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Tag: "optional standby system"

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Part III: Transfer Equipment Applications and Considerations

[ 0 ] By  |  September 18, 2009  |  IAEI September-October 2009

Transfer equipment installations can be extremely complex, even for optional standby arrangements that are critical to business operation. This is the final installment in a series of articles examining transfer equipment used in optional standby systems for commercial applications. In Part I of this series, we covered the fundamentals of transfer equipment used in optional [...]

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Figure 1. Typical one-line diagram for two mechanically interlocked devices

Transfer Equipment Used in Optional Standby Systems for Commercial Applications, Part II – Transfer Equipment Options

[ 3 ] By  |  July 14, 2009  |  IAEI July-August 2010

The primary purpose of transfer equipment is to allow power transfer from a normal (Utility) source to an alternate (Generator) source while preventing the inadvertent interconnection of the normal and alternate source of supply during operation of the transfer equipment. During Part I of this series, we covered the fundamentals of transfer equipment used in [...]

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Figure 1. Key Transfer Sequence: Current Condition – Utility source feeding load – Breaker A Closed, Breaker B Open, Key A1 held in Breaker A. Desired Condition – Generator source feeding load – Breaker B Closed, Breaker A Open. 1) Open Breaker A and Rotate Key A1 to Lock Breaker Open – Key is now free. 2) Remove Key A1 from Breaker A and insert key into lock on Breaker B. 3) Rotate key A1 to unlock breaker B, Key A1 now held captive. 4) Close Breaker B. 5) Reverse procedure to restore service to breaker A.

Transfer Equipment Used in Optional Standby Systems for Commercial Applications, Part I

[ 0 ] By  |  May 14, 2009  |  

Significant growth in optional standby systems for commercial applications is being driven by the demand for electrical power to be present that will ensure continuity of business activities. Concerns stem from weather related outages to other reliability issues that can result in the loss of electric utility of a building, communication center, or process. Loss [...]

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