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

English-3Typical GroundingR/L1S/L2T/L3U/T1V/T2W/T3SHLDDisconnecting MOVsTo prevent drive damage, the MOVs connected to ground shall bedisconnected if the drive is installed on an ungrounded distributionsystem where the line-to-ground voltages on any phase could exceed125% of the nominal line-to-line voltage. To disconnect these devices,remove the jumper shown in the figures below.1. Turn the screw counterclockwise to loosen.2. Pull the jumper completely out of the drive chassis.3. Tighten the screw to keep it in place.Jumper LocationIP20, NEMA/UL Type OpenIP66, NEMA/UL Type 4XImportant: Tighten screw after jumper removal.Phase to Ground MOV RemovalThree-PhaseAC InputR/L1S/L2T/L3Jumper1 2 3 4