
Alltec and Siemens Energy: 25 years of partnership
Alltec received Siemens Energy’s Supplier Performance award, recognition built over 25 years of partnership, project after project.
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Technical articles on electrical panels and substation digitalization, plus news on the projects we deliver in Brazil and the United States: transfer cubicles and control cabinets for transformers and shunt reactors.

Alltec received Siemens Energy’s Supplier Performance award, recognition built over 25 years of partnership, project after project.
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Alltec has started manufacturing new transformer control cabinets for Transformadores Itaipu, built for 15/18.75 MVA, 72.5 kV power transformers bound for Coopersul and equipped with Schweitzer SEL-2414 and SEL-2505 relays.
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Alltec supplies the control, protection, and monitoring cabinets for Siemens Energy’s 500 kV shunt reactors at APS’s Cholla – Delaney Substation in the Arizona desert.
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Control transfer cubicles bring the spare shunt reactor or transformer into service within minutes, safely and with no connection errors. Here are the main functions and technical characteristics of these cubicles in 345/500 kV substations.
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Alltec supplied Siemens Energy with the spare shunt reactor transfer cubicle bound for Engie’s Poções III in Bahia, Brazil, designed for safe transfer between the main and spare reactors while preserving protection selectivity.
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We have begun delivering the design and the control cabinets for the two 315 MVA, 345 kV generator step-up (GSU) transformers at Panther Grove II, a 500 MW wind farm in Illinois (U.S.). Both the design and the cabinets meet CSA and IEEE standards.
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When panel design and assembly are split between different companies, the chain that IEC 61439 relies on to ensure the conformity of the assembly breaks down. See the points in the standard that show this, and why integrating design, supply, and assembly reduces risk.
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For ITAM, we designed and manufactured the control cabinet of a 10/12.5/15 MVA, 34.5/13.8 kV regulating transformer for end customer Energisa Mato Grosso, with digital protection and monitoring, forced cooling, and tap-changer control.
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Yes. Digitalizing power transformers and shunt reactors with IEC 61850, merging units, and optical fiber makes it possible to supervise, protect, and control a substation remotely — reducing, or even eliminating, the local control room.
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