ABB REX 521 - Introduction to the REX 521 Protection Relay

8 Cutting Tool Operating Guide
The punch assembled to its place.
2. Install the punch (3) to the feed rod (2). Notice the
position of the REX 521 marking on the punch.
3. Install the two coil springs (5) to their slots in the
punch (3).
4. Install the die (6) to the feed rod (2). Ensure the
correct die position with the marking in the die.
Check that the coil springs (5) go to their slots in
die.