DC Moulded Case Circuit Breakers Ex9MD

DC Moulded Case Circuit Breakers Ex9MD TM are intended mainly for photovoltaic applications as a main switch and current protection of DC part of photovoltaic power plants, but they can be used also in industry. Testing according to IEC / EN 60947-2 standards ensures functions and reliability for wide variety of applications including isolation.

These breakers are offered with thermomagnetic releases, in 3 and 4-pole versions with breaking capacities from 25 kA up to 100 kA. Rated impulse withstand voltage Uimp 8 kV makes it possible to use them even in system with occurences of transient overvoltage waves of high intensity.

All frame sizes can be fitted with varying accessories including auxiliary and signal contacts, under-voltage and opening releases, rotary handles, motor actuators and others.

  • Frame sizes M1 - M5
  • Rated current up to 800 A
  • 3 and 4-pole versions
  • Rated ultimate short circuit breaking capacity Icu up to 100 kA, Ics = 100 % Icu
  • Rated voltage 750 V DC (3-pole) and 1000 V DC (4-pole)
  • Thermomagnetic releases
  • Fixed version