Hobart 120CU20, Operation And Maintenance Manual With Illustrated Parts List

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OM-2228 / Operation and Maintenance Manual
120CU20 / Series 500120 / 400 Hz. Generator Set
October 15, 2013 Chapter 1-2
Page 3
To install AC output cables proceed as follows:
(1) Open control box door of the generator set and remove the lower panel.
(2) Remove Plexiglas cover in front of the power module assembly.
(3) Remove the cover panel on the cable tray covering the cable clamps.
(4) Loosen screws on cable clamps.
(5) Route cables through cable clamps, and up to the load side of the load contactor(s).
(6) Connect the phase cable terminal lugs to the appropriate terminal studs on the contactor(s): cable
lug “A” to terminal stud “A”, “B” to “B”, and “C” to “C”.
(7) Connect the cable’s neutral terminal lug securely to the neutral (ground) stud on the power
module assembly.
(8) Connect the “E” and “F” cables to the “E” and “F” studs on the power module assembly.
(9) Tighten clamp screws securely, but avoid damage to cable insulation.
(10) Replace Plexiglas cover panel, lower panel, and close canopy door.
c) Installing the DC Output Cable (optional).
(1) The T-R output cable is not normally supplied unless specifically ordered. For normal aircraft
service, use cable assembly, MS90347, with 4/O size cables having a positive and negative
connection.
(2) The output cable is extended through the canopy via the supplied hole and bracket in the frame
assembly (See Figure 3).
(3) The cables will be connected to the output contactor, located under the TR assembly on the right
side (See Figure 4).