1–10
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 1: INTRODUCTION
Metering
PHASE & GROUND CURRENT INPUTS
CT Primary: ............................................................1 to 6000 A
Range:......................................................................0.02 to 20 × CT
Input type:..............................................................1 A or 5 A (must be specified with order P1G1 or P5G5)
Configurable 1 A or 5 A (must be specified with order P0G0)
Nominal frequency: ...........................................50/60 Hz
Burden: ....................................................................<0.1 VA at rated load
Accuracy:................................................................±1% of reading at 1× CT
±3% of reading from 0.2 to 20 × CT
±20% of reading from 0.02 to 0.19 × CT
CT withstand:........................................................1 second at 100 × rated current
2 seconds at 40 × rated current
continuous at 3 × rated current
SENSITIVE GROUND CURRENT INPUT
CT Primary: ............................................................1 to 600 A
Range:......................................................................0.002 to 3 × CT
Input type:..............................................................1 A or 5 A (must be specified with order P1S1 or P5S5)
Configurable 1 A or 5 A (must be specified with order P0S0)
Nominal frequency: ...........................................50/60 Hz
Burden: ....................................................................<0.1 VA at rated load
Accuracy:................................................................±1% of reading at 0.1× CT
±3% of reading from 0.02 to 3 × CT
±20% of reading from 0.002 to 0.019 × CT
CT withstand:........................................................1 second at 100 × rated current
2 seconds at 40 × rated current
continuous at 3 × rated current
Data capture
TRANSIENT RECORDER
Buffer size: .............................................................3 s
No. of buffers:......................................................1x192, 3x64, 6x32
No. of channels:..................................................14
Sampling rate:......................................................32 samples per cycle
Triggers: ..................................................................Manual Command
Contact Input
Virtual Input
Logic Element
Element Pickup/Trip/Dropout/Alarm
Data: .........................................................................AC input channels
Contact input state
Contact output state
Virtual input state
Logic element state
Data storage:........................................................RAM - battery backed-up; retained for 3 days
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, ground differential current, negative sequence
current, restraint current, per-phase differential current,
per-phase differential second harmonic current, thermal
capacity
Data Storage: .......................................................RAM - battery backed up; retained for 3 days
