electric post insulators,electrical post insulators,porcelain post insulators

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News: The effect of ceramic insulator in transmission line

Ceramic insulators in the transmission line effect, ceramic insulator commodity butterfly insulator with a needle type insulator is mainly used for hi...

Introduction of Line Insulators,Rod insulator,Disc-shaped insulator

Line insulator is used to refer to the transmission line conductors insulated box fixed insulator, insulators for high voltage transmission line has a...

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waiting at the airport for a long time they received the afternoon Minqing arrived, they asked me very puzzled, "Do you have a road traffic regulation...

Contact Us: Fuzhou Lingt Trading Co.,Ltd.
Tel:+86-591-87618322
Fax:+86-591-83965269
E-mail:william@fjever.com
Skype:86 15359012365

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line post insulators are manufactured and tested to the requirements of ANSI Standard C29.7
Color:brown and gray

MAIN DIMENSTIONS AND STANDARD PARTICULARS

ANSI Class	With long stud			57 -1L	57-2L	57-3L	57-4L
ANSI Class	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
	Low-frequency		Wet/kV	60	85	100	125
	Critical-impulse		Positive/ kV	130	180	210	255
	Critical-impulse		Negative/ kV	155	205	260	340
Radio-influence voltage date	Test voltage to Ground/ kV			15	22	30	44
Radio-influence voltage date	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

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Fuzhou Lingt Trading Co., Ltd.

Tel:15359012365

Contact Person:William

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line post insulator