Hot swap power supplies with caddies are easy to install and have zero transfer time, with protective covering plates the units can be removed and replaced without the operator coming in contact with the live powered circuitry. Hot swap power supplies allow those with the desire to change the configuration or repair a working system to do so without interrupting its operation. Also known as dual redundant power supplies, hot swap power supplies have many features including active current sharing outputs, remote sense, alarms and TTL signal. Standard features of hot swap power supplies include over load, over voltage and short circuit protection, available as 19″, 1U, 2U, mini redundant, Raid, AT, ATX, N+1 and redundant.