(C) Instrument Light - Hobart 60PL20 Operation And Maintenance Manual

OM-2053
(a) Sensing modules
The voltage sensing module (4) and frequency sensing module (6) are connected to gener-
ator output leads between the generator and load contactor. These solid-state modules sense
any abnormal condition of voltage or frequency and signal the solid-state circuitry of the mem-
ory and time delay module (7) to open the load contactor and disconnect output to the air-
craft. A solid-state overload signaling device (5) is also connected to the protective monitor
module and performs a function similar to the voltage and frequency sensing modules.
1. Instrument panel light
2. Frequency meter
3. Voltmeter
4. AC ammeter
5. Meter selector rotary switch
6. Instruction plate
7. Line selector toggle switch
8. Protective system fuse (2-A)
9. Load contactor circuit fuse (2-A)
10. Overvoltage indicating light
1-1
Page 10
Front Panel of Generator Control Box
Figure 6
11. Undervoltage indicating light
12. Overfrequency indicating light
13. Underfrequency indicating light
14. Overload indicating light
15. Hole plug
16. Light test switch
17. Reset switch
18. Regulated/diagnostic switch
19. Aircraft/test-bank switch
December 31/91 Revised