Power pack EN 92 Ex Power pack EN 92 Ex is suitable for direct use in areas with potentially explosive atmospheres (zones 1 or 2). The units comply with the European ATEX directives. All high-voltage components are accommodated in a flameproof housing. The power pack EN 92 Ex is equipped with two high-voltage ports for the connection of the ionizing units. No long high-voltage cables are required, as the power pack can be installed in the immediate vivinity of the ionizing unit. The power pack EN 92 Ex has been approved for operating the ionizing bar EI Ex T or ring ionizers RI Ex O/M/V .