GE Multilin 850

1–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
FAULT REPORTS
Number of Reports: ........................................... 15
Fault Location Method:....................................Single-ended
Voltage Source:....................................................Wye-connected VTs, Delta-connected VTs and neutral
voltage, delta-connected VTs and zero-sequence current
(approximation)
Maximum Method Accuracy:........................Fault resistance is zero or fault currents from all line
terminals are in-phase
Relay Accuracy: .................................................. ± 1.5% (V > 10 V, I > 0.1 pu)
Other Accuracy Factors:.................................VT%error + user data
CT%error + user data
ZLine%error + user data
Captured Data: ....................................................Pre-fault and fault phasors for all CT and VT banks, pre-fault
and fault trigger operands, user-programmable analog
channels 1 to 32
FAULT LOCATOR
Method: ................................................................... Single-ended
Voltage Source:....................................................Wye-connected VTs, Delta-connected VTs and neutral
voltage, delta-connected VTs and zero-sequence current
(approximation)
Maximum Accuracy, (only if) : ......................fault resistance is zero or fault currents from all line
terminals are in-phase
Relay Accuracy: .................................................. ± 1.5% (V > 10 V, I > 0.1 pu)
Worst-case Accuracy:......................................VT%error + user data
ZLine%error + user data
RELAY ACCURACY%error + (1.5%)
DEMAND
Measured Values: ...............................................Phase A/B/C present and maximum current
Measurement Type:...........................................Thermal Exponential, 90% response time (programmed): 5,
10, 15, 20, 30 minutes
Block Interval / Rolling Demand, time interval (programmed):
5, 10, 15, 20, 30 minutes
Current Pickup Level: ........................................ 10 to 10000 in steps of 1 A
Dropout Level:......................................................96-98% of Pickup level
Level Accuracy: ...................................................± 2%
TAP CHANGER FAILURE
Operating Parameter: ...................................... Tap Changer Position
Time Delay: ...........................................................0.00 to 600.00 s
Timer Accuracy:..................................................±3% of delay setting or ±2 cycles (whichever is greater) from
pickup to operate
HARMONIC DETECTION
Operating Parameter: ...................................... Current 2
nd
, 3
rd
, 4
th
, 5
th
harmonic or THD per phase
Timer Accuracy:..................................................Harmonics: ±3% of delay setting or ±1/4 cycle (whichever is
greater) from pickup to operate
THD: ±3% of delay setting or ±3 cycles (whichever is greater)
from pickup to operate
Recording
TRANSIENT RECORDER
Default AC Channels:........................................ currents + 4 voltages
Configurable Channels:...................................16 analog and 64 digital channels
Sampling Rate:.....................................................128/c, 64/c, 32/c, 16/c, 8/c
Trigger Source:.....................................................Any element pickup, dropout or operate, digital input or
output change of state, FlexLogic operand
Trigger Position:...................................................0 to 100%
Storage Capability:............................................ Non-volatile memory