Product Description

Manufacturer: Shanghai Industrial Transformer Co., Ltd. (Est. 2007)

The 80 kVA Oil Immersed Transformer For Commercial Power Distribution is a common specification for small to medium commercial facilities including convenience stores (300-500m²), community clinics, small hotels (20-30 rooms), and light manufacturing workshops with total connected load between 150-250 amperes at 0.4kV.

80 kVA Load Capacity – What Can It Power?

Equipment type	Quantity	Subtotal load (kVA)
LED lighting (100W each)	100 fixtures	10
HVAC (5kW cooling each)	4 units	20
Elevator (7.5kW)	1 unit	8
Point-of-sale systems + IT	10 workstations	5
Refrigeration (commercial coolers)	6 units	12
Miscellaneous outlets	-	15
Total typical load		70 kVA
Safety margin		10 kVA

This 80 kVA Oil Immersed Transformer For Commercial Power Distribution supports the above typical commercial mix with 10-15% capacity reserve for future expansion.

80kva Oil Immersed Transformer

Technical Parameters

Rated capacity	80 kVA
Primary voltage	10 ±2×2.5% / 20 kV
Secondary voltage	400V / 230V three-phase
Frequency	50 Hz
Connection group	Dyn11 (standard)
No-load loss (measured)	≤0.18 kW (typical 0.176-0.179)
Load loss @75°C	≤1.05 kW
Impedance	4%
No-load current	≤1.7% (typical 1.5-1.6%)
Total mass	540 kg (oil mass approx. 105 kg)
Shipping dimensions	950 × 600 × 1250 mm (crated)
Cooling method	ONAN (Oil Natural Air Natural)
Noise level at 1m distance	≤55 dB(A)

Measured Values from Factory QC (Last 12 Months, 47 Units)

Parameter	Factory test average	IEC limit	Status
No-load loss	0.177 kW	0.20 kW (max)	11.5% below limit
Load loss	1.04 kW	1.10 kW	5.5% below limit
No-load current	1.55%	2.0%	22.5% below limit

All 47 units passed partial discharge test with readings between 2-7 pC (limit ≤10 pC).

Annual Energy Cost – Real Numbers

Calculation basis: 80kVA transformer operating at 50% average load (40 kVA), power factor 0.85, operating hours 5,840 hours/year (16h/day × 365 days), electricity rate $0.12/kWh.

Loss type	Power (kW)	Annual energy (kWh)	Annual cost
No-load loss (24/7)	0.18	1,577	$189
Load loss (at 50% load)	1.05 × (0.5)² = 0.26	1,518	$182
Total	0.44 avg	3,095	$371

At 60% average load (48 kVA), annual cost increases to approximately $440.

Noise Level – Important for Commercial Installations

Commercial transformers are often installed near occupied spaces. Noise sources and mitigation in this 80 kVA Oil Immersed Transformer For Commercial Power Distribution:

Noise source	Contribution	Mitigation in this model
Core magnetostriction	70%	Flux density reduced to 1.65T (vs 1.70T standard)
Cooling fan (if equipped)	0%	No fans – ONAN only
Tank vibration	20%	Anti-vibration pads between core and tank
Magnetic hum	10%	Step-lap core joints

Measured sound pressure level: 53-55 dB(A) at 1 meter. For reference: normal conversation is 60 dB(A), office background is 45-50 dB(A). This transformer is suitable for installation in basement electrical rooms adjacent to occupied floors when proper wall insulation is provided.

Where Does 80kVA Fit? – Capacity Selection Matrix

Facility type	Typical max demand	Recommended rating	Why
Small convenience store (200m²)	25-35 kVA	50kVA	80kVA oversized
Supermarket (500m²)	55-70 kVA	80kVA	Matches typical load
Small hotel (25 rooms)	50-65 kVA	80kVA	Allows for AC load peaks
Community health clinic	40-60 kVA	80kVA	Medical equipment surge margin
Light machine shop (3-5 machines)	50-75 kVA	80kVA	Motor starting current
Office building (1500m²)	60-85 kVA	100kVA	80kVA borderline

If your peak demand exceeds 70 kVA for more than 4 continuous hours, select 100kVA instead.

Installation Requirements – Commercial Building Constraints

Requirement	This 80kVA unit	Notes
Floor area needed	0.45 m² (870×510mm)	Plus 600mm front access
Floor loading	540kg + oil containment	1,000 kg/m² minimum
Ceiling height	2.2 m minimum	For bushing access
Ventilation opening	0.15 m² inlet + outlet	Natural convection
Fire protection	IEC 60076-12 compliant room	Mandatory for indoor oil-filled
Clearance from combustibles	1.5 m	Per NFPA 70

Does not require: fire suppression system (for oil-filled <500L oil volume per IEC), special foundation bolts (mounting holes provided), or acoustic enclosure (≤55dB acceptable for non-sleeping areas).

Quality Evidence – Factory Test Report Contents

Each 80 kVA Oil Immersed Transformer For Commercial Power Distribution ships with a test report containing these measured values (not just "pass/fail"):

No-load loss at rated voltage (3-phase average)
No-load current as percentage of rated
Load loss at 75°C referenced to rated current
Impedance voltage at rated current
Insulation resistance (primary to secondary, primary to ground, secondary to ground)
Dielectric withstand test voltage and duration
Partial discharge extinction voltage and maximum charge
Oil dielectric breakdown voltage (≥40 kV per IEC 60156)
Tank sealing test (30 kPa, 24 hours, pressure gauge reading)

Buyers receive a PDF report with serial number traceable to production batch.

Comparison – New S11 80kVA vs Used/Refurbished 80kVA

ParameterNew S11 (this unit)Used S9 (10+ years old)No-load loss0.18 kW0.28-0.32 kWAnnual no-load energy cost (@$0.12)$189$294-336Load loss at 50% load0.26 kW0.31-0.35 kWAnnual load loss cost$182$217-245Total annual energy cost$371$511-58110-year energy cost$3,710$5,110-5,810Typical purchase price$2,800-3,200$1,200-1,80010-year total cost$6,500-6,900$6,300-7,600

Result: New S11 unit equals or beats used S9 total cost after 5-7 years, plus full warranty and no hidden damage.

Warranty Claim History – 80kVA Specific

Shanghai Industrial Transformer Co., Ltd. has shipped 47 units of 80kVA (S11-M-80/10) between January 2024 and January 2026.

Warranty claims filed: 0
Returned units: 0
Field failure reports: 0

These units were delivered to customers in Philippines (12 units), Indonesia (8 units), Nigeria (6 units), Vietnam (5 units), and domestic China (16 units). Contact information for reference customers can be provided under confidentiality agreement.

FAQ – Commercial Buyer Specific

Q: What is the exact oil type and quantity for customs?

A: Mineral oil IEC 60296 grade, approximately 105 kg per unit. HS code 2710.19. Transformer HS code 8504.23 (for 80kVA). Oil does not require separate declaration when factory-sealed.

Q: Can this be mounted on a concrete pad outdoors?

A: Yes. Outdoor installation requires pad height minimum 300mm above grade, oil spill containment basin, and weatherproof bushings (specify at order). Standard porcelain bushings are weather-resistant but UV exposure will cause cosmetic yellowing – no performance impact.

Q: What is the inrush current multiple?

A: Approximately 8-10× rated current for 0.1 seconds. For 80kVA at 400V secondary, rated current = 115A, inrush ≈ 900-1150A for first cycle. Ensure upstream circuit breaker has C-curve or D-curve characteristic (not B-curve).

Q: Do you provide installation supervision?

A: Remote video supervision included (WhatsApp/WeChat). On-site commissioning available at $1,800 per week plus travel and accommodation. Minimum 7 days advance notice.

Q: What is the altitude derating?

A: Above 1,000m, reduce rated capacity by 1% per 100m. At 2,000m altitude, this 80kVA unit should be limited to 72kVA continuous. No change to losses – only cooling efficiency decreases.

Q: Can I connect parallel with an existing 80kVA transformer?

A: Yes, if the existing unit has identical impedance (4% ±5%), voltage ratio, and connection group (Dyn11). Circulating current test required before parallel operation. We provide connection diagrams.

Long-Term Value

This 80 kVA Oil Immersed Transformer For Commercial Power Distribution delivers factory-measured average no-load loss of 0.177kW, noise level ≤55 dB(A), and zero warranty claims across 47 units shipped. It is suitable for supermarkets, small hotels, and light commercial facilities requiring 150-250A service at 0.4kV.

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