The purpose of the Automatic KVAR Adjuster is to provide the rig with a balanced generator power system while maintaining the main buss at 600 volts.
One of the most common problems plaguing today’s electric drilling rig is premature power limit brought on by an unbalanced generator supply. If the on-line generators are not balanced to provide equal power, the result is a circulating current between them, thus robbing the rig of usable power. When a generator is put on-line the final step is to balance the KVARs by adjusting the voltage of any or all generators that are on-line. This is a manual requirement and the responsibility of the person putting the generator on-line. Either the person does not fulfill this requirement or does not understand how to do it properly. The Automatic KVAR Adjuster relieves the manual KVAR adjustment responsibility of the rig personnel.
Should the rig personnel ever believe the Automatic KVAR Adjuster is not doing its job properly, they can simply turn the unit off and all voltage control is returned to the generator doors as it was before the Automatic KVAR Adjuster was installed.