GE 469

1–34 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 1: GETTING STARTED
For the Short Circuit element, enter the following values in the S6 CURRENT ELEMENTS Z
SHORT CIRCUIT TRIP
page. Press the MESSAGE T key after each settings is entered to
move to the next message.
SHORT CIRCUIT TRIP: “Latched”
SHORT CIRCUIT TRIP OVEREACH FILETER: “Off” - no filtering of DC component is
required (refer to Short Circuit Trip on page 5–59 for additional information)
ASSIGN TRIP RELAYS: “Trip”
SHORT CIRCUIT TRIP PICKUP: “11.7”
INTENTIONAL S/C TRIP DELAY: “0 ms” - Instantaneous trip is required.
SHORT CIRCUIT TRIP BACKUP: “On” - if the main disconnect device does not respond to
the trip command, a second signal will be initiated via an auxiliary relay to generate a
bus shot down; in most cases, the second trip command energizes a lock out relay (86)
which is used to trip the upstream breakers
ASSIGN BACKUP RELAYS: “Auxiliary3”
SHORT CIRCUIT TRIP BACKUP DELAY: “200 ms” - this time must be greater than the
total time required to trip the main breaker plus a margin
Since the specifications do not indicate values for the following features, they must be left
“Off”:
OVERLOAD ALARM: “Off”
MECHANICAL JAM: “Off”
UNDERCURRENT: “Off”
PHASE DIFFERENTIAL: “Off”
For the Ground Fault element, enter the following values in the
S6 CURRENT ELEMENTS ZV
GROUND FAULT page. Press the MESSAGE T key after each settings is entered to move to
the next message.
GROUND FAULT OVERREACH FILETER: “Off” – no filtering of DC component is required
(refer to Ground Fault on page 5–63 for additional information)
GROUND FAULT ALARM: “Off” – default setting, no Alarm is required
ASSIGN ALARM RELAYS: “Alarm” – default setting
GROUND FAULT ALARM PICKUP: “0.10 x CT” – default setting
INTENTIONAL GF ALARM DELAY: “0 ms” – default setting
GROUND FAULT ALARM EVENTS: “Off” – default setting
GROUND FAULT TRIP: “Latched” – the output relay will remind energized until the Reset
command executed
ASSIGN TRIP RELAYS: “Trip”
GROUND FAULT TRIP PICKUP: “0.20 x CT”
INTENTIONAL GF TRIP DELAY: “0 ms”
GROUND FAULT TRIP BACKUP: “On”
ASSIGN BACKUP RELAYS: “Auxiliary3” - same relay assigned for the Short Circuit Trip
Backup
GROUND FAULT TRIP BACKUP DELAY: “200 ms” - same time delay assigned to the Short
Circuit Trip Backup
For the Current Unbalance element, enter the following values in the
S6 CURRENT
ELEMENTS
ZV CURRENT UNBALANCE page. Press the MESSAGE T key after each settings
is entered to move to the next message.