GE Masoneilan 469 Series, Instruction Manual

Page: 47 / 348

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

UNDERVOLTAGE
settings page. Press the
ENTER
key to save, and then the
MESSAGE
 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”