59Charging circuitInstalling a switch fuse between the inverter module(s) and the DC link necessitatesa charging circuit. The charging circuit contains two resistors per inverter moduleand a switch fuse controller (type ASFC-01C). The resistors and the controller areincluded in the switch fuse kits.The minimum wire sizes to be used in the charging circuit are as follows:• DC bus to fuses: 2.5 mm 2 (AWG 14), double-insulated• ASFC to ground: 2.5 mm 2 (AWG 14)• From fuses/ASFC to charging resistors: 1.5 mm 2 (AWG 14)• Switch fuse auxiliary contact/solenoid wiring; auxiliary voltage supply to ASFC:0.75 mm 2 (AWG 18).The ASFC is also to be connected to the AINT board of the inverter module(s) by afibre optic link. See this chapter under Control connections.Motor connectionThe motor connection of frame R8i inverter modules is located at the back of themodule so that a quick connector can be used, enabling easy extraction of themodule from the cabinet for maintenance. The chassis socket – available separatelywith different mounting parts – is attached to the rear part of the cubicle (see theexamples in the chapter Cabinet construction). The picture below shows a cablingexample.Chassis socket withmounting plateGland plateOutput busbarsLower moduleguide
