Full-Volume Power Sales Solar Power Generation Insulation Transformer SPI Series Lightning Surge Protection Function
Low Voltage Distribution Line System Connection for Distributed Power Converters SPI® Transformer/Trans/Sun Power/Surge Protect Insulation Transformer
The 'SPI® Series', which incorporates SPI® transformers (DC current leakage prevention transformers), is designed for connecting to low-voltage distribution lines in industrial solar power generation systems aimed at selling all generated power. By implementing DC current prevention functions, it enables clean power supply (202V) to the grid. Additionally, the S series (amorphous) transformers, which reduce standby power at night, are also available, allowing you to choose according to your needs. SPI® Transformers / SPI® Insulated Transformers for Solar Power Generation 【Features】 ■ Complete isolation between the power conditioner and the grid ■ Voltage conversion (converts the output voltage of the power conditioner PCS to a low-voltage wiring voltage of 200V) ■ DC current leakage prevention function ■ Lightning surge prevention function ■ High efficiency and low standby power *For more details, please download the PDF or feel free to contact us. ◇ In the event of a power conditioner failure, the SPI® transformer (DC current leakage prevention transformer) is crucial for addressing DC magnetization issues in pole-mounted transformers. If a failure in the reverse conversion device (power conditioner, inverter) causes DC components to superimpose on the AC current flowing into the grid, the pole-mounted transformer will become DC magnetized, adversely affecting the voltage for consumers other than those with distortion-dispersed power facilities.
basic information
【Lineup】Available in 9 types of installation options. ■Type Z Series (Electromagnetic Steel Plate Insulation Transformer): Type A to I ■Type S Series (Amorphous Insulation Transformer): Type A to I ◇SPIⓇ Transformer is equipped with lightning surge cut function, reducing surge waveforms of AC 10kV by -40 to -50dB (approximately 1/100 to 1/316 = 100 to 31.6V), thereby attenuating lightning surges from the system side and protecting the power converter (PCS). ◇The S Series (Amorphous Core Insulation Transformer) achieves significant energy-saving effects while suppressing no-load loss (standby power). In solar power generation systems under the FIT purchase system, it is essential to prevent the direct current generated by the panels from flowing into the power lines and to protect the system from lightning surges coming from the power lines. Additionally, to increase profit from selling electricity, measures against overloading (panel generation capacity exceeding PCS capacity) are necessary. Although excess power from overloading is wasted, there is a significant advantage in being able to provide stable power supply with SPI transformers, which efficiently generate power even with limited sunlight, despite having many panels installed.
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Model number/Brand name
Full-Volume Electricity Sales SPIⓇ Series (The SPI series is a registered trademark of Tsuruta Electric Co., Ltd.)
Applications/Examples of results
◇Lightning-Prone Area◇ The SPI® transformer (SPI-transformer / insulated transformer) is a transformer developed based on the principle of preventing lightning surges through high-frequency insulation effects and high voltage resistance, allowing surges to be discharged to the ground. When a surge enters electronic equipment, it progresses towards the ground while destroying areas with low insulation or withstand voltage until its energy is exhausted. If a signal ground is established in the electronic equipment, it effectively creates a surge destruction pathway, which is very dangerous. In cases where the electronic equipment is ungrounded and the surge is electromagnetically induced, it can lead to the generation of very high voltage at the insulation part, similar to an open secondary side of a CT circuit on the current meter side, resulting in destruction due to spark discharge. In this case, the path of the surge's progression is unpredictable. The SPI transformer is designed to prevent lightning surges that have invaded the system side from transitioning to the power converter side. ◇Concern about Salt Damage: Coastal Areas ◇ When installed in coastal areas, measures against salt damage are necessary. The SPI transformer exhibits excellent corrosion resistance due to treatment for salt-resistant and heavy salt-resistant specifications, effectively preventing equipment failure and reducing recurring maintenance costs.
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At our domestic factory certified to international standards, we carry out integrated in-house production, from transformer development to manufacturing, inspection, certification, and shipping. Including the manufacture of transformers for medical equipment, semiconductor manufacturing equipment, machine tools, and other applications, we also offer a wide range of products and technologies for various fields, with the mission of providing safe electricity supply, including full amount self-consumption solar power generation systems and switchboards for industrial battery storage systems. With over 50 years of proven technology and expertise, we provide energy solutions such as various transformers and power reception/supply systems. We manufacture optimised transformer products for a wide range of applications and specifications, including machinery, equipment, systems, and various types of plants. In addition, we offer transformer systems for renewable energy/solar power generation systems, with a track record of manufacturing and installing more than 15,000 units. We propose solutions that take into account installation and construction issues as well as environmental conditions, with a focus on safety and reliability. Furthermore, in battery storage systems, we deliver optimal solutions for efficiently utilising solar power generation.