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Special Configuration Oil-Immersed Transformers Series Oil-Immersed Transformers
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Special Configuration Oil-Immersed Transformers — Natural Ester, Sealed Tank & OLTC
Special-configuration oil-immersed transformers cover biodegradable natural-ester and silicone liquid insulation, fully sealed corrugated-tank construction, on-load tap changing, double-split windings for photovoltaic duty, and Z-type grounding transformers. Rated 10–5000 kVA, 0.48–35 kV primary and 0.208–0.48 kV secondary, 65 K temperature rise. Suitable for green-energy projects, solar farms, utility grounding, and high-reliability networks.
Key Features
- Natural-ester (biodegradable) and silicone liquid insulation for eco-sensitive and fire-safe sites
- Fully sealed corrugated-tank construction with no free-breathing conservator
- On-load tap changer (OLTC) for voltage regulation without interruption
- Double-split low-voltage windings for photovoltaic and wind applications
- Z-type (zig-zag) grounding transformer configuration for neutral earthing
Applications
- Green-energy and eco-sensitive projects
- Solar and wind farm step-up
- Utility neutral grounding systems
- High-reliability industrial networks
Selection Guide
Liquid
Natural ester for eco/fire-safe sites, mineral oil for standard duty.
Tank
Sealed corrugated tank for low-maintenance outdoor duty.
Voltage control
OLTC for continuous regulation, DETC for occasional adjustment.
- Frequently Asked Questions
What are the benefits of natural-ester liquid?
Natural ester is biodegradable, fire-safe (high fire point), and environmentally friendly, making it ideal for eco-sensitive or indoor-critical sites.
What is a sealed corrugated tank?
The corrugated tank walls absorb oil expansion without a conservator and desiccant breather, reducing maintenance and moisture ingress.
When is an OLTC needed?
An on-load tap changer maintains output voltage during load or source variation without interrupting supply; off-circuit (DETC) is used where voltage is adjusted only during maintenance.
What is a Z-type grounding transformer?
A zig-zag connected transformer provides a neutral point for earthing where the system has no neutral, enabling earth-fault protection.
Instant Selection & Quote Calculator
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| Base price (interpolation) | $2,332 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Aluminum winding — no copper linkage
Reference prices are for estimation only and do not constitute a formal offer.
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