Eaton AA13P Manual

Size 1 or 2 Type A Thermal Overload
Relay, 3 Pole, Ambient Compensated
or Non-Compensated
The relay
The Type A thermal overload relay (OLR) is a
bimetallic device which, with the properly selected
wire and heaters, will provide motor protection
for running and stalled rotor overloads in motor
circuits not exceeding 600 volts. The Size 1 and 2
OLR’s have a maximum current rating of 26.2 and
45.0 amperes respectively. Ambient compensated
OLR’s are readily distinguishable by light gray reset
rods. Non-ambient compensated OLR’s have red
reset rods.
Operation
The strip bimetals in the OLR are indirectly heated
by the replaceable heater elements (Item 4 in
Figure 1) which carry the motor current. Excess
heat is generated in these heater elements by an
overloaded motor. The heated bimetals deflect to
open the normally closed (NC) contact, thereby
opening the coil circuit of a magnetic contactor
which disconnects the overloaded motor from the
line. After approximately 2 minutes, the relay (if
hand reset) may be reset by pressing the reset
rod. For relays in the auto position, resetting
occurs automatically.
Installation
The OLR must be installed on a vertical surface
with the control terminals at the bottom. The relay
is accurately calibrated at the factory and should
not be tampered with. Installation should be made
with the proper wire size (see heater selection
table) for the application and all wires must be
securely fastened. Preferably, the OLR should be
located in the same ambient as the motor to be
protected and in an area free of drafts. Heater
elements are supplied separately and must be
properly selected and securely mounted. Three
heaters must be used for either single or three
phase applications.
This industrial type control is designed to be
installed, operated, and maintained by adequately
trained workmen. These instructions do not cover
all details, variations, or combinations of the
equipment, its storage, delivery, installation, check
out, safe operation, or maintenance. Care must be
exercised to comply with local, state, and national
regulations, as well as safety practices, for this
class of equipment.
Control circuit contacts
The normally closed (NC) control circuit contact
is to be connected in series with the coil of a
magnetic contactor. This NC contact is equipped
with a follow contact which provides reliable
electrical continuity during a tripping condition. A
factory installed normally open (NO) control circuit
contact (single pole double throw - Form C) is
available for remote trip indication applications. AC
contact ratings are listed in Table 2.
Table 1. Catalog number
Type
Panel mounted A200 controller mounted
Size 1 Size 2 Size 00-0-1 Size 2
Ambient
Compensated
AA13P AA23P A A13A AA23A
Non-ambient
Compensated AN13P AN23P AN13A AN23A
Figure 1. Size 1 overload relay for panel
mounting
For NO/NC contacts add suffix B
Instruction Leaet IL14568 Effective June 2020
Supersedes April 1984

Manual Or Automatic Reset
The overload relay is normally furnished set for “HAND” reset opera-
tion. The relay may be set for either “HAND” or “AUTO” slightly
loosening the reset screw (1), holding the reset plate (2), moving the
plate to the proper position marked on the molded case (away from
the panel for”Hand” reset and toward the panel for”Auto” reset) and
retightening the screw. (See Figure 1.)
Automatic reset should not be used with 2-wire control circuits
where automatic starting of the motor may be hazardous.
Adjustable Trip
The trip rating of a specific heater element can be adjusted over
a range of approximately 85% to 115%. This is accomplished by
turning the adjustment knob (3) on the top of the relay to the respec-
tive stop position. This to alleviate nuisance tripping; or conversely, to
gain closer protection when desired.
Trip Indication
The Type A overload relay gives an immediate visible indication of
trip. When an overload occurs, which causes the relay to operate, a
trip indicator (5) projects out through a small opening at the bottom
of the relay. (See Figure 1.)
Ambient Compensation
Ambient compensated OLR’s have substantially the same trip
characteristics for ambient temperatures from -40C to 75C (-40F
to 167F). Because of a compensating bimetal, which maintains a
constant travel to trip distance independent of ambient conditions,
operation of this bimetallic relay is responsive only to heat generated
by the motor overcurrent passing through the heater element. The
compensating feature is fully automatic and no adjustments are
required over normal fluctuations in ambient temperatures. Overload
relays having ambient compensation can be identified by light gray
reset rods whereas non-compensated overload relays have red reset
rods.
Figure 2. Size 2 overload relay for A200 controller mounting Figure 3. Overload relay mounted on A200 controller
mIMPORTANT
DO NOT TAMPER WITH THIS TRIP INDICATOR AS IT IS AN INTEGRAL PART
IN THE CALIBRATION AND TAMPERING THEREWITH MAY CAUSES CHANG-
ES IN TRIP CHARACTERISTICS.
Table 2. Control contact ratings
AC
volts
Normally closed Normally open
Make Break Make Break
24-120
120-600
20A
2400 VA
2A
240 VA
5A
600 VA
0.5A
60 VA
Table 3. Power circuit terminals
NEMA Size Wire Size
1
2
#14 - 8 AWG
#14 - 3 AWG
Wire with copper conductors only
Table 4. Recommended driving torque
Location (Qty.)
Driving
Torque
(lb.-in.)
Main Power Connections (6)
Control Connections (2)
Heater Mtg. Screws (2/pole)
18 - 20 (Size 1)
45 - 50 (Size 2)
8 - 9
18 - 20
2
Instruction Leaet IL14568
Effective June 2020
Size 1 or 2Type AThermal Overload Relay, 3 Pole,
Ambient Compensated or Non-Compensated
EATON www.eaton.com

Heaters
Heaters are not included with the overload relay and must be
ordered separately per the heater selection table and the Information
listed below. When installing heaters be sure that connecting
surfaces are clean and heaters are attached securely to the relay
in the proper location with the screws provided. The trip rating of a
heater in a 40C Ambient is 125% of the minimum full load current
shown in Table 5 or 6. When tested at 600 percent of its trip rating,
the relay will trip in 20 seconds or less (class 20).
The heaters should be selected on the basis of the actual full load
current and service factor as shown on the motor nameplate or in
the manufacturer’s published literature. When the service factor of
the motor is 1.15 to 1.25, select heaters from the heater application
table. If the service factor of the motor is 1.0, or there is no service
factor shown, or a maximum of 115% protection is desired, select
one size smaller heater than indicated. When motor and overload
relay are in different ambient and when using non-compensated
overload relays, select heaters from the table using adjusted motor
currents as follows: decrease rated motor current 1% for each C
motor ambient exceeds controller ambient. Increase rated motor
current 1 % for each C controller ambient exceeds motor ambient.
For ambient compensated overload relays no adjustment in heater
selection is necessary for normal variations in ambient temperatures.
Short Circuit Protection
The relay will provide protection against abnormal load conditions to
current values exceeding normal locked rotor current; however, to
protect the relay from short circuit currents, branch circuit protection
must be provided per the National Electric Code. Protective device
ratings should not exceed the maximum values listed in the heater
application table. The relays, as protected are suitable for use on a
circuit capable of delivering not more than 5000 rms symmetrical
amperes.
Maintenance
Other than the normal tightening of all wire and heater connections,
no maintenance should be attempted on the unit. Complete replace-
ment of the unit must be made in the event of damage.
Medium-Voltage applications
The Type A OLR is used with current transformers and the "G" family
of heaters for coordination with mediumvoltage fuses. Since the
current transformers have a limited current output under short-circuit
conditions, no shortcircuit protection is required in their secondary
circuits supplying current to the Type "G" heaters. Wire the second-
ary circuits of the current transformers with #12 or #14 conductors.
Divide the motor full-load current by the transformer turns ratio to
determine the equivalent motor fullload current and select the appro-
priate heater from Table 5 for a service factor 1.15 medium-voltage
motor.
Table 5. Type G heaters
Code
Marking Heater Rating Equivalent Full-Load Current
G22
G23
G24
G25
G26
G27
G28
G29
G30
G31
G32
G33
G34
2.03A
2.23A
2.44A
2.69A
2.95A
3.23A
3.55A
3.90A
4.28A
4.67A
5.10A
5.50A
6.10A
1.63-1.78 Amperes
1.79-1.95 Amperes
1.96-2.15 Amperes
2.16-2.35 Amperes
2.36-2.58 Amperes
2.59-2.83 Amperes
2.84-3.11 Amperes
3.12-3.42 Amperes
3.43-3.73 Amperes
3.74-4.07 Amperes
4.08-4.39 Amperes
4.40-4.87 Amperes
4.88-5.30 Amperes
Table 6. F series heater selection
For compensated OLR’s in any size enclosure, and non-compensated OLR’s in
enclosures with volume not less than 5500 cu. in. Wire with 75C wire.
For use on one pole OLR’s
Code
Marking Full Load Current of Motor (Amperes) (40C Ambient)
Max. Protect.
Device
(Amp)
Load
Wire
Size
FH03
FH04
FH05
FH06
FH07
FH08
FH09
FH10
FH11
FH12
FH13
FH14
FH15
FH16
FH17
FH18
FH19
FH20
FH21
FH22
FH23
FH24
FH25
FH26
FH27
FH28
FH29
FH30
FH31
FH32
FH33
FH34
FH35
FH36
FH37
FH38
FH39
FH40
FH41
FH42
FH43
FH44
FH45
FH46
FH47
FH48
FH49
FH50
FH51
.25 - .27
.28 - .31
.32 - .34
.35 - .38
.39 - .42
.43 - .46
.47 - .50
.51 - .55
.56 - .62
.63 - .68
.69 - .75
.76 - .83
.84 - .91
.92 - 1.00
1.01 - 1.11
1.12 - 1.22
1.23 - 1.34
1.35 - 1.47
1.48 - 1.62
1.63 - 1.78
1.79 - 1.95
1.96 - 2.15
2.16 - 2.35
2.36 - 2.58
2.59 - 2.83
2.84 - 3.11
3.12 - 3.42
3.43 - 3.73
3.74 - 4.07
4.08 - 4.39
4.40 - 4.87
4.88 - 5.3
5.4 - 5.9
6.0 - 6.4
6.5 - 7.1
7.2 - 7.8
7.9 - 8.5
8.6 - 9.4
9.5 - 10.3
10.4 - 11.3
11.4 - 12.4
12.5 - 13.5
13.6 - 14.9
15.0 - 16.3
16.4 - 18.0
18.1 - 19.8
19.9 - 21.7
21.8 - 23.9
24.0 - 26.2
1A
1A
1A
1A
1A
2A
2A
2A
3A
3A
3A
3A
3A
3A
3A
3A
5A
6A
6A
6A
6A
6A
10A
10A
10A
15A
15A
15A
15A
15A
15A
20A
20A
20A
25A
25A
30A
30A
35A
35A
40A
45A
45A
50A
60A
60A
70A
80A
80A
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#14
#12
#12
#12
#10
#10
#10
Above heaters for use on size 1
FH52
FH53
FH54
FHSS
FH56
FH57
26.3 - 28.7
28.8 - 31.4
31.5 - 34.5
34.6 - 37.9
38.0 - 41.5
41.6 - 45.0
90
100
125
125
125
150
#8
#8
#8
#8
#6
#6
Above heaters for use on size 2
mWARNING:
TO PROVIDE CONTINUED PROTECTION AGAINST FIRE AND SHOCK HAZ-
ARD, THE COMPLETE OVERLOAD RELAY MUST BE REPLACED IF BURNOUT
OF A CURRENT ELEMENT OCCURS. SEE TABLE I.
3
Instruction Leaet IL14568
Effective June 2020
Size 1 or 2Type AThermal Overload Relay, 3 Pole,
Ambient Compensated or Non-Compensated
EATON www.eaton.com

Figure 4. Time/current trip and reset curves
Figure 5. Dimension drawing (Dim. in inches)
Figure 6. Connection diagram
The trip rating of a heater in a 40C ambient is 1.25 times the
minimum value of full load current listed for each heater.
Eaton
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United States
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All Rights Reserved
Printed in USA
Publication No. IL14568 / 002
June 2020
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
Size 1 or 2Type AThermal Overload Relay, 3 Pole,
Ambient Compensated or Non-Compensated
Instruction Leaet IL14568
Effective June 2020