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Neutral Grounding Resistor Cabinets — NGR Panels
Neutral grounding resistor (NGR) cabinets limit earth fault current by connecting a resistor between the system neutral and ground, protecting generators and transformers from fault damage while allowing selective protection. Rated 6–35 kV, 10–2000 A fault current limitation, with monitoring and alarm provisions.
Applications
Generator neutral grounding
Transformer neutral grounding
Industrial medium-voltage systems
Data center and renewable plant grounding
Key Features
- Limits earth fault current to a defined level
- 6–35 kV, 10–2000 A fault current ratings
- Protects generators and transformers
- Allows selective earth-fault protection
- Temperature and ground-fault monitoring
- NEMA/IP54 enclosure options
Selection Guide
Fault current
Select the limiting current based on protection sensitivity and equipment rating.
Voltage
Match 6–35 kV system voltage and grounding scheme.
- Frequently Asked Questions
What is a neutral grounding resistor?
An NGR connects the system neutral to ground through a resistor, limiting earth fault current to a defined level that allows selective protection while reducing fault damage.
Why not solid grounding?
Solid grounding allows very high fault currents; an NGR limits the current to protect equipment and enable safe detection.
Instant Selection & Quote Calculator
Select your specifications to get an estimated price instantly.
| Base price (interpolation) | $69 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
Reference prices are for estimation only and do not constitute a formal offer.
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