Figure 24
Racking in AKD6 AKR 30/50—Retrofill
Figure 25
Stationary Secondary Contacts
17. While turning the screwdriver to the right with the racking tool shutter open, insert the
racking tool in the handle-insertion hole, so that it engages the racking mechanism
inside the hole.
18. Line up the racking tool or crank with the handle straight up so that you can get some
good leverage or torque. Then, crank clockwise so that the retrofill starts to move in,
slowly sliding forward into the compartment. Push the breaker in slightly to engage
racking cams, if torque seems high at the start.
19. Rotating clockwise ~37 turns racks the circuit breaker all the way into the enclosure.
20. As the breaker approaches the TEST position, check the alignment of the fixed and
moving parts of the secondary disconnect contacts (fig. 25). If a motor spring-charge
or under-voltage
-
release is installed, these devices might activate when approaching
the TEST position. The AKD-6 7 pt Secondary Disconnect Blocks will have full conductive
copper/ Ag plated strips including the ramp that depresses the Secondary Bullets on
the breaker. In case Emax2 Retrofill breakers Secondary Bullets touch those in the
DISConnect Position and if this must be isolated; then the old Secondary Disconnect
Blocks would need to be replaced with the new ones that have the front ramp done
with plastic of the housing as shown in Figs. 25b & c.
21. Continue rotating the racking handle clockwise until the position indicator first shows
TEST, and then finally shows CONNECTED.
22. When approaching the CONNECTED position, more torque for turning the racking
handle is normal as the primary finger clusters engage with AKD6 primary bus stabs.
23. Keep cranking as required, that is, when any further torquing can't be done.
24. At 37 clockwise rotations, the fingers at the back of the circuit breaker should be
completely engaged with the primary bust stabs.
25. Remove and store the racking handle in its storage location.
Fig. 25a
Fig. 25b
Fig. 25c
28 ©2022 Emax 2 Retrofill Circuit Breakers 800A-4000A
2TSA451014P0000 Rev-B
