ʻO ka retronuef thermal relay kahi relay e pale i nā lako uila ma o ka nānāʻana i ka wela i ka wā o ke kumu. I ka wā eʻoi aku ka nui o kēia manawa i ka waiwai nui, e hana koke ka mea i hoʻopiliʻia i ke kalaka a pale aku i ka pōʻino i nā mea hana ma luna o ka nui.
Overload Protection: I ka wā eʻoi aku ka nui o ka carcuit i ka waiwai nui e hiki ai i nā mea hana ke pale aku i nā mea hana e hiki ai ke pale aku i ka hanaʻana i nā mea hana
ʻO ka pale pōkole pōkole: i ka wā e hele ai kahi kaʻa pōkole i ka carcuit, hiki i ka relay ke kāpae i ka carcuit a e pale i ka hana i nā mea hana pōkole.
ʻO ka paleʻo Phase: Ma kahi'āpanaʻekoluʻekolu, inā e loaʻa ka nalowale o ka phase, e nānā a wehe i ka hana maʻamau o nā lako hana.