Technical data

33-142
For more information contact Cutler-Hammer at: www.ch.cutler-hammer.com/catalog CAT.201.01.T.E
January 2001
NEMA Contactors & Starters
33
Thermal and Fast Trip Overload Relays
A200 Line — Thermal Type B, Class 20, Manual Reset
Vol. 2, Ref. No. [0158]
Thermal Type B, Class 20,
Manual Reset
Type B Overload Relay
Panel Mounting
Application Description
The Type B overload relay is designed
to protect industrial motors against
overload conditions. Using modern
block type, bimetallic design, this relay
will provide Class 20 operation in either
single-phase or 3-phase applications.
Features
■ Ambient compensation standard
■ Alarm contact field mountable
■ Class 20 — 600V design
■ Inverse time delay trip
■ Test trip device for weld check
■ Hi-visibility up-front trip indication
■ Trip-free reset mechanism
Operation
The Type B overload relay is a bimetal-
lic actuated device. The bimetal
elements are operated by precisely
calibrated heaters. The heater ele-
ments are connected either directly in
the circuit to be measured, or through
current transformers on applications
NEMA Size 5 and larger.
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.
Ambient Compensation
The Type B ambient compensated
design is supplied as standard on all
A200 starters. This design uses a sec-
ond compensating bimetal responsive
to ambient air temperature in the sur-
rounding enclosure. This feature
reduces nuisance tripping in applica-
tions using compact control panels
and motor control centers where inter-
nal temperature rise is significant com-
pared to motor ambient temperature.
The compensating characteristic is
maintained in ambient temperatures
from 40° to 77°C.
Standards and Certifications
■ UL508
■ CSA
■ ANSI/NEMA ICS 2-222
Technical Data
Table 33-243. Control Contact Ratings —
NEMA B600 NO and NC Control Contact
Rating
Accessories
Table 33-244. Alarm Contact Kit Selection
1
1
Alarm contact available as factory modifica-
tion of field mountable. For factory modifica-
tion, add suffix B.
Product Selection
Heaters
Enter heaters as separate item by listing Catalog Number from tables,
Pages 33-148 – 33-149, as required per starter.
Relays
Table 33-245. Product Selection — Thermal Type B Overload Relay Selection
2
Includes contactor mounting bracket, overload relay and connection straps to contactor.
3
For replacement on B200 size 00, 0, 1 use BA23A instead of BA13A and use BN23A instead of
BN13A.
AC Volts Make Break
24 – 120
120 – 600
30A
3600 VA
3A
360 VA
Type B
Overload
Relay Size
Catalog
Number
Price
U.S. $
1, 2
3, 4
B3NO-2
B3NO-4
21.40
21.40
Motor Full
Load Amps
Panel Mounted Starter Mounted Catalog Numbers Price
U.S. $
Catalog Numbers Replacement for
Type B Overload
Relays
Replacement for Type
A Overload Relays in
Manual Reset Mode
(3-Pole Only)
2
Ambient
Comp.
Non
comp.
Ambient
Comp.
Non-
comp.
Ambient
Comp.
Non-
comp.
Single-Pole (One NC Contact)
.25 – 26.2
26.3 – 45
BA11JP
BA21JP
BN11JP
BN21JP
BA11A
BA21A
BN11A
BN21A
—
—
—
—
32.25
46.25
19 – 90
19 – 135
Use 3-Pole Design, Wire 3 Poles in Series
Three-Pole (One NC Contact)
.25 – 26.2
26.3 – 45
19 – 90
19 – 135
BA13JP
BA23JP
BA33P
BA43P
BN13JP
BN23JP
BN33P
BN43P
BA13A
3
BA23A
BA33A
BA43A
BN13A
3
BN23A
BN33A
BN43A
BA13J
BA23J
BA33A
BA43A
BN13J
BN23J
BN33A
BN43A
64.50
92.50
123.00
193.00
Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . 1CD1C
Tab3305.fm Page 142 Monday, October 23, 2000 10:19 PM