Leeson (Regal Rexnord)

WattSaver / E-Plus 3

Recip and small screw compressors; drop-in EISA replacement.

Nameplate

Phase: 3-Phase
HP range: 1 – 250 HP
Voltage codes: 208-230/460 V · 460 V
NEMA frames: 143T – 449T
Enclosure: TEFC (rolled steel or cast iron)
Poles / RPM: 2, 4, 6
Efficiency: NEMA Premium
Insulation class: F
Service factor: 1.15

Lead connection diagrams

9-lead Wye (High voltage · 460 V)

L1 ─┬─ T1 ── T7
L2 ─┬─ T2 ── T8
L3 ─┬─ T3 ── T9
     T4 ─┐
     T5 ─┼── tied together (neutral point)
     T6 ─┘

Tie T4-T5-T6 together and insulate. Feed line to T1/T2/T3; jumper T7-T1, T8-T2, T9-T3.

9-lead Delta (Low voltage · 230 V)

L1 ─┬─ T1 ── T6 ── T7
L2 ─┬─ T2 ── T4 ── T8
L3 ─┬─ T3 ── T5 ── T9

Parallel pairs: T1-T6-T7, T2-T4-T8, T3-T5-T9. No neutral tie.

Schematics & manuals

Leeson three-phase connection diagrams

Links point to the manufacturer's own PDF hosting. If a link 404s, search the model number on the manufacturer's Download Center — filenames change with revision.

The connection charts above are the NEMA MG-1 industry-standard patterns most brands follow. Always confirm the exact chart printed inside your motor's peckerhead lid before landing leads — voltage-code and lead-tag conventions vary between OEMs and production years.

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