Line post insulators can be used to replace the pin type insulators in a position to reinforce the operational voltage and mechanical strength of the insulators. It is used for insulators and suppor- ting conductors. There are two versions, tip top conductor binding and clamp top with vertical or horizontal mounting.
    The company can supply various line post insulators in accordance with IEC, ANSI, AS, and JIS etc. They can also design and make insulators differing in construction and creepage distance.
    The glaze colour of the insulators is generally brown . The light grey can also be supplied.

ANSI

ANSI Class	Fig.	Main dimension in.			Creepage distance in.	Dry arcing distance in.	Cantilever strength lb	Lightning impulse flashover voltage kv		Power frequency flashover voltage kv		Radio infuence voltage
		H	D	d				Positive	Negative	Dry	Wet	Test voltage to ground kv	Maximum RIV at 1MHz uv
57-1S 57-1L	1	83/4	51/2	4	14	61/2	2800	130	155	80	85	22	100
57-2S 57-2L	1	12	6	4	22	91/2	2800	180	205	110	85	22	100
57-3S 57-3L	1	141/2	61/2	41/2	29	121/2	2800	210	260	125	100	30	200
57-11S	2	10	6	4	14	61/2	2800	130	155	80	60	15	100
57-12L	2	13	61/2	41/2	22	91/2	2800	180	205	110	85	22	100
57-13L	2	161/2	63/4	41/2	29	121/4	2800	210	260	125	100	30	200

Note: Dimensions of head are in accordance with IEC standard (Fig.3)

Fig.1

Fig.2

Fig.3

Kind of cross-arm	Steel	Wood	Steel	Wood
A     Dimensions B     mm C   D   E	45	178	45	178
	37	89	37	89
	31	31	31	31
	M20	M20	M20	M20
	M16	M16	M16	M20
For ANSI Class	57-1S	57-1L	57-2S.3S	57-2L.3L