Uninterruptible Phase Transfer
- When both power sources are normally input during manual or automatic operation, synchronous switching
- Conditions of synchronous switching
There should be no phase loss, overvoltage, undervoltage, reverse phase within ± 10% of voltage difference of both power sources, frequency difference within ± 1.0Hz, phase angle ± 5 degrees.
Synchroscope function for phase comparison
Priority selection function
Peak shaving (peak control)
Interlock control
Interlock bypass control feature
Generator test, start signal output, speed adjustment
Protective action : REVERSE PHASE , OPEN PHASE , UNDERVOLTAGE , OVERVOLTAGE, UNDER FREQUENCY , OVER FREQUENCY

CTTS-801 controller is selected when ordering CTTS.