These Langir DC circuit breakers are perfectly suited for multi string photovoltaic installations. These DC circuit breakers are designed for solar/PV system protection, located between the solar panels and the inverter, helping prevent against overloads and short circuits (see application diagram). Combined with a switch, the 40a DC Circuit Breaker will be installed in a string PV protection enclosure at the end of each string of photovoltaic modules. It can be locked (by a padlocking device) in OFF position as a safety measure for removal of the PV inverter. Since a fault current can flow in the reverse direction to the operating current, the Circuit breaker can detect and protect against any bidirectional current. To ensure the safety of the installation, it is necessary, depending on the various types of application, to combine the circuit breaker with:
• a residual current device at the AC end,
• a fault passage detector (insulation monitoring device) at the DC end
• an earth protection circuit breaker at the DC end
In all cases, fast action on site will be required to clear the fault (protection not ensured in the event of a double fault). Langir DC Circuit breakers are not polarity sensitive: (+) and (-) wires can inversed without any risk. The circuit breaker is: delivered with three inter-pole barrier to provide increased isolation distance between two adjacent connectors. Set up your solar pv system protection today.
Package Content:
1 x DC Circuit Breaker
Main Characteristics
Operating voltage (Ue):1P=250 V DC, 2P=500 V DC
3P=750 V DC, 4P=1000 V DC
Rated insulation voltage (Ui): 1,000 V DC
Breaking capacity (Icu):10 kA
Impulse voltage (Uimp): 4 kV
Electrical connection: By the bottom for In and Out
Number of poles: 1P, 2P, 3P, 4P
Standards : IEC 60947-2/ EN 60947-2
Technical Data
Rated service breaking capacity(lcs): 100% of the lcu
Endurance(O-C) Electrical: 1500 cycles(where L/R=2 ms)
Endurance(O-C) Mechanical: 20000 cycles
Mechanical: 20000 cycles
Degree of pollution: 2
Category: A(no delay in accordance with IEC / EN 60947-2 standards)
Degree of protection (IEC 60529) Device in modular enclosure: IP40
Tropicalisation: Relative humidity(95% at 55℃ in accordance with IEC 60068-2 and GB 14048.2 standards)
Temperature Operating: -25-70℃ Temperature Storage: -40-85℃
Connection
Tightening Torque: 2.5 N.m
Copper Cables Rigids: 1-25 mm²
Copper Cables Flecibles with ferrule: 1-16 mm²
Cu/Al Terminal: 50 mm²
Ring tongue terminal screw connection: ø5 mm
