Digital Acoustics ESBx-110 Especificaciones descargar pdf (Pagina 336)

100

101

Maintenance and Troubleshooting

ADDvantage-32 PLUS ● AC to DC Power Converter

7-38

d. Connect the new fuse to the adjacent bus bars using the 1/2-13

screw and 1/2" Belleville springs. Tighten to 335-365 in-lb. Be

certain to orient the bus bars properly to each other now, before

attaching to the base.

e. Reattach the fuse to the base using the two 1/2-13 screws and

5/16" Belleville springs. Tighten to 120-140 in-lb.

f. Reattach the vertical bus bar removed in step a.

6. To replace any of the six SCRs CR1-6, perform the following steps in

order:

a. Remove the twisted pairs of wires from the gate leads of the

thyristor to be replaced.

NOTE

Each pair of wires is labeled with a single letter corresponding to a

letter silkscreened on the base.

b. Remove whatever bus bars are required to gain access to the

desired SCR.

c. Using a 5/32" Allen wrench, remove the mounting screws on each

corner of the thyristor and remove the thyristor.

d. Apply a layer of thermally conductive compound to bottom of new

thyristor and reinstall. Tighten the #10-24 socket head screws to

38-50 in-lb. Recheck torque after a minimum of 3 hours and apply

torque seal.

e. Replace the bus bars on the thyristor, using the metric hardware

provided with the semiconductor module. Tighten the terminal

screws to 70-90 in-lb.

f. Reattach the leads removed in step a, being certain to match the

letter designations.

7. The field thyristor (CR7) and field diode (CR8) are on the same panel as

CR1-6, near the bottom. They may be replaced by the following steps:

a. Remove the four terminal screws in the thyristor and diode that

old the two bus bars in place, allowing the bus bars to be lifted.

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Digital Acoustics ESBx-110 Especificaciones Pagina 336

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