COVER 2N3598 - Caterpillar

Description
Illustration 1 g01275582
(1) Four wire Zig Zag circuit breaker location
Illustration 2 g01269813
(2) Three wire Zig Zag circuit breaker location The Zig Zag circuit breaker (CB2) is mounted on the floor above the large transformer in four wire installations. The CB2 is located on the lower right panel in three wire installations.4 Wire Removal Procedure
Refer to Systems Operation, Testing and Adjusting, UENR3954, "Internal Component Preremoval Steps (MMS System Cabinet)" in order to shut down the system and gain access to internal components.
Record settings for the breaker.
Disconnect the wires from the Zig Zag circuit breaker (1). Verify the labeling of the wires for subsequent installation.
Remove the screws that hold the breaker (1) to the transformer.
Remove the CB2 (1) from the cabinet. 3 Wire Removal Procedure
Refer to Systems Operation, Testing and Adjusting, UENR3954, "Internal Component Preremoval Steps (MMS System Cabinet)" in order to shut down the system and gain access to internal components.
Disconnect the wires from the CB2 (2). Verify the labeling of the wires for subsequent installation.
Remove the rail stop on the left side of the Zig Zag circuit breaker (2). Remove the rail stop by loosening the two screws and sliding the rail stop off the rail.
Remove the Zig Zag circuit breaker (2) by sliding the CB2 off the rail. 4 Wire Installation Procedure
Verify settings for the breaker.
Position the Zig Zag circuit breaker (1) in place on the transformer. Refer to Illustration 1 for placement.
Attach the breaker (1) to the transformer with screws.
Attach the wires to the Zig Zag circuit breaker (1). Verify the labeling of each wire with the location of the wire. 3 Wire Installation Procedure
Illustration 3 g01270004
Three wire Zig Zag circuit breaker wire connections
Attach the Zig Zag circuit breaker (2) onto the rail that is connected to the right panel. Place the top of the breaker (2) on the rail and then snap the bottom of the breaker (2) into place. Refer to Illustration 2 for placement.
Attach the rail stop. Slide the rail stop over the rail from the left side. Install the rail stop with two screws.
Attach the wires to the Zig Zag circuit breaker (2). Verify the labeling of each wire with the placement of each wire. Refer to Illustration 3 for wire connections.