HomepageAbout usLD BrandE-mail                                     ld-.gif (616 字节)

LINE   POST  INSULATORS

　

    Line post insulators can be used to replace the pin type insulators in a position to reinforce the operational voltage and mechanical strength of the insulators. Itis used for insulators and suppor- ting conductors. There are two versions,tip top conductor binding and clamp top with vertical or horizontal mounting.
    The company can supply various line post insulators in accordance with IEC, ANSI, AS, and JIS etc. They can also design and make insulators differing in construction and creepage distance.
    The glaze colour of the insulators is generally brown . The light grey can also be supplied.

ANSI
ANSI
Class		 Fig. Main dimension
in.		 Creepage
distance
in.		 Dry arcing
distance
in.		 Cantilever
strength
lb		 Lightning impulse
flashover voltage
kv		 Power frequency
flashover voltage
kv
 Radio infuence
voltage
H D d Positive Negative Dry Wet Test voltage
to ground
kv		 Maximum RIV
at 1MHz
uv
57-1S
57-1L		 1 83/4 51/2 4 14 61/2 2800 130 155 80 85 22 100
57-2S
57-2L		 1 12 6 4 22 91/2 2800 180 205 110 85 22 100
57-3S
57-3L		 1 141/2 61/2 41/2 29 121/2 2800 210 260 125 100 30 200
57-11S 2 10 6 4 14 61/2 2800 130 155 80 60 15 100
57-12L 2 13 61/2 41/2 22 91/2 2800 180 205 110 85 22 100
57-13L 2 161/2 63/4 41/2 29 121/4 2800 210 260 125 100 30 200

Note: Dimensions of head are in accordance with IEC standard (Fig.3)
Fig.1 Fig.2 Fig.3
Kind of cross-arm Steel Wood Steel Wood
A
    Dimensions B
    mm C
D
E
45 178 45 178
37 89 37 89
31 31 31 31
M20 M20 M20 M20
M16 M16 M16 M20
For ANSI Class 57-1S 57-1L 57-2S.3S 57-2L.3L

NANJING  ELECTRICITY   (GROUP)  Co.,  Ltd.
NANJING  ELECTRO-CERAMIC  FACTORY
-------------------------------------------------------------------------
Add:    Yanziji  Nanjing  China                              Zip: 210038
Tel(Fax): (86)-25-5311532   5312093   5310592   5311634
E-mail (For sale): necf@ld-cn.com     or    (For office): gsb@ld-cn.com