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  • Product description and use method:

    ZL-20 / 16 indoor jointed pillar insulator

    I. Overview of indoor pillar insulators

    Indoor pillar insulators are used in indoor power stations with a rated voltage of 6 ~ 35kV, substation power distribution devices and electrical equipment to insulate and fix conductive parts.
    Insulators are suitable for ambient temperatures ranging from -40 ° C to + 40 ° C. The altitude of the installation site does not exceed 1000m for ordinary types and the height of the prototype does not exceed 4000m.
    According to the structure of the insulator, the insulator is divided into three types of structure: the outer glue, the inner glue and the joint glue. The insulators are classified according to the rated voltage and bending strength grade as follows:

    Rated voltage

    kV

    Bending strength kN

    Outer plastic

    Inner plastic

    United rubber

    6

    7.5 3.75 , 7.5

    4

    10

    7.520 3.75 , 7.5 , 20

    (7)816 4 , (7) , 8 , 16

    4

    20

    20

    30

    35

    (7.5)

    (7.5)8 4 , (7.5) , 8

    Note: () in the table indicates non-standard grade


    Brief introduction of insulator structure

    The insulator is made of porcelain and the upper and lower metal accessories are glued together with an adhesive. The end parts of the porcelain parts and the metal parts of the plastic parts are fitted with elastic pads. The plastic parts of the porcelain parts are sanded, knurled, and grooved to ensure mechanical strength and prevent loosening and twisting. The surface of the porcelain pieces is evenly white-glazed, and the surface of the metal accessories is painted with gray magnetic paint.
    The main structure of insulator porcelain has two types of cavity partition (breakable) structure and solid (non-breakable) structure. Joint glued post insulators are generally solid, non-breakable structures. The latter structure improves the safety and reliability and reduces the maintenance and testing workload compared with the former structure.
    There are two types of insulator ceramics: polygonal or less angular. Polygonal shape increases the creepage distance and its electrical performance is better than less prismatic. Except for the outer plastic pillar insulators that will be phased out, the rest of the products are polygonal.
    The inner glued structure, because the metal attachment is glued into the hole of the porcelain, correspondingly increases the insulation distance, improves the electrical performance, and also reduces the space occupied by the installation. However, because the inner glue is not good for improving the mechanical strength, Insulators that require high mechanical strength should be combined with rubber (that is, the upper attachment is inner rubber, and the lower attachment is outer rubber).

    Third, technical standards

    Indoor pillar insulators are manufactured according to the national standard GB8287.1 ~ 8287.2 "High-voltage pillar porcelain insulators".

    4. Model description

    Z——Indoor and outdoor plastic pillar insulators;
    ZN——Indoor glued pillar insulator;
    ZL——Indoor jointed pillar insulator;
    For outer rubber pillar insulators, the letter L in front of the dash indicates a polygonal shape, and the letters A, B, and D indicate mechanical damage loads of 3.75, 7. 5, 20kN, respectively. Fraction after letter, numerator indicates rating

    Voltage kilovolt, denominator is the number of mechanical damage load kN.
    N——The upper and lower attachments of the inner rubber are single screw holes;
    Y——The outer attachment and the lower attachment of the joint installation are round;
    T——The outer part of the outer package is oval;
    F——The bottom of the outer package is square;
    G——high prototype (old product is GY)


    Five, appearance and installation dimensions

    model

    Drawing number

    The main size mm

    Weight kg

    H

    D

    h1

    h2

    h3

    h4

    h5

    d

    d / b

    d3

    d4

    d5

    a1

    a2

    ZL-10 / 4G

    10-11

    210

    90

    -

    60

    18

    -

    15

    70

    112

    2-M8

    -

    φ 14 2- φ 14

    18

    145

    5.4

    ZL-20 / 30

    10-14

    290

    160

    -

    110

    -

    30

    25

    105

    250

    -

    M20

    φ 18 4- φ 18

    -

    250

    24.6

    ZL-35 / 4Y

    10-12

    380

    90

    -

    60

    8

    20

    25

    62

    114

    2-M8

    M10

    M16

    36

    -

    6.2

    ZL-35 / 4

    10-13

    380

    90

    -

    60

    8

    20

    15

    62

    112

    2-M8

    M10

    φ 14 2- φ 14

    36

    145

    7.5

    ZL-35 / 8

    10-14

    400

    110

    -

    65

    12

    25

    14

    68

    160

    2-M10

    M16

    φ 14 4- φ 14

    46

    180

    11.2

    ZLA-35GY

    10-13

    445

    100

    -

    64

    8

    20

    14

    62

    120

    2-M8

    M10

    φ 12 2- φ 12

    36

    150

    9.3

    ZLB-35GY

    10-14

    445

    125

    -

    70

    12

    25

    14

    68

    -

    2-M10

    M16

    φ 14 4- φ 14

    46

    180

    11.4

    ZL-35 / 4G

    10-14

    535

    110

    -

    65

    12

    25

    18

    68

    -

    2-M10

    M16

    φ 14 4- φ 14

    46

    180

    14.0

    model

    Rated voltage kv

    Power frequency voltage kv rms

    Full-wave impulse withstand voltage kv peak

    Bending and tensile failure load kn

    Applicable altitude m

    Dry tolerance

    breakdown

    ZL-10 / 4G

    10

    67

    107

    114

    4

    ~ 4000

    ZL-20 / 30

    20

    68

    -

    121

    30

    ~ 1000

    ZL-35 / 4Y

    35

    110

    -

    195

    4

    ~ 1000

    ZL-35 / 4

    35

    110

    -

    195

    4

    ~ 1000

    ZL-35 / 8

    35

    110

    -

    195

    8

    ~ 1000

    ZLA-35GY

    35

    138

    -

    244

    4

    ~ 3000

    ZLB-35GY

    35

    138

    -

    244

    7.50

    ~ 3000

    ZL-35 / 4G

    35

    157

    -

    279

    4

    ~ 4000

    Product number

    Factory code

    Drawing number

    The main size mm

    Bending failure load KN

    Power frequency dry withstand voltage KV

    Lightning impulse withstand voltage KV

    Reference weight kg

    H

    D

    d1

    d2

    a

    b

    ZL-10 / 4

    P2221

    1

    160

    72

    M10

    12

    130

    /

    4

    42

    75

    2.2

    ZL-10 / 8

    P2222

    1

    170

    86

    M16

    14

    145

    /

    8

    42

    75

    4.6

    ZL-10 / 16

    P2223

    2

    185

    110

    M16

    14

    /

    180

    16

    42

    75

    6.1

    ZL-20 / 16

    P2224

    2

    265

    125

    M16

    14

    /

    210

    16

    68

    125

    15.2

    ZL-20 / 30

    P2225

    2

    290

    160

    M20

    20

    /

    250

    30

    68

    125

    20

    Six, ordering instructions

    1. Specify the model and factory code when ordering.
    2. The drawing numbers are for reference. There are porcelain pieces with umbrella skirts with nominal creepage distances indoors.

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