Phase Rotation Protection
A phase sequence relay shall be tted for units containing 3 phase scroll compressors, to prevent possible damage by
running the compressor in the wrong direction.
Automatic Power Factor Correction Feature
The automatic power factor correction shall be tted to the Chillers electrical distribution system. This feature will provide
automatic regulation of unit power factor, taking into account all AC load types in the form of compressors, fans and
pumps.
The power factor correction system consists of a PFC regulator and a number of dissimilar sized capacitors that are
switched in by means of contactors. The regulator type used has 6 staged outputs that switch in a binary fashion
resulting in a total number of 64 unique capacitor step values.
During operation the PFC regulator measures the reactive power drawn by the unit and then dependant on the
instantaneous unit load and user congurable target PF value, automatically switches in the necessary capacitor stages
to achieve the desired unit target PFC. Factory set to a 0.98PF.
Single Point Isolation
Single point isolation shall be tted as a standard feature.The feature is however available to be removed upon request,
subject to your own 3 phase unit mains isolator.
Electronic Soft Start
The electronic soft start enables the chiller compressor motor to be ramped to speed with the minimum full load current.
Further benets include removal of nuisance tripping, supply voltage dips and motor overheating.
Power Meter
A power meter shall be tted to the unit. Voltages, currents and power inputs can be monitored and recorded giving
power usage of the chiller. Current transformers are tted to the unit’s incoming supply.
Optional Features
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