ABB Distribution Protection Unit 1500R
Page ii
Table of Contents
Table of Contents ..................................................................................................................... ii
Guide to Figures .................................................................................................................... viii
Guide to Tables ......................................................................................................................... x
Introduction ............................................................................................................................. xi
Getting Started ........................................................................................................................ xii
Precautions ...................................................................................................................................................... xii
Password ......................................................................................................................................................... xii
DPU1500R Quick Start .................................................................................................................................... xiii
Initial Tripping ............................................................................................................................................ xiii
Reclosing .................................................................................................................................................. xiii
Section 1 Protective Functions
Protective Functions ...................................................................................................................................... 1-1
Summary of Protective Elements ................................................................................................................... 1-1
Phase Time Overcurrent Element 51P (3I>) .................................................................................................... 1-1
Ground Time Overcurrent Element 51N (IN>) .................................................................................................. 1-2
Phase Instantaneous Overcurrent Element 50P-1 (3I>>1) - Level 1, Low set ................................................... 1-3
Phase Instantaneous Overcurrent Element 50P-2 (3I>>2) - Level 2, Mid set .................................................... 1-4
Two Phase 50P (3I>>) Tripping ....................................................................................................................... 1-5
Phase Instantaneous Overcurrent Element 50P-3 (3I>>3) - Level 3, High set .................................................. 1-5
Ground Instantaneous Overcurrent Element 50N-1 (IN>>1) - Level 1, Low set ................................................. 1-5
Ground Instantaneous Overcurrent Element 50N-2 (IN>>2) - Level 2, Mid set .................................................. 1-6
Sensitive Earth Fault (SEF) Option, Definite Time ........................................................................................... 1-6
Ground Instantaneous Overcurrent Element 50N-3 (IN>>3) - Level 3, High set ................................................ 1-7
Negative Sequence Time Overcurrent Element 46 (Insc>) ............................................................................... 1-7
Ansi Timing Curves ......................................................................................................................................... 1-9
Ansi Time Overcurrent Curve Equation ............................................................................................................ 1-9
IEC Timing Curves ........................................................................................................................................ 1-10
IEC Time Overcurrent Curve Equation ........................................................................................................... 1-10
Undervoltage Element 27 (U<) ...................................................................................................................... 1-23
Cold Load Time ............................................................................................................................................. 1-23
Recloser Function 79 (O->I) .......................................................................................................................... 1-23
Lockout ........................................................................................................................................................ 1-24
Cutout Timer (O->I-CO) ................................................................................................................................. 1-25
Single Shot Reclose Logical Input 79S (O->I1) ............................................................................................. 1-25
Multi-Shot Reclose Logical Input 79M (O->I) ................................................................................................. 1-26
Voltage Block 79V (O->IU<) .......................................................................................................................... 1-26
Recloser Logical Inputs ................................................................................................................................. 1-27
Alternate Settings Group .............................................................................................................................. 1-28
Table of Contents