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A device used for controlling electrical power in a data center is known as a power distribution unit or a PDU. The basic PDU is a large power strip without any protection for fluctuation. It provides data center equipment with standard electrical outlets with no monitoring or remote access capabilities. The PDUs come in two versions: a floor mounted or a 22ru rack mounted. Both these advanced models offer data for calculating power usage effectiveness.
A rack mounted PDU like the 18ru PDU is directly mounted on to racks so that it can control and check power to specific servers, switches and other data center devices. These PDUs also aid in balancing power loads. These devices, also known as smart PDUs or intelligent PDUs, include three-phase displays for devices as remote management tools. These tools use simple network management protocol to offer network administrators with the ability to adjust and watch power demands.
The other type of PDU, floor mounted PDU also known as main distribution unit (MDU), is an important bridge between building primary power and various equipment racks of the data centre. Each PDU can handle 300 kilovolts amp and above and is capable of providing power to multiple equipment racks.
A rack based PDU controls distribution of power to servers, storage units, network switches and other equipment in the rack. These intelligent devices measure and calculate the amount of energy used by racks and how efficiently it is used.
The PDU measures input voltage and current and energy to each circuit. They are capable to calculate total power capacity used and inform the data center operator when they are overloaded and need an extra PDU.
Intelligent PDUs track environmental factors and send alerts at the proper time. They help the administrators by providing enough facts to correlate environmental results to energy data and correlate them to understand their behavior in a better way.
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