Eaton Cutler-Hammer TRU-START, Operation And Installation Manual

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MODEL MOTOR
AMPS
BURDEN
RESISTOR (¼ W)
EFFECTIVE CT
RATIO
TRU-015-P c/w DCI 10
68
Ω
750 : 1
15
47
Ω
TRU-020-DCIor
TRU-030-P c/w DCI
20
39
Ω
750 : 1
30
27
Ω
TRU-040-DCI or
TRU-050-P c/w DCI
40
39
Ω
1500 : 1
50
33
Ω
TRU-080-DCI or
TRU-080P c/w DCI
60
39
Ω
2500 : 1
80
33
Ω
TRU-125-DCI or
TRU-125-P c/w DCI
100
27
Ω
2500 : 1
125
22
Ω
TRU-200-DCI or
TRU-200-P c/w DCI
150
18
Ω
2500 : 1
200
12
Ω
TRU-300-DCI or
TRU-360-P c/w DCI
200
27Ω
5000 : 1
300
18
Ω
TRU-500-DCI or
TRU-500-P c/w DCI
400
22
Ω
8500 : 1
500
18
Ω
4.5.2 WITH POWER ON
4.5.2.1 Run the motor up to full speed and command the starter off. If the motor
reaches zero speed from the DC injection cycle, close the switch to the Disable
Input to disable the braking.
4.5.2.2 Re-adjust the braking torque pot, RV2, if the actual braking time has to be
increased or decreased to bring the motor to zero speed.
4.5.2.3 Once the braking torque is set, then adjust RV1 to match the DC injection time
with the actual stopping time of the motor. Typically, the injection should cease
when the motor is at zero speed or shortly after. LD1, DC INJCT is an
indication of braking. Each 10% graduation in RV1 corresponds to
approximately 6 seconds.
WARNING
ALLOW TIME FOR THE MOTOR TO COOL BEFORE ANOTHER
START / STOP SEQUENCE IS INITIATED
FREQUENT START / STOP COULD CAUSE MOTOR DAMAGE
DUE TO OVERHEATING
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