Product Details
Neutral grounding reactor
Neutral Grounding Reactor Up to 66 kV Operating Conditions Location: Indoor or Outdoor Ambient temperature: -40℃~+50℃ (as per customer requirements) Altitude: ≤3000 meters
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Neutral grounding reactor
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Details
Neutral Grounding Reactor (NGR)
Rated Voltage: Up to 66 kV
Core Functions
Connects between transformer/generator neutral and ground to:
1.Limit ground fault currents (typically 10-2000 A)
2.Protect equipment from arc-flash damage (reduces incident energy by 80%)
3.Suppress transient overvoltages during line-to-ground faults
4.Enable selective grounding for multi-zone protection coordination
Operating Conditions
| Parameter | Standard Specification | Customization Options |
|---|---|---|
| Installation | Indoor/Outdoor | Coastal (C5-M)/Mining (IP67) |
| Ambient Temp | -40℃ to +50℃ | -55℃ to +70℃ (extreme climates) |
| Altitude | ≤3000 m | 5000 m (derating applied) |
| Max Wind Speed | 45 m/s (162 km/h) | 60 m/s (hurricane zones) |
| Humidity | ≤90% (non-condensing) | Condensing environments |
| Seismic | Horizontal: 0.30g Vertical: 0.15g | High-seismic: 0.5g (IEEE 693) |
| Pollution | IEC 60815 Class III | Class IV (heavy industrial) |
Technical Parameters
| Parameter | Standard Range | Precision Options |
|---|---|---|
| System Voltage | 6.6-66 kV | 72.5 kV (BIL 350 kV) |
| Rated Fault Current | 100 A-2 kA (10s-1min) | 5 kA (special duty) |
| Continuous Current | 5-25 A (unbalanced) | 50 A (compensated systems) |
| Reactance Tolerance | ±10% | ±5% (precision-tapped) |
| Insulation Class | Class F (155°C) | Class H (180°C) |
| Temperature Rise | 75K (winding) | Fiber-optic hotspot monitoring |
| Transient Response | <2 cycles to limit voltage | Sub-cycle (<0.5 cycle) design |
| Sound Level | ≤65 dB(A) @ 1m | Silenced: ≤55 dB(A) |
| Resistance Option | — | Integrated monitoring resistor |
DKNC Custom Engineering:
Fault Current Optimization: Adjustable taps ±15%
Retrofit Solutions: Bolt-on kits for existing switchgear
Smart Grounding: Wireless fault location systems
Explosion-Proof: ATEX/IECEx certification for hazardous areas
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Related Solutions
Address: 902-903, Building 1, Yard 15, Xinya Street, Daxing District, Beijing, China
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