BS 1975:1957

Specification. Primary cells and batteries for intrinsically safe circuits in coal mines

BSI Group , 01/01/1957

$132.00 $264.16

Wet and dry types. Dimensions of dry types, components of wet cells; containers, current-limiting resistors, connecting wires, terminals. Purity of zinc electrodes and electrolyte for wet cells, performance requirements include discharge and storage tests, current and voltage limitation tests.