Dalian Hivolt Power System Co.,Ltd.
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Professional Porcelain Line Post Insulator 55kV High Voltage N Neck ANSI 57-4
ANSI C29.7 standard porcelain line post insulator 57-4 character :
Product technical performance :
| Technical Specification | Unit | Value | |
| 1 | Total length | mm | 432 |
| 2 | Max. Shed Diameter | mm | 180 |
| 3 | Creepage Distance | mm | 1020 |
| 4 | Cantilever Strength | KN | 12.5 |
| 5 | Power frequency Flashover Voltage | ||
| dry | KV | 150 | |
| wet | KV | 125 | |
| 6 | Critical Impulse flashover Voltage + | KV | 255 |
| 7 | Radio interference voltage test voltage | KV | 44 |
| Max. RIV at 1 MHz | μV | 200 |
HIVOLT line post insulators 57-4 are available for vertical mounting in either tie top design.
the unit is vertical mounting on a crossarm .
HIVOLT line post insulator are one whole piece porcelain without joints . they are free from both radio and television interference without any further treatment. their trim, sturdy sheds enable them to withstand attacks from stones and power arcover .
they are especially useful for service on industrial feeders where maximum reliability is most valuable in providing optimum service continuity.
on the tie top unit ( N Neck) the wide ANSI standard wire groove is provided with a head and neck designed
we can provide short stud or long bolt for insulator assembly .
Applications:
The ANSI 57-4 porcelain line post insulators are used on distrbution lines with voltage up to 55kV. These insulators are commonly installed vertically on metal base to support the
conductor . tie top procelain can hold conductor firmly and suitable for different size of conductors.
Competitive Advantage:
high strength aluminum porcelain C-130 is used for insulation body .
the insulator have very light net weight yet high mechanical strength .
the insulator have excellent self-clean character , much easier for maintenance..
OEM product are available .