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SR Industrial Motors Selection Guide
This chart contains a selection of five popular sizes of variable speed SR motor systems. The torque values listed in the chart are continuous ratings at a nominal 1800 RPM, for your severe duty applications at other speed ratings, please contact your dealer or LTI Power Systems.
| System Model |
Motor Model |
Converter Model |
kW |
HP |
RPM |
Torque * |
Braking |
3Ø Input |
Weight |
Frame |
Enclosure |
Insulation |
Duty |
Cooling |
Mounting |
| SR 200 |
SRM200TI |
SRC3050W |
45 |
60 |
0-8000 |
239Nm
176 ft lb |
No |
460 VAC, 60HZ |
230 kg |
IEC200L |
IP54 |
Class F |
S8 |
IC41 |
Base or Flange |
| SR 250 |
SRM250TI |
SRC3075W |
75 |
100 |
0-8000 |
398Nm
294 ft lb |
No |
460 VAC, 60HZ |
440 kg |
IEC250M |
IP54 |
Class F |
S8 |
IC41 |
Base or Flange |
| SR 280 |
SRM280TI |
SRC3100M |
110 |
150 |
0-8000 |
584Nm
431 ft lb |
No |
460 VAC, 60HZ |
580 kg |
IEC280M |
IP54 |
Class F |
S8 |
IC41 |
Base or Flange |
| SR 315 |
SRM315TI |
SRC3100M + SRC3100S |
200 |
260 |
0-6000 |
1061Nm
783 ft lb |
No |
460 VAC, 60HZ |
1220 kg |
IEC315M |
IP54 |
Class F |
S8 |
IC41 |
Base or Flange |
| SR 355 |
SRM355TI |
SRC3100M + 2xSRC3100S |
275 |
370 |
0-5000 |
1460Nm
1078 ft lb |
No |
460 VAC, 60HZ |
1700 kg |
IEC355M |
IP54 |
Class F |
S8 |
IC41 |
Base or Flange |
| * Please note: Nominal ratings at 1800 RPM. |
| Construction Features |
| Frame Size |
All |
| Frame Material |
Cast Iron |
| End Shield Material |
Cast Iron |
| Conduit Box Material |
Cast Iron |
| Lead Identification per IEC 34-8 |
Yes |
| Gasket to Frame |
Neoprene |
| Conduit Box Cover Gasket |
Neoprene |
| Terminal Block |
Yes |
| Ground in Conduit Box (Labeled "PE") |
Yes |
| Lead Entry Metric Threading |
Yes |
| Number of Lead Openings |
2 |
| Conduit Box Hardware - Metric |
Yes |
| Fan Material (1) |
Plastic |
| Fan Cover Material |
Sheet Metal |
| Shaft Material |
Carbon Steel |
| Rotor Material |
Laminated Iron |
| Rotor Winding Material |
None |
| Stator Winding Material |
Copper |
| Nameplate Material |
Stainless Steel |
| External Frame Ground |
Yes |
| Bearings (2) |
Ball |
| Type |
Open - PLS |
| Grease Inlet |
Fittings |
| Grease Outlet |
Auto & Drain |
| Protection to Inner |
C.I. Inner Cap |
| Provision for Draining |
T-Drain S.S. |
| Eyebolt for Lifting |
Yes |
| Neoprene Shaft Slinger |
Yes |
| RTV on Frame Fits |
Yes |
| Lead Connections |
3 Pairs |
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