44kV ONAN Oil immersed Skid Mounted Substation Transformer
Key attributes
| Brand | Vziman |
| Series | SZ |
Product descriptions from the supplier
Description
Skid Mounted Substation Transformer Description
The 5000 kVASkid Mounted Substation Transformer is the core component of a Skid Mounted Substation, offering a turnkey solution for rapid deployment in medium-voltage distribution networks. As the heart of the Skid Mounted Substation, this transformer is housed on a heavy-duty skid frame, stepping down primary voltages up to 44 kV to 4.16 kV (or custom secondary levels) with ±5% on-load tap adjustment (41.8 – 46.2 kV range).
Built to CSA C88 and UL/cUL standards, the Skid Mounted Substation Transformer features a conservator tank with silica-gel breather to maintain oil purity, while ONAN cooling supports continuous 5 MVA operation—critical for the stable performance of the entire Skid Mounted Substation. Crafted for outdoor installations—from EV charging stations to data centers and renewable energy plants—this Skid Mounted Substation Transformer enables the Skid Mounted Substation to deliver reliable performance, low maintenance, and straightforward modular integration for projects requiring fast substation builds.
Skid Mounted Substation Transformer Product Accessories
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Integrated Control & Protection Panel：Prewired relays, metering CTs, and ground-fault detection in a NEMA 3R enclosure, perfectly matched to the Skid Mounted Substation Transformer and Skid Mounted Substation system.
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Buchholz & Pressure Relays：Twin-float gas/oil surge detection and vacuum/pressure monitoring for fault protection of the Skid Mounted Substation Transformer, safeguarding the Skid Mounted Substation from potential failures.
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On-Load Tap Changer (OLTC)：Motor-driven, ±5% regulation with position indicator for live voltage tuning, optimizing the output of the Skid Mounted Substation Transformer in the Skid Mounted Substation.
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Conservator Tank & Breather：Silica-gel desiccant keeps oil dry; magnetic level gauge signals low-oil alarms, ensuring long-term stability of theSkid Mounted Substation Transformer.
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HV/LV Bushing Assemblies：Porcelain bushings rated to 250 kV/75 kV BIL with integral cable termination kits, facilitating safe connection within the Skid Mounted Substation.
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Radiators & Cooling Fans：Bolt-on, galvanized radiators and auto-start fans for effective ONAF cooling stage, supporting the Skid Mounted Substation Transformer’s continuous operation.
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Grounding & Lifting Hardware：Stainless-steel grounding lugs, forklift pockets, and skid mounting brackets, designed for seamless integration of the Skid Mounted Substation Transformer into the Skid Mounted Substation.
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Drain & Sampling Valves：Bottom-mounted valves for safe oil testing and maintenance without tank entry, reducing downtime of the Skid Mounted Substation Transformer and Skid Mounted Substation.
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Nameplates & Wiring Diagrams：Durable data plates and laminated schematics for easy reference, simplifying maintenance of the Skid Mounted Substation Transformer in the Skid Mounted Substation system.
Skid Mounted Substation Product Specifications
| Rated Power | 5000 kVA (ONAN) / 5500 kVA (ONAF) |
| Primary Voltage | 44 kV (up to 46.2 kV max tap) |
| Secondary Voltage | 4.16 kV (customizable to 2.4 – 13.8 kV) |
| Tap Changer | OLTC, ±5 % in 5 steps |
| Cooling Method | ONAN (standard), ONAF (optional) |
| Frequency | 60 Hz |
| Impedance | 6.5 % |
| BIL Rating | 250 kV (HV) / 75 kV (LV) |
| Oil Volume | 3133 L |
| Total Weight | 15 800 kg |
Skid Mounted Substation Product Applications
- Utility Distribution Nodes
- Battery Energy Storage (BESS)
- Data Centers & Crypto Mining
- EV Charging Stations
Skid Mounted Substation Transformer Product Advantages
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Skid-Ready Deployment：Factory-installed on a transport frame, the Skid Mounted Substation Transformer enables the Skid Mounted Substation to have minimal onsite assembly and rapid commissioning, cutting project timelines significantly.
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Flexible Cooling & Capacity：ONAN design handles 5 MVA continuous loads for the Skid Mounted Substation Transformer; optional ONAF fans boost capacity by 10%, enhancing the Skid Mounted Substation’s adaptability to varying loads.
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Integrated Protection & Control：Prewired panels and relays are tailored to the Skid Mounted Substation Transformer, cutting field wiring errors and accelerating startup schedules for the entire Skid Mounted Substation.
Documentation Resource Library
Restricted.
Vziman IEC/ ANSI Skid-mount power transformer selection catalog
Catalogue
English
Consulting
FAQ for Skid Mounted Substation
Q: How do you ensure the quality and reliability of your transformers?
A:
Our transformers are produced under a rigorous quality management system covering every stage from material selection to final testing. Each product comes with a minimum 24-month warranty, ensuring long-term safety and reliability. This commitment to quality has earned the trust of global customers and leading industry players.
Q: What range of transformer products do you offer and which standards do they meet?
A:
We manufacture a diverse array of transformers including Oil-Immersed Distribution Transformers, Dry Type Transformers, Power Transformers, Three Phase Pad Mounted Transformers, Single Phase Pad Mounted Transformers, Substation Transformers, and Pole Mounted Transformers. Our technical team, with nearly 20 years of industry experience, ensures that our designs comply with international standards such as ANSI, IEEE, DOE, CSA, AS, AZS, GOST, IEC, and more. Additionally, many of our products have obtained UL, cUL, and CSA certifications, affirming their safety and performance in global markets.
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