SFWR GP-A6001 3927517 - Caterpillar

Description for Only the Three Wire System
Illustration 1 g01270179
(1) Zig Zag overload relay The K5 Zig Zag contactor (1) is mounted on the right panel. The K5 (1) is required for maintaining the ground reference for the three phase output. The ground reference is required when the system is in discharge mode and the system is disconnected from the utility input.The overload relay (1) is used with the internal resistor "R19" to provide a solid ground for the system.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 K5 contactor (1). Verify the labeling of the wires for subsequent installation.
Remove the rail stop on the right side of the contactor (1) by loosening the two screws. Slide the rail stop off the rail.
Remove the K5 contactor (1) by sliding the relay off the rail. Installation Procedure
Attach the K5 contactor (1) onto the rail by placing the top of relay on the top edge of the rail. Snap the bottom of the relay into place. Refer to Illustration 1 for placement.
Slide the rail stop over the rail and attach the rail stop. Fasten the rail stop in place with two screws.
Illustration 2 g01270235
Zig Zag contactor wire connections
Attach the wires to the K5 contactor (1). Verify that the labeling on the wires match with the location of the wires on the contactor. Refer to Illustration 2 for wire connections.