Neutral grounding resistor

NGR / NER is used to ground the neutral of Transformer / Generator to limit prospective ground fault current to a predetermined safe value. The NGR avoids transient over voltage and gives system stability under fault conditions.

Technical Specification:

• Range : 230 V to 66 kV / 8000A
• Degree of protection : IP00 to IP65
• Service : Indoor / Outdoor / Suitable for Highly polluting and corrosive atmosphere
• Enclosure Finishing : Epoxy powder coat painted / Galvanized / Stainless steel (AISI 304 / 316)
• Mounting type : Floor / Steel Structure Mounted
• Duration : 5/10/15/30/60 Sec or Continuous
• Frequency : 50 / 60 Hz
• Standard followed : IEEE - 32
• Termination : Through outdoor porcelain bushing/ cable box
• Types of elements used : Stamped plates / Wire wound / Frame wound / Cast Iron / Edge wound
• Resistive elements : Stainless steel (Cr – Ni) / Cr – Al alloy (AISI 416)
• Optional accessories : CT / Monitoring Relay / Protection Relay / Space heaters / Vacuum contactor / Disconnector (Motorized/Manual) for Isolation or Changeover/ Zig zag Transformers
• Generator Protection : Single or multiple Generators with Interlock / High resistance Grounding / Through Neutral Grounding Transformers / Disconnector or vacuum contactor Up to 11 kV
• Maximum Temperature : 790°C
• Ambient Temperature : 55°C
• Range : 230 V to 66 kV / 8000A

Why National Switchgears?

National Switchgears was founded with very purpose of manufacturing high quality resistor for various industrial and research applications in India.

We serve the best work

We are the first company to export NGR from India. Almost all leading consultants in India and well known consulting firms in abroad have approved our NGR.

Best quality

Best Price

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