JB/T 12762-2015Self-resetting overvoltage and undervoltage protectors (English PDF)

JB/T 12762-2015 is the English-translated version of 自恢复式过欠压保护器.

JB/T 12762-2015 is a recommended Chinese machinery industry standard covering overvoltage and undervoltage protective devices with an automatic reclosing function.

It gives terms and definitions, the classification, the characteristics, the marking and other product information, the operating conditions, the structural and operational requirements, the tests, and provisions for use and installation.

The devices in scope run at a rated frequency of 50 Hz with a rated voltage of no more than 400 V and a rated current of no more than 125 A, and are intended mainly for household and similar low-voltage distribution lines, where they disconnect on a voltage fault and reclose once the line voltage is normal again.

A pollution degree 2 environment is assumed. Among the standards it quotes are GB 14048.1-2012, GB 16916.1-2014, GB/T 17626.5 and GB 18499-2008.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

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