Twomain coils are wound over stator core.Eachmaincoil outputs half theratedpower at the lower voltage (llOV or120V). These main coils are woundtobe in the samephase. The full power switch reconnects these main coils in parallel or in series.
Fig. 5-9 shows a circuit diagram-When the full power switch is set for single lower voltage indication (llOV or 120V), the switch position is as indicated by the lower solid line in the diagram. Fig. 5-10is a simplified representation of this circuit, showing the two maincoils connected in para1lel.h this case, the higher voltage (220V or 240V) at Rec. 3 cannot be taken out. Rec. 2 for the lowervoltage can output up to the rated power(up to 30A if the rated current is over 30A), and Rec. 1 can outputup to a total of 15A. When the full power switch is set for double voltage indication (llOV/220V or 120V/240V), the switch position is as indicated by the upper dotted line in Fig. 5-9.Fig. 5-11is a simplified representation of this circuit, showing the two main coils connected in series. In this case, power can be taken simultaneously from the receptacles for the both voltages. Rec. 3 for the higher voltage can output up to the rated power, but Rec. 1and Rec. 2 forthe lower voltage can output only up to half the rated powereach.
Table 5-4 isa summary of the above explanation. Select the proper output voltage byfull power switch in accordance with the appliance to be used.
5-34VOLTAGE CHANGEOVER SWITCH
The generator of50Hz llOV/220V dual voltage type for U.K. is providedwith voltage changeover switch insteadof full power switch.
The output voltage is selected from llOV and 220V by turning this switch and both voltages cannot be taken outsimultaneously.
VOLTAGE
CHANGEOVER
11ovSWITCH
NFB RECEPTACLE
J
Fig. 5-12
