GE Feeder Management Relay 750 User Manual

2-10 750/760 Feeder Management Relay GE Multilin
2.2 SPECIFICATIONS 2 INTRODUCTION
2
WAVEFORM CAPTURE
Data channels: 4 currents, 3 voltages, 14 logic input
states and 8 output relays
Sample rate: 16 per cycle
Trigger source: Element pickup/trip/dropout, control/
alarm event, logic input or manual com-
mand
Trigger position: 0 to 100%
Storage capacity: 2 to 16 events with 2048 to 256 samples
of data respectively
EVENT RECORDER
Number of events: 128
Content: event cause, 3 phase current phasors, 1
ground current phasor, sensitive ground
current phasors, 3 voltage phasors, sys-
tem frequency, synchronizing voltage,
synchronizing frequency, and analog
input level with a 1 ms time stamp.
LAST TRIP DATA
Records cause of most recent trip, 4 RMS currents, and 3 RMS
voltages with a 1 ms time stamp.
2.2.6 CONTROL ELEMENTS
SYNCHROCHECK
Voltage difference: 0.01 to 100.00 kV in steps of 0.01
Phase difference: 0 to 100° in steps of 2
Frequency difference: 0.00 to 5.00 Hz in steps of 0.02
Bypass permissives: DB & DL (dead bus and dead line)
LL & DB (live line and dead bus)
DL & LB (dead line and live bus)
DL | DB (dead line or dead bus)
DL
X DB (either dead line or dead bus)
SETPOINT GROUPS
Number of groups: 4
Accessibility: Can be changed from logic input or
through communications
Included features: TOC Curves, Phase TOC and IOC, Neu-
tral TOC and IOC, Ground TOC and
IOC, Negative Sequence OC and Volt-
age, Phase Directional, Ground Direc-
tional, Overvoltage, Undervoltage,
Underfrequency, Breaker Failure
UNDERVOLTAGE RESTORATION
Initiated by: Trip from Undervoltage 1, 2, 3 or 4
Minimum voltage level: 0.00 to 1.25
× VT in steps of 0.01
Time delay: 0.1 to 100.0 s in steps of 0.1
Incomplete seq. time: 1 to 10000 min. in steps of 1
Phases: Any one, any two, or all three (program-
mable) phases must operate for output
Level accuracy: per voltage input
Timing accuracy: ±100 ms
UNDERFREQUENCY RESTORATION
Initiated by: Trip from Underfrequency 1 or 2
Minimum voltage level: 0.00 to 1.25
× VT in steps of 0.01
Minimum freq. level: 20.00 to 60.00 Hz in steps of 0.01
Time delay: 0.1 to 100.0 s in steps of 0.1
Incomplete seq. time: 1 to 10000 min in steps of 1
Level accuracy: Per voltage and frequency input
Timing accuracy: ±100 ms
MANUAL CLOSE FEATURE BLOCKING
Operated by: manual close command.
Programmability: Block IOC for a selected period.
Raise TOC pickup for a selected period.
COLD LOAD PICKUP FEATURE BLOCKING
Operated by: logic input command or automatically
Programmability: Block IOC for a selected period.
Raise TOC pickup for a selected period.
TRANSFER SCHEME
Applicability: Used for double-bus system with two
normally-closed incoming and one nor-
mally-open bus tie circuit breaker.
Closing: Automatic closing of the bus tie breaker
after a loss of one source, with bus
decayed voltage permissive.
Trip: Trips a pre-selected breaker after the
third breaker is manually closed (pre-
vent-parallel operation).
AUTORECLOSE (760 ONLY)
Reclose attempts: Up to four (4) before lockout.
Blocking: Each reclose shot can block IOC and
raise TOC Pickup.
Adjustability: Current supervision can adjust the maxi-
mum number of shots to be attempted.
Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English