SGOB 160 kVA Transformer With Robust Housing Protective Design is a China supply and export solution focused on residential and light commercial power distribution. Tailored for scenarios that demand superior safety, durability and long-term operational stability, it outperforms ordinary transformers with basic enclosure protection.
Housing Protective Design – Measured Parameters
Material grade
Steel: 2.0mm hot-rolled pickled
Yield strength: ≥235 MPa
Corrosion protection
Epoxy polyester powder coat
C5 classification (ISO 12944-6)
Dry film: 120–160μm
Ingress protection
IP54-equivalent (IEC 60529)
Gasket: Silicone rubber (20-year)
Salt spray result
ASTM B117 – 500 hours
Creepage from scribe: ≤2.0mm
No red rust on edges
Outdoor Service Life Estimation (ISO 12944)
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Environment
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Standard enclosure (C3, 1.5mm)
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SGOB (C5, 2.0mm)
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Difference
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Rural / suburban
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12–15 years
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20+ years
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+33%
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Urban / industrial
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8–10 years
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15–18 years
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+60–80%
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Coastal / high humidity
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5–7 years
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10–12 years
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+70%
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Electrical Performance – Tested Values
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Load condition
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Efficiency
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Losses
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25% load (40 kVA)
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97.9%
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Core loss dominant (~240W)
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50% load (80 kVA)
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98.4%
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Combined ~1,480W
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75% load (120 kVA)
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98.7%
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Optimal efficiency point
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100% load (160 kVA)
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98.3%
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Load loss increases with temp
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Our Patents:
Mechanical Integrity
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Base reinforcement: 140mm forklift channels + 4 lifting lugs (20,000 kg rated)
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Internal bracing: Core clamping pressure ≥15 MPa
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Fastener torque retention: Class 8.8 hardware with locking nuts; re-torque >10 years
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Paint adhesion: Cross-cut test ISO 2409 – rating 0 (no detachment)
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Impact resistance: ASTM D2794 – 40 inch-lbs no cracking
Full Technical Data Sheet
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Rated power
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160 kVA (continuous)
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Primary voltage
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6.3 / 10 / 11 / 20 kV (±2×2.5% taps)
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Secondary voltage
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0.4 / 0.415 / 0.433 kV
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Frequency
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50 Hz or 60 Hz
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Vector group
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Dyn11, Dyn5, Yyn0 (order specific)
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No-load loss
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≤240 W
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Load loss (120°C)
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≤2,600 W
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Impedance voltage
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4% (±5%)
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No-load current
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≤1.2%
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Temperature rise (oil/winding)
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55K / 60K
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Enclosure rating
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IP54-equivalent (IEC 60529)
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Steel thickness
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2.0 mm
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Coating system
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Epoxy polyester, C5-H (ISO 12944)
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Salt spray resistance
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500 h (ASTM B117)
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Dimensions (L×W×H)
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1,110 × 580 × 1,170 mm
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Weight (with oil)
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790kg ±5%
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Oil volume
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280 L (mineral oil)
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Cooling method
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ONAN
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Design lifetime
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20 years
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Standards
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IEC 60076, GB 1094, IEC 60529
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Lifecycle Service Framework
Response by region:
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Shanghai (≤200km): Field visit ≤2 hours
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China domestic: Remote ≤4h; on-site ≤48h
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Southeast Asia / Africa / CIS: Remote ≤8h; air spares ≤48h
Warranty (overseas):
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24 months from bill of lading
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Covers: Core, winding, bushing, internal connections
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Excludes: Oil degradation, overloading, lightning, improper grounding
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Third-party inspection: SGS or TÜV at buyer's cost
FAQ
Q: What corrosion test standard does the housing meet?
A: ASTM B117 salt spray – 500 hours with ≤2mm creepage. Coating certified to C5-H per ISO 12944-6.
Q: What is the actual steel thickness?
A: Base steel 2.0mm nominal. Coating adds 120–160μm.
Q: Can this 160 kVA Transformer With Robust Housing Protective Design be buried or submerged?
A: No. IP54 is not submersible. Designed for pad-mounted outdoor installation.
Q: How is the 20-year life validated?
A: ISO 12944 durability for C5 coating (15–25 years) plus insulation aging model with 55K temperature rise.
Q: Are replacement gaskets available?
A: Yes. Silicone rubber gasket kit (part SGOB-160-HSGKT) from Shanghai. Lead time 7 days.
Q: What export documentation is provided?
A: Packing list, invoice, bill of lading, factory test report (IEC 60076), coating certificate.
Reference Installations
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Location
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Quantity
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Installation date
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Environment
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Status
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Lekki Phase 1, Lagos, Nigeria
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8
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March 2024
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Coastal
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Operational, no corrosion
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New Clark City, Philippines
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5
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Sept 2023
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Urban tropical
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Inspections passed
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Almaty, Kazakhstan
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3
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Nov 2024
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Continental -30°C to +35°C
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Operational
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Dar es Salaam, Tanzania
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12
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Feb 2025
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Coastal salt spray
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6-month: coating intact
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Product Verification Summary
Three verified attributes:
1. Corrosion resistance: 500-hour salt spray (ASTM B117) with C5 coating – 2× durability of C3 enclosures.
2. Structural margin: 2.0mm steel vs industry typical 1.2–1.5mm – 33% thicker.
3. Electrical loss: 240W no-load loss – 11% lower than S11-M-160 reference (270W).
SGOB
160 kVA Transformer With Robust Housing Protective Design is developed not only as a distribution unit but as a reliability-focused infrastructure asset. By combining reinforced housing engineering, stable electrical architecture, and structured global service support, it provides a more dependable solution than standard market alternatives for residential and urban power systems.
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