Hitachi RET670 Commissioning Manual page 16

Table of contents
11.12.4 Scheme communication logic for residual overcurrent protection ECPSCH ..................255
11.12.4.1
11.12.4.2
11.12.4.3
11.12.5 Current reversal and weak-end infeed logic for residual overcurrent protection
ECRWPSCH .................................................................................................................. 257
11.12.5.1
11.12.5.2
11.12.5.3
11.13 Logic..................................................................................................................................259
11.13.1 Tripping logic, common 3-phase output SMPPTRC .......................................................259
11.13.1.1
11.13.1.2
11.13.1.3
11.13.1.4
11.13.1.5
11.13.1.6
11.14 Monitoring..........................................................................................................................262
11.14.1 Gas medium supervision SSIMG.................................................................................... 262
11.14.1.1
11.14.1.2
11.14.1.3
11.14.1.4
11.14.2 Liquid medium supervision SSIML.................................................................................. 263
11.14.2.1
11.14.2.2
11.14.2.3
11.14.2.4
11.14.3 Breaker monitoring SSCBR.............................................................................................265
11.14.3.1
11.14.3.2
11.14.4 Event function EVENT.....................................................................................................266
11.14.5 Limit counter L4UFCNT...................................................................................................266
11.14.5.1
11.14.6 Estimation of transformer insulation life LOLSPTR ........................................................ 267
11.14.6.1
11.14.6.2
11.14.7 Through fault monitoring PTRSTHR .............................................................................. 268
11.14.7.1
11.14.7.2
11.14.8 Function revision history..................................................................................................269
11.14.9 Current harmonic monitoring CHMMHAI.........................................................................269
11.14.9.1
11.14.9.2
10
Function revision history............................................................................................ 256
Testing the directional comparison logic function.......................................................256
Completing the test.................................................................................................... 257
Testing the current reversal logic............................................................................... 257
Testing the weak-end infeed logic.............................................................................. 258
Completing the test.................................................................................................... 259
Function revision history............................................................................................ 259
3 phase operating mode............................................................................................ 259
1ph/3ph operating mode ........................................................................................... 260
1ph/2ph/3ph operating mode .................................................................................... 260
Circuit breaker lockout............................................................................................... 261
Completing the test.................................................................................................... 262
Function revision history............................................................................................ 262
Testing the gas medium supervision for pressure alarm and pressure lockout
conditions .................................................................................................................. 263
Testing the gas medium supervision for temperature alarm and temperature
lockout conditions ......................................................................................................263
Completing the test.................................................................................................... 263
Function revision history............................................................................................ 264
Testing the liquid medium supervision for level alarm and level lockout conditions...264
Testing the gas medium supervision for temperature alarm and temperature
lockout conditions.......................................................................................................264
Completing the test.................................................................................................... 265
Verifying the settings.................................................................................................. 265
Completing the test.................................................................................................... 266
Completing the test.................................................................................................... 267
Verifying the signals and settings...............................................................................267
Completing the test.................................................................................................... 268
Verifying the signals and settings...............................................................................268
Completing the test.................................................................................................... 269
Verifying the signals and settings...............................................................................269
Completing the test.................................................................................................... 270
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1MRK 504 165-UEN Rev. K
Transformer protection RET670
Commissioning manual