IEC 61869-15:2018 provides all requirements specific to voltage transformers to be used in DC applications (DCVTs), whatever the technology used. The output signal can be analogue or digital. It is applicable to newly manufactured voltage transformers used for measuring, protection and\/or control applications in DC power systems with a rated voltage above 1,5 kV. This document covers passive voltage dividers as well as active voltage transformers, used for measurement, control and protection. The general configuration of a single-pole low-power instrument transformer is described in Figure 601 of IEC 61869-6:2016. IEC 61869-15:2018 applies to voltage transformers (VT) intended to be used in DC applications with the following functions: \u2022 measure DC voltage (with significant harmonics); \u2022 withstand DC voltage. Two main technologies of DC converters exist today: LCC and VSC \u2022 Line-commutated converters (LCC) are based on thyristor converters. They are characterized by a single direction of current flow, and a voltage polarity reversal possibility. Significant voltage and current harmonics exist up to frequencies of about 3 kHz to 4 kHz. \u2022 Voltage source converters (VSC) are based on transistor converters. They are characterized by a bi-directional current flow and a single voltage polarity. Voltage and current harmonics exist up to frequencies of about 20 kHz.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | INTRODUCTION Figures Figure 1501 \u2013 Position of the DCVT\u2019s in the DC scheme Tables Table 1501 \u2013 Voltage on DCVT\u2019s <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions, abbreviated terms and symbols <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Figure 1502 \u2013 Typical step responses of a system <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Table 3 \u2013 Partial discharge test voltages and permissible levels <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure 1503 \u2013 Accuracy limits of a DCVT Table 1502 \u2013 Limits of ratio error for DCVT (classes from 0,1 to 3) <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Table 7 \u2013 Static withstand test loads <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Table 8 \u2013 Arc fault duration and performance criteria <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Table 1503 \u2013 Markings of terminals <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Table 1504 \u2013 Rating plate marking for common rating plate Table 1505 \u2013 Rating plate marking for each secondary converter <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 1506 \u2013 Rating plate marking for auxiliary power supply <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Table 10 \u2013 List of tests <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure 1504 \u2013 RC divider with low-voltage part outside the main housing <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure 1505 \u2013 Connection for voltage withstand test of the external low voltage part of a DCVT <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Figure 1506 \u2013 Polarity reversal test profile <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure 1507\u2013 Measurement of the step response time <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Annex 15A(informative)Proposed rated insulation level applicable to voltage transformers for DC application Table 15A.1 \u2013 Proposed rated primary terminal insulation levels for voltage transformers for DC application <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Instrument transformers – Additional requirements for voltage transformers for DC applications<\/b><\/p>\n |