Eaton Cooper Power Series Installation, Operation And Maintenance Manual

Also see for COOPER POWER SERIES: Installation and operation instructions Installation instructions Installation instructions Installation and operation instructions Operation instructions

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Eaton Cooper Power Series Installation, Operation And Maintenance Manual Manual pdf 30 page image

Determination of leading or lagging in delta-connected regulatorsFor a regulator to operate properly when connected phaseto phase, it is necessary for the control to be programmedwith the correct regulator configuration in FC 41. It must bedetermined whether it is connected leading or lagging. Thecontrol aids the operator in making this determination.1. Regulator must be installed.2. POWER switch must be set to INTERNAL.3. V1 knife switch (and V6, if present) must be closed.4. Knife switch C must be open. Current must be flowing.5. CONTROL FUNCTION switch may be in any position(AUTO/REMOTE-OFF-LOCAL MANUAL).6. For regulator #1, set FC 41 to Delta Lagging and recordthe Power Factor, FC 13.7. For the same regulator, set FC 41 to Delta Leading andrecord the Power Factor.8. Repeat steps 6 and 7 for each regulator in the bank.9. For each regulator, one of the two power factor valueswill be reasonable and the other will be unreasonable.10. Set the Regulator Configuration (FC 41) to the valuewhich produced the reasonable power factor.See Table 6.For one regulator: Set FC 41 to the value which producedthe reasonable power factor.For two regulators in open delta: See the example inTable 6. In an open delta connection, one of the regulatorswill always be leading and the other lagging. The reasonablepower factor for each regulator should be very close tothe typical power factor of the system. In this example,regulator #1 is the lagging unit and regulator #2 is theleading unit.For three regulators in closed delta: In closed delta, allthree regulators are either leading or lagging, dependingon how they are connected relative to generator phaserotation. Set FC 41 of all three regulators to the value whichproduced the reasonable power factor.Table 6 Sample power factor values for regulatorsconnected in open delta configurationConfiguration (FC 41)Recorded power factor (FC 13)Reg. #1 Reg. #2Delta Lagging 0.94* -0.77Delta Leading 0.17 0.93** Reasonable power factor values.24INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225003EN April 2018CL-7 Voltage Regulator Control