The KYN28A-12 (GZS1) indoor metal armored center-removed switchgear (hereinafter referred to as the switchgear) is a three-phase AC 50Hz complete power distribution device designed for accepting and distributing 3-12 kV network electricity while providing control, protection, and monitoring of circuits. This product allows for the installation of various types of microcomputer- based comprehensive relay protection devices on the relay room panel, enabling intelligent control of the system with functions such as remote control, telemetry, remote signaling, and remote adjustment through a field network controlled by a CAN bus with communication interfaces. It also features protective measures to prevent erroneous operation of the circuit breaker, prevent pushing or pulling the handcart under load, prevent closing the grounding switch when live, prevent power delivery with the grounding switch in the grounded position, and prevent accidental access to live compartments, collectively referred to as the "five prevention" functions. The cabinet can be equipped with VSI (ZN63), ZN12V vacuum circuit breakers, as well as imported VD4 vacuum circuit breakers and VC series vacuum contactors.
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