40/41/42AA Series
ELECTRONIC
MOTOR PROTECTION
Product Overview
The 40AA, 41AA, and 42AA series
electronic motor protection modules
combine high performance and function
consolidation in order to provide reliable,
cost effective protection for your motor
needs. Used with Positive Temperature
Coefficient (PTC) sensors the
40/41/42AA modules protect against
locked rotor conditions, running overload
and high ambient temperature. The
innovative design offers additional
functions as well, such as minimum off
time delay, low voltage cutout and
bearing temperature protection. Also the
device is very safe and easy to calibrate
for voltage (no jumper is required).
Thermal protection is achieved by
monitoring the temperature of the motor
windings with PTC sensors. These
sensors can be the Klixon BA series or
any other compatible PTC sensor rated
Mark A or B. If the windings exceed the
rated trip temperature the sensor
undergoes a rapid change in resistance
relative to the change in temperature. As
a result of this change, the 40/41/42AA
modules' internal relays de-energize the
control coil of the external line break
contactor.
As the motor cools and acceptable motor
winding temperatures have been restored
the sensor resistance decreases to the
reset level. At this point the module will
reset itself automatically unless it was
set up for manual reset. In this case the
user is required to remove power from
the system for a minimum of 5 seconds.
ideal for many applications in the
HVAC/R industry as well as for industrial
systems. Some applications include
global commercial rooftop A/C, global
chiller applications, industrial pumps,
material handlers, elevators, escalators,
air compressors and industrial systems.
The 40/41/42AA series modules are
Product Specifications
General Specifications
Sensors/
Channels
Number
Channels
Line
Voltage
Sensor
Type
Time
Delay
Low Auto/Man
Max.
Units
Min.
Typical
Maximum
Voltage
Reset
o
Operating Temperature Range
C
-40
+70
3
3
1
1
1
1
1
3
3
3
1
3
3
3
2
1
1
3
3
3
3
3
1
1
1
3
1
1
1
1
40AA110E
40AA115E
41AA1105A
41AA1500E
41AA1600A
41AA1600E
41AA1606E
42AA100E
40AA100E
40AA300E
41AA1504E
40AA200E
40AA100A
40AA200A
40AA102A
None
5 min.
4 min.
None
2 min.
2 min.
4 min.
None
None
4 min.
None
4min.
None
4 min.
None
Automatic
Automatic
Automatic
Manual
Mark A
Mark A
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
Mark B
120/240
120/240
24
None
None
None
None
Yes
Supply Voltage
24 or 115-230 (±15%)
VAC
Rated Line Frequency
Hz
45
15
50/60
16
62
17
18
120/240
24V
Low Voltage Cut-Out Trip (24V Input)
Low Voltage Cut-In Reset
VAC
VAC
VAC
VAC
VAC
VAC
Automatic
Automatic
Automatic
Manual
120/240
120/240
120/240
120/240
120/240
120/240
120/240
24V
Yes
Low Voltage Cut-Out Trip (120V Input)
Low Voltage Cut-In Reset
79.5
160
85
90.5
94.5
Yes
None
None
Yes
Low Voltage Cut-Out Trip (240V Input)
Low Voltage Cut-In Reset
170
180
184
Automatic
Automatic
Manual
Yes
Automatic
Automatic
Automatic
Automatic
None
None
None
None
24V
24V
Printed in U.S.A. 11/2003
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