The ornamental design for a fieldpowerselector, as shown and described.
FIG. 1 is a front perspective view of a first embodiment of the field power selector;
FIG. 2 is a back perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a back elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a front perspective view of a second embodiment of the field power selector; the back, right, left, and top views being identical to those shown in FIGS. 3-7.
FIG. 10 is a front elevation view thereof; and,
FIG. 11 is a bottom plan view thereof.
The broken lines shown in the figures are for the purpose of illustrating portions of the field power selector that form no part of the claimed design.