08-16-2017, 09:22 PM
Buck-Boost Powerformer
[attachment=653]
Jefferson Electric single-phase Buck-Boost transformers are the most economical means available
for stepping voltages up or down in many common applications. They can be used as isolating (or
insulating) transformers for transforming standard line voltages to low secondary voltages. They are
also used to buck or boost off-standard line voltages to satisfy standard load voltage requirements
when connected in an autotransformer configuration.
These transformers are designed for use on single- or three-phase circuits to supply 12/24 or
16/32 volt secondaries with 120/240 volt primary, and 24/48 volt secondaries with 240/480 volt
primary. When connected in an autotransformer configuration, these small, compact and lightweight
units will handle a large KVA load in comparison to their physical size and relative cost. When used as
isolation transformers, they have innumerable low voltage applications.
In an autotransformer, the input (or primary) and the output
(or secondary) are electrically connected, while in an isolation
transformer they are completely separated, as shown to the right.
Only a portion of the electrical energy is changed in an autotransformer,
the remainder flowing directly between the primary
and secondary.
Solve over/under line voltage problems efficiently
and economically.
Electrical equipment is manufactured to operate most efficiently when the line voltage is equal to or
nearly equal to the nameplate rating of the equipment. A motor operated at a voltage substantially
under its nameplate rating may run constantly on the starting windings, resulting in overheating and
possible burn-out. The same motor operated at a voltage substantially over its nameplate rating is
subject to excessive heat rise, often extending beyond the insulation temperature limits, which may
eventually cause the motor to burn out.