This comprehensive guide explores everything you need to know about low voltage busbar insulators for switchgear applications, from material selection to installation best practices, helping engineers and procurement professionals make informed decisions for their electrical. This comprehensive guide explores everything you need to know about low voltage busbar insulators for switchgear applications, from material selection to installation best practices, helping engineers and procurement professionals make informed decisions for their electrical. I agree that Rittal BmbH & Co. KG may process the personal data that I have provided above in order to send me information about system solutions relating to enclosures, power distribution, climate control and IT for marketing purposes. What Does IEC 61439 Require for Low Voltage Switchgear Design? IEC 61439. This IOGP Specification was prepared by a Joint Industry Programme 33 Standardization of Equipment Specifications for Procurement organized by IOGP with support by the World Economic Forum (WEF). Whilst every effort has been made to ensure the accuracy of the information contained in this. IEC 61439 is a standard developed by the International Electrotechnical Commission (IEC) that covers design verification for low-voltage electrical products and assemblies. The IEC 61439. Our portfolio comprises power distribution boards, busbar trunking systems, distribution boards, protection, switching, measuring and monitoring devices, switches and socket outlets.