Overvoltage protection power frequency overvoltage (POP) Besides transient overvoltages, transmission lines can transmit a power frequency overvoltage above 10% of nominal for an indefinite period, caused by network problems, bad connections, damage/theft of the neutral conductor. Electrical distribution systems use the neutral conductor (usually grounded) as a reference for phase voltages, the return current through this conductor permits the voltage between each phase and neutral to remain constant, should the neutral conductor break, the line-to-neutral voltage is floating, and depending on the load imbalance, increases voltage causing premature ageing, excessive consumption with a resulting fire risk. Features: Transient (surge) protection Overload and short circuit protection Also available without self-reclose facility Power frequency Overvoltage Protection (POP) Self-reclose MCB (automatically resets once fault is cleared) V-CHECK MR – surge protection + POP + self reclose MCB in a single unit SERIES V-CHECK MR DESCRIPTION Surge protection + POP + self reclose MCB in a single unit SPD IMAX L-N (kA) 20kA UP L-N (kV) 1.5kV POP Ua (V) 275 V MCB C CURVE (In) 16A MCB BREAKING CAPACITY 10kA NUMBER OF POLES 4 CONFIGURATION 3ph+N WIDTH IN 18 (MM) 9
V-CHECK 4MR-16
