Porcelain Pin Insulator: ANSI 56-1

Porcelain insulator includes Suspension type, Pin type, Spool type, Strain/Guy type, Line Post type and Station Post type, which meet IEC, ANSI, AS, BS, etc. standards.

Fig. No.			1	2	2	3	3
ANSI Class			56-1	56-2	56-3	56-4	56-5
Dimension (mm)		H	146	165	191	241	318
		h	50.8	50.8	50.8	50.8	63.5
		D	191	228	267	305	343
		d	34.9	34.9	34.9	34.9	34.9
		R1	19	19	19	19	19
		R2	14	14	14	14	14
Nominal voltage (KV)			23	23	35	46	69
Creepage distance (mm)			330	430	533	685	865
Minimum flashover voltage	Power frequency	Dry (kV)	95	110	125	140	175
	Power frequency	Wet (kV)	60	70	80	95	125
	50% Impulse	Positive (kV)	150	175	200	225	270
	50% Impulse	Negative (kV)	190	225	265	310	340
Radio influence voltage	Test voltage to ground (kV)		15	22	30	30	44
Radio influence voltage	Maximum RIV at 1000kHz/uV		100	100	200	200	200
Low frequency puncture voltage, average (kV)			130	145	165	186	225
Dry arcing distance (mm)			178	210	241.3	285	356
Cantilever failing load (kN)			1134	1360	1360	1360	1360
Net weight, Each, Approx (kg)			3.7	5.3	7	10.8	13.5