Built-in current transformers are designed for installation at the inputs of circuit breakers and power transformers, bushings, inputs passing through walls and floors.Transformers are used for transmission of measuring information signal to measuring, protection, automation, signalling and control devices in AC electrical installations of 50 and 60 Hz frequency.Transformers have climatic design "U", "T", "O", "XL" or "UHL" and placement category 1 or 2 according to GOST 15150. Transformers of placement category 2 - are designed for operation in transformer oil inside the tank of the switch or power transformer and in the air environment (in the absence of direct exposure to solar radiation and atmospheric precipitation).
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