Motor data & wiring
Voltage codes, frames, efficiency ratings, and 9-lead wye/delta connection charts for the motor brands you actually see on rotary-screw and reciprocating compressor packages. Always cross-check the physical nameplate before sizing overloads or landing leads.
Guided diagnostic
Motor won't start, hums, or trips?
Answer a few questions → likely causes and the next tests to run.
17 motor series
- 3ΦBaldor-RelianceSuper-E PremiumScrew and reciprocating compressors, general industrial.1 – 800 HP208-230/460 V460 VPremiumTEFC
- 3ΦBaldor-RelianceIEEE 841 Severe DutyRotary-screw compressor duty in dusty/oily plants.1 – 500 HP230/460 V460 VPremiumTEFC
- 1ΦBaldor-RelianceFarm Duty / Industrial 1φSmall recip compressors, 5 HP two-stage tank units.1/3 – 15 HP115/230 V230 VStandard effic…ODP
- 3ΦU.S. Motors (Nidec)TITAN Premium EfficiencyGeneral industrial, rotary-screw compressor OEM fit.1 – 400 HP208-230/460 V460 VPremiumTEFC
- 3ΦU.S. Motors (Nidec)Corro-Duty (Severe Duty)Chemical, paper, and outdoor compressor packages.1 – 300 HP230/460 V460 VPremiumTEFC
- 3ΦWEGW22 (NEMA Premium)Screw compressors, pumps, fans; common OEM replacement.1 – 800 HP208-230/460 V460 VPremiumTEFC
- 1ΦWEGW22 Single-PhaseSmall tank-mounted recip compressors.1/4 – 15 HP115/230 V230 VStandardODP
- 3ΦSiemensSIMOTICS GP (General Purpose)Screw compressors, VFD-fed pumps and fans.1 – 500 HP208-230/460 V460 VPremiumTEFC
- 3ΦABBM3BP Cast-Iron (Process Performance)Rotary-screw and centrifugal compressors globally.1 – 900 HP230/460 V460 VIE4TEFC
- 3ΦMarathon (Regal Rexnord)BlackMax Inverter DutyVSD screw compressor packages, inverter-driven fans.1 – 500 HP230/460 V460 VPremiumTEFC
- 1ΦMarathon (Regal Rexnord)microMAX / General Purpose 1φHomeowner and prosumer tank-mount compressors.1/6 – 10 HP115/230 V230 VStandardODP
- 3ΦLeeson (Regal Rexnord)WattSaver / E-Plus 3Recip and small screw compressors; drop-in EISA replacement.1 – 250 HP208-230/460 V460 VPremiumTEFC
- 3ΦTECO-WestinghouseMAX-E2 / MAX-E3OEM screw compressors, general industrial.1 – 500 HP230/460 V460 VPremiumTEFC
- 3ΦToshibaEQP-Global / EKM3 PremiumCompressors, pumps, fans; IEEE 841 variant available.1 – 800 HP230/460 V460 VPremiumTEFC
- 3ΦGE (now ABB/Wolong)X$D Ultra IEEE 841Legacy industrial compressor plants.1 – 500 HP230/460 V460 VPremiumTEFC
- 1ΦCentury (Regal Rexnord, ex-A.O. Smith)Century Compressor Duty 1φBig-box store tank-mount replacement motors.1 – 7.5 HP (advertised 'SPL' ratings vary)115/230 V230 VStandardODP
- 3ΦLincoln Motors (Regal Rexnord)Ultimate E (compressor duty)Rotary-screw compressor OEM (common on Sullair packages).5 – 300 HP230/460 V460 VPremiumTEFC
Need to compute amps or overload trip? Jump to the motor amperage calculator or the motor repair field guide.