As a reputed porcelain pin type insulator manufacturer, the design of the ANSI 56-4 ceramic pin type insulator or porcelain pin insulators have aimed to produce a theoretically correct insulator as practical as possible.
ANSI 56-4 ceramic pin type insulator design:
The stress on the ANSI 56-4 ceramic pin type insulator under all operating conditions is correspondingly lower than on the thinner types. The critical stress varies with the specific inductive capacity of the material; for porcelain, the safe creepage distance is about 686mm.
The one ANSI 56-4 ceramic pin type insulator or other porcelain pin insulators, as proved by tests, both on normal and high frequency, avoids corona up to limited volts. The manufacturer believes the new unit will insulate permanently, because of its safe dielectric stresses.
The perfectly balanced field is also very important in securing the full value of the insulating material and enabling the insulator to resist high frequency and other line conditions caused by lightning and switching. In the porcelain pin insulator the area of contact with cement outside is six or seven times that in the pin hole, causing a greatly concentrated stress on the porcelain next the pin hole.
ANSI 56-4 ceramic pin type insulator parameters:
Type |
56-4
|
|||
Creepage distance-mm |
mm
|
686
|
||
Flashover voltage-kV |
Power frequency | Dry |
kv
|
140
|
Wet |
kv
|
95
|
||
50% impulse | Pos. |
kv
|
225
|
|
Neg. |
kv
|
310
|
||
Radio influence voltage |
Test voltage to ground-KV |
kv
|
30
|
|
Max. RIV at 1000kHz-μv |
μv
|
200
|
||
Low freq. Puncture voltage-kV |
kv
|
185
|
||
Dry arcing distance-mm |
mm
|
279
|
||
Cantilever failing load-lb/kN |
kn
|
3000/13
|
Orient Power is industry leading pin insulator supplier. The ANSI 56-4 ceramic pin type insulator materials that are used for end fittings are aluminum, steel, malleable cast iron, galvanizing steel and malleable iron casting. These porcelain pin insulators products are available at very reasonable price to our revered clients.
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