Line Post Insulator

Catalog No.	Class ANSI	Fig	Height of Middle of Single Cap Screw	Diameter	Mechanical Values (Ultimate)		Packing & Shipping Data			Insulator Coatings	G.W./N.W. (kg)
			Height of Middle of Single Cap Screw	Diameter	Cantilevel Strength		Net Weight Each(Ibs.)	Packed Weight Each (lbs.)	Standard Package Quantity		G.W./N.W. (kg)
			inch	inch	lbs	lbs	lbs	lbs	Standard Package Quantity		lbs
MPI 571S	57-1S	1	-	-	2.800	-	14.3	17.6	4	-	88.18/70.55
MPI 571L	57-1L	2	-	-	2.800	-	14.3	17.6	4	-	88.18/70.55
MPI 572S	57-2S	3	-	-	2.800	-	19.1	23.9	3	-	83.76/66.14
MPI 572L	57-2L	4	-	-	2.800	-	19.1	23.9	3	-	83.76/66.14
MPI 573S	57-3S	4	-	-	2.800	-	26.3	30.6	2	-	92.59/72.75
MPI 573L	57-3L		-	-	2.800	-	26.3	30.6	2	-	92.59/72.75
MPI 5711	57-11	-	10	6-1/2	2.800	1120	16	19	3	Standard
MPI 5712	57-12	-	13	6-1/2	2.800	1120	25	27	2	Standard
MPI 5721	57-21	-	10-1/8	6-1/2	2.800	1120	15	18	2	Standard
MPI 5722	57-22	-	13-1/8	6-1/2	2.800	1120	21	25	2	Standard

Catalog No.	Class ANSI	Fig	Electrical Values (kV)
			Usual Line Voltage	Low-Frequency Flashover		Critical Impulse Flashover Voltage		Radio Influence Voltage Data		Leakage Distance	Dry Arcing Distance
			Usual Line Voltage	Dry/ kV	Wet/ kV	Positive / kV	Negative / kV	Test Volt. To ground / kV	Max. RIV at 1 MHz / V	inch	inch
MPI 571S	57-1S	1	25	80	60	130	155	15	100	7	4.5
MPI 571L	57-1L	2	25	80	60	130	155	15	100	7	4.5
MPI 572S	57-2S	3	35	110	85	180	205	22	100	11-1/2	7.8
MPI 572L	57-2L	4	35	110	85	180	205	22	100	11-1/2	7.8
MPI 573S	57-3S	4	45	125	100	210	260	30	100	14-1/2	7.8
MPI 573L	57-3L		45	125	100	210	260	30	100	14-1/2	7.8
MPI 5711	57-11	-	25	80	60	130	155	16	100	14	6-1/4
MPI 5712	57-12	-	35	110	85	180	205	25	100	22	9-1/2
MPI 5721	57-21	-	25	80	70	130	155	15	100	14	6-1/4
MPI 5722	57-22	-	35	110	80	180	205	22	100	22	9-1/2