What support products does it take to maximize the impact of using VFDs and VSDs? - Part 2
Both power supplies must fail for the system power to fail. Using more power supplies in an N+1 configuration can increase the reliability of the overall power delivery system. A 3+1 redundant power architecture uses four power supplies, any three of which can power the entire load. A redundancy module typically uses diode isolation to connect the power supplies to ensure that the failure of any one power supply does not affect the operation of the other power supplies. For applications that require even higher reliability,
Figure 3: This soft start-stop unit can handle motors up to 15 hp. (Image source: DigiKey)
Redundant power Industrial systems use 24 V DC power for various functions like sensors, HMIs, and safety devices. Basic redundant power can improve the reliability of industrial installations. Redundant power uses two power supplies connected in parallel to power a load where each power supply is sufficient to power the entire load should the other supply fail. When two power supplies are used, it’s called 1+1 redundancy.
Figure 3: This soft start-stop unit can handle motors up to 15 hp. (Image source: DigiKey)
42
Powered by FlippingBook