CHAPTER 1: INTRODUCTION
SPECIFICATIONS
345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE
9
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
