Electric Motor Control Basics - Book - Page 76
NEMA vs IEC Motor Controls
For example, an HP-rated IEC device may be substantially smaller than a similar one
from NEMA.
This is one significant advantage for OEM designers. Besides, IEC products are less
expensive.
2. Features and Benefits
The design of NEMA products gives them the advantage of the ease of selection. The
most essential features to know when choosing a NEMA product are voltage and
horsepower.
Most importantly, it’s essential to check the serviceability of devices in the NEMA
market. Most of the products are easy to service as they provide access to internal
parts. Apart from cases where total replacement is required; coils and contacts can be
repaired with the device still on the panel.
Another consideration in the features is reserve capacity. Most of NEMA products
are robust and broadly applicable. They’re also more general purpose than their IEC
counterparts.
NEMA devices have interchangeable heater elements, with a range of units available
for the overload. This is a characteristic that makes NEMA products more desirable on
most construction jobs.
The Enclosed Package Solution or Motor Control Center is a well-known NEMA
tradition. Most products are sold as starters, either in open-style or enclosed versions.
Industrial Control
Basics:
Part 1, Contactors
Industrial Control
Basics: Part 2,
Overload Relays
Industrial Control
Basics: Part 3,
Starters
The Benefits of Type E/F
Motor Protection
Circuit Breakers
Basic Pump Control:
Three Phase DOL Starter
Control of an Electric Pump
Applying Motor Control
in a Wastewater
Application
NEMA vs IEC Motor
Controls
Understanding
IP Ratings
76
