Allen Bradley PowerFlex 40 Quick Start Manual - cemco * electric , inc

English-7Input Power ConditionsInput Power ConditionCorrective ActionLow Line Impedance (less than 1% line reactance) • Install Line Reactor (2)Greater than 120 kVA supply transformer• or Isolation Transformer• or Bus Inductor – 5.5-11 kW(7.5-15 HP) drives onlyLine has power factor correction capacitors • Install Line ReactorLine has frequent power interruptionsLine has intermittent noise spikes in excess of6000V (lightning)• or Isolation TransformerPhase to ground voltage exceeds 125% of normalline to line voltageUngrounded distribution system240V open delta configuration (stinger leg) (1)• Remove MOV jumper to ground.• or Install Isolation Transformerwith grounded secondary ifnecessary.• Install Line Reactor(1)For drives applied on an open delta with a middle phase grounded neutral system, thephase opposite the phase that is tapped in the middle to the neutral or earth isreferred to as the “stinger leg,” “high leg,” “red leg,” etc. This leg should be identifiedthroughout the system with red or orange tape on the wire at each connection point.The stinger leg should be connected to the center Phase B on the reactor. Refer to thePowerFlex 40 User Manual on CD for specific line reactor part numbers.(2) Refer to Appendix B of the PowerFlex 40 User Manual on CD for accessory orderinginformation.I/O Wiring Recommendations (3)Wire Type(s) (4) Description Minimum InsulationRatingBelden 8760/9460(or equiv.)Belden 8770(or equiv.)0.8 mm 2 (18AWG), twisted pair, 100% shieldwith drain.0.8 mm 2 (18AWG), 3 conductor, shielded forremote pot only.300V60 degrees C(140 degrees F)(3)If the wires are short and contained within a cabinet which has no sensitive circuits,the use of shielded wire may not be necessary, but is always recommended.(4) Stranded or solid wire.I/O Terminal Block SpecificationsFrame Maximum Wire Size (5) Minimum Wire Size (5) TorqueB & C 1.3 mm 2 (16 AWG) 0.13 mm 2 (26 AWG) 0.5-0.8 N-m (4.4-7 lb.-in.)(5)Maximum / minimum that the terminal block will accept - these are notrecommendations.Refer to the PowerFlex 40 User Manual on CD for maximum power andcontrol cable length recommendations.