Control Box Interior Components; Ef Bypass Switches - Hobart 120CU20 Operation And Maintenance Manual With Illustrated Parts List

OM-2228 / Operation and Maintenance Manual
120CU20 / Series 500120 / 400 Hz. Generator Set
b)

Control Box Interior Components.

1. Control Box Wrapper
2. Engine Specific PC Board [ESB] (A1)
3. Engine Interface PC Board [EIB] (A2)
4. Digital Control PC Board [CTL] (A3)
5. Voltage Regulator PC Board [REG] (A4)
6. Transformer-Rectifier PC Board [TRB] (A404)
{Optional}
(1) EF Bypass switches (located on CTL)
For each load contactor circuit, a single-pole, single-throw "EF1 BYPASS" for "OUTPUT 1" or
"EF2 BYPASS" for "OUTPUT 2" provides a means of bypassing the 28 VDC interlock circuit for
that contactor when supplying power to a load bank or to an aircraft not equipped with a plug
interlock system.
October 15, 2013
Figure 6: Control Box Interior Components.
7. +5, -12 VDC Power Supply (PS1)
8. Circuit Breaker Support Bracket
9. Marker Lights Circuit Breaker, 10 A (CB1)
10. Engine Circuit Breaker, 10 A (CB4)
11. Controls Circuit Breaker, 5 A (CB7)
Chapter 1-1
Page 16