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)
Cantilevel Strength  Net Weight Each(Ibs.) Packed Weight Each (lbs.) Standard Package Quantity
mm inch mm inch lbs Kg lbs Kg lbs kg lbs kg   lbs kg
MPI 571S 57-1S 1  -  -  -  - 2.800 1.27  -  - 14.3 6.49 17.6 7.98 4  - 88.18/70.55 40/32
MPI 571L 57-1L 2  -  -  -  - 2.800 1.27  -  - 14.3 6.49 17.6 7.98 4  - 88.18/70.55 40/32
MPI 572S 57-2S 3  -  -  -  - 2.800 1.27  -  - 19.1 8.66 23.9 10.84 3  - 83.76/66.14 38/30
MPI 572L 57-2L 4  -  -  -  - 2.800 1.27  -  - 19.1 8.66 23.9 10.84 3  - 83.76/66.14 38/30
MPI 573S 57-3S 4  -  -  -  - 2.800 1.27  -  - 26.3 11.93 30.6 13.88 2  - 92.59/72.75 42/33
MPI 573L 57-3L    -  -  -  - 2.800 1.27  -  - 26.3 11.93 30.6 13.88 2  - 92.59/72.75 42/33
MPI 5711 57-11   - 254 10 165.1  6-1/2 2.800 1.27 1120 508.02 16 7.257 19 8.62 3 Standard    
MPI 5712  57-12  - 330.2 13 165.1  6-1/2 2.800 1.27 1120 508.02 25 11.34 27 12.25 2 Standard    
MPI 5721  57-21  - 257.18  10-1/8 165.1  6-1/2 2.800 1.27 1120 508.02 15 6.80 18 8.17 2 Standard    
MPI 5722  57-22  - 333.38  13-1/8 165.1  6-1/2 2.800 1.27 1120 508.02 21 9.53 25 11.34 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
  Dry/ kV Wet/ kV Positive / kV Negative / kV Test Volt. To ground / kV Max. RIV at 1 MHz / V mm inch mm inch
MPI 571S 57-1S 1 25 80 60 130 155 15 100 177.8 7 114.3 4.5
MPI 571L 57-1L 2 25 80 60 130 155 15 100 177.8 7 114.3 4.5
MPI 572S 57-2S 3 35 110 85 180 205 22 100 292.1  11-1/2 198.12 7.8
MPI 572L 57-2L 4 35 110 85 180 205 22 100 292.1  11-1/2 198.12 7.8
MPI 573S 57-3S 4 45 125 100 210 260 30 100 368.3  14-1/2 198.12 7.8
MPI 573L 57-3L   45 125 100 210 260 30 100 368.3  14-1/2 198.12 7.8
MPI 5711 57-11   - 25 80 60 130 155 16 100 355.6 14 158.75  6-1/4
MPI 5712  57-12  - 35 110 85 180 205 25 100 558.8 22 241.3  9-1/2
MPI 5721  57-21  - 25 80 70 130 155 15 100 355.6 14 158.75  6-1/4
MPI 5722  57-22  - 35 110 80 180 205 22 100 558.8 22 241.3  9-1/2