A LOOK AT SERVICE SAFETY
Compressor Motor and Component Information
29
Potential Type Relay Supplier Code Designations
In recent years, Tecumseh has used an increasing
number of potential relays with hermetic compres-
sors. A large number of these have been used on air
conditioning applications, but there are also many
other applications. Since there are many variations
with regard to these relays such as number of termi-
nals, coil group, hot pick up, and mounting posi-
tion, an explanation of the code numbers should be
useful in the field.
Tecumseh has two major suppliers of potential
relays: the General Electric Company and the sup-
plier of White Rodgers relays. An explanation of the
code designation for relays manufactured by each of
these companies is provided in Figures 3-20 and 3-
21.
Figure 3-20.
Explanation of GE Potential Relay Code.
3ARR3-
A
3
Potential Relay
Type
Mounting
Position
C
Number of
Terminals and
Bracket
5
Coil Group
(Continuous
Voltage)
Calibration
(Hot Pickup)
(Volts)
A = 5 screw terminal "L" bracket
B = 5 screw terminal Flat bracket
C = 3 screw terminal "L" bracket
D = 3 screw terminal Flat bracket
E = 5 quick connect terminal "L" bracket
See note on page 31.
1 = Face down
2 = Face up
3 = Face out — numbers horizontal
4 = Face out — rotated 90 clockwise from number 3 position
5 = Face out — numbers upside down - horizontal
6 = Face out — rotated 90 counterclockwise from number 3 position
A = 260-280
B = 280-300
C = 300-320
D = 320-340
E = 340-360
F = 350-370
G = 360-380
H = 365-395
J = 120-130
K = 130-140
Note: Room temperature
calibration is 5 to 7% lower
than these values.
2 = 168
3 = 332
4 = 502
5 = 253
6 = 420
7 = 130
8 = 214
10 = 375
L = 140-150
M = 150-160
N = 160-170
P = 170-180
R = 180-190
S = 190-200
T = 200-220
U = 220-240
V = 240-260
W = 210-230
Example: 3ARR3-A5C3
