I N S TA L L AT I O N , O P ER AT I O N S A N D M A I N T EN A N C E M A N UA L
53
Overload heaters for controllers with NEMA
Size 7 starters for standard and ambient-
compensated ratings, CT ratio 800:5.
Maximum Motor
Full-Load Current
Current Transformer
Secondary Amps
Heater
Number
CR 123
346-387
2.16-2.42
C326A
388-461
2.43-2.88
C356A
462-515
2.89-3.22
C379A
516-565
3.23-3.53
C419A
566-622
3.54-3.89
C466A
623-688
3.90-4.30
C526A
689-763
4.31-4.77
C592A
764-810
4.78-5.06
C630A
WARNING
Electronic overload for circuit breaker and
fused controllers
The tripping current is 120% of the dial setting.
For continuous-rated motors with a service factor
of 1.15 to 1.25, set the dial to the motor full-load
current. For continuous-rated motors with a
service factor of 1.0, set the dial to 0.9 of the motor
full-load current. Refer to GEH-6430 or 6431
before energizing.
Opening of the branch-circuit protective device
may be an indication that a fault current has been
interrupted. To provide continued protection
against £re or shock hazard, examine all current-
carrying parts and other components of the motor
controller and replace any damaged components. If
heater burnout occurs, the complete overload relay
must be replaced.
Catalog numbers of electronic overloads
for various sizes of NEMA starters and
current ranges.
NEMA
Size
FLA
Range in
Amps
Catalog
Number
Breaker Frame and Type
1
0.8 to 1.59
CR324CXD
E Mag. and Thermal Mag.
1
1.6 to 3.19
CR324CXE
E Mag. and Thermal Mag.
1
3.2 to 6.49
CR324CXF
E Mag. and Thermal Mag.
1
6.5 to 12.8
CR324CXG
E Mag. and Thermal Mag.
1
13 to 27
CR324CXH
E Mag. and Thermal Mag.
2
13 to 25.6
CR324DXG
E Mag. and Thermal Mag.
2
26 to 49.9
CR324DXH
E Mag. and Thermal Mag.
2
50 to 100
CR324DXJ
E Mag. and Thermal Mag.
3
17 to 34.9
CR324FXK
E Mag. and Thermal Mag.
3
35 to 64.9
CR324FXL
E Mag. and Thermal Mag.
3
65 to 90
CR324FXM
E Mag. and Thermal Mag.
4
17 to 34.9
CR324FXK
E,F and G Mag. and
Thermal Mag.
4
35 to 64.9
CR324FXL
E,F and G Mag. and
Thermal Mag.
4
65 to 135
CR324FXM
E,F and G Mag. and
Thermal Mag.
5¹
32 to 64.0
CR324GXN
G Mag. and Thermal Mag.
5¹
65 to 129.9
CR324GXP
G Mag. and Thermal Mag.
5¹
130 to 270 CR324GXQ
G Mag. and Thermal Mag.
6²
130 to 259.9
CR324HXS
E,F and G Mag. and
Thermal Mag.
6²
260 to 540
CR324HXT
K Mag. and Thermal Mag
Provide short-circuit protection in accordance with
NEC Article 430 or CE Code Part 1. Tripping current
is 120% of Dial setting. Motors with 1.15-1.25
service factor, set dial to motor FLA Motors with
1.0 service factor, set dial to 0.9 motor FLA.