Larson Electronics
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25 kVA Isolation Transformer - 208V Primary - 120240V Secondary - NEMA 3R - Single Phase
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25 kVA Isolation Transformer - 208V Primary - 120240V Secondary - NEMA 3R - Single Phase
25kVA transformer with electrical grade silica and resin compounds that enclose core and coil to seal out moisture and air.
25 kVA Isolation Transformer - 208V Primary - 120240V Secondary - NEMA 3R - Single Phase

25 kVA Isolation Transformer - 208V Primary - 120240V Secondary - NEMA 3R - Single Phase

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25kVA transformer with electrical grade silica and resin compounds that enclose core and coil to seal out moisture and air.
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What Stands Out

High Capacity
With a robust 25 kVA capacity, this isolation transformer efficiently handles demanding electrical loads, ensuring reliable performance in industrial and commercial settings.
Dual Voltage Output
Offering versatile 120/240V secondary outputs, this transformer accommodates a variety of applications, making it ideal for diverse equipment requirements.
Weather Resistant
Housed in a NEMA 3R enclosure, the transformer provides superior protection against rain and dust, ensuring long-lasting operation in outdoor and harsh environments.

Product Details

Shop 208V to 120240V Single Phase NEMA 3R Isolation Transformer. Get the best deals on electrical transformers at Ubuy Trinidad and Tobago.
Item Weight280 lbs (127.01 kg)

Who Should Buy?

Suitable For
  • Industrial Facilities

    Ideal for manufacturing plants needing robust isolation for sensitive equipment and to reduce electrical noise.

  • Commercial Applications

    Perfect for businesses requiring reliable power supply and protection for sensitive electronic devices.

  • Service Providers

    Beneficial for contractors and service providers installing systems requiring isolation and voltage transformation.

Not Suitable For
  • Small Residential Use

    Not suitable for home use due to its capacity being too high for typical residential electrical needs.

Product Description

25 kVA Isolation Transformer - 208V Primary - 120240V Secondary - NEMA 3R - Single Phase

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is an isolation transformer, and how does it work?

    Answer: An isolation transformer is a type of transformer that transfers electrical energy between two circuits through electromagnetic induction without a direct electrical connection. It provides galvanic isolation, which helps in reducing electrical noise, protecting sensitive equipment, and ensuring safety. By isolating the primary circuit from the secondary, it minimizes the risk of shock and protects against power surges. This is particularly useful in industrial settings where sensitive electronics require stable and clean power supply.
  • Question: What applications are suitable for a 25 kVA isolation transformer?

    Answer: A 25 kVA isolation transformer is ideal for various industrial, commercial, and residential applications, including machinery power supply, data centers, and audio/video equipment. It is particularly beneficial in environments needing stable voltage levels and noise reduction, such as hospitals and laboratories, where equipment sensitivity is paramount. This transformer is also used in renewable energy systems to separate the solar power generation circuit from the utility grid while maintaining safety standards.
  • Question: What is the significance of the NEMA 3R rating?

    Answer: The NEMA 3R rating signifies that the isolation transformer is designed for outdoor use and is protected against rain, sleet, and snow. This makes it suitable for installations in tough environments, ensuring that it operates reliably even under harsh weather conditions. By preventing moisture ingress, it prolongs the lifespan of the transformer and maintains performance integrity, making it a preferred choice for outdoor applications where robustness is essential.
  • Question: Can I use a 25 kVA isolation transformer with multiple devices?

    Answer: Yes, you can use a 25 kVA isolation transformer to supply power to multiple devices, provided that the combined power requirements do not exceed its capacity. This is particularly useful in setups where diverse equipment such as computers, machinery, or lighting systems need a stable power source. Just ensure that the total load on the secondary circuit is managed effectively to avoid overloading the transformer.
  • Question: What is the difference between single-phase and three-phase transformers?

    Answer: Single-phase transformers, like the 25 kVA isolation transformer described, use a single alternating current (AC) waveform to transmit power, ideal for smaller loads. In contrast, three-phase transformers utilize three AC waveforms, providing a more efficient power supply for larger, industrial applications. Single-phase systems are easier to install and are commonly used for residential power distribution, while three-phase transformers are vital for running heavy machinery and industrial equipment.
  • Question: How do I determine the correct transformer size for my application?

    Answer: To determine the correct transformer size, evaluate the total power requirements of all devices intended to be powered by the transformer, considering both startup and continuous running loads. Calculate the total wattage and then divide it by the voltage to ensure the transformer’s kVA rating meets or exceeds this requirement. For instance, if your devices have a total load of 20 kW and operate at a voltage of 240V, a 25 kVA transformer would be more than adequate.
  • Question: What are the primary benefits of using an isolation transformer?

    Answer: The primary benefits of using an isolation transformer include enhanced safety by minimizing electric shock risks, improved equipment protection against surges and spikes, and reduction of electrical noise. Isolation transformers help create a stable power environment, essential for sensitive electronic equipment such as computers and laboratory instruments. They also facilitate grounding and can assist in the proper functioning of UPS systems in ensuring consistent power quality.
  • Question: What does the secondary voltage rating of 120/240V mean?

    Answer: The secondary voltage rating of 120/240V indicates that the transformer can provide two output voltages: 120V for smaller devices and 240V for larger equipment like ovens or air conditioners. This versatility allows you to power a range of appliances needing different voltages from a single transformer, streamlining your electrical setup. It's a practical feature for both residential and commercial setups where varying power needs exist.
  • Question: What should I consider before installation?

    Answer: Before installation, consider the location, ensuring it is dry and adequately ventilated. Check the load capacity and ensure that the electrical connection is prepared for the primary voltage of 208V, as well as confirming the installation complies with local electrical codes. Additionally, assess whether proper grounding measures are in place. Proper installation is crucial for safety and performance, so enlisting a licensed electrician for the setup is advisable.
  • Question: Where can I buy a 25 kVA Isolation Transformer - 208V Primary - 120/240V Secondary - NEMA 3R - Single Phase?

    Answer: You can buy the 25 kVA Isolation Transformer - 208V Primary - 120/240V Secondary - NEMA 3R - Single Phase from Ubuy, which is a reliable online platform that provides a wide range of electrical components and equipment. Ubuy operates in Trinidad and Tobago and is known for its quality offerings and customer service, making it a preferred choice for purchasing specialized transformers and related electrical products.

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Features & Benefits

  • 25kVA transformer
  • Electrical grade silica and resin compounds completely enclose core and coil
  • Seals out moisture and air
  • UL 3R enclosure meets or exceeds all listing criteria
  • Flexible copper lead wire terminations for easy wiring
  • Ground studs for use with non-metallic conduit

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