Planning the electrical installation35Requirements tableThe following table shows how to select the motor insulation system and when an optional ABB du/dtfilter, insulated N-end (non-driven end) motor bearings and ABB common mode filters are required. Themotor manufacturer should be consulted regarding the construction of the motor insulation andadditional requirements for explosion-safe (EX) motors. Failure of the motor to fulfil the followingrequirements or improper installation may shorten motor life or damage the motor bearings and voidsthe warranty.ManufacturerMotor type Nominal mainsvoltage (AC linevoltage)Requirement forMotor insulationsystemABB du/dt filter, insulated N-end bearing and ABB common modefilterPN < 100 kWandframe size < IEC 315100 kW < PN < 350 kWorframe size > IEC 315PN > 350 kWorframe size > IEC 400PN < 134 HPand frame size <NEMA 500134 HP < PN < 469 HPor frame size >NEMA 500PN > 469 HPor frame size >NEMA 580ABBRandom-wound M2_and M3_UN < 500 V Standard - + N + N + CMF500 V < UN < 600 V Standard + du/dt + du/dt + N + du/dt + N + CMForReinforced - + N + N + CMF600 V < UN < 690 V Reinforced + du/dt + du/dt + N + du/dt + N + CMFForm-woundHX_ and AM_380 V < UN < 690 V Standard n.a. + N + CMF PN < 500 kW: + N +CMFPN > 500 kW: + N +CMF + du/dtOld* form-wound HX_and modular380 V < UN < 690 V Check with themotormanufacturer.+ du/dt with voltages over 500 V + N + CMFRandom-wound HX_and AM_ **0 V < UN < 500 V Enamelled wirewith fibre glasstaping+ N + CMF500 V < UN < 690 V + du/dt + N + CMF
