110/350uS Waveform: SPD series graphite gap type surge protector belongs to the first class protection device with 10/350uS waveform. Designed according to IEC and GB standards 2First Level Surge Protection: Applied to the first level surge protection of power supply for equipment systems in areas with high risk of thunder strikes 3For Single and Three Phase Lines: Can prevent various surge currents including direct thunder strikes, can be applied to single and three phase power supply lines through different combinations of numbers 4Standard 35mm Guide Rail Installation: Modular design, standard 35mm guide rail type installation method, installed in the building's main power distribution cabinet(box) and outdoor 5High Thunder Current Discharge Capability: Possess high thunder current discharge capability, no freewheeling, maximum impulse current(10/350us) reach limp=15KA, maximum discharge current(8/20us) reach Imaximum=100KA Item Type: Surge Protective Devices Product Model: BEM-LYI15 Product Specifications: 4P15KA Rated Voltage: 220V/385V Maximum Sustainable Working Voltage: 385V Insulation Resistance: >100Mohm Impulse Current (10/350us): Peak Current: 15KA; Amount of Charge: 7.5AS; Energy: 56.25KJ/Q Maximum Discharge Current8/20us: 100KA Nominal Discharge Current8/20us: 15KA Voltage Protection Level: 2.5KV Response Time: 100nS Ambient Temperature: -40~+80 Shell Material: Flame retardant nylon Protection Level: IP20 Equipped with Front Fuse: 125A Altitude: Not more than 2000meter Relative Humidity: Not more than 90%(25) 1 x Surge Protective Devices1. The indicator window of the module is green (normal). When the module deteriorates, the indicator window turns red and must be replaced in time.2. The surge protector can be equipped with (FS) remote remote signal alarm. The remote signal contact has one normally open and one normally closed. If one or more modules of the surge protector fail, the contact will be closed and a fault alarm signal will be sent. Indicates that the module is faulty and must be replaced.3. Frequently check the air switch or fuse on the serial line.