| Class ANSI | Main Demension in( mm) | Leakage Distance in (mm) | Min.Pin Length in (mm) | Cantilever Strength 1b (KN) | Flashover Voltage | Powe Frequency Puncture voltage KV | Radio Influnce Voltage | ||||||
| D (max) | H | h | Power Frequency | Critical impulse | Test Voltage To Ground KV | Max Riv At 1 MHz V | |||||||
| Dry KV | Wet KV | Positive KV | Nagative KV | ||||||||||
| 56-1 | 31/4 (83) | 31/2 (89) | 13/4 (44) | 4 (102) | 4 (102) | 3000 (13) | 35 | 20 | 50 | 70 | 50 | 5 | 2500/50 |
| 56-2 | 33/4 (95) | 31/4 (83) | 11/2 (38) | 5 (127) | 5 (127) | 2500 (11) | 50/45 | 25 | 75/70 | 95/85 | 70 | 5 | 2500/50 |
| 56-3 | 43/4 (121) | 33/4 (95) | 11/2 (38) | 7 (178) | 7 (178) | 2500 (11) | 65/55 | 35/30 | 100/90 | 130/110 | 90 | 10 | 5500/50 |
| 56-4 | 51/2 (121) | 43/8 (111) | 13/4 (44) | 9 (229) | 9 (229) | 3000 (13) | 70/65 | 40/35 | 110/105 | 140/130 | 95 | 10 | 5500/50 |
| 56-5 | 7 (178) | 47/8 (234) | 2 (51) | 34 (864) | 34 (864) | 3000 (13) | 85/80 | 45 | 140/130 | 170/150 | 115 | 15 | 800/100 |
Here are some key points:
1.ANSI Class 56-3 Porcelain Insulator:
1)These insulators are used in medium voltage distribution lines and overhead distribution substations.
2)They are designed to withstand adverse environmental conditions, including sea breezes and chemical elements present in industrial areas.
3)Key specifications include:
(1)Diameter (D): Approximately 10-1/2 inches (267 mm).
(2)Height (H): About 7-1/2 inches (191 mm).
(3)Leakage Distance: 21 inches (533 mm).
(4)Dry Arcing Distance: 9-1/2 inches (241 mm).
(5)Minimum Pin Height: 8 inches (203 mm).
(6)Cantilever Strength: 3,000 lb (13 kN).
2.Mechanical Values:
1)Cantilever Strength: 3,000 lb (13 kN).
