Trinity ACCUVAR, User Manual, Page: 6 / 27

pg. 6
TRINITY
ACCUVAR - Operational Manual
Introduction:
Every Power distribution system requires reliable metering of various electrical
parameters. From the electricity user's point of view, this is important for saving of
electrical energy, where-ever possible. Not only should his distribution transformer
be loaded optimally, but it should also operate at near unity power factor. The load
imbalance on the three phases should be within reasonable limits. Thus, information
like amount of loading imbalance, power factors at different times of the day, peak
loading hour etc. can be of great help in planning usage of power and also
implementing automatic switched capacitor systems to maintain power factor near
unity. This is where ACCUVAR comes in. ACCUVAR is a KVAR based controller
which controls capacitor banks optimally to achieve near unity power factor and also
which measures/calculates various electrical parameters. ACCUVAR is meant for
use in three phase four wire electrical system. It uses the three watt-meter method
to calculate KVA, KW & KVAR.
ACCUVAR is based on a powerful micro-controller. The controller receives voltage
& current signals and performs high speed measurement and calculations, typically
finishing one complete measurement cycle in less than a second.
The unit displays all parameters locally on a 128 x 64 Display. The user-friendly
keypad on the front makes programming the unit (for C.T. ratios etc.) very easy.
ACCUVAR is thus a very versatile controller and accurate information interface for
the user.