ANSI 55series porcelain pin type insulator drawings, images and main technical data are showing as follow:

Type
Creepage distance-mm			102	127	178	229	305
Flashover voltage-kV	Power frequency	Dry	35	45	55	65	80
		Wet	20	25	30	35	45
	50% impulse	Pos.	50	70	90	105	130
		Neg.	70	85	110	130	150
Radio influence voltage	Test voltage to ground-KV		5	5	10	10	15
	Max. RIV at 1000kHz-μv		50	50	50	50	100
Low freq. Puncture voltage-kV			50	70	90	95	115
Dry arcing distance-mm			57	86	114	127	159
Cantilever failing load-lb/KN			3000/13	2500/11	2500/11	3000/13	3000/13

ANSI 56 series porcelain pin type insulator drawings, images and main technical data are showing as follow:

Type
Creepage distance-mm			330	432	533	686	865
Flashover voltage-kV	Power frequency	Dry	95	110	125	140	175
		Wet	60	70	80	95	125
	50% impulse	Pos.	150	175	200	225	270
		Neg.	190	225	265	310	340
Radio influence voltage	Test voltage to ground-KV		15	22	30	30	44
	Max. RIV at 1000kHz-μv		100	100	200	200	200
Low freq. Puncture voltage-kV			130	145	165	185	225
Dry arcing distance-mm			178	203	229	279	356
Cantilever failing load-lb/kN			2500/11	3000/13	3000/13	3000/13	3000/13

Low voltage pin insulator is tested in accordance with ANSI C29.1 standards. The pin insulator drawings, images and main technical data are showing as follow:

ANSI Class
Main dimension, mm	D	80	95	80	95	95
	H	85	89	87	97	100
	D1	42	50	42	50	50
	d	-	-	19	22	22
	d1	16	16	21	24	24
	a	38	43	38	41	41
	b	38	32	30	35	35
	r	17.5	14	9	14	10
Leakage distance, mm		120	140	120	140	130+30
Minimum breaking load, KN		12.5	12.5	12.5	12.5	12.5
One minute with stand voltage wet, kV		10	10	10	10	10
Weight, kg		0.4	0.57	0.4	0.55	0.625

BS porcelain pin Insulator main technical parameters:

Type
Nominal voltage-kV		11	15	22	33	15	22	33
Creepage distance-mm		255	298	432	630	432	673	900
Low frequency voltage-kV	Dry flashover	75	80	110	130	100	125	140
	Wet flashover	50	55	70	95	65	95	110
	Dry withstand	65	70	100	125	90	110	125
	Wet withstand	45	50	65	90	60	90	100
	Puncture	135	150	160	210	140	180	200
Impulse Flashover-kV	Pos.	115	130	175	215	150	190	210
	Neg.	150	175	225	290
Radio influence voltage	Test voltage to ground-KV	15	15	22	30	22	30	44
	Max. RIV at 1000kHz-μv	100	100	100	200	100	200	200
Cantilever failing load-kN		11	11	11	13	11	11	11

AS ceramic pin type Insulator main technical data: