(660) 376-9700

sem@gwm4-3phase.com

Smith Electric Motorworks

High quality 3-phase power converters since 1986

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Special Converters w/Automatic Controls

This converter operates equipment with fixed or variable (multi-motor) loads that may start without warning and requires no control modifications or phase balancing of load motors

special converters diagram

This converter is used for equipment that may operate unattended, such as heat and A/C, refrigeration, water wells, irrigation, sewage lift stations, elevators and similar applications. No equipment control changes or modifications are required. Additional motors such as fans, aerator pumps, etc. may be operated with or without the main load operating and no phase balancing is required on any load motors.

A disconnect means is NOT furnished–consult GWM if Main Rotary Magnetic Starter is desired. The converter first attains operating speed, then the 3-phase output contactor is energized. This output is controlled from the load side of the rotary fuse, providing phase-loss protection. Following any power outage the converter will restart itself and operate equipment automatically.

The converter runs continually, and on average will operate for about a dollar a day. The GWM rotary can operate on a 24-hour basis, even unloaded, without overheating because of our exclusive low resistance rotor design. Lifetime Warranty against Rotor Failure.

Chart sizing allows for operation of EPACT (High Efficiency) Motors manufactured after Nov. 1, 1997
Load Motor(s) Operated, Specify Category
Rotary
Frame
Model
SP — TE		Category CT
Pumps-Centrifugal
Vertical Turbine *
1@HP — 2@HP		Category RF
Refrigeration, A/C,
Heat Pump, Compressors
1@RLA/HP — 2@RLA/HP		Category DS
Deep-Well Submersible
Pumps
1@HP — 2@HP		Cat. LS
Sewage-Lift
Submersible / Grinder **		Category EV
Passenger Elevator B
Hydraulic—Mechanical A
EV1 — EV2
1843 — 1.57.5/2 — 4.5/1.52 — 1≤1.53
2155 — 314.6/5 — 9.6/35 — 337.5
25410 — 7.520/7.5 — 14.6/57.5 — 5510
25615 — 1029/10 — 20/7.510 — 7.57.515
28620§ — 15§40/15 — 29/1012 — 101020
32425 — 20§52/20 — 40/1515 — X1525
32630§ — 25§65/25 — 52/2020 — X2040
36440§ — 30§78/30 — 65/2525 — X30§50
36550§ — 40§98/40 — 78/3040 — X
40§60
*Will also operate a center pivot sprinkler at once with the pump. **Please note that alternating duplex lift stations may operate both motors simultaneously if heavily used. Will start both pumps at once if required. For simplex (single pump) lift stations use one size smaller converter §Requires an additional capacitor module (Kilogen) for each motor. To avoid the Kilogen requirement, use one size larger rotary than unit listed. A For Across-the-line-start motor only. Includes a special Start/Run Assist Panel. For slip-ring or variable-speed motor drives, call GWM. B Some passenger elevators (Otis, etc.) use a 3-phase servo control that is low amperage but voltage sensitive—we add a special, miniature DIGI-Series rotary converter for this control.