Telemecanique Altivar 56 manual - Northern Industrial

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Bulletin No. 50006-519-01BDecember 1996Chapter 2 — WiringControl Wiring PrecautionsControl Wiring PrecautionsOutput Wiring PrecautionsAll control inputs and outputs of the drive controller are isolated from the inputlines, however certain control wiring precautions must be followed:• Control wiring conductor runs must be kept short and direct. Follow theconduit and circuit separation requirements listed in “WIRING” on page 16.• Control contacts used with the drive controller inputs must be rated foroperation at open circuit voltages of 24 VDC and closed circuit currents of10 mADC.• Twisted cable with a pitch of 1 to 2 inches is required for analog inputs andoutputs. Use of a cable shield is recommended. The shield must be terminatedto ground at one end only. It is recommended that the shield be terminated atthe drive controller. Shield connection terminals are provided on the ALTIVAR56 drive controller for this purpose.• The coils of all relays and solenoids connected to the output contacts of thedrive controller must be equipped with appropriate transient suppressors.• For proper control wiring, conductors must be routed to avoid contact withother voltage potentials in the drive controller. Wire insulation must have theappropriate voltage rating for the voltage present.WARNINGDRIVE CONTROLLER DAMAGEDrive controller will be damaged if input line voltage is applied to output terminals(U/T1, V/T2, W/T3). Check power connections before energizing drive controller.Failure to follow these instructions can result in death, serious injury, orequipment damage.The drive controller is sensitive to the amount of capacitance (either phase-tophaseor phase-to-ground) present on the output power conductors. If excessivecapacitance is present, the drive controller may trip. Follow the guidelines belowwhen selecting output cable:• Cable type: the cable selected must have a low capacitance phase-to-phase andto ground. Do not use mineral impregnated cable because it has a very highcapacitance. Immersion of cables in water increases capacitance.• Cable length: the longer the cable, the greater the capacitance. Cable lengthsgreater than 100 ft (30.5 m) may cause problems.• Proximity to output cables from other drive controllers: because of the highfrequency switching and increased capacitance, the drive may fault undersome conditions.• Do not use lightning arrestors or power factor correction capacitors on outputof drive controller.For installation where cable capacitances may be a problem, an inductor can beinstalled between the drive controller and the motor. See catalog or consult factoryfor additional information.CAUTIONDRIVE CONTROLLER SWITCH FAILUREFor proper drive controller electronic short circuit protection, inductance is required inthe output power wiring. Provide at least 48 in (122 cm) of cable at the drive controlleroutput (U/T1, V/T2, W/T3).Failure to follow this instruction can result in equipment damage.© 1996 Square D All Rights Reserved17ηττπ://νιχοντρολσ.χοm
Chapter 2 — WiringBulletin No. 50006-519-01BGrounding December 1996GroundingFor safe, dependable operation, drive controllers must be grounded according toall national and local codes. To ground the drive controller:• Connect a copper wire from the grounding terminal to the power systemground conductor. Wire size is determined by the drive controller size and bynational and local codes.• Verify that resistance to ground is one ohm or less. Improper grounding causesintermittent and unreliable operation.DANGERHAZARDOUS VOLTAGE—INADEQUATE GROUNDING• Ground equipment using screw provided. Drive controller must be properlygrounded before applying power.• Do not use metallic conduits or shields as a ground conductor.Failure to follow these instructions will result in death or serious injury.Multiple drive controllers must be grounded as shown in Figure 7. Do not loop orseries the ground cables.YESNODrive ControllerDrive ControllerDrive ControllerDrive ControllerDrive ControllerDrive ControllerDrive ControllerDrive ControllerDrive ControllerFigure 7:Grounding Multiple Drive Controllers• When using the metal conduit entry plate (kit VY1A66201) with ATV56U41N4to D23N4 and ATV56U41M2 to D16M2 drive controllers, the bond wire mustbe connected to ground (GND) as shown in Figure 9 on page 22.18 © 1996 Square D All Rights Reservedηττπ://νιχοντρολσ.χοm
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Telemecanique Altivar 56 manual - Northern Industrial

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