GE iBox Installation And Maintenance Manual

Contents

GE Grid Solutions iBox/iBox KitInstallation and Maintenance GuideGE Information 994-0047-5.10-4 29Installation Guidelines, continuedPower Fusing Always replace fuses with the same type and rating used by GE Digital Energy. Thefuse types and ratings are stated in “Fuse Replacement” on page 59.Always fuse-protect field power sources.Groundingand ShieldingTo ensure safe operations, you must connect the iBox Protective Earth Terminal to alow impedance ground using braided cable or heavy solid copper conductor. Whenmaking ground connections, ensure all grounding surfaces are free of dirt, residueand corrosion.Ensure cable shields are grounded at either the iBox functional ground terminal or atthe field equipment. Do not ground the shields at more than one point because apotential difference may exist between grounds, resulting in ground loops andundesirable noise sources.To prevent electromagnetic interference from upsetting iBox operation, use cableswith an over-all cable shield. Route all communication cables away from power-carrying cables.Communi-cations PortsandConnectionsVerify the integrity of all communication cable connections prior to start-up to avoiddamaging the iBox.Serial ports are protected with surge and noise suppression components.Always shield communication cables and make them as short as possible.