Robust safety switches for Zone 22 hazardous dust applications
20 July 2014
Eaton's Crouse-Hinds division has extended its range of safety switchgear with a new series of robust safety switches that are suitable for Zone 22 hazardous dust environments and for high ambient temperature industrial applications.
The GHG 981 series switches are protected by an IP66 enclosure and earth terminals. The enclosures are available in plastic, powder-coated sheet steel or electropolished stainless steel versions and can be fitted with flanges and cable glands. The robust, corrosion-resistant switches are suitable for harsh industrial environments with extreme ambient temperatures from -55 deg C to + 55 deg C.
For extra protection, the switches can be locked in the 'OFF' position by using up to three safety padlocks. The GHG 981 series is approved for use in Zone 22 hazardous dust environments such as flour/grain mills, sugar processing, woodworking, food processing, metal processing and other production environments where potentially explosive dusts are present.
GHG 981 switches are available in 3-, 4- or 6-pole versions in sizes ranging from 25A to 800A.
The switches provide full ac 23A motor switching capacity and isolating properties to EN 60947-3 with compulsory opening of the main current contacts. An optional ‘EMERGENCY-STOP’ version is available to EN 60204-1, which features a red handle with a yellow backplate. For extreme switching conditions, additional leading or lagging auxiliary contacts guarantee safety.
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