CSA C50089:99 (R2026)

CSA Preface This is the first edition of CSA Standard CAN/CSA-C50089, Cast resin partitions for metal-enclosed gas-filled high-voltage switchgear and controlgear, which is an adoption, with Canadian deviations, of the identically titled CENELEC (European Committee for Electrotechnical Standardization) Standard EN 50 089 : 1 992 (1 992-05) including Amendment Al :1 994. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 2.1 Type of Equipment This standard applies to cast resin partitions pressurized with inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or a mixture of such gases, such as sulphur hexafluoride and nitrogen used in indoor and outdoor installations of high-voltage switchgear and controlgear, where the gas is used principally for its dielectric and/or arc-quenching properties, with rated voltages (a) 1 kV and up to and including 52 kV and with gas-filled compartments with design pressure greater than 3 bar (gauge); and (b) 72.5 kV and above. The partitions comprise pressurized barriers in electrical equipment not necessarily limited to the following examples: - Circuit breakers - Switch disconnectors - Disconnectors - Earthing switches - Current transformers - Voltage transformers  -Surge arresters - Busbars and connections - Cable and connections. This standard does not apply to high-voltage bushings (see HD 358 S3 (IEC 517)). 2.2 Quality assurance It is the intention of this standard that the switchgear manufacturer shall be responsible for achieving and maintaining a consistent and adequate quality of product. Sufficient examinations shall be made by the partition manufacturer to ensure that the materials, production and testing comply in all respects with the requirements of this standard. Inspections by the users' inspectors shall not absolve the switchgear manufacturer from his responsibility to exercise such quality assurance procedures as to ensure that the requirements and intent of this standard are satisfied. NOTE. Reference should he made to the EN 2900() series of standards for quality assurance systems.