Việc lựa chọn và tính công suất UPS phù hợp cho các thiết bị IT là một vấn đề khá khó khăn cho các cán bộ không có nhiều kiến 
thức về điện và UPS. Nhưng khi công ty có nhu cầu thì người chọn lựa UPS là cán bộ IT . Các vấn đề cần phải giải quyết như : bên mình có 1 server, 1 switch, 1 router thì sử dụng UPS nào phù hợp…..2 server, 1 máy in, cần lưu điện 30min thì UPS online hay offline
Để giúp các bạn lựa chọn và tính công suất UPS phù hợp với nhu cầu IT. www.suachuaups.net hưỡng dẫn các bạn các trình tự để tự mình tính toán cho nhu cầu của mình.
Theo nguyên lý bảo toàn năng lượng thì công suất cấp ( UPS ) phải lớn hơn hoặc bằng công suất tải. Do đó đầu tiên ta cần phải tính toán tổng công suất tải bằng cách :
- Lên danh sách các thiết bị cần UPS bảo vệ.
- Xác định công suất VA của từng thiết bị ( nếu thiết bị không có thể hiện công suất thì ta lấy điện áp (Volt) nhân với dòng điện (Amp) của từng thiết bị trong danh sách sẽ được công suất VA
- Tính tổng công suất VA tất cả thiết bị.
- Để đảm bảo khoảng dự phòng. Công suất UPS nên chọn bằng hoặc lớn hơn công suất tổng của các thiết bị 20%.
Ngoài ra, có 1 số yếu tố khác ảnh hưởng tới việc chọn công suất UPS như :
- Công suất danh định trên thiết bị là công suất tối đa nếu thiết bị không sử hêt các chứng năng, phụ kiện thì công suất thực tế sẽ nhỏ hơn. Thông thường UPS chỉ tiêu tốn khoảng 50% công suất danh định, thông thường mỗi hãng đều có các công cụ tính toán của nhà sản xuất để xác định công suất tương tứng với cấu hình sử dụng.
- Nếu tải UPS là các động cơ hoặc máy in lazer, hoặc các thiết bị có dòng khởi động lớn bạn nên tính thêm công suất cho UPS để bù vào phần năng lượng tăng đột biến khi thiết bị khởi động.
- Khả năng mở rộng thiết bị trong thời gian ngắn, nâng cấp phần cứng, máy chủ hoặc trang bị thêm các sản phẩm mới thường yêu cầu mức năng lượng cao hơn phiên bản cũ. Do đó, bạn cần dự đoán nhu cầu công suất tăng thêm trong ngắn hạn hoặc trung hạn để lựa chọn UPS phù hợp
Ví dụ : Chọn công suất UPS cho 1 server, 1 router, 1 switch:
Server : công suất danh định = 1000VA
Router : Công suất danh định = 100VA
Switch : công suất danh định = 200VA
=>tổng công suất tải = 1.300VA
Dự phòng côgn suất UPS 20%=1.300*1.2 = 1.560VA.
=> chọn UPS công suất 2KVA .
Nếu cần thông tin kỹ thuật hãy liên hệ với nhân viên chúng tôi để được hỗ trợ tốt nhất.
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