Technical Articles

LayerZero Power Systems, Inc. has published these technical articles:

Double Your Power at the Rack ...by Eliminating Inrush for Out-of-Phase Transfers (.pdf)
(Electrical Distribution and Protection)
From this Article:
The focus of recent data center conferences has been on trying to remove additional heat being produced in computer rooms. The introduction of blade servers has not only increased the amount of heat...
A Case For The Omission of Shunt Trips in STS (.pdf)
(Electrical Distribution and Protection)
From this Article:
Static transfer switch (STS) devices occupy a unique architectural location in mission critical infrastructure systems, in that their tolerance for failure is virtually zero. Generally located at the...
Analysis and Opinion on the Operation of Switch Mode Power Supplies under Switched Voltage Phase Conditions (.pdf)
(Electrical Distribution and Protection)
From this Article:
This note presents an opinion related to the operation of switch mode power supplies (SMPS) as loads in data center power architectures where their input voltage may be subject to instantaneous phase...
Circuit Breaker Selective Trip Coordination in 225A and 400A Distribution Panelboards (.pdf)
(Electrical Distribution and Protection)
From this Article:
With the increase of transformer size in the data center, much higher levels of available fault current are being seen. The use of "zero-crossing" circuit breakers to handle these faults, often in the...
On the Inability to Truly Detect Open SCRs on the Inactive Side of Static Transfer Switches (.pdf)
(Electrical Distribution and Protection)
From this Article:
An open SCR condition on the inactive side of a static transfer switch cannot be detected. When a switch is in an off position it is impossible to predict that the switch will conduct current through...