Class ANSI
33KV Pin type porcelain insulator for high voltage lines
Color : Brown
Excellent quality, reasonable price, prompt delivery
ANSI Class
|
With long stud
|
57 -1L
|
57-2L
|
57-3L
|
57-4L
|
With short stud
|
57-1S
|
57-2S
|
57-3S
|
57-4S
|
Leakage distance/in mm
|
14 356
|
22 559
|
29 737
|
1015
|
Dry arcing distance/in mm
|
6 1/2 165
|
9 1/2 241
|
12 1/4 311
|
368
|
Cantilever strength/lb kN
|
2800 12.5
|
2800 12.5
|
2800 12.5
|
12.5
|
Fig. No
|
1
|
2
|
3
|
4
|
Average flashover voltage
|
Low-frequency
|
Dry/kV
|
80
|
110
|
125
|
150
|
Wet/kV
|
60
|
85
|
100
|
125
|
Critical-impulse
|
Positive/ kV
|
130
|
180
|
210
|
255
|
Negative/ kV
|
155
|
205
|
260
|
340
|
Radio-influence voltage date
|
Test voltage to Ground/ kV
|
15
|
22
|
30
|
44
|
Maximum RIV at 1.000kc/μV
|
100
|
100
|
200
|
200
|
For ANSI Class
|
57-1S
|
57-1L
|
57-2S 3S 4S
|
57-2L 3L 4L
|
Main dimensions steel stand mm
|
A
|
1 3/4 44.5
|
7 178
|
1 3/4 44.5
|
7 178
|
B
|
1 7/16 36.5
|
4 1/2 114
|
1 7/16 36.5
|
4 1/2 114
|
C
|
1 7/32 31.0
|
1 7/32 31.0
|
1 7/32 31.0
|
1 7/32 31.0
|
D
|
3/4
|
3/4
|
3/4
|
3/4
|
E
|
5/8
|
5/8
|
3/4
|
3/4
|
|
|
|