The ATS-250A-RSC-4P changeover switch is designed to automatically transfer load circuits from main power source to reserve source in a wide variety of 1-3 phase applications. FEATURES - Electric motor gear activated switching; - 1-3 phase 4 pole operation; - Auto and Manual/Remote mode switch; - 3 position switch handle(”I”-”0”-”II”); - Generator start/stop remote control outputs; - External ATS/AMF controller remote control inputs; - High reliability and low power consumption due to fixed positions of the change-over mechanism energized during switching process only; - Front side position indication pointer and external lamp outputs; - Control signal protection fuses; - Built-in mechanical and electrical interlocking. INPUTS AND OUTPUTS - Normal source inputs: R, S, T, N; - Reserve source inputs: R, S, T, N; - Load cirquit outputs: R, S, T, N; - External indication lamp outputs; - Generator start/stop remote control outputs; - External ATS/AMF controller remote control inputs. TECHNICAL SPECIFICATIONS - Rated Operating Voltage: 230/400V(2-3 phase), 230V (single phase), 120/208V(3 phase), 120/240V (2 phase). - Voltage frequency: 50/60Hz. - Switching poles: 4 - Rated operating current: up to 250А per device pole; - Working temperature range: from -5'C to +40'C; - Humidity: up to 95%; - Installation type: vertical; - Control voltage: 175-265VAC - Switching current: up to 0.5A; - Switching time: 1-2 sec; - Rated insulation voltage: 800V - Rated impulse withstand voltage: 8kV - Rated making capability: 10KA - Rated short-time withstand currrent Ie 30ms:17KA - Nominal control supply voltage: 230VAC - Life switching cycles: up to 10000; - Use category: AC-331B; - Altitude: up to 2000 meters; - Protection class: IP30 - Weight: 2.2 kg.