Technical data
CA08102001E For more information visit: www.eaton.com
33-179
NEMA Contactors & Starters
March 2009
33
A200
Relays — Thermal and Fast Trip, Type FT Fast Trip
Type FT Fast Trip, Class 10
Application Description
The Type FT overload relay is designed
to protect special purpose motors hav-
ing restricted thermal and locked rotor
capabilities. Using modern block type,
bimetallic design, this relay will pro-
vide Class 10 operation in single- or
three-phase applications.
Operation
The Type FT overload relay is a bime-
tallic actuated device. The bimetal ele-
ments are operated directly from line
current, thus separate calibrating
heater elements are not utilized. The
overload relay may be wired directly in
the motor circuit, or through-current
transformers on applications larger
than 150A.
As the bimetals are heated by motor
current flow, a deflection force is pro-
duced. Upon a sustained level of
abnormal current flow, the deflection
becomes great enough to open the
snap action output contact.
Product Selection
Table 33-280. Type FT Single-Pole (One NC Contact); Three-Phase (Three NC Contacts in Series)
Note: Single-Pole (1NO-NC Contact): Add Suffix B.
Three-Pole (3NO-NC Contacts): Add Suffix B. Example: FT13PB-12.
Motor Full Load
Amperes
Panel Mounted Starter Replacement
Single-Pole Three-Pole NEMA
Size
Single-Pole
Catalog
Number
Price
U.S. $
Catalog
Number
Price
U.S. $
Catalog
Number
Price
U.S. $
.76 – 1.1
1.1 – 1.6
1.6 – 2.4
2.4 – 3.6
3.6 – 5.4
5.4 – 8.0
8.0 – 12
FT11P-1.1
FT11P-1.6
FT11P-2.4
FT11P-3.6
FT11P-5.4
FT11P-8.0
FT11P-12
FT13P-1.1
FT13P-1.6
FT13P-2.4
FT13P-3.6
FT13P-5.4
FT13P-8
FT13P-12
—
—
0, 1
0, 1
0, 1
0, 1
0, 1
FT11A-1.1
FT11A-1.6
FT11A-2.4
FT11A-3.6
FT11A-5.4
FT11A-8
FT11A-12
12 – 18
16 – 24
22 – 32
24 – 36
36 – 54
FT11P-18
—
FT11P-32
FT21P-36
FT21P-54
FT13P-18
FT13P-24
FT13P-32
FT23P-36
FT23P-54
1
0, 1
2
2
FT11A-18
—
FT11A-32
FT21A-36
FT21A-54
22 – 32
32 – 48
48 – 72
72 – 110
100 – 150
FT31P-32
FT31P-48
FT31P-72
FT41P-110
FT41P-150
FT33P-32
FT33P-48
FT33P-72
FT43P-110
FT43P-150
3
3
3
4
4
FT31A-32
FT31A-48
FT31A-72
FT41A-110
FT41A-150
Features
■ Class 10 — 600V design
■ Inverse time delay trip
■ Color coded reset rod — green
■ Alarm contact factory available
■ Field selectable manual/auto reset
■ Adjustable trip rating ±20%
■ Ambient compensation included
Technical Data
Table 33-281. Control Contact Ratings
AC
Volts
Normally
Closed
Normally
Open
Make Break Make Break
24 – 120
120 – 600
30A
3600 VA
3A
360 VA
10A
1200 VA
1A
120 VA
Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . 1CD1C