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BS 2538:1954
M00000444
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BS 2538:1954 Specification for air-cooled flameproof single-phase lighting transformer units supplied from high voltage systems
standard by BSI Group, 11/25/1954
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Full Description
Transformer units for supply voltages of 2200, 2750 or 3300 volts with ratings of 2.5 kVA and 5 kVA mainly for roadway lighting in mines. It specifies standard voltages, ratings, provision for earthing, primary isolating switch, protective fuses, particulars of temperature limits and a series of tests.Cross References:
BS 88
BS 171
BS 229
BS 542