INFORISE NGRs are used to ground the star (neutral) point of transformers or generators in industrial power systems. A neutral grounding resistor limits the fault current to a value which is sufficient enough to operate protective relays and prevent unwanted fault damages.
| Operating voltage: | < 110 kV (line to line) |
| Rated current: | < 5000 A |
Advantages of using NGR:
Protecting transformers or generators from a damage caused by a ground fault by limiting the fault current to a safe value;
Detecting the fault by a current transformer inside the neutral grounding resistor;
Reducing the short-term overvoltages
Increasing safety for personnel
Improving reliability of power system
Increasing lightning protection
Reducing operation/maintenance expenses
