The three phase isolation transformer isolates the primary circuit from the secondary circuit. Isolating and insulating transformers are identical. These terms are used to describe the isolation of the primary and secondary windings, or insulation between the two. An isolating/distribution type transformer should be used on all systems that require grounding of the load. These transformers are designed for indoor installation in hotels, schools, factories, industrial and commercial buildings where a reliable power source is required for lighting and other low voltage equipment and machinery. Using Computer Assisted Design (CAD), our engineers have created a range of highly efficient transformers having long, trouble free life with reduced weight, size and cost.
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 insures, 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 secondary or output coil. The change of voltage (or voltage ratio) between the primary and secondary depends on the turn ratio of the two coils. Transformer terminations rated below 330A are supplied with suitable hardware and lugs for cable connection. Terminations above 330A are supplied with termination pads.
Steps for selecting required three phase transformer
1. Determine primary or supply voltage
2. Select secondary or load voltage
3. Verify three phase operation
4. Standard transformers are suitable for operation on a 50/60 hz system. Refer to factory for other frequencies
5. Determine KVA capacity of load. Select a transformer having a standard KVA rating equal to or greater than required by the load
6. Select autotransformer or double wound isolation type. Formula
for calculating three phase KVA:
KVA= (Volts x Amps x 1.73)/1000
Three Phase Isolation Transformer
Capacity: 1.1KVA~200KVA
Primary Taps ±2.5% & Taps ±5%
UL Listed, File No. E306418
Available in Copper (Cu) or Aluminum (Al) windings
Available Options Include:
Temperature Rise
Other Primary or Secondary Voltages
Custom sizes (specific KVA ratings)
Open Type (Core & Coils only) Enclosure Special Paint/ Finish |
