all conductive parts are connected to a well-known potential
supported impulse test up to 400 kV
specific insulation design to guarantee the integrity of the unit in the event of overvoltages for atmospheric discharges or switching in the network
high insulations, internal and to ground
high reliability
low working overtemperature
low variation of resistance value at hot condition
These resistors , used together with reactors and capacitors, help to reduce and filter the harmonics. The main characteristics of TELEMA resistors are :
high currents at neutral point
resonances
interferences with radio and phone systems
malfunctioning of the test equipments
increment of losses on the line
The Harmonic Filter resistors are used to eliminate the dangerous distortions (harmonics) generated inside |