The MiCOM Agile P341 interconnection protection relays offer the protection requirements necessary for operating machines in parallel with the main power supply network. The P341 can be customized to meet the specific needs of the intended application. It offers complete, cost-effective and highly reliable protection for interconnecting distributed generators to the grid.

P341 also includes Dynamic Line Rating (DLR) protection to optimize transmission line capacity. Gains of 50% or more can be achieved, enabling more distributed generation (DG) to be connected to the grid, by taking into account the real time weather conditions to calculate the line rating compared to using the fixed summer/winter line ratings. DLR is a cost effective alternative to reinforcing overhead lines to increase capacity, and higher DG revenues can be made with a higher line rating.

Key Features

• Check synchronizer manages closing of generator circuit breaker when connecting to the grid
• Dual techniques for loss of mains/islanding detection using df/dt or voltage vector shift
• Current loop analogue inputs (CLIO) for monitoring of external sensors e.g. weather sensors for DLR
• Dynamic line rating for maximizing the loadability of the transmission line Programmable curves for overcurrent, earth fault, SEF, neutral voltage and over/under voltage for easy protection customization