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

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4.4 WIRING GUIDELINES
Follow all local electrical codes for installation requirements and wire sizing. Size the power
wiring as per local code and on long wire runs it is recommended to use a larger wire size.
Power factor correcting capacitors MUST NOT be connected to the DC Injection unit output.
If desired, they must be connected on the line side of the unit. Capacitors can be connected
before starting or preferably after the motor has reached full speed.
For short-circuit fuse protection refer to the table in Section 2.
4.5 START UP
4.5.1 CHECKS BEFORE POWER-UP
4.5.1.1 Ensure that all electrical connections are completed as shown on schematics in
section 6, and that connections are properly tightened. The most important
connection is the interlock between the DC Injection unit and the starter.
4.5.1.2 Ensure that the burden resistor is equal or larger than the value listed in the
following table or calculated by the following equation :
Rb = Effective Current Transformer Ratio ÷ Motor Nameplate Amps
4.5.1.3 Set JP1 link to LO.
4.5.1.4 Adjust RV2, braking torque, and RV1, braking time, to 50%.
4.5.1.5 Install a Disable switch between terminals 2 and 4 of J3 in the open position.
Switch is to be closed once the motor has reached zero speed or if any
problems occur during braking.
4.5.1.6 If a Disable switch is not used, then set RV2 to 30%, about 20 seconds or
lower.
WARNING
DO NOT OPEN LOAD SIDE DISCONNECTING DEVICE DURING
DC INJECTION CYCLE. FAILURE TO OBSERVE THIS WARNING
WILL RESULT IN DAMAGE TO THE DISCONNECTING DEVICE
AND MAY CAUSE PERSONAL INJURY.
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