DNV Type Approval (formerly DNV GL) for marine equipment - environmental classes according to DNV-CG-0339.
DNV Type Approval covers electrical, electronic and programmable components and systems intended for ships, offshore units and high-speed craft classed by DNV: electrical machines, main, emergency and distribution switchboards, power-management systems, transformers and converters, power electronics, cables, protective devices, measuring and control equipment.
The certificate states the product type, holder, application limitations (e.g. required installation in a shielded cabinet with a specified IP rating), tests performed according to DNV-CG-0339 and assigned location classes: Temperature, Humidity, Vibration, EMC and Enclosure.
DNV GL certificates issued before the name change remain valid; the transition period for product certificates is 5 years.
The certificate demonstrates that DNV reviewed the documentation and type-test results according to DNV-CG-0339 and assigned environmental classes for specified installation locations on a ship. The classes in the certificate limit application: a product with Temperature A (0–45 °C in the 2015 edition) and Enclosure B is suitable only for spaces with those conditions.
The certificate does not demonstrate compliance with railway standards (EN 50155, EN 45545) or requirements of other classification societies.
DNV performs design-documentation approval, product certification and survey after installation on the ship. The environmental test scope for a particular product is determined individually by DNV according to the application and installation location, using DNV-CG-0339. The certificate has a specified validity date and requires periodic assessment after 2 and 3.5 years to verify that there have been no changes to design, systems, software versions, components or materials.
The certificate specifies product marking requirements, such as a label with manufacturer name, part number and revision.
Check the certificate number (format TAxxxxxxxx), approved types, Application/Limitation section, assigned Temperature/Humidity/Vibration/EMC/Enclosure classes and the “valid until” date; verify the entry in DNV Approval Finder.
