ABB ACS 601 Hardware Manual

Contents

ABB ACS 601 Hardware Manual Manual pdf 30 page image

Chapter 3 – Electrical Installation3-4ACx=ACS/ACC/ACPACS/ACC/ACP 601 Drivessymmetrical grounds is the best type of wiring to provide a good lowimpedance high frequency ground return path between the motor andthe drive. This helps to prevent high frequency ground current fromflowing in a potentially damaging path through the motor bearings andconnected load bearings. Type MC continuous corrugated aluminumarmor cable with symmetrical grounds is highly recommended formotor connections to drives rated 490 KVA and larger.Conduit Metallic conduit must be used for motor wiring unless armored cable isused. Where conduits must be coupled together, the joint must bebridged with a ground conductor bonded to the conduit on each side ofthe joint. The conduits must also be bonded to the drive enclosure. Useseparate conduits for input power, motor, brake resistors and controlwiring. The recommended wiring configuration is shown on page 3-8.Do not run motor wiring from more than one drive in the same conduit.Armored Cable If metallic conduit is not used, type MC continuous corrugatedaluminum armor cable with symmetrical grounds must be used for themotor cables. If type MC armor cables are used, the motor cables canbe run in the same cable tray as other 480V or 600V power wiring.Control and signal cables must not be run in the same tray as powercables.Six conductor (3 phases and 3 grounds) type MC continuouscorrugated aluminum armor cable with symmetrical grounds isavailable from the following suppliers. Trade names are inparentheses.Anixter Wire & Cable (Philsheath)BICC Cables Corp. (Philsheath)Rockbestos Co. (Gardex)Oaknite (CLX)Control Cables All control cables must be shielded. As a general rule, the controlsignal cable shield should be grounded directly in the ACx 600. Theother end of the shield should be left unconnected. Twisting the signalwire with its return wire reduces disturbances caused by inductivecoupling. Pairs should be twisted as close to terminals as possible.A double shielded twisted pair cable (Figure a, e.g. Belden 9729) mustbe used for analog signals and is recommended for the pulse encodersignals. Employ one individually shielded pair for each signal. Do notuse common return for different analog signals.A double shielded cable is the best alternative for low voltage digitalsignals but single shielded twisted multipair cable (Figure b) is alsousable.