CHAPTER 1: INTRODUCTION
SPECIFICATIONS
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
1–15
EVENT RECORDER
Number of events:..............................................256
Header: ....................................................................relay name, order code, firmware revision
Content:...................................................................event number, date of event, cause of event,per-phase
current, ground current, sensitive ground current, neutral
current, per-phase voltage (VTs connected in “Wye”), or
phase-phase voltages (VTs connected in “Delta”), system
frequency, power, power factor, thermal capacity
Data Storage:........................................................Retained for 3 days
CLOCK
Setup:........................................................................Date and time
Daylight Saving Time
IRIG-B:.......................................................................Auto-detect (DC shift or Amplitude Modulated)
Amplitude modulated: 1 to 10 V pk-pk
DC shift: 1 to 10 V DC
Input impedance: 40 kOhm ± 10%
Accuracy with IRIG-B:....................................... ± 1 ms
Accuracy without IRIG-B:................................± 1 min / month
Control
LOGIC ELEMENTS
Number of logic elements: .............................16
Trigger source inputs per element: ............2 to 8
Block inputs per element: ...............................2 to 4
Supported operations: .....................................AND, OR, NOR, NAND, XOR, XNOR, Pickup / Dropout timers
Pickup timer:..........................................................0 to 60000 ms in steps of 1 ms
Dropout timer:......................................................0 to 60000 ms in steps of 1 ms
BREAKER CONTROL
Operation:...............................................................Asserted Contact Input, Logic Element, Virtual Input, Manual
Command
Function: .................................................................Opens / closes the feeder breaker
AUTORECLOSE (79)
Reclose attempts:...............................................Up to 4 shots
Time Delay Accuracy: ......................................0 to 3 cycles (AR Dead Time selected)
Elements: ................................................................Inputs, Outputs, Breaker Status (52 status)
SYNCHROCHECK (25)
Maximum frequency difference: .................0.05 to 5.00 Hz in steps of 0.01 Hz
Maximum Angle difference:...........................2° to 80° in steps of 1°
Maximum Voltage difference:.......................10 to 10000 V in steps of 1 V
Dead Bus and Dead Line level:.....................0.00 to 1.25 x VT in steps of 0.01 x VT
Live Bus and Live Line level:...........................0.03 to 1.25 x VT in steps of 0.01 x VT
SECOND HARMONIC INHIBIT
Operating Parameter:.......................................Current 2nd harmonic per phase or average
Pickup Level:..........................................................0.1% to 40.0% in steps of 0.1
Minimum Current:...............................................0.03 to 3.00 x CT in steps of 0.01 x CT
Time Delay:............................................................0.00 to 600.00 s in steps of 0.01 s
Time Delay Accuracy: ......................................±3% of expected time or 2 cycles, whichever is greater
Level Accuracy:....................................................±2% or ±10mA (whichever is greater)
