High voltage high energy non-inductive resistor RC over-voltage absorption circuit resistor
The high voltage high energy non-inductive resistor is assembled using high-energy ceramic resistor chips. It features a compact size, lightweight, and excellent characteristics for high energy and high temperature, which are unattainable by general-purpose resistors. Additionally, it has good heat dissipation, sealing, and protection properties. It is mainly used in circuits that require the discharge of large pulse energy in a short period, such as ZR resistor-capacitor over-voltage absorbers, capacitor charge and discharge circuit resistors, grounding resistors for neutral points in power supply networks, and RC over-voltage absorption circuit resistors.
The prominent advantages of this resistor are its large energy and thermal capacity, high temperature resistance, and strong capability to withstand high energy impacts for short duration’s, although it is not suitable for prolonged or continuous operation. It has a high energy tolerance, is non-inductive, withstands high voltage, is compact, and maintains stable performance over many years of use without easily failing. It has low thermal mass, is corrosion-resistant, moisture-resistant, and vibration-resistant.
1. **High energy tolerance**: It can absorb energy approximately four times more than that of clay carbon black ceramic resistors in a very short time per cubic centimeter. 2. **Non-inductive**: The conductive body of the resistor has an inductance value close to zero. 3. **High voltage resistance**: It can be applied in ultra-high voltage and extra-high voltage transmission systems. 4. **Compact size**: At the same power rating, its volume is 1/4 to 1/105 that of metal resistors and clay carbon black ceramic resistors. 5. **Stable performance**: Over long-term use, the resistance value of clay carbon black ceramic resistors can change by more than 1000 times, while this product’s change rate remains within the design range and is very small.
**Main technical parameters**: 1. Short-term energy tolerance: 800 J/cm³ 2. Inductance: <0.4 µH 3. Linearity: ≤1.12 4. Temperature coefficient: (2~7) x 10^-5 5. Change rate of resistance value after thermal treatment in the atmosphere: -2% 6. Resistance values: 5 Ω to 2 MΩ, can be customized between 10^-1 to 10^2 MΩ as per user requirements for 0.1 to 3 kΩ resistors. 7. Operating temperature: - Ambient temperature: -40 to +80℃ - Resistor body temperature: ≤500℃ (performance remains unchanged) 8. Material specific heat: 2.6 J/cm³ 9. Moisture resistance: Can be used normally in humid environments (or in water or oil). 10. Vibration resistance: Due to the high strength of the product, it can be used in vibrating environments.
**Typical Applications**
Due to the high thermal power capacity of zinc oxide (ZnO) ceramic linear resistors, they are primarily used in power grids to quickly absorb instantaneous surges, reduce the steepness of noise pulses, and protect electrical equipment safety.
- Power resistors for neutral grounding in generators, substations, and transformers. - Resistors used in wind turbine generators. - High voltage resistors for high voltage isolating switches. - Resistor-capacitor absorption resistors for thyristor protection circuits and IGBT (Insulated Gate Bipolar Transistor) protection resistors. - Power resistors for energy-consuming braking. - Resistors for medium frequency inverter welding machines. - High power load simulation resistors. - Charge and discharge resistors / protective grounding resistors for power equipment. - Load resistors / high voltage resistors / braking resistors. - Braking resistors for electric traction vehicles, elevators, cranes, and various frequency converter braking resistors. - High voltage equipment overvoltage protection resistors, damping resistors in parallel with the main contacts of high voltage circuit breakers, and electrical equipment requiring instantaneous high current and high thermal power resistors. - Power resistors for aerospace heating elements.
