Manufacturers must comply with international and regional standards such as IEC 60076 or IEEE/ANSI C57 series for design, testing, insulation coordination, and performance. They may need ISO 9001 for quality management, ISO 14001 for environmental management, and ISO 45001 for occupational health and safety. For specific markets, utilities require type-test reports, routine-test certificates, and sometimes third-party certifications or grid code compliance. Seismic, fire, and EMC standards may also apply depending on installation conditions and regulatory frameworks.