Technical data

33-4
For more information contact Cutler-Hammer at: www.ch.cutler-hammer.com/catalog CAT.201.01.T.E
January 2001
NEMA Contactors & Starters
33
Contactors — Non-reversing and Reversing
Freedom Line
Vol. 2, Ref. No. [0020]
Contents
Description Page
Product Family Overview
Product Description. . . . . . . 33-2
Application Description. . . . 33-2
Features . . . . . . . . . . . . . . . . 33-2
Standards and
Certifications . . . . . . . . . . .
33-3
Contactors — Non-reversing
and Reversing
Product Description. . . . . . . 33-4
Features . . . . . . . . . . . . . . . . 33-4
Technical Data . . . . . . . . . . . 33-4
Kits and Accessories . . . . . . 33-4
Product Selection —
3-Pole Contactors . . . . . . .
33-5
Product Selection —
2-, 4- and 5-Pole
Contactors . . . . . . . . . . . . .
33-6
Technical Data
. . . . . . . . . . . . . . 33-12
Accessories
. . . . . . . . . . . . . . . . 33-15
Auxiliary Contacts . . . . . . . . 33-19
DC Magnet Coils . . . . . . . . . 33-21
Mounting Plates. . . . . . . . . . 33-22
Special Modifications
. . . . . . . . 33-23
Renewal Parts
. . . . . . . . . . . . . 33-24
Dimensions
. . . . . . . . . . . . . . . . 33-26
Product Description
Non-reversing
Contactors are most commonly used
to switch motor loads in applications
where running overcurrent protection
is either not required or is provided
separately. Contactors consist of a
magnetically actuated switch which
can be remotely operated by a push-
button station or pilot device such as
a proximity switch, limit switch, float
switch, auxiliary contacts, etc.
Reversing
Reversing contactors are used prima-
rily for reversing single- or three-phase
motors in applications where running
overcurrent protection is either not
required or is provided separately.
They consist of two contactors
mechanically and electrically inter-
locked to prevent line shorts and
energization of both contactors
simultaneously.
Features
■
Designed specifically for use in
applications requiring NEMA rat-
ings. Contactors meet or exceed
NEMA standards ICS 2-1993.
■ Long life twin break, silver cadmium
oxide contacts — provide excellent
conductivity and superior resistance
to welding and arc erosion.
■
Designed to 3,000,000 electrical
operations at maximum hp ratings
up through 25 hp at 600V.
■
Steel mounting plate standard on all
open type contactors.
Non-reversing
■
Holding circuit contact(s) supplied
as standard:
❑
Sizes 00 – 3 have NO auxiliary
contact block mounted on right
hand side (on Size 00, contact
occupies 4th power pole position
— no increase in width).
❑
Sizes 4 – 5 have a NO contact
block mounted on left side.
❑
Sizes 6 – 7 have a 2NO/2NC
contact block on top left.
❑
Size 8 has a NO/NC contact block
on top left back and a NO contact
block on top right back.
Reversing
■
One NO-NC side mounted interlock
supplied as standard on each con-
tactor for Sizes 00 – 8.
Technical Data
Table 33-1. Wire (75°C) Sizes — AWG or
kcmil — Open and Enclosed
1
Two compartment box lug.
Table 33-2. Plugging and Jogging Service
Horsepower Ratings
2
2
Maximum horsepower where operation is
interrupted more than 5 times per minute or
more than 10 times in a 10 minute period.
NEMA standard ICS 2-1993 table 2-4-3.
Kits and Accessories
■
Auxiliary Contacts, contactor
mounted —
Pages 33-19 – 33-20 .
■
Transient Suppressor, for magnet
coil —
Pages 33-17 .
■
Timers — Solid-State and
Pneumatic, mount on contactor —
Page 33-16 .
NEMA Size 1 — Cat. No. CN15DN3AB
NEMA Size 1
Cat. No. CN55DN3AB
NEMA
Size
Power Terminals
Line or Load
Control
Terminals
Cu Only
00 12 – 16 stranded;
12 – 14 solid Cu
12 – 16
stranded
12 – 14
solid
0 8 – 16 stranded;
10 – 14 solid Cu
1 8 – 14 stranded or
solid Cu
2 3 – 14 (upper) and/or
6 – 14 (lower) stranded
or solid
1
Cu
3 1/0 – 14 Cu/Al
4 250 mcm – 6
5 750 kcmil – 2, or
(2) 250 kcmil – 3/0 Cu/Al
6 (2) 750 kcmil – 3/0 Cu/Al
7 (3) 750 kcmil – 3/0 Cu/Al
8 (4) 750 kcmil – 4/0 Cu/Al
NEMA
Size
200V 230V 460V 575V
00
0
1
2
3
4
5
6
—
1-1/2
3
7-1/2
15
25
60
125
1/2
1-1/2
3
10
20
30
75
150
1/2
2
5
15
30
60
150
300
1/2
2
5
15
30
60
150
300
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