Guidelines for planning the electrical installation 67Additional requirements for explosion-safe (EX) motorsIf you use an explosion-safe (EX) motor, obey the rules in the requirements table above. Inaddition, consult the motor manufacturer for any further requirements.Additional requirements for ABB motors of types other than M2_, M3_, M4_, HX_and AM_Use the selection criteria given for non-ABB motors.Additional requirements for the braking applicationsWhen the motor brakes the machinery, the intermediate circuit DC voltage of the driveincreases, the effect being similar to increasing the motor supply voltage by up to20 percent. Consider this voltage increase when you specify the motor insulationrequirements if the motor is braking a large part of its operation time.Example: Motor insulation requirement for a 400 V AC line voltage application must beselected as if the drive were supplied with 480 V.Additional requirements for ABB high-output and IP23 motorsThe rated output power of high output motors is higher than what is stated for the particularframe size in EN 50347:2001. This table shows the requirements for ABB random-woundmotor series (for example, M3AA, M3AP and M3BP).Additional requirements for non-ABB high-output and IP23 motorsThe rated output power of high output motors is higher than what is stated for the particularframe size in EN 50347:2001. The table below shows the requirements for random-woundand form-wound non-ABB motors with nominal power smaller than 350 kW. For biggermotors, consult the motor manufacturer.Nominal AC supplyvoltageRequirement forMotor insulationsystemABB du/dt and common mode filters, insulated N-end motorbearings100 kW < PN < 200 kW PN > 200 kW140 hp < PN < 268 hp PN > 268 hpUN < 500 V Standard + N + N + CMF500 V < UN < 600 V Standard + du/dt + N + du/dt + N + CMForReinforced + N + N + CMF600 V < UN < 690 V Reinforced + du/dt + N + du/dt + N + CMFNominal AC supplyvoltageRequirement forMotor insulation system ABB du/dt filter, insulated N-end bearing and ABBcommon mode filterUN < 420 V Standard: ÛLL = 1300 V + N + CMF420 V < UN < 500 V Standard: ÛLL = 1300 V + N + du/dt + CMForReinforced: ÛLL = 1600 V,0.2 microsecond rise time+ N + CMF500 V < UN < 600 V Reinforced: ÛLL = 1600 V + du/dt + N + CMForReinforced: ÛLL = 1800 V + N + CMF
