alfanar NES-H is an Air Insulated Medium Voltage metal clad switchgear which is designed, manufactured and type-tested in accordance with the latest IEC standards and Saudi Electricity Company (SEC) specifications.

alfanar NES-H Switchgear complies with the highest quality requirements and is tested for resistance to internal arc faults (IAC AFLR). alfanar NES-H switchgear is commonly used in control and protection of medium voltage power equipment and circuits in industrial, commercial and utility installations involving generators, motors, feeder circuits, and transmission and distribution feeders.

Technical Specifications:

• Air Insulated Medium Voltage Metal Clad Switchgear as per IEC 62271-200
• Rated voltage: 17.5kV
• Main bus current ratings: (630/1250/3150/4000*) A, *4000A is forced cooling
• Functional units: Incoming Feeder, Outgoing Feeder, Bus Riser, Bus Section, Bus VT/Earthing
• Short circuit withstand current up to 40kA
• Short circuit duration (tsc): 3 sec
• Frequency: 60Hz
• Power frequency withstand voltage (for 1min): 38kV (rms)
• Lightning impulse withstand voltage (1.2/50 μs): 95kV (peak)
• Internal arc classification: AFLR (25kA/1sec or 40KA/0.1s)
• Loss of service continuity: LSC2B-PM