Internal zero-sequence current transformers are designed for installation in complete switchgear (switchgear) internal installation, in prefabricated chambers of single-sided service (CSR), in other electrical installations. Transformers TZLK-NTZ-0.66 are manufactured in climatic version "U", "UHL" or "T" category of placement 2 according to GOST 15150-69, TZLKR-NTZ-0.66 - in climatic version "U" or "UHL" category of placement 2 according to GOST 15150-69.
Transformers intended for use in systems of normal operation of nuclear power plants (hereinafter referred to as NPs) belong to class 4 according to NP-001-97.
Transformers intended for use in safety-critical systems of normal operation of nuclear power plants belong to class 3 and have classification designation 3H according to NP-001-97.
Transformers intended for use in a system of important for safety of normal operation of a nuclear power plant are class 3 and have classification designation 3H according to NP-001-97.
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