Technical data

March 2009
CA08102001E For more information visit: www.eaton.com
33-51
NEMA Contactors & Starters
33
IT. Manual and Combination Motor Controllers
IT. Manual and Combination Motor Controllers – NEMA Contactors
Contents
Description Page
IT. Manual and Combination Motor
Controllers – NEMA Contactor
Product Description . . . . . 33-51
Application Description . . . 33-51
Features . . . . . . . . . . . . . . . 33-51
Standards and
Certifications . . . . . . . . . . 33-52
Instructional Leaflets . . . . . 33-52
Catalog Number
Selection . . . . . . . . . . . . . 33-53
Product Selection . . . . . . . 33-54
Accessories . . . . . . . . . . . . 33-63
Dimensions . . . . . . . . . . . . 33-64
Product Description
The new Cutler-Hammer
®
Intelligent
Technologies (IT.) Open Non-reversing
and Reversing Manual Motor Control-
lers with NEMA Contactors from Eaton’s
electrical business combine a Manual
Motor Protector with a NEMA Contac-
tor(s) to provide a complete motor
protection solution by combining motor
disconnect function, thermal overload
protection, magnetic short circuit pro-
tection and remote control operation in
one compact, assembled unit. These
assembled Manual Motor Controllers
cover motors with FLA ratings from
0.22A to 25A.
The UL 508 Type F labeled Combina-
tion Motor Controller (CMC) includes a
Line Side Adapter (LSA) for NEMA
Size 00, Size 0 and Size 2. The Size 1
does not require an LSA. These
assembled Combination Motor
Controllers cover motors with FLA
ratings from 0.22A to 40A.
Application Description
The IT. NEMA Non-reversing and
Reversing Manual and Combination
Motor Controllers can be used in the
following applications:
■ Manual Motor Controller for Single
and Multi Motor Panels. The pre-
assembled IT. Manual Motor Con-
trollers (MMC) combine a Manual
Motor Protector, Wiring Connector
Link (NEMA Size 00 – 1 Non-reversing)
and NEMA Contactor. The A307,
A308 and A309 Manual Motor
Protectors are UL listed as UL 508,
Type E Self-Protected Manual Combi-
nation Starters. MMCs can also be
field installed with separate MMPs,
WCL and Contactor(s).
A NEMA
magnetic contactor has been added
to allow for remote operation of the
motor circuit.
■ Combination Motor Controller (UL
508, Type F), for Single and Multi
Motor Panels — The preassembled
Combination Motor Controllers
combine a Line Side Adapter,
Manual Motor Protector, Wiring
Connector Link (NEMA Size 00 – 1
Non-reversing) and NEMA Contactor.
The A307, A308 and A309 Manual
Motor Protectors are UL listed as UL
508, Type E Self-Protected Manual
Combination Starters. This UL list-
ing allows these devices to be used
in motor circuits without having to
add separate branch short circuit
protection. A NEMA magnetic
contactor has been added to
allow for remote operation of the
motor circuit.
■ Group Motor Installations — Since
the Manual Motor Protectors
(Manual Combination Starters)
are UL listed for Group Motor
Installations, the Manual Motor
Controllers provide a compact,
assembled package for Group
Motor Installations up to 600V.
For Group Installations (in-panel
SCPD) applying the traditional 1/3 tap
rule, the Manual Motor Protectors and
Manual Motor Controllers may be
used on 480V Delta systems along
with 480Y/277V and 600Y/347V slash
rated Wye systems. For Group Installa-
tions, applying the more recent 1/10
tap conductor rule, a maximum 240V
Delta is permitted or 480Y/277V and
600Y/347V slash rated Wye systems.
For actual UL 508 Type E/F applications
(out-of-panel upstream feeder SCPD
only), a maximum 240V Delta is per-
mitted or 480Y/277V and 600Y/347V
slash rated Wye systems.
For Manual “At Motor” Disconnect
applications, a maximum 240V Delta is
permitted or 480Y/277V and 600Y/347V
slash rated Wye systems.
Features
■ ON/OFF rotary handle with lockout
provision
■ Visible trip indication
■ Test trip function
■ Motor applications from 0.22A to
40A
■ Class 10 overload protection
■ Built-in heater and magnetic trip
elements to protect the motor
■ Phase loss sensitivity
■ Type 2 coordination
■ Ambient compensated up to 140°F
(60°C)
Table 33-71. Short Circuit Ratings — UL 508
Type E Manual Combination Starter/Motor
Controller

See Pages 34-295 and 34-296 for individual
ratings.
■
Control inputs located at bottom of
starter for easy access and wiring
■ 24V DC coils
■ DIN Rail or panel mount — (M)N307,
(M)N308 motor controllers
■ Mounting plates — (M)N357, N358,
N309 and N359 motor controllers
■ Adjustment dial for setting motor FLA
■ Short circuit trip at 13 times the
maximum setting of the FLA adjust-
ment dial
■ UL 508 Type F CMC High Fault Short
Circuit Ratings: Refer to Table 33-73
on Page 33-53.
■ Communications with the addition
of an IT. Overload Relay and SNAP
(Starter Network Adapter Product).
See Tab 50.
MN307 Open Non-reversing
Manual Motor Controller
Description Specification
A307

65 kA @ 240V, 480Y/277V
30 kA @ 600Y/347V up to 12.5A
A308

65 kA @ 240V, 480Y/277V
25 kA @ 600Y/347V
A309

65 kA @ 240V, 480Y/277V
30 kA @ 600Y/347V up to 75A