BS EN 62155:2003(2004) Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000 V
2003BS EN 62155:2003 Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000 V
1973BS 4963:1973 Specification for tests on hollow insulators for use in high voltage electrical equipment