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DC Voltage Divider

DC Voltage Divider

Product catalog summary

Overview: The document describes the design and specifications of compensated resistive voltage dividers (RC-Divider) used in high-voltage direct current (HVDC) transmission systems. These dividers are crucial for measuring high DC voltages with high accuracy and stability.

Specifications: The RC-Divider is designed to handle a primary voltage range from 1 kV to 800 kV and a rated current of 1 mA or 0.5 mA. It offers a typical accuracy of 0.4% to 1% measured, with a calculated accuracy of 0.1%. The temperature coefficient is 15 ppm/°C, and the voltage coefficient is 1 ppm/°C. The device maintains long-term stability with an accuracy drift of 0.002% per year.

Design Features: The RC-Divider uses high-precision, low-inductance resistors connected in series, with grading capacitors parallel to the resistors for transient protection and ripple measurement. It features a fast response time and a wide frequency response up to 10 kHz. The divider is available in different configurations, including composite and porcelain insulators, and can be mounted indoors or outdoors.

Testing and Standards: The RC-Divider undergoes various routine and type tests, including resistance and capacitance measurement, DC and AC voltage withstand tests, and impulse voltage tests. Although there is no standard for RC dividers, tests are defined based on experience and customer collaboration.

Applications: The RC-Divider is used for precise voltage measurement in HVDC systems, offering features like long-distance signal transmission, fine calibration, and protection against electromagnetic waves. It supports multiple independent measurements and is insensitive to guided electromagnetic interference.

Contact Information: For further inquiries, contact Trench France SAS or Trench UK, with details provided for phone, fax, and email.

Catalog excerpts

HVDC Divider Compensated voltage divider for HVDC transmission systems

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Composite Insulator with: SF6 Gas Mineral Oil Porcelain Insulator with: Mineral Oil Composite Insulator with: SF6 Gas Mineral Oil Steel tank with: SF6 Gas For measuring of high DC voltage at HVDC-transmission systems, compensated resistive voltage divider (RC-Divider) are in use. This design ensures a wide bandwidth from DC to several kHz with a fast response to voltage changes. The output voltage signal can then be processed individually. The resistive component is made of high-precision low inductance resistors, connected in series according to the primary rated voltage and the defined measuring...

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Technical Data Rated primary voltage range Rated current Typical accuracy Temperature coefficient Voltage coefficient 0.4% to 1% measured 0.1% calculated by means of the separate measured elements Accuracy depending on temp. range Long time stability of the divider accuracy Step response time Maximum length of the divider 9000 mm (Porcelain housing) 9900mm (Composite housing) Shed form according (IEC with max 4.0) Alternated sheds or regular sheds Indoor / Outdoor Mechanical strength (depends on equipment height) Normal application max. horizontal acceleration 0.5g Special application max. horizontal...

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Trench France SAS 16, rue du Général Cassagnou B.P. 80070 F-68302 Saint Louis Cedex, France Phone + 33 3 89 70 23 23 Fax + 33 3 89 67 26 63 E-Mail [email protected] Phone Fax E-Mail Product Manager RC Divider: Christian Weber Phone + 33 3 89 70 35 94 E-Mail [email protected]

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DC Voltage Divider

DC Voltage Divider

Catalog excerpts

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