WEG 2017 Motors Catalog

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Enclosed Motor Controls
Enclosed Motor
Controls
A-312 Data subject to change without notice.
Enclosed Starters
WEG’s full voltage non-reversing combination starters represent a competitive alternative to the traditional NEMA
starters by offering:
• Reduced overall dimensions, yet providing reasonable internal wiring space
• Rotary through-the-door disconnect instead of the traditional flange operator
• UL/CSA approved performance in more compact components.
Two series are available off the shelf:
• MCCB disconnect – ESWC Series
• Motor protector – ESWE & ESWF Series
Combination Starter Basics
Combination starters are the most common
type of packaged motor controllers. They are
called combination because of their construction
and combined functions required by the US
National Electric Code (NEC): Motor Disconnect,
Motor Branch Circuit Protection, Motor
Controller and Motor Overload Protection. UL &
CSA currently recognizes six different
constructions of combination starters that meet
the requirements of a motor branch circuit.
Constructions Types A through D are traditional
starters that use either a listed disconnect
switch and fuses or a listed circuit breaker as
the disconnect means and for short circuit
protection. Each type uses a separate UL508
listed motor controller and overload relay.
Recently revisions on UL508 introduced the
Type E and Type F starters.
Type E starter is a self-protected combination motor controller
that combines in a single device all the required functions of a
combination starter eliminating any additional requirements for
upstream fuses or circuit breaker. Type F starter consists of a
listed manual Type E combined with a UL508 listed contactor.
UL
Combination
Starter Type
Device Used for Component Function
Disconnected Branch Circuit
Protection Motor Controller Motor OL Relay
A
UL 98 Manual
Disconnect
UL 248 Fuses
UL 508 Magnetic
or Solid State
Controller
UL 508 Motor
Overload Relay
B
UL 508 Motor
Short Circuit
Protector
C UL 489 Inverse Time Circuit
Breaker
D UL 489 Instantaneous Trip
Circuit Breaker
E UL 508 Self-Protected Combination Controller
F UL 508 Manual Self-Protected
Combination Controller
UL 508 Magnetic
or Solid State
Controller
UL 508 Manual
Self-Protected
Combination
Controller
Enclosed Motor
Controls