This TA25D3L2504TPE is a low voltage power transfer switch used in industrial and commercial buildings, data centers, healthcare facilities and transportation industry. The rated operational voltage(Ue) is 400VAC@50/60Hz. This change source is AC-33B utilization category. The rated current(Ie) can be loaded 250A(Ie) at 60℃, with 250A frame. The front has a inbuit LCD display module which is used for displaying status and alarm setting, and control by push button. This transfer switch provided 3 contact postion to the front by mechanical and electrical indication. It can be fixed on the plate and position it inside of power distribution cabinet. It also has some optional accessories in terms of different application scene. This 3poles version is 370mm(width)x341mm(height)x185.8mm(depth). It is compliance with standard IEC 60947-6-1, and certified by CE/CB/CCC. It is suitable for power transfer of life safety loads like Fire-fighting equipment, Smoke Extract Fans, Sprinkler pumps,emergency lights etc.