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A trusted supplier of transformer oils for extremely low temperatures and severe weather conditions, Nynas has developed an Arctic grade oil that complies with the toughest climate conditions.
It now meets the toughest requirements for transformers in Canada, a country with its share of harsh winter weather.
“The last version of CAN/CSA-C50-14 is one of the world’s most advanced standards regulating the usage of mineral oils in transformers. This specification defines two classes of oils, Class A and Class B,” says Jayme Nunes, Senior Technical Advisor at Nynas Americas.
Class A oil is recommended for use in power transformers, especially those subject to cold start-up or that have forced oil cooling, including associated on-load tap changers (OLTC), all of which operate in ambient temperatures below -25°C. The OLTC is a piece of equipment embedded in the transformer that enables voltage regulation and/or phase shifting by varying the transformation ratio under load without interruption. Class B mineral oil is suitable for use in electrical equipment that operates in ambient temperatures of -25°C and above.
“NYTRO® Polaris GXN meets and exceeds the Class A Canadian specifications,” says Gutenberg Souza Oliveira, Sales Manager USA and Canada.
The right blend of the Naphthenic base oils and specific refining techniques of the new NYTRO® Polaris GXN allow a typical pour point temperature of -51°C, compared to the -46°C (max.) of the Canadian specification and a typical viscosity of 1,450 mm2/s at -40°C, compared to the 2,500 mm2/s of the same specification.
“This ensures the right conditions for heat transfer as well as for on-load tap changer operations in harsh climate situations,” adds Jayme Nunes. “The main differentials of these oils are the very low pour point temperature and the extremely low viscosity at -40°C, together with outstanding oxidation stability.”
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