The Power Transfer Switch – Economical Power Fallback and Redundancy for Single Power Inlet Devices

One of the most critical requirements for a modern corporate network is reliability; the network needs to be available 24 hours a day, seven days a week in order to support the needs of users and customers and to ensure constant communication within the corporation and with the outside world. One of the most important factors in ensuring network reliability, is an effective power redundancy solution, that allows network equipment to automatically switch over to a back-up power supply in the event that the main power supply fails.

Surprisingly, many network administrators postpone the implementation of power redundancy solutions, simply because their existing single-power-inlet devices do not provide power fallback capabilities, and the cost of replacing those existing single-inlet devices is prohibitively high. If a tight budget and a handful of single-power-inlet devices are the only things standing between your network and an effective power redundancy solution, a power transfer switch can often solve the problem by providing automatic power fallback switching without the need to replace existing single-power-inlet devices.

The operating principal behind a power transfer switch is incredibly simple. The power transfer switch is connected to both your primary and secondary power supplies, and then single-power-inlet devices are connected to the power transfer switch. When the power transfer switch detects that the primary power supply has failed or become unstable, the power transfer switch can quickly switch over to the secondary, back-up power supply with no noticeable interruption of power to your network devices. A high quality power transfer switch should be able to provide automatic switchover times as brief as eight to 16 microseconds; fast enough that the switchover is basically undetectable by both network users and devices.

Some full-featured power transfer switch products also support the ability to automatically switch back to the main power supply when he power transfer switch determines that the main power supply has come back on line, or stabilized. Power transfer switch products are available in a wide variety of configurations, to support 120 VAC to 240 VAC power, and various current demands and outlet types.

Don’t let the high cost of replacing single-power-inlet network devices prevent you from implementing a power redundancy strategy and improving the reliability of your network; an power transfer switch allows you to implement an effective power redundancy strategy without the cost of replacing single inlet network devices, and without the hassle of reconfiguring your other network elements for compatibility with new dual-power-inlet devices.

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