Technical data
33-144
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 A, Class 20, Auto/Manual Reset
Vol. 2, Ref. No. [0160]
Thermal Type A, Class 20,
Auto/Manual Reset
Type A Overload Relay
1-Pole Panel Mounting
Application Description
The Type A 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- or 3-phase applications.
Features
■ Field selectable manual/auto reset
■ Alarm contract factory available
■ Class 20 — 600V design
■ Inverse time delay trip
■ Adjustable trip rating ± 15%
■ Color coded reset rod:
❑ Compensated (Gray)
❑ Non-compensated (Red)
Operation
The Type A overload relay is a bimetal-
lic actuated device. The bimetal ele-
ments 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.
Automatic Reset
The Type A overload relay can be sup-
plied as an option on all A200 starters
to provide automatic reset operation.
The overload relay is always shipped
in the non-automatic mode. To set up
auto operation, reposition the reset
rod by loosening and re-tightening a
hold-down clamp at the base of over-
load relay.
Standards and Certifications
■ UL508
■ CSA
■ ANSI/NEMA ICS 2-222
Technical Data
Table 33-247. Control Contact Ratings
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 33-248. Product Selection — Thermal Type A Overload Relay Selection
Note: For Alarm Contact (Form C), add Suffix B. Available only as factory modification on
Type A relay. Adder
U.S. $ 54.00
1
3-Pole Type B Overload Relay is a suitable alternative to a 3-Pole Type A Overload Relay in
Manual Reset Mode. For example, BA13JP for AA13P, BN23J for AN23A, etc. (See Page 33-142.)
AC
Volts
Normally
Closed
Normally
Open
Make Break Make Break
Three-Pole Control Contact Ratings
24 – 120
120 – 600
20A
2400 VA
2A
240 VA
.5A
600 VA
.5A
60 VA
One-Pole Control Contact Ratings
24 – 120
120 – 600
30A
3600 VA
3A
360 VA
10A
1200 VA
1A
120 VA
Motor Full
Load Amps
Panel Mounted
Catalog Number
Starter Replacement
Catalog Number
Price
U.S. $
Ambient Comp. Non-comp. Ambient Comp. Non-comp.
Single-Pole (One NC Contact)
.25 – 26.2
26.3 – 45
19 – 90
19 – 135
AA11P
AA21P
AA31P
AA41P
AN11P
AN21P
AN31P
AN41P
AA11A
AA21A
AA31A
AA41A
AN11A
AN21A
AN31A
AN41A
45.25
64.50
85.00
135.00
Three-Pole (One NC Contact)
.25 – 26.2
26.3 – 45
19 – 90
19 – 135
AA13P
1
AA23P
1
AA33P
1
AA43P
1
AN13P
1
AN23P
1
AN33P
1
AN43P
1
AA13A
1
AA23A
1
AA33A
1
AA43A
1
AN13A
1
AN23A
1
AN33A
1
AN43A
1
88.00
128.00
169.00
268.00
Discount Symbol . . . . . . . . . . . . . . . . . . . . . . . 1CD1C
Tab3305.fm Page 144 Monday, October 23, 2000 10:19 PM