLTAGE ALARM PICKUP
: “0.9 x RATED”
STARTING U/V ALARM PICKUP
: “0.9 x RATED”
UNDERVOLTAGE ALARM DELAY
: “0.0 s”
UNDERVOLTAGE ALARM EVENTS
: “Yes”
UNDERVOLTAGE TRIP
: “Latched”
UNDRVOLTAGE TRIP MODE
: “3-Phase”
ASSIGN TRIP RELAYS
: “Trip”
UNDERVOLTAGE TRIP PICKUP
: “0.8 x RATED”
STARTING U/V TRIP PICKUP
: “0.7 x RATED”
UNDERVOLTAGE TRIP DELAY
: “13.0 s”