Sheet 38/77Products / Electrical and instrumentation / Electric motorRev
Electrical and instrumentation · catalogue item
Electric motor
Electric motor to drive pumps, fans, compressors and other process equipment.
In short
Electric motor to drive pumps, fans, compressors and other process equipment. JJ Projects sources it to the specification the buyer names. Typical reference, standards: NEMA MG 1; IEC 60034.
Specification references
Typical references only. The governing specification is the one on your purchase order or datasheet.
| Property | Typical reference |
|---|---|
| Standards | NEMA MG 1; IEC 60034 |
| Enclosure | As specified, including hazardous-area certified types |
| Data to give | Power, voltage, frequency, speed and frame size |
Specification references describe what the order names, not a certification held by JJ Projects.
Electrical and instrumentation
Typical uses
- 01Driving pumps, fans, compressors and blowers
- 02Conveyors, mixers and other process machinery
- 03Replacement of existing motors with a matching frame and mounting
- 04Hazardous areas, using motors certified for the area classification
What to include in a request
A request with these details can be quoted without a round of questions. Send what you have and we will ask for the rest.
- 01Power in kW or hp, voltage, phase and frequency
- 02Speed or number of poles, and the service factor or duty
- 03Frame size and standard, NEMA or IEC, and mounting arrangement, for example foot or flange
- 04Enclosure and cooling, for example TEFC or explosion-proof, and the area classification with its certificate
- 05Efficiency class required and insulation class
- 06Whether the motor runs on a variable frequency drive and needs inverter-duty construction
- 07Accessories such as space heaters or temperature detectors, and the documents required
Electrical and instrumentation
Related items
- 01Centrifugal pumpCentrifugal process pumps to API 610 and ASME B73.1, supplied to your datasheet, and what a request needs: fluid, flow, head, NPSH available and materials.Learn more
- 02Power and instrumentation cablePower, control and instrumentation cable on drums to NEC, UL or IEC as the project names, and what a cable request needs: conductors, voltage and length.Learn more
- 03Junction boxJunction boxes in carbon steel, stainless steel, aluminum or GRP with NEMA or ATEX/IECEx ratings, and what a request needs: size, entries, terminals and area.Learn more
All electrical and instrumentation
Guides
Guides
- 01How to write an RFQ for industrial materialsWhat an RFQ for industrial materials must specify: item, size, schedule or class, grade, standard, quantity, MTRs, inspection, packing and Incoterm.Learn more
- 02Industrial procurement process, step by stepHow industrial procurement works, step by step: requirement, RFQ, bid tabulation, evaluation, award, PO, expediting, inspection, logistics and delivery.Learn more
Questions
Questions
01What is the difference between NEMA and IEC motors?
NEMA frames are sized in inches and rated in horsepower under NEMA MG 1. IEC frames are sized in millimeters and rated in kilowatts under IEC 60034. Mounting dimensions differ, so one is not a drop-in replacement for the other without checking.
02How does speed relate to poles?
Synchronous speed is 120 times the frequency divided by the number of poles. A four-pole motor has a synchronous speed of 1800 rpm at 60 Hz and 1500 rpm at 50 Hz, and the shaft turns a little slower under load.
03What should I say if the motor runs on a drive?
State that it runs on a variable frequency drive, with the speed range. Motors on drives may need an insulation system, bearing protection or separate cooling that a standard motor does not have.
Send the specification. We will take it from there.
A material list, a drawing or a single line: tell us what the project needs and where it is going.