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350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 1: INTRODUCTION
SENSITIVE GROUND CURRENT INPUT
CT Primary: ............................................................1 to 600 A
Range:......................................................................0.002 to 3 × CT
Input type:..............................................................1 A, 5 A, or 1/5 A (must be specified with order)
Nominal frequency:...........................................50/60 Hz
Burden: ....................................................................<0.1 VA at rated load
Accuracy: ...............................................................3%
±10 mA or ±20% of reading from 0.02 to 0.19 × CT, whichever
is greater
CT withstand:........................................................1 second at 100 A (1 A option)
1 second at 400 A (5 A or universal CT option)
2 seconds at 40 × rated current
continuous at 3 × rated current
PHASE/AUX VOLTAGE INPUTS
Source VT: ..............................................................0.15 to 550 kV / 50 to 220 V
VT secondary range:.........................................50 to 240 V
VT ratio: ...................................................................1.0 to 5000.0 in steps of 0.1
Nominal frequency:...........................................50/60 Hz
Relay burden: .......................................................<0.25 VA at 120 V
Accuracy: ...............................................................±1.0% throughout range
Voltage withstand: .............................................260 VAC continuous
Outputs
ARC FLASH OPTION
FORM-A RELAYS
Configuration: ...................................................... 2 (two) electromechanical
Contact material:................................................ silver-alloy
Operate time:........................................................ <8 ms
Continuous current:........................................... 10 A
Make and carry for 0.2s: ................................. 30 A per ANSI C37.90
Break (DC inductive, L/R=40 ms):................. 24 V / 1 A
48 V / 0.5 A
125 V / 0.3 A
250 V / 0.2 A
Break (DC resistive): ........................................... 24 V / 10 A
48 V / 6 A
125 V / 0.5 A
250 V / 0.3 A
Break (AC inductive):.......................................... 720 VA @ 240 VAC Pilot duty A300
Break (AC resistive):............................................ 250 VAC / 10 A
Ratings per UL Certification:
Break (AC resistive):............................................ 250 VAC / 10 A GEN USE
Continuous Current: .......................................... 10 A
FORM-A VOLTAGE MONITOR
Applicable voltage:............................................. 20 to 250 VDC
Trickle current: ..................................................... 1 to 2.5 mA
