Rockwell Automation 2364E Non-Regenerative DC Bus Supply Unit (NRU) - Manual (Page 88)

Publication 2364E-5.01 April 2002
C-8 NRU Details
6. Set the IMBALANCE dial. This setting should be the maximum
allowable imbalance in phase voltage that the 3-phase system can
tolerate. Too low of a setting can cause nuisance tripping. Too
high of a setting may not adequately protect the system.
7. Connect the output terminals as shown in Figure 10.
8. When all connections have been made, apply Line Voltage. The
light emitting diode (LED) indicator will illuminate steady, the
internal relay will energize, and the 3-phase system will become
operational.
9. If the LED flashes during regular operation, one of the four fault
conditions has occurred. REMOVE LINE VOLTAGE, and check
for presence of all three phases, phase imbalance, and low voltage
conditions. Correct if necessary.
Monitor Operation
When the voltage input parameters to the D65 are normal, the red
LED will be on. Once the unit has responded to an undesirable circuit
condition by releasing the output relay, the LED will blink.
Reset
Upon the correction of the fault condition, the D65 will reset
automatically.