Resistance wire is wound on Ceramic Insulator to form a Coil for Wire wound
Mapping can be taken at any place
Resistance Wire is wound on Ceramic Insulator to form a Coil for Wire wound
Tapping can be taken at any place
These Resistors are economical for low current
Available in ratings of 1Amp and above
Dissipation is negligible the temperature rise for the resistor element depends on its capacity to store the energy generated in proportion to the mass specific heat of the material used. These NGRS are connected between the neutral point of transformer/generator the earth.
In Earth, fault condition the Restricted earth fault current passes through the Metallic Resistor protecting the system till automatic protection takes place by absorbing the earth
Line to neutral voltage rate
Normally Full load current rate is same
Initial current flow through resistors when it is cold
Time length rate for NGR must tolerate rated voltage.
NGR construction includes resistor assembly, internal connections, plus required insulators, etc.