Neutral Grounding Resistors for Generator & Transformer Protection
MEGI Consultancy — a U.S.-based brand — supplies neutral grounding resistors (NGR) for LV and HV power distribution systems worldwide. Every solution matched to system voltage, fault current, and application requirement.
Earth Fault Protection for Generators & Transformers
Over 90% of short circuits in power distribution systems are phase-to-ground faults. Without proper neutral grounding, these faults expose generators, transformers, cables, and motors to destructive fault currents — causing equipment damage, unplanned downtime, and safety hazards.
Neutral grounding resistors solve this by connecting the neutral point of a transformer or generator to ground through a controlled resistance — limiting fault current to a safe, manageable level while enabling fault detection through current transformers and relays.
MEGI Consultancy supplies neutral grounding resistors (NGR) for LV and HV power systems worldwide, with enclosure options from IP00 to IP55 for indoor and outdoor installation.
GR Series at a Glance
Neutral Grounding Resistor
NGRs connect the neutral point of power transformers and generators to ground through a controlled resistance — limiting earth fault current and protecting equipment from thermal and mechanical damage while enabling fault detection.
Key Technical Features
- Controlled earth fault current limitation
- Custom resistance and current ratings
- Heavy-duty, corrosion-resistant construction
- High thermal withstand capability
- Optional monitoring and alarm integration
General Specifications
- System voltages up to 110/√3 kV
- Earth fault currents up to 5,000 A
- Fault duration: 5s, 10s, continuous or custom
- Stainless steel resistor materials — oxidation & corrosion resistant
- Integrated CT for earth fault current monitoring and detection
- Enclosure protection: IP23 / IP54 / IP55
- Control modes: Manual / Automatic / Remote
- Installation: Indoor & Outdoor
Enclosure & Construction Options
- Hot dip galvanized (standard) / stainless steel / aluminium enclosure
- Cable entry from bottom (standard), top or side with bushings
- Spring wound, edge wound, grid type resistor elements
- Custom lifting eyes for safe installation
Accessories Available
- Current & voltage transformers
- Disconnector switch
- Surge arrester
- Protective relays
- Anti-condensation heater
Project-Based Supply — Not Just a Catalog
Neutral grounding is a protection-critical specification. The wrong resistance value, incorrect IP rating, or missing accessories can result in equipment damage or failed protection coordination. MEGI Consultancy works with each project individually — from system voltage and fault current through to enclosure, accessories, and export documentation.
- NGR — full range of voltage classes and enclosure options
- Custom voltage class — LV through 110/√3 kV
- Enclosure IP00 to IP55 — indoor and outdoor rated
- Accessories coordinated — CT, relay, disconnector, heater
- IEEE-C57.32, IEC 60076-25, IEC 62271-200 certified
- Export documentation — full international supply
- U.S.-based brand — direct communication, no middleman
"Neutral grounding is a protection-critical decision — not a commodity purchase. We specify the right resistance value, fault duration, voltage class, and enclosure for each system. If your requirement doesn't fit a standard configuration, we coordinate custom production."
— MEGI CONSULTANCY
Custom or Non-Standard Project?
Special voltage class, ATEX rating, unusual fault duration, or a complete generator protection package — contact us with your full specification. We coordinate custom production to match your exact requirement.
Discuss Custom ProjectWhere Neutral Grounding Resistors Are Used
Frequently Asked Questions
Need a Neutral Grounding Resistor for Your System?
Send us your system voltage, fault current requirement, application type, and destination country. We will confirm the right neutral grounding resistor specification for your project.
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