Three-phase
power refers to an electrical system that has three voltage or current curves.
While we are used to thinking of electric voltage as being constant (for
instance, receiving 240V service) in reality the voltage of an electric line is
continually fluctuating from positive to negative values. A three-phase system
delivers power along three wires, with each wire having its own voltage
curve.
3
phase power is able to cope with the electricity demands of larger and more
powerful appliances. This is why it is more commonly used in commercial
and industrial settings for driving big pieces of equipment that need a
lot of power. In some cases, a big residential property may also require 3 phase
due to more number of A.C., motors and heavy electrical equipments are used in it.
Three-phase
load balancing occurs when the loads of power supplies, such as a
three-phase rack PDU, are spread evenly across all three phases (L1/L2,
L2/L3, and L3/L1).
It
can be achieved by having an equal number of devices plugged into PDU outlets
for each phase and drawing an equal power load on each phase. Some
manufacturers provide three-phase PDUs with alternating phased power on a
per-outlet basis rather than per-branch.
Three-phase
load balancing is desirable because an unbalanced system can result in reduced
efficiency, tripped circuit breakers, and reduced useful life of equipment.
Advantages
of Balanced Three-Phase Power
·
Increased
utilization of the upstream electrical infrastructure capacity, resulting in
improved overall data center efficiency and can delay capital expenditures.
·
The
ability to support significantly higher power density in comparison
to a single-phase circuit with similar amperage.
·
Maintain
power factor of the incoming power and avoid penalties imposed by the utility.
·
Scalability
for future load requirements.
·
Fewer
whips and cables required, resulting in less airflow obstructions, a cleaner
work environment, and easier installation and maintenance.
·
Extend
the useful life of equipment.
·
Make
sure if you are using Electronics or Automation products in your home, it must
have 3 phase input options in it, so that you can easily manage and balance
your 3 phase load via that.
Three-Phase
Power Monitoring
Power
calculations for three-phase power systems can become significantly
more complicated when the load is out of balance. This occurs when the load
current between any two lines is significantly different than the load current
between the remaining line. When there is an unbalanced load, the efficiency of
the system and the amount of power being delivered will be reduced. Suppliers
of three-phase power intelligent rack PDU provide local current load
meters for each phase on the PDU, making it much easier to monitor and balance
the power than having to perform manual calculations.
