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변압기 1차측/2차측 과전류 보호 기준(Transformer Overcurrent Protection Standards), 차단기 용량(암페어, A) 산정(선정) 규정(법령, 법규, 기준, 규칙, 법, 근거, CODE, 코드)
🔹 NEC (미국) ARTICLE 450 — TRANSFORMERS AND TRANSFORMER VAULTS (INCLUDING SECONDARY TIES) 450.3 Overcurrent Protection. Overcurrent protection of transformers shall comply with 450.3(A), (B), or (C). As used in this section, the word transformer shall mean a transformer or polyphase bank of two or more single-phase transformers operating as a unit. 📌 450.3 과전류 보호(Overcurrent Protection) 규정 해석 ..
2025. 3. 22.
