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Post insulators specifications

Post insulators specifications have many, such as ANSI C29.9 TR series mainly talk about porcelain station post insulators model and some test etc.

Post insulators specifications 

According to ANSI C29.9 4.2, some technical parameters for post insulators

ANSI C29.9 TR no. 202 222 205 208
BIL (basic impulse insulation level) rating, kV, nominal 95 95 110 150
60Hz, wet flashover, kV, rms, nominal 30 30 45 60
Positive critical impulse flashover, kV crest, nominal 105 105 125 170
Leakage distance, in, nominal 10-1/2 10-1/2 15-1/2 24
Four tapped holes, size, in 1/2-13,UFS 5/8-11,UFS 1/2-13,UFS 1/2-13,UFS
Bolt circle diameter, in 3 5 3 3
Height, in, overall 7-1/2 10 10 14
Height, in, tolerance ±1/32 ±1/32 ±1/32 ±1/32
Cantilever strength, lb, ultimate, upright 2000 4000 2000 2000

The designs of post insulators in accordance with Post insulators specifications-IEC
◆ Minimum mechanical up to 40kn
◆ Specific creepage distance 12-55 mm/kV
◆ Core diameter up to 288mm / 113 inch
◆ Max section length upto 2300mm
◆ In accordance with IEC 60815, higher SCD possible in individual cases
◆ Min cantilever failing load moment, routine test load at 70% of min. failing load
◆ Max connection length, depending on firing load

Orient Power can manufacture, design and test post insulators specifications or customer’s requirement or some industry standards.


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