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AS/NZS 3000:2018

Cl 2.5.3.1

Operating points of circuit-breakers and fuses

The MCB trip curve tool reads the 1.45 × In conventional operating current of Cl 2.5.3.1, and the 0.1 s instant trip and 0.4 s disconnection of Table 8.1.

Verified: read against the printed standard, pages 97, 427 (PDF = page + 4). Checked 2 Oct 2026.

Units: Value × IN for a multiple, s for a time

These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.

Back to its card on the AS/NZS 3000:2018 page

4 rows

Cl 2.5.3.1, Operating points of circuit-breakers and fuses
KindValue (× IN for a multiple, s for a time)ClausePage
multiple1.45Cl 2.5.3.197
multiple1.6Cl 2.5.3.197
time0.1Table 8.1 Note 3427
time0.4Table 8.1427

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