Using the catalog selection chart shown in Illustration EL-0180, determine the correct catalog number for a motor starter that meets the selection criteria detailed as follows: NEMA, Open enclosure, 3-pole Rated, at 90 continuous amperes, Vertically mounted, Electronic overload relay-standard feature set, Non-reversing starter, Operating coil rated at 120 VAC/60 Hz
• Decode each character of the example catalog number using the EL-0180 chart, from left to right. • Match the requirements: NEMA standard, open enclosure, 3-pole, 90 A continuous, vertical mounting, electronic overload relay – standard feature set, non-reversing, 120 VAC/60 Hz coil. • Use the contactor frame size table and AC coil suffix table carefully to match amperage and coil voltage.
• Which letter in the catalog number corresponds to the Standard (NEMA vs IEC), and which letter shows the enclosure type? • Where on the chart is the overload relay type and C440 OLR designation shown, and which combination gives an electronic overload with the standard feature set? • After you select the correct NEMA size/continuous amperes and mounting option (vertical), which of the answer choices keeps all earlier characters consistent when you finally check the coil suffix (120 VAC/60 Hz)?
• Confirm that the character position for Device Assembly Configuration is set to 1 = Non-reversing. • Verify that the contactor frame size suffix you choose corresponds to 90 continuous amperes (NEMA Size 3) in the table. • Double‑check that the final coil suffix letter matches 120/60 or 110/50 Hz as specified in the AC coil suffix box.
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