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Mineral insulating oils. Determination of kinematic viscosity at very low temperatures. Original standard BS EN 61868-1999 in PDF full version. Additional info + preview on request

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Instrument transformers - Additional requirements for current transformers. Original standard BS EN 61869-2-2012 in PDF full version. Additional info + preview on request

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Instrument transformers - Additional requirements for inductive voltage transformers. Original standard BS EN 61869-3-2011 in PDF full version. Additional info + preview on request

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Instrument transformers - Additional requirements for combined transformers. Original standard BS EN 61869-4-2014 in PDF full version. Additional info + preview on request

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Instrument transformers - Additional requirements for capacitor voltage transformers. Original standard BS EN 61869-5-2011 (2015) in PDF full version. Additional info + preview on request

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Instrument transformers - Additional general requirements for low-power instrument transformers. Original standard BS EN 61869-6-2016 in PDF full version. Additional info + preview on request

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