Power Capacitors
September 12, 2024
TDK launches 3-phase AC filter capacitors filled with nitrogen gas for long service life and high temperatures
TDK Corporation (TSE:6762) announces the EPCOS B32377G, a new series of three-phase AC filter capacitors in delta connection filled with nonflammable nitrogen gas instead of the soft polyurethane resin used in the existing series. In line with the megatrend of the electrification of mobility and renewable energies, these capacitors suppress harmonic distortions and reduce reactive power at the input and/or the output of inverters. As a result, they improve the power quality and can make applications more reliable, such as wind and solar energy as well as industrial drives.
These components, with a diameter of 75 to 136 mm and heights between 218 to 351 mm, range from 3 x 15 µF to 3 x 330 µF with rated RMS voltages of 330 to 1000 V. As for lifetime expectancy at rated voltage, the series can operate for 250,000 hours at +70 °C at the hotspot, compared to the typical 100,000 hours of oil-filled components – and has a maximum hotspot temperature of +90 °C compared to the hotspot temperature of +85 °C for the oil-filled technology.
The winding construction is based on a metalized polypropylene film with self-healing properties. It shows low losses (tan ẟ) of 0.7 to 1.2 ∙ 10-3 and a high pulse-current withstand capability of up to 27.3 kA. Their maximal RMS current can be 82 A at +55 °C.
The components are equipped with overpressure disconnectors for all three phases to ensure controlled disconnection in case of overload. Cage clamps with M4, M5, or M6 are used as terminals.
Features & Applications
Main applications
- Input and output filters in inverter systems
- Filtering of harmonic distortion in power inverters
Main features and benefits
- Self-healing properties
- Low dissipation factor
- Delta connection for rated RMS voltages of 330 to 1000 V
- Filled with nitrogen gas, dry type
- Service life of 250,000 hours at a hotspot temperature of +70 °C and rated voltage
- Maximum hotspot temperature of +90 °C
Further information on the products can be found at https://www.tdk-electronics.tdk.com/en/2891052/ac_filtering
About TDK Corporation
TDK Corporation is a world leader in electronic solutions for the smart society based in Tokyo, Japan. Built on a foundation of material sciences mastery, TDK welcomes societal transformation by resolutely remaining at the forefront of technological evolution and deliberately “Attracting Tomorrow.” It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK‘s comprehensive, innovation-driven portfolio features passive components such as ceramic, aluminum electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads and more. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2024, TDK posted total sales of USD 14.6 billion and employed about 101.000 people worldwide.