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Innovations from Hanau boost efficiency of PV systems:
VACUUMSCHMELZE again presents current sensors,
chokes and power transformers at the Photovoltaic Solar
Energy Symposium, Bad Staffelstein
Press Contact:
Adalbert Ströhle
VACUUMSCHMELZE GmbH &
Co. KG
Tel. +49 (0)6181 / 38-0
Fax +49 (0)6181 / 38-2645
Adalbert.Stroehle@
Vacuumschmelze.com
Havana Orange GmbH
Cornelia Krannich
Tel.: 089/9213151-53
Mobil: 0162/4946037
E-Mail: [email protected]
No.: 01/14
th
Hanau, 5
February 2014
Hanau / Frankfurt – Banz Monastery, Bad Staffelstein will once again become the central meeting-point for the PV industry from 12 to 14 March
2014, when representatives from industry, research and politics convene at
the 29th Photovoltaic Solar Energy Symposium. In addition to fraught topics including cut-throat competition and the mounting criticism of solar
energy subsidies, a key focus of this year's event will be the efficiency of
PV systems. Hanau-based VACUUMSCHMELZE GmbH & Co. KG (Hanau),
Contact for readers‘ inquiries:
VACUUMSCHMELZE GmbH &
Co. KG
Postfach/P.O.B. 22 53
D-63412 Hanau
Tel. +49 (0)6181 / 38-0
Fax +49 (0)6181 / 38-2645
[email protected]
www.vacuumschmelze.com
which will again take part in the capacities of both sponsor and exhibitor,
makes a vital contribution in this field, with its range of products using innovative nanocrystalline materials that deliver outstanding reliability, precision and price/performance ratio for today's solar inverters.
Current sensors from VACUUMSCHMELZE perform a range of functions in
solar inverters, such as monitoring the AC output current that is fed into the grid
and its DC component. Unlike conventional Hall-effect sensors, these current
sensors use a VAC-developed magnetic field probe incorporating a cobalt based
amorphous alloy, which offers an array of benefits such as minimal offset current
and negligible long-term drift.
A new range of PCB mounted current sensors with model numbers 4646X7xx has been introduced. Features are largely identical to VAC's highly successful, ultra-compact 4646-X6xx range, but with the additional benefit of increased creepage and clearance distances for use with higher system and operating voltages (600 V / 1020 V as per EN 61800). The X7xx series also incorporates four current bars instead of three, bringing the advantages of reduced current density and an increased range of series/parallel connection options to enable users to adjust the measurement range to their application.
AC/DC-sensitive differential current sensors (DI sensors) form the core of
residual current monitoring units (RCMUs) compliant with the IEC 62109
standard for transformerless solar inverters. The sensors measure residual current to a precision of 1.5% of the nominal residual current of 300 mA and generate an output voltage proportional to the differential current. The AC/DC-sensitive
differential current sensors offer a range of additional functions including sensor a
core demagnetization routine which can be automatically triggered by the supply
voltage or invoked as required. There are two new types with integrated primary
conductors: 4646-X975, with two conductors for single-phase systems, and 4646X976 with four conductors for multiphase systems. Both types provide an inbuilt
test winding.
The continued trend towards higher-power applications for central inverters reflects a growing demand for devices which are capable of detecting increasingly
high current levels. In response to this need, VAC has advanced the superior
functional principle of its traditional current sensors and developed high-current
sensors for currents of 1000 Aeff with a measurement range up to 2500 A. The
new VAC products continue to offer VAC's signature benefits over other existing
solutions, such as high measurement precision and stability, broad measurement
range, outstanding dynamic properties and low power consumption due to a
PWM driver for compensation current. The wide aperture enhances flexibility for
the user when connecting the primary conductor.
Common mode chokes utilising nanocrystalline toroidal tape-wound cores enable highly compact and efficient EMC filters to be produced. Designs with current
ratings exceeding 800 A are available for direct operation in low-voltage grids and
for high DC voltages of up to 1000 V. They are a perfect choice for EMC filters on
the grid side of solar inverters and on the line to the solar panels. In addition to a
comprehensive standard range of 2-, 3- and 4-phase chokes, VAC also offers
individually dimensioned, high-current chokes and core stack assemblies for central inverter systems.
Power transformers based on nanocrystalline ring cores which offer significantly
higher saturation induction (1.2 Tesla) than ferrite cores and low hysteresis losses are available. Advantages include lower weight and volume, enhanced efficiency and extended operating temperature range (up to 120 °C). Power transformers are generally produced as custom designs.
Drive transformers for IGBTs feature low temperature sensitivity over a broad
range from -40 to +105°C and low leakage inductance for high-precision pulse
transmission. VAC drive transformers are also extremely compact, due to their
use of cores with approximately three times the saturation flux density of ferrites.
They are 100 % high-voltage tested, with partial discharge tested to international
standards, and feature high electrical insulation compliant with EN 50178, IEC
62109 or IEC 61800-5-1 standards.
VACUUMSCHMELZE GmbH & Co. KG
VACUUMSCHMELZE (VAC) with 1,500 employees in Hanau, designs, produces and
markets advanced materials, primarily magnetic but also with other physical properties,
and related products. In 1914 the first vacuum furnace laid the foundation for today's
VACUUMSCHMELZE. Industrial vacuum melting techniques for alloys have been in operation since 1923.
VAC Group today achieves annual sales exceeding 490 million euros in over 40 countries
and is the holder of more than 800 patents, placing it among the world’s most highly innovative developers of advanced industrial materials.
VAC’s portfolio comprises a broad array of semi-finished products and parts with superior
magnetic and physical properties, inductive components for electronics, magnets and
magnetic systems for use in a wide variety of fields and industries from watch-making to
medical technology, renewable energies, shipbuilding, installation, and the automotive
and aviation industries. VAC’s custom solutions are developed in close collaboration with
the customer, reflecting the company’s expertise in materials and state-of-the-art production technology.
Find out more at www.vacuumschmelze.com
® = registered trademark of VACUUMSCHMELZE GmbH & Co. KG

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