Solid-Dielectric ACR Installation Improves Distribution Network Reliability

摘要

With the increase in demand for high-reliability power supply to Fiji Electricity Authority's (FEA) customer base, FEA purchased an initial 20 OSM Recloser units for installation mainly on the rural spurs of several distribution feeders. Offering a circuit exposure of more than 1000 km (621 miles), these feeders supply approximately 20% of the FEA's customer base. In the 12 to 18 months since the commissioning, more than 500 network faults have been registered and successfully restored beyond the recloser installation, with two recloser units accounting for more than 150 of these alone. Previously, an oil circuit breaker rated for 50 operations was used to protect the nearby substation and distribution feeders. The two NOJA Power OSM Recloser units now installed at the location of the circuit breaker are rated for over 30,000 operations and have performed 150+ operations in the 18-month period since commissioning, representing a substantial decrease in maintenance time and an increase in customer power supply.