IEC 60143-2-2021 Series capacitors for power systems – Part 2: Protective equipment for series capacitor banks.
The object of this standard is:
– to formulate uniform rules regarding performance, testing and rating,
– to illustrate different kinds of overvoltage protectors,
– to provide a guide for installation and operation.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60044 (all parts), Instrument transformers
IEC 60044-1 , Instrument transformers – Part 1: Current transformers
IEC 60044-8, Instrument transformers – Part 8: Electronic current transformers
IEC 60060 (all parts), High-voltage test techniques
IEC 60076-1 , Power transformers – Part 1: General
IEC 60076-6:2007, Power transformers – Part 6: Reactors
IEC 60099-4:2009, Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c. systems
IEC 601 43-1 :2004, Series capacitors for power systems – Part 1: General
IEC 60255-5, Electrical relays – Part 5: Insulation coordination for measuring relays and protection equipment – Requirements and tests
IEC 60255-21 , Electrical relays – Part 21: Vibration, shock, bump and seismic test on measuring relays and protection equipment – Section One – Vibration tests (sinusoidal)
IEC 60270, High-voltage test techniques – Partial discharge measurements
IEC 60358-1 , Coupling capacitors and capacitor dividers – Part 1: General rules
IEC 60358-2, Coupling capacitors and capacitor dividers – Part 2: AC or DC single-phase coupling capacitor connected between line and ground for power line carrier frequency (PLC) application 1
IEC 60794-1 -1 , Optical fibre cables – Part 1: Generic specification – General
IEC 60794-2, Optical fibre cables – Part 2: Indoor cables – Sectional specification
IEC 61 000-4-29, Electromagnetic compatibility (EMC) – Part 4-29: Testing and measurement techniques – Voltage dips, short interruptions and voltage variations on d.c. input port immunity tests
IEC 61 1 09, Insulators for overhead lines – Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V – Definitions, test methods and acceptance criteria
IEC 61 300-3-4, Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-4: Examinations and measurements – Attenuation
IEC 61 869-3, Instrument transformers – Part 3: Additional requirements for inductive voltage transformers
IEC 61 869-5, Instrument transformers – Part 5: Additional requirements for capacitor voltage transformers
IEC 62271 -1 , High-voltage switchgear and controlgear – Part 1: Common specifications
IEC 62271 -1 02:2001 , High-voltage switchgear and controlgear – Part 102: Alternating current disconnectors and earthing switches
IEC 62271 -1 09:2008, High-voltage switchgear and controlgear – Part 109: Alternating current series capacitor bypass switches
NOTE No standard exists for varistors for series capacitors (SC). The relevant tests for series capacitors varistors
are therefore dealt with in this standard.
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply:
NOTE The definitions of capacitor parts and accessories in this standard are in accordance with IEC 601 43-1 :2004.
3.1  back-up gap
supplementary gap which may be set to spark over at a voltage level higher than the protective level of the primary protective device, and which is normally placed in parallel with the primary protective device
3.2 bank protection
general term for all protective equipment for a capacitor bank, or part thereof
3.3 bypass current
current flowing through the bypass switch or spark gap in parallel with the series capacitor
3.4 bypass switch
device such as a switch or a circuit-breaker used in parallel with a series capacitor and its overvoltage protector to shunt line current for a specified time, or continuously.IEC 60143-2 pdf download.