GAUGE (Feeler) 8H8581 - Caterpillar

Description
Illustration 1 g01277831
(1) T2 Transformer
(1) T1 Transformer T1 transformer (2) and T2 transformer (1) are multi-tap transformers that provide AC power to the power distribution PWA. Power for the T1 transformer is provided by the input of the UPS. Power for the T2 transformer is provided by the protected output of the UPS. The transformers are installed on the left panel of the cabinet. Refer to Illustration 1 for the locations of the transformer.T1 and T2 Flywheel Transformer Removal Procedure
Verify that the wire markings are correct. Verify that the wiring is correct for all transformer connections.
Disconnect all wires from the transformer terminals.
Remove the two top mounting nuts from the transformer mounting studs.
Tilt the transformer away from the panel to clear the mounting studs and lift the transformer up to clear the bottom mounting pockets. Thermistor Removal Procedure
Refer to Systems Operation, Testing and Adjusting, UENR3954, "Internal Component Preremoval Steps (Flywheel Cabinet)" in order to shut down the system and gain access to internal components.
Remove the two screws that attach the thermistor to the terminal block.
Remove each thermistor from the terminal block. Note: One screw is attached to the H1 terminal connector and one screw is attached to the COM or H2 terminal connector.Installation Procedure
Illustration 2 g01277850
T1 and T2 transformer wring
Place one lead of the thermistor into the H1 connector. Place one lead into the COM or H2 connector. Refer to Illustration 2.
Tighten the two screws in order to mount the thermistor.
Table 1
Specifications for the Transformer
Input (V) Output (V) Wire Gauge (AWG)
T1 380, 400, 415, 480 190, 230 10-22
T2 380, 400, 415, 480 190, 230 10-22
Table 2
Specifications for the Thermistor
Size Ohm
T1 32 mm 20
T2 32 mm 20