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SUPPORT INSULATORS
29. Make & Type :
30 Insulation Class :
31 Visible corona discharge voltage :
32. Wet 1-Minute power frequency :
flashover voltage (KV rms)
33. Dry 1-Minute power frequency :
flashover voltage (KV rms)
34. 1.2/50 Micro-second impulse :
flashover voltage (in KV peak)
35. Creepage distance to ground :
heavily polluted atmosphere
36. Minimum clearance in air :
a) Between phases (mm) :
b) Live parts and earth (mm) :
c) Live parts to ground level (mm) :
CONTRUCTION FEATURES
37. No. of poles per Circuit Breaker :
38. No. of breaks per pole :
39. Total length of breaks per phase :
(mm)
40. Type of main contacts ;
41. Material of main contacts :
42. Whether main contacts silver :
plated (Yes/No).
43. Thickness of silver coating on :
main contacts(mm).
44. Contact pressure on main contacts :
(Kg/m.sq.)
45. Type of arcing contacts :
46. Contact pressure on arcing :
contacts (Kg/m.sq)
47. Type of auxiliary switches :
48. Material of switch contacts :
49 Whether contacts silver plated :
(Yes/No)
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