Acme General Purpose Distribution Transformers
A transformer is an electrical apparatus designed to convert alternating current from one voltage to another. It can be designed to “step up” or “step down” voltages and works on the magnetic induction principle. A transformer has no moving parts and is a completely static solid-state device, which ensures, under normal operating conditions, a long and trouble-free life. It consists, in its simplest form, of two or more coils of insulated wire wound on a laminated steel core. When voltage is introduced to one coil, called the primary, it magnetizes the iron core. A voltage is then induced in the other coil, called the secondary or output coil. The change of voltage (or voltage ratio) between the primary and secondary depends on the turn's ratio of the two coils.
Features & Benefits
Typical Applications for Transformers
- Distribute power at high voltage
- Eliminate double wiring
- Operate 120-volt equipment from power circuits
- Insulate circuits/establish separately derived circuits
- Provide 3-wire secondary circuits
- Buck and Boost
- Provide electrostatic shielding for transient noise protection
Operating at Non-Nameplate Voltages
Transformers may be operated below their rated voltage but not above, unless equipped with proper taps. Lowering voltage reduces kVA capacity proportionally. For example, a 10 kVA 480V-240V transformer operated at 240V would provide 120V at 5 kVA capacity.
Using Single-Phase Transformers for Three-Phase Loads
Three single-phase transformers can serve a three-phase load using delta or wye configurations. Avoid wye-wye setups due to voltage instability. For example, three 10 kVA single-phase units yield a total 30 kVA three-phase capacity when properly connected.
Other Types of Transformers
Buck Boost Transformers
With nearly two-thirds of all electrical loads being AC motor loads, maintenance of the proper voltage to that motor is very important. If the supply line voltage is not maintained, motor winding current is increased causing reduced motor torque and escalating motor temperature, all of which results in the rapid loss of insulation life expectancy.
Anytime you have a lower than standard voltage, equipment damage and failure can result. Buck-boost transformers are an economical way to correct this potentially very serious problem. Anytime a line voltage changes in the 5-20% range is required, a buck-boost transformer should be considered as your first line of defense.
Drive Isolation Transformers
The Acme Drive Isolation Transformers are specifically designed to handle the mechanical stresses, voltage distortions, and harmonics associated with AC and DC variable speed drives. Acme’s Drive Isolation Transformers maximize the power quality benefits gained from standard isolation transformers by:
- Preventing overheating due to harmonics
- Limiting harmonic peaks
- Increasing the ground fault tolerance of connected variable frequency drives
- Minimizing the transfer of inverter switching noise