Processing Magazine

Ground Fault Circuit Interrupter

August 22, 2013

Littelfuse SB6100 Series Industrial Shock-BlockLittelfuse's SB6100 Series Industrial Shock-Block™ is the first and only ground fault circuit interrupter (GFCI) device to meet UL 943C Class C and Class D requirements. Until now, GFCI devices have not been practical in industrial settings. Thanks to higher trip level standards and advanced filtering technology, industrial workers can finally be protected against dangerous electric shock. GFCI devices operate by sensing a ground fault and opening the circuit very quickly. However, residential GFCI devices are too sensitive to operate in industrial applications without nuisance tripping. The brand new UL 943C standard covers such GFCI devices, designed to be used with systems up to 600V and higher leakage current higher than residential GFCI devices.