Operating Instructions; Contents Of This Chapter; Disconnecting The Brake Unit From The Drive Dc Bus; Connecting The Brake Unit To The Drive Dc Bus - ABB ACS880-607LC Hardware Manual

Operating instructions

Contents of this chapter

This chapter instructs in the basic operations of the brake unit with the DC switch/disconnector
(option +F286).

Disconnecting the brake unit from the drive DC bus

1. Stop all motors and inverter units that can regenerate energy back to the DC link. Keep
them stopped when the brake unit disconnected.
2. Open the DC switch/disconnector [Q11] of the brake unit.

Connecting the brake unit to the drive DC bus

If you connect voltage to the brake unit for the first time, obey the brake unit start-up
instructions.
If you connect voltage to the supply unit after the first start-up, obey these instructions:
1. To charge the brake unit capacitors, close the charging switch [Q10].
2. When the green light on the cabinet door illuminates, close the DC switch/disconnector
[Q11] of the brake unit.
3. Open the charging switch [Q10].
Operating instructions 61
8