Specification of NER 20 Kv 25 Ampere 500 Ohm
NEUTRAL GROUNDING RESISTORS (NGR) 20 Kv 25 Ampere 500 Ohm
TECHNICAL SPECIFICATIONS
20 kV 25 Ampere 500 Ohm, 10~30 second
IP 23 (max IP 54)
Resistor Material : Wirewound
Enclosure: custom, Galvanize Steel, Mild Steel, Stainless Steel
Including NCT
ENCLOSURE
The frame enclosure must be made of structural steel, all corners are welded, or bolted with stainless-steel hardware. The top of the enclosure should be solid, slightly outward and at a slight angle. An eyebolt must be attached for lifting purposes. The front of the enclosure must be ventilated with holes in the form of a grille. The sides of the four sides must be bolted. Nameplate permanently attached to either side shall show the complete manufacturing and rating.
RESISTOR
• Resistive elements must be low temperature coefficient. The stainless steel mass grade resistors are sufficient to withstand the prescribed duty.
• Resistors must be installed in a stainless steel support frame.
• The entire resistor assembly must be mounted on an insulator appropriate to the system voltage.
• All resistor terminals and interconnections between resistor units must be stainless-steel using stainless-steel hardware including lock washers.
