ABB AKD-5 Installation Manual page 29

AKD-5, AKD-6 – Kirk Key Interlock
The EntelliGuard R retrofill circuit breakers provided as replacements for 3000A-4000A frame circuit breakers have a
trip interlock feature which will function using the legacy compartment mounted Key Interlock. A label is provided
with full instructions on how to operate the Legacy Key Interlock. It is suggested to apply the label on the inside of
the compartment door
To activate the key interlock:
1) OPEN the breaker.
2) Rotate the screw on the lower front panel of the cassette which normally allows access to the racking
screw. This will hold the breaker trip free.
3) While the screw is held rotated Clockwise, the Key Interlock slide in the switchgear is pushed inward,
elevating a pin on the left side of the breaker.
4) Turn the key to the key removal position, extending the bolt and lock the breaker in the OPEN position.
Secondary Disconnects, Bullets
The circuit breaker is already wired to the two EntelliGuard R 39 point secondary disconnects . The landing of the
wiring on the EntelliGuard R breaker cassette is done in the field. Up to 78 points are available so that all breaker
accessories can be wired to dedicated disconnect-points in the cubicle. Each breaker wire is identified with a unique
label depict the secondary disconnect assemblies for the AKD-5/6.
secondary disconnects. The cassette is a separate assembly from the retrofill breaker; first, the cassette is to be
wired and then installed in the switchgear, then followed by the breaker being racked into the cassette.
The wiring harness for the secondary disconnects, located on the AKD-5/6 retrofill cassette, has 21 wire connections
(grouped in three blocks (A, B, C)) for 75/100, with seven wire connections for each block). Each wire is clearly labeled,
or identified, with wire markers or tags. Each wire on the 21-wire harness is connected to a bullet. Each bullet, when
the cassette is racked in, engages with its respective points in the switchgear. The wires for Block A are identified as
A1, A2,...A7. Block B wiring is likewise labeled as B1, B2, B3,....B7. Block C contains C1, C2,....C7. The end, opposite of the
bullets, maps or connects to the retrofill EntelliGuard R Cassette
78-point, secondary-disconnect. For example, if bullets A1 and A4 are reserved for the motor, they connect to points
A1 and A2 on the cassette's 78-point, secondary-disconnect for a motor. Each Cassette secondary wire needs to be
landed in the field based on the specifics breakers wiring diagram and modifications made in the field.
Figure 25 is a photo of the AKD-5/6 harness.
Figure 25. AKD-5/6 Harness, Top View of Cassette
27 EntelliGuard R Circuit Breaker Retrofill AKD-5/6 Installation Manual
(Figure 17). Following is a brief summary of how the Key Interlock system is operated.
Figure 25 shows three 7 pt. blocks of legacy type
DEH0005240 R01