How to determine the reasonable capacity of the transformer
Firstly to investigate the electrical parts of the supply voltage and
the user's actual load and the local conditions, then refer to the
transformer nameplate marked technical data one by one, generally from
the transformer capacity, voltage, current and environmental conditions,
in which the capacity selection should be determined according to the
user with the electrical equipment capacity, nature and time required to
load, in order to choose the transformer capacity.
During normal operation, the transformer should bear the electricity
load of transformer rated capacity of 75 ~ 90%. In the operation of the
transformer can be measured by the actual bearing load of 50 to less
than%, should be replaced with small capacity transformer, such as
transformer rated capacity greater than the large transformer should be
replaced immediately.
At the same time, in the selection of the transformer primary coil
voltage line power transformer according to the decided value according
to the voltage of secondary coil of the electric equipment, the best
choice for low voltage three-phase four wire power supply. This can also
provide power and electricity for lighting.
For the current selection should be paid attention to in the motor
starting load can meet the requirement of the electric motor (because
the motor starting current should be 4 to 7 times larger than the
sinking operation).
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