Surge arresters OPN-P 6 kV with a discharge capacity of 1.1 C are designed to protect the insulation of electrical installations in 6 kV AC networks with a frequency of 50 Hz and an isolated neutral from switching and lightning overvoltages. They are manufactured according to TU 27.12.10–039–21639232-2020 and comply with GOST R 52725-2021 requirements.

Technical specifications:

• Rated discharge current: 5 kA
• Explosion safety current:
  • duration of at least 1 second: at least 0.6 kA
  • duration of at least 0.2 seconds: at least 40 kA
• Residual voltage at lightning impulse currents of 8/20 µs:
  • at 5 kA: 17.1 kV
  • at 10 kA: 17.9 kV
  • at 20 kA: 20.8 kV
• Residual voltage at switching currents of 30/60 µs:
  • at 250 A: 14.1 kV
  • at 500 A: 14.6 kV
  • at 1000 A: 15.5 kV
• Residual voltage at a steep impulse current of 5 kA and duration of 1/10 µs: 19.8 kV
• Classification voltage at 2 mA current: 7.5 kV
• Thermal energy: at least 4.0 kJ/kV

These arresters provide reliable equipment protection, preventing damage caused by overvoltages, and contribute to the overall reliability of electrical networks.