Variable Transformer - TM-5-6115-423-150038

TM 5-6115-423-15

panel or door allowing access to the major

b. Removal and Installation. Refer to figure

17 to remove and install the variable trans-

component.

former.

72. Variable Transformer

a. On Equipment Test.

73. Auto Transformers

(1) Refer to figure 6 and 9.

(2) D e - e n e r g i z e load bank and connect

a. On Equipment Test.

(1) Refer to figure 5 and 18.

voltmeter to terminals # 1 and #4.

(2) De-energize load bank and connect

(3)

Energize load bank. Reading should

voltmeter to terminals H1 and X2.

be of 240 volts AC.

(3) Energize load bank with 240/416

(4)

D e - e n e r g i z e load bank and connect

volts AC.

v o l t m e t e r to terminals #3 and #4.

(4) Voltmeter should read 240 volts.

(5)

Energize load bank and turn the var-

(5) De-energize load bank and connect

iable control all the way counterclock-

voltmeter to X1--X2.

w i s e . The voltmeter should read 0.

(6) Re-energize load bank and voltmeter

volts. Turn the variable control gradu-

should read 120 volts AC.

ally clockwise until it is all the way

(7) If this reading is not obtained, re-

clockwise. The voltmeter

reading

place auto transformer.

should gradually increase to 240 volts

b. Removal and Installation. Refer to

AC.

(6)

figure 18 to remove and install the auto trans-

If these readings are not obtained, re-

,figure 17.

Variable transformer removal and indstallation.