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MODISON PRODUCTS

Electrical Contacts For Medium Voltage Application

:: Brazed Arcing Contacts ::

Electron Beam Welding:

Brazed Copper Tungsten with carrier material of Copper/ Copper Alloy/ Brass/ Steel using special purpose brazing alloys. Basically, the copper tungsten is Induction brazed to Copper/Copper alloy/Brass /Steel and the final shape is given.

Material Composition Density Gm/cc Electrical Conductivity m/mm² Hardness HV10
COPTUNS 50 Wcu 50:50 11.8-12.2 37.93 110-140
COPTUNS 60 Wcu 60:40 12.8-13.2 31.48 140-170
COPTUNS 65 Wcu 65:35 13.4-13.8 32.76 150-190
COPTUNS 70 Wcu 70:30 13.9-14.3 31.03 160-200
COPTUNS 75 Wcu 75:25 14.6-15.0 29.31 180-220
COPTUNS 80 Wcu 80:20 15.2-15.6 27.58 210-250
COPTUNS 80S Wcu 80:20 15.2-15.6 24 210-250
COPTUNS 80H Wcu 80:20H 15.2-15.7 27.38 200 min
COPTUNS 85H Wcu 85:15H 15.7-16.4 27.38 205 min
COPTUNS 75H Wcu 75:25H 14.7-15.5 29.31 180 min

S - Special grade with Ni 1.00%

H - High sintered


Applications

(i) Generator circuit breakers

(ii) Load break switches

(iii) Transformer step switches (OLTC= ON LOAD TAP CHANGERS)

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