Electric Motor Control Basics - Book - Page 49
The Benefits of Type E/F Motor Protection Circuit Breakershe
The Type E manual, self-protected combination motor controller was tested with
a Series 300 Contactor creating a Series 630 Direct-On-Line Starter, providing the
customer with the option to take advantage of the contactor’s extended switching life,
while simultaneously achieving the required motor disconnect capability and short
circuit/overload protection.
Industrial Control
Basics:
Part 1, Contactors
Type F construction is very similar to Type E with the following exceptions:
Industrial Control
Basics: Part 3,
Starters
Type E vs. Type F
Type E
Type F
The entire assembly is self-protected.
Same combination kA ratings as Type E.
There is a separate set of short circuit and endurance
performance tests just for Type E self-protected
category.
Only the manual motor starter is
self-protected.
The entire assembly is subjected to the Type E short
circuit and endurance performance tests.
The contactor is not subjected to the Type E short circuit
and endurance performance tests.
Since the contactor is not part of the self-protected test, the Type F combination motor
controller will clear a short and protect equipment and operators, but the device may
not be operational immediately after a fault occurs.
Industrial Control
Basics: Part 2,
Overload Relays
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
49
