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Wound Primary Transformers   Use for isolation and low  AC current situations when a measuring device requires 0/5  accurate Amp input and your source only produces from 1-40 Amps.   Wound Primary                     WP25   Similar to 20-2 1:5 to 25:5 195.00 WP25 20-2 30:5 205.00 WP150   Sim. To 20-4 1:5 to 25:5 210.00 WP150 20-4 30:5 220.00 WP150 20-4 40:5 to 50:5 230.00 WP200 Sim. To 81 1:5 to 25:5 370.00 WP200 Sim. To 81 30:5 380.00 WP200 Sim. To 81 40:5 to 50:5 390.00 WP300 Sim. To 200WP-1 1:5 to 25:5 470.00 WP300 Sim. To 200WP-1 30:5 480.00 WP300 Sim. To 200WP-1 40:5 to 50:5 490.00 WP500 Sim. To 200WP-2 1:5 to 25:5 550.00 WP500 Sim. To 200WP-2 30:5 560.00 WP500 Sim. To 200WP-2 40:5 to 50:5 570.00 WP750 No Equivalent 1:5 to 25:5 650.00 WP750 No Equivalent 30:5 660.00 WP750 No Equivalent 40:5 to 50:5 670.00