250A/550V DC Moulded Case Circuit Breaker (MCCB)
250A/550V DC moulded case circuit breaker (MCCB) for protecting PV installations. Free quote from LAGUA Solaire.
MCCB moulded case circuit breaker: A moulded case circuit breaker (MCCB) is an electrical device that protects a circuit against overloads and short circuits. When specifically designed for direct current (DC), it is called an MCCB/DC breaker. Main functions and features of an MCCB/DC breaker: • Overload protection: detects abnormally high currents caused by an overload and interrupts the current to avoid damage to electrical equipment and keep the system safe. • Short-circuit protection: in the event of a short circuit, the breaker reacts quickly by opening the circuit, preventing further damage and fire risks. • Manual or automatic reset: some MCCB/DC breakers are reset manually after tripping; others offer automatic reset. • Adjustable sensitivity: some models allow the trip sensitivity to be set according to the system's needs. • Status indication: some breakers have indicators showing whether they are open (tripped) or closed (on). • Designed for DC applications: MCCB/DC breakers meet the specific requirements of direct-current systems, whose load characteristics and switching conditions differ from AC systems. • Integration in distribution boards: these breakers are…
Technical specifications
- Courant Max.
- 250 A
- Pôles
- 2P
- Tension nominal (DC) Ue
- 550 V
- Courant nominal In (A)
- 250 A
- Tension nominale d'isolation Ui
- 1500 V DC
- Tension d'impact assignée Uimp
- 8 KV
- Tension de résistance
- 3.8 KV
- Indice de protection
- IP 20
- Température
- -45°C - +70°C