Induction motor International and Indian Standards used in Designing
📘 Codes and Standards for Designing & Selection of Induction Motors
Induction
motors are rightly called the backbone of modern industry. From
manufacturing plants to process industries, they drive almost every critical
application. Since motors directly influence plant efficiency, safety, and
lifecycle cost, engineers must carefully evaluate them against recognized
international and Indian standards during design and procurement.
This
article lists the major codes and standards applicable to induction
motors, along with their scope.
🔹 International Standards for
Induction Motors (IEC/DIN/EN)
|
Standard |
Description |
|
IEC
60034-1, IEC 60085, DIN EN 60034-1 |
General
specifications for rotating electrical machines |
|
IEC
60034-2, DIN EN 60034-2 |
Specification
of losses & efficiency |
|
IEC/EN
61241, DIN EN 61241 |
Motors
in areas with flammable dust |
|
IEC/EN
60079-15, DIN EN 60079-15 |
Protection
type “n” (non-sparking) |
|
IEC/EN
60079-7, DIN EN 60079-7 |
Increased
safety “e” |
|
IEC/EN
60079-1, DIN EN 60079-1 |
Flameproof
/ explosion-proof enclosure “d” |
|
IEC/EN
60079-0 |
General
regulations for hazardous area motors |
|
IEC
60034-5, DIN EN 60034-5 |
Degrees
of protection (IP ratings) |
|
DIN ISO
10816 |
Vibration
limits |
|
IEC
60034-14 |
Vibration
severity |
|
IEC
60034-6 |
Cooling
methods |
|
IEC
60038 |
Standard
voltages |
|
IEC
60034-9 |
Noise
limits |
|
IEC
60034-11 |
Built-in
thermal protection |
|
IEC
60072 / DIN EN 50347 |
Standardized
dimensions and outputs |
|
IEC
60034-12 |
Restart
characteristics |
|
IEC
60034-8 |
Terminal
designations & rotation direction |
|
IEC
60034-7 |
Construction,
installation & terminal box position |
|
DIN
42925 |
Terminal
box entry design |
🔹 Indian Standards (IS) for
Induction Motors
|
Standard |
Scope |
|
IS 325 |
General
specification for three-phase induction motors |
|
IS 1231 |
Dimensions
of foot-mounted motors |
|
IS 1271 |
Classification
of insulation |
|
IS 2148 |
Flameproof
enclosures |
|
IS 2223 |
Flange-mounted
motor dimensions |
|
IS 2253 |
Types
of construction & mounting |
|
IS 2254 |
Dimensions
of vertical shaft motors for pumps |
|
IS 2968 |
Slide
rail dimensions |
|
IS 4029 |
Testing
guide for 3-phase motors |
|
IS 4691 |
Degree
of protection (IP) |
|
IS 4722 |
Rotating
electrical machines |
|
IS 4728 |
Terminal
marking & rotation direction |
|
IS 4889 |
Efficiency
determination method |
|
IS 5571 |
Selection
of equipment for hazardous areas |
|
IS 6362 |
Cooling
methods |
|
IS 8223 |
Frame
sizes 355 to 1080 – dimensions & outputs |
|
IS 9628 |
Motors
with type of protection “n” |
|
IS 8789 |
Standard
performance values |
|
IS 6381 |
Motors
with protection type "e" |
|
IS 7389 |
Pressurized
enclosures for hazardous areas |
|
IS 7816 |
Insulation
resistance testing |
|
IS 8289 |
Motors
with protection type “n” |
|
IS
12065 |
Noise
level limits |
|
IS
12075 |
Vibration
severity (shaft ≥56 mm) |
|
IS
12802 |
Temperature
rise limits |
|
IS
13529 |
Effects
of unbalanced voltages |
|
IS
13555 |
Motor
selection guide for driven equipment |
🏭 Why Standards Matter in Motor
Selection?
- Safety Compliance – Explosion-proof,
flameproof, and hazardous area requirements.
- Performance Assurance – Efficiency, vibration,
noise, and cooling standards.
- Interchangeability – Standardized dimensions
and mounting ensure easy replacement.
- Longevity & Reliability – Insulation, thermal
class, and derating factors.
- Energy Efficiency – Ensures compliance with
efficiency classes (IE2, IE3, IE4).
✅ Practical Tip for Engineers & Buyers:
Always cross-check both IEC/EN and IS standards in your project
specifications. For Indian projects, IS standards are mandatory, but
many OEMs also comply with IEC standards for global benchmarking.
⚠️ Disclaimer: This article is for educational purposes. Always
consult the latest version of IEC/IS standards and manufacturer’s datasheets
before finalizing motor selection.
Comments
Post a Comment