Built-in current transformers TV-SVEL of placement category 1 according to GOST 15150 - outdoor installation, designed for operation in the open air (installation outside the inputs of power transformers and switches, bushings, inputs passing through walls or floors). Insulation, providing the electrical strength of the transformer, is the insulation of the high-voltage input, bushing insulator, etc.
and the air gap.Transformers of placement category 2 according to GOST 15150 are designed for operation in transformer oil inside the tank of a power transformer or switch, in air or gas-insulated environment (in the absence of direct exposure to solar radiation and atmospheric precipitation). Transformers of placement category 2 according to GOST 15150 with moulded insulation are designed for operation as part of indoor and outdoor switchgear, current conduits and blocks of linear and zero generator outputs.
Insulation, providing electrical strength, is the insulation of the case.
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