Neutral Grounding Resistor (NGR)
Power Distribution Panels
The CABA-CNR series neutral grounding resistor cabinet is designed for 6–35 kV power distribution networks, providing neutral-point grounding protection. By introducing a grounding resistor, it effectively limits intermittent arc-ground overvoltage, reduces operational and resonant overvoltage, and facilitates the rapid isolation of single-phase ground faults. The resistor elements are made from high-quality imported or domestic stainless-steel alloy materials, offering excellent conductivity, stable resistance, corrosion resistance, high-temperature endurance, and oxidation resistance. These features ensure reliable operation, extend system service life, and enhance operational safety.
Widely used in urban cable distribution networks, large industrial enterprises, factories, airports, ports, subways, and other key power distribution networks, as well as auxiliary power systems in power plants.
DL/T 780-2001, GB 6450, DL/T 620-1997, GB/T 16927.1, GB 1208, GB/T 4208, IEEE 32
| Model | System Rated Voltage (kV) | Short-Time Withstand Current (A) | Duration of Short-Time Current (s) | Nominal Resistance (Ω) |
| | 6.3 | 100 | 10 | 36.40 |
| | 6.3 | 200 | 10 | 18.20 |
| | 6.3 | 400 | 10 | 9.09 |
| | 6.3 | 600 | 10 | 6.06 |
| | 10.5 | 400 | 10 | 15.16 |
| | 10.5 | 600 | 10 | 10.10 |
| | 10.5 | 800 | 10 | 7.57 |
| | 10.5 | 1000 | 10 | 6.06 |
| | 35 | 1000 | 10 | 20.20 |
| | 35 | 2000 | 10 | 10.10 |
- Altitude: Not exceeding 4000 m.
- Ambient Temperature: –40 °C to 65 °C.
- Relative Humidity: ≤95% at 25 °C.
- Installation Location: Air must be free of chemically corrosive gases, vapors, and explosive dust.
- Power Frequency: 48–52 Hz (for 50 Hz systems) or 58–62 Hz (for 60 Hz systems).
- Applicable Environment: Suitable for both indoor and outdoor installation.
- Neutral Point Displacement: Under normal conditions, the neutral point displacement should not exceed 3% of the phase operating voltage.
Note: For special operating conditions, please specify details when placing the order.