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LZZB7-35 35kV Epoxy Cast Current Transformer for Switchgear

The LZZB7-35 type current transformer is suitable for power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 35kV, and is used for electric energy metering, current measurement and relay protection.

The product execution standards are GB20840.1-2010 and GB20840.2-2014.

    Model and its meaning

    LZZB7-35.jpg

    Summarize

    In the field of electrical engineering, the importance of current transformers cannot be ignored. These devices play a crucial role in the safe and efficient operation of power systems, especially in indoor environments where high voltage is prevalent. This 15-40.5kV indoor current transformer, designed specifically for energy metering, current measurement, and relay protection, fully embodies the advanced technologies and engineering concepts required to ensure the reliability of power infrastructure.

    This 15-40.5kV indoor current transformer features a fully enclosed epoxy resin casting structure, showcasing its robust and durable design. This structure not only enhances the transformer's durability but also ensures compliance with relevant standards such as GB20840.1-2010 and GB20840.2-2014. These standards are crucial for ensuring the safety and reliability of electrical equipment, especially in high-voltage applications. By adhering to these standards, manufacturers can guarantee that their products meet key performance indicators, thereby increasing user confidence.

    Normal service condition

    Installation location: Indoor, suitable for use in various environments such as power equipment and control rooms to ensure the safe and stable operation of the equipment.

    Ambient temperature: Maximum temperature 40℃; minimum temperature -5℃; daily average temperature not exceeding 30℃, to adapt to climate changes in different seasons and ensure that the equipment works normally under various temperature conditions.

    Atmospheric conditions: The atmosphere is free of severe pollution, ensuring that the equipment operates in a good environment, thereby improving its reliability and service life and reducing the possibility of failure.

    Technical parameter

    Product
    model

    Rated primary
    current

    Accuracy level combination

    Rated
    output

    Rated short-term
    thermal current

    Rated dynamic
    stability current

    LZZB7-35

    15

    0.2/0.5
    0.2/10P10
    0.5/10P15
    0.2/10P10
    0.5/10P10
    10P10/10P10

    15/30
    15/30
    30/30
    15/30
    30/30
    30/30

    2.4

    6

    20

    3.2

    8

    30

    4.8

    12

    40

    6.4

    16

    50

    8

    20

    75

    12

    30

    100

    16

    40

    150

    24

    60

    200

    31.5/1

    80

    300

    400

    500

    31.5/2

    80

    600

    800

    1000

     40/3

    100

    1200

    1500

    2000

    Rated secondary current: 5A or 1A.

    Rated insulation level: 40.5/95/185kV.

    Structure and characteristics

    This type of current transformer is of a fully enclosed structure cast with epoxy resin, featuring excellent insulation performance and moisture-proof capability. This product has a clear outline, an attractive appearance and is easy to clean on the surface. The base plate of the product is equipped with grounding bolts and four installation holes for installation.

    LZZB7-35.jpg