ABB ACS880-87LC-4000A/4021A-7, Hardware Manual

Page: 16 / 144

16 Safety instructions

Opening and disconnecting the main circuit breaker
These instructions are for the qualified electricians who do work on the converter,
generator cable or generator.
WARNING! If you are not a qualified electrician, do not proceed or do any
installation or maintenance work.
1. Undo the two fastening screws of the main circuit breaker (Q1) cover.
2. Open the cover and put the key into its place.
3. To access the crank, turn the lower key and
4. press down the button next to the lower key.
5. Pull out the crank.
6. Insert the crank into the hole next to the lower key and turn the crank until it stops.
7. Make sure that the rotating switch to the right of the crank is in the DISCONNECTED
position.
8. Lock the Push OFF switch to the Push OFF position with the key on the right. Put the
key(s) in a safe place. Make sure that the OPEN/CLOSED indicator shows OPEN.
9. Write your name, phone number and the date to the “Do not switch on. Men at work”
warning sign and hang the warning sign on the main circuit breaker.