Installation; Testing - GE 469 Instruction Manual

469
Motor Management Relay

Testing

1–28
The following sub-section will illustrate the procedures to set the 469 Motor
Management Relay to meet those requirements.
b) Description
Using the same system information, the following example illustrates the steps to
set the 469 for Undervoltage protection.
The following setpoints are provided:
Pickup: 70% of nominal voltage – starting
80% of nominal voltage – running
Time Delay: 13.0 s
c) Other Considerations
• The function will be active only if there is voltage in the line feeding the motor,
to avoid nuisance trips due to the lack of voltage. The 469 will consider the bus
energized only 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
ELEMENTS UNDERVOLTAGE
the MESSAGE key, after each setpoint is completed, to move to the next message:
U/V ACTIVE ONLY IF BUS ENERGIZED
: "Unlatched"
UNDERVOLTAGE ALARM
: "Alarm"
ASSIGN ALARM RELAYS
UNDERVOLTAGE ALARM PICKUP
STARTING U/V ALARM PICKUP
UNDERVOLTAGE ALARM DELAY
UNDERVOLTAGE ALARM EVENTS
: "Latched"
UNDERVOLTAGE TRIP
UNDRVOLTAGE TRIP MODE
: "Trip"
ASSIGN TRIP RELAYS
UNDERVOLTAGE TRIP PICKUP
STARTING U/V TRIP PICKUP
UNDERVOLTAGE TRIP DELAY

Installation

Extensive commissioning tests are available in Chapter 7. Tables for recording
required settings are available in Microsoft Excel format from the GE Multilin website
at http://www.GEmultilin.com/. The website also contains additional technical
papers and FAQs relevant to the 469 Motor Management Relay.
http://www.GEindustrial.com/multilin
setpoints page. Press the ENTER key to save, and then
: "Yes"
: "0.9 x RATED"
: "0.9 x RATED"
: "0.0 s"
: "Yes"
: "3-Phase"
: "0.8 x RATED"
: "0.7 x RATED"
: "13.0 s"
Installation
S9 VOLTAGE
GE Multilin