Page 82 of Contactors and Motor Protection by Moeller Electric USA

overloadrelays technical data ec prototype test certification number ze z5 ptb 01 atex 3331 ptb 02 atex 3165 mounting position ze zb12 zb32 zb65 z5 protection of single-phase and dc current motors 1-pole 2-pole tripping characteristics these tripping characteristics are mean values of the spread at 20°c ambient temperature in a cold state tripping time depends on response current with devices at operating temperature the tripping time of the overload relay reduces to approximately 25 of the read off value 2h zb12 100 60 zb32 40 zb65 ze 20 10 6 4 2 1 40 3-phase 20 10 6 4 2-phase 2 1 0.6 1 1.5 2 3 4 6 8 1015 20 x setting current 2h 100 60 40 20 10 6 4 2 1 40 20 10 6 4 2 1 0.6 z5 3-phase 2-phase 1 1.5 2 3 4 6 8 1015 20 x setting current 2h 100 60 40 20 10 6 4 2 1 40 20 10 6 4 2 1 0.6 zw7 minutes minutes minutes highest level lowest level seconds seconds seconds 1 1.5 2 3 4 6 8 10 15 20 x rated current 83

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