Entogo
Power Transformers
Separate distribution-level equipment from high-voltage and inverter-duty applications.
Select the transformer against the network study: voltage ratio, MVA, impedance, insulation level, tap regulation and cooling. High-voltage substation duty and inverter duty add distinct requirements. A voltage class alone does not define the transformer or the scope of supply.
Power Transformers
36 kV Oil-Immersed Power Transformer
A liquid-filled (mineral oil) three-phase power transformer for substation and subtransmission duty in 34.5 / 35 / 36 kV networks, rated 2.5 to 31.5 MVA with ONAN / ONAF cooling, off-circuit or on-load tap changing and copper windings, designed to IEEE C57.12.00 / C57.12.10 and IEC 60076.
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Power Transformers
High-Voltage Power Transformer
Entogo supplies high-voltage power transformers for substations and industrial networks. The design brief covers MVA, voltage ratio, insulation coordination, impedance, tap regulation, cooling and transport limits.
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Power Transformers
Solar Inverter-Duty Transformer
Entogo supplies inverter-duty transformers for PV and battery-storage interconnection. Match the inverter/PCS voltage, winding arrangement, grounding, harmonics and thermal duty to the collector network and connection study.
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Design references
Power & Distribution
Solidly grounded, resistance-grounded, or ungrounded? Choosing a power system grounding scheme
Most North American facilities are solidly grounded, but resistance grounding can keep a plant running through a first ground fault. How to choose among solidly grounded, high-resistance grounded, and ungrounded systems, and what each requires under the NEC and IEEE 142.
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Power & Distribution
What transformer impedance should you specify? How %Z shapes fault current and voltage drop
Transformer percent impedance (%Z) sets how much fault current the secondary can deliver and how far voltage sags under load. Lower %Z means higher available fault current and better regulation; higher %Z limits fault duty but drops more voltage. Here is how to choose it and what to specify.
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Renewable Grid Connection
Interconnecting solar and storage to the grid: what IEEE 1547-2018 requires
Connecting solar or battery storage to the North American grid means meeting IEEE 1547-2018 for DER behavior, using a UL 1741 SB certified inverter, and passing a utility interconnection review that scales from a fast-track screen to a full study. Here is how the pieces fit.
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For Canadian and US projects, include the utility specification, service frequency and required approvals. State whether the order is for the transformer alone or an integrated equipment package.
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Compare equipment by function and installation. Product pages identify the available scope and the information needed for a quotation.