Planning the electrical installation51Example 1: When the supply voltage is 440 V and the drive is operating in the motormode only, the maximum peak voltage in the motor terminals can be approximatedas follows: 440 V · 1.35 · 2 = 1190 V. Check that the motor insulation systemwithstands this voltage.Requirements tableThe following table shows how to select the motor insulation system and whenoptional ABB du/dt filters, insulated N-end (non-drive end) motor bearings and ABBcommon mode filters are required. Failure of the motor to fulfil the followingrequirements or improper installation may shorten motor life or damage the motorbearings and voids the 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 hpandframe size <NEMA 500134 hp < PN < 469 hporframe size >NEMA 500PN > 469 hporframe size >NEMA 580ABBRandom-wound M2_,M3_ andM4_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(cable length <150 m)Reinforced + du/dt + du/dt + N + du/dt + N + CMF600 V < UN < 690 V(cable length >150 m)Reinforced - + N + N + CMFForm-woundHX_ andAM_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 the motormanufacturer.+ du/dt with voltages over 500 V + N + CMFRandom-wound HX_and AM_ **0 V < UN < 500 V Enamelled wire withfibre glass taping+ N + CMF500 V < UN < 690 V + du/dt + N + CMFHDP Consult the motor manufacturer.
