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  • CV

    CV

    CV

    Type CV is a typical selector switch structure tap changer, an ideal solution for medium power transformers (up to 110kV) down to distribution transformers. Its compact size allows transformers designers to achieve the most optimal tank design.

    Item

    Specification

    CVIII350Y

    CVIII350D

    CV350

    SVIII500Y

    SVIII500D

    CV700

    1

    Max. rated through-current (A)

    350

    500

    700

    2

    Rated frequency (Hz)

    50 or 60

    3

    Number of poles

    3

    3

    1

    3

    3

    1

      4

    Connection

    Y-in the neutral, D and single pole-in any part of the winding

    5

    Max. rated step voltage (V)

    10 contacts

    1500

    1500

    1500

    12 contacts

    1400

    1400

    1400

    14 contacts

    1000

    -

    1000

    6

    Rated step capacity (kVA)

    10 contacts

    525

    400-525*

    660

    12 contacts

    420

    325-420*

    520

    14 contacts

    350

    -

    450

    7

    Short-circuit

    current test (kA)

    Thermal (3s)

    5

    7

    10

    Dynamic (Peak)

    12.5

    17.5

    25

    8

    Max. Operating Positions

    Without change-over selector

    14

    12

    14

    With change-over selector

    27

    23

    27

    9

    Insulation

    to ground

    (kV)

    Highest voltage for

    equipment Um

    40.5

    72.5

    Rated separate source AC

    withstand voltage (kV/50Hz,1min)

    85

    140

    Rated lightning impulse

    withstand voltage (kV,1.2/50μs)

    225

    350

    10

    Internal Insulation Level

    Refer to Technical Data section 4.6

    11

    Mechanical life

    Not less than 800,000 operations

    12

    Contact life

    Not less than 200,000 operations

    13

    Oil compartment of diverter switch

    Service pressure

    0.03Mpa

    Leakage test

    No leakage under 0.08Mpa for 24 hours

    Over pressure protection

    Bursting cap busts at 300 ± 20%kPa

    Protection relay

    Oil flow speed set at 1.0m/s ±10%

    14

    Motor drive unit

    SHM-D or CMA7

    15

    Oil filter plant

    ZXJY-1 / ZXJY-2 / ZXJY-3 according to requirement (Necessary when max. rated through current is 1000A and above or OLTC used for industrial applications)


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