IEC 60143-2:2012 covers protective equipment for series capacitor banks, with a size larger than 10 Mvar per phase. Protective equipment is defined as the main circuit apparatus and ancillary equipment, which are part of a series capacitor installation, but which are external to the capacitor part itself. The recommendations for the capacitor part are given in IEC 60143-1:2004. The protective equipment is mentioned in Clause 3 and 10.6 of IEC 60143-1:2004. This second edition cancels and replaces the first edition published in 1994. It constitutes a technical revision. The main changes with respect to the previous edition are: – updated with respect to new and revised component standards; – updates with respect to technology changes. Outdated technologies have been removed, i.e. series capacitors with dual self-triggered gaps. New technologies have been added, i.e. current sensors instead of current transformers; – the testing of spark gaps has been updated to more clearly specify requirements and testing procedures. A new bypass making current test replaces the old discharge current test; – Clause 5, Guide, has been expanded with more information about different damping circuits and series capacitor protections. Keywords: protective equipment for series capacitor banks<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 8<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 2 Normative references Figures Figure 1 \u2013 Typical nomenclature of a series capacitor installation <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4 Quality requirements and tests 4.1 Overvoltage protector <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 4.2 Protective spark gap 4.2.1 Purpose 4.2.2 Classification of triggering principles 4.2.3 Tests Figure 2 \u2013 Classification of overvoltage protection <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure 3 \u2013 Illustration of waveforms in recovery voltage test <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 4.3 Varistor 4.3.1 Purpose 4.3.2 Classification <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 4.3.3 Tests <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 4.4 Bypass switch 4.5 Disconnectors and earthing switches 4.5.1 Purpose <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 4.5.2 Classification 4.5.3 Tests <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 4.6 Discharge current-limiting and damping equipment (DCLDE) 4.6.1 Purpose 4.6.2 Classification 4.6.3 Tests <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 4.7 Voltage transformer 4.7.1 Purpose 4.7.2 Classification 4.7.3 Tests <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 4.8 Current sensors 4.8.1 Purpose 4.8.2 Classification 4.8.3 Current transformer tests 4.8.4 Electronic transformer tests 4.8.5 Optical transducer tests <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 4.9 Coupling capacitor 4.9.1 Purpose 4.9.2 Tests 4.10 Signal column 4.10.1 Purpose 4.10.2 Tests 4.11 Fibre optical platform links 4.11.1 Purpose <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 4.11.2 Tests 4.12 Relay protection, control equipment and platform-to-ground communication equipment 4.12.1 Purpose 4.12.2 Classification 4.12.3 Tests <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 5 Guide 5.1 General 5.2 Specification data for series capacitors <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 5.3 Protective spark gap <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 5.4 Varistor 5.4.1 General Table 1 \u2013 Summary of varistor energy absorption design criteria (example) <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 5.4.2 Varistor voltage-current characteristic <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | 5.4.3 Varistor current and voltage waveforms during a system fault Figure 4 \u2013 Typical voltage-current characteristics of one specific metal oxide varistor element (95 mm diameter) <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | 5.4.4 Comments on varistor definitions and type tests Figure 5 \u2013 Current, voltage and energy waveforms for a phase-to-earth fault <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 5.5 Bypass switch 5.6 Disconnectors 5.7 Discharge current-limiting and damping equipment 5.7.1 Purpose of the Discharge Current-Limiting and Damping Equipment <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 5.7.2 Location of the DCLDE Figure 6 \u2013 Conventional location in the bypass branch Figure 7 \u2013 DCLDE in series with the capacitor and the parallel connected MOV Figure 8 \u2013 DCLDE in series with the capacitor and parallel to the MOV <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 5.7.3 Configuration of the DCLDE Figure 9 \u2013 Only a discharge current-limiting reactor Figure 10 \u2013 Discharge current-limiting reactor connected in parallel with a damping resistor. A varistor is connected in series with the resistor Figure 11 \u2013 Discharge current-limiting reactorconnected in parallel with a damping resistor.A small spark gap is connected in series with the resistor <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | 5.7.4 Miscellaneous comments regarding the DCLDE Figure 12 \u2013 Current-limiting and damping equipment with and without damping resistor <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | 5.8 Voltage transformer 5.9 Current transformer 5.10 Relay protection, control equipment and platform-to-ground communication equipment <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 5.11 Protection redundancy Table 2 \u2013 Overview of typical series capacitor bank protections <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 5.12 Commissioning tests 5.13 Energization tests <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Series capacitors for power systems – Protective equipment for series capacitor banks<\/b><\/p>\n |