| Catalog No. | Class ANSI | Fig | Main Dimensions | Rated Electro mechanical | Mechanical Impact | Time load / kN | |
| D(inch) | H(inch) | ||||||
| MPI 521 | 52-1 | 1 | 6.50 | 5.51 | 44 | 45 | 27 |
| MPI 522 | 52-2 | 2 | 7.99 | 5.75 | 67 | 55 | 44 |
| MPI 523 | 52-3 | 3 | 10 | 5.75 | 67 | 55 | 44 |
| MPI 524 | 52-4 | 4 | 10 | 5.75 | 67 | 55 | 44 |
| MPI 525 | 52-5 | 3 | 10 | 5.75 | 111 | 60 | 67 |
| MPI 526 | 52-6 | 4 | 10 | 5.75 | 111 | 60 | 67 |
| MPI 528 | 52-8 | 3 | 11.81 | 5.75 | 160 | 90 | 107 |
| MPI 529 | 52-9 | 5 | 4.49 | 6.30 | 44 | 45 | 27 |
| MPI 530 | 52-10 | 4 | 11.81 | 6.50 | 160 | 90 | 107 |
| Catalog No. | Class ANSI | Fig | Leakage Distance | Low-Frequency | Low-Frequency | Critical Impulse Flashover Voltage | Radio Influence Voltage Data | ||||
| inch | Dry/ kV | Wet/ kV | Positive / kV | Negative / kV | Test Volt. To ground / kV | Max. RIV at 1 MHz / V | |||||
| MPI 521 | 52-1 | 1 | 7.01 | 80 | 60 | 30 | 100 | 100 | 7.5 | 50 | |
| MPI 522 | 52-2 | 2 | 8.27 | 90 | 65 | 35 | 115 | 115 | 7.5 | 50 | |
| MPI 523 | 52-3 | 3 | 11.50 | 110 | 80 | 50 | 125 | 130 | 10 | 50 | |
| MPI 524 | 52-4 | 4 | 11.50 | 110 | 80 | 50 | 125 | 130 | 10 | 50 | |
| MPI 525 | 52-5 | 3 | 11.02 | 110 | 80 | 50 | 125 | 130 | 10 | 50 | |
| MPI 526 | 52-6 | 4 | 11.02 | 110 | 80 | 50 | 125 | 130 | 10 | 50 | |
| MPI 528 | 52-8 | 3 | 11.02 | 110 | 80 | 50 | 125 | 130 | 10 | 50 | |
| MPI 529 | 52-9 | 5 | 6.732 | 7.5 | 60 | 30 | 100 | 100 | 7.5 | 50 | |
| MPI 530 | 52-10 | 4 | 11.02 | 110 | 80 | 50 | 125 | 130 | 10 | 50 | |