UPS1000Z, UPS1200Z, UPS500G and UPS600G Uninterruptible Power Supplies Caterpillar

Description

Illustration 1	g01273727
Primary current transformer location (1) Primary current transformers

Illustration 2	g01273731
Secondary current transformer location (2) Secondary current transformers

Primary current transformers (1) are attached to the output of the system cabinet in order to measure the output voltage of the UPS. The primary current transformers (1) convert the current in a 1500:5 ratio. The converted current is sent to the secondary current transformers (2) on the left panel.

The three secondary current transformers (2) are located on the left panel. The secondary current transformers (2) convert the current in a 5:01 ratio. The converted current is sent to the AC Interface board.

Removal Procedure and Installation Procedure for the Primary Current Transformer

Note: Contact the technical communicator at your dealership for the removal procedure and the installation procedure of the primary current transformer (3).

Illustration 3	g03371240
(3) Installed primary current transformers

Illustration 4	g01273745
Wire connections for the primary current transformer

Removal Procedure for the Secondary Current Transformer

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.

Show/hide table

Illustration 5	g01273757
Wire connections for the secondary current transformer

1. Remove the four wires that are connected to the following posts of the current transformer (2):

   • H1

   • H2

   • X1

   • X2

   Ensure that the wires have a labeling that match the location of the wire. Refer to Illustration 5.

2. Remove the four screws that attach the current transformer (2) to the left panel.

3. Remove the current transformer (2) from the cabinet.

Installation Procedure for the Secondary Current Transformer

1. Position the current transformer (2) on the left panel. Refer to Illustration 2 for the position of the current transformer (2).

2. Attach the current transformer (2) to the left panel with four screws.

3. Attach the four wires to the four posts of the current transformer. Refer to Illustration 5 for wire connections.