distributionpanels.Bolt-onQOBcircuitbreakersareforuseinNQOandNQODpanelboards. Operatingmechanism QOandQOBcircuitbreakershaveanovercenter,trip-freetogglemechanismwithquick-make,quick- breakactionandpositivehandleindication.Thetrippingmechanismsintwo-andthree-polecircuit ...