Noja Power 310 series 15 and 27 kV automatic circuit reclosers

Noja Power has released its 310 series 15 and 27 kV automatic circuit reclosers (ACR). The ACRs extend the company’s range of electricity distribution grid protection products by complementing the existing 300 series 38 kV ACR.

The 310 series replace older products which were rated at 630 A with units capable of up to 800 A continuous current operation. The increase in the continuous current rating to 800 A allows utilities to use the ACR in a wider range of electrical network configuration options. The 310 series ACRs also feature a fault make capacity (RMS) of 12.5 kA and an impulse withstand phase-to-earth and phase-to-phase of 110 kV for the 15 kV unit and 150 kV for the 27 kV unit.

The 310 series ACRs have been fully type tested to ensure long life and reliability under the harshest environmental conditions.

Benefits of the series include the use of a vacuum interrupt and solid dielectric insulator instead of the environmentally unfriendly oil or sulfur hexafluoride (SF6) gas used in older products. The stainless steel enclosure is said to form the only solid dielectric unit with controlled arc venting available and the controlled arc venting design meets the requirements of IEC62271-200 Clause 6.106 and Annex A. Another benefit is the RC10 control and communications cubicle, a SCADA-ready controller that provides a directional overcurrent, earth fault and sensitive earth fault relay, auto reclosing relay, instantaneous metering, event log, demand logger and remote terminal unit (RTU) for remote control in a single package.