How much money can S22 first level energy-efficient transformers save each year?

What is S22 Level 1 Energy Efficiency?

It is the pinnacle of China’s latest and strictest energy efficiency standards.

This means that compared to our previous generation mainstream products, its average no-load loss has been reduced by about 30%, and the average load loss has been reduced by about 20%.

For users, this directly translates into significant electricity cost savings and carbon emission reductions throughout the entire lifecycle of the device.

Let’s take a commonly used 1000kVA oil immersed transformer as an example for detailed calculation.

⚙️  Comparison of core parameters (based on national standard GB 20052-2020)

Parameter S13 type (third level energy efficiency) S22 type (first level energy efficiency) difference (savings)

No load loss (Po) approximately 1000 W, approximately 550 W, and 450 W

Load loss (Pk) is approximately 10300 W, 8500 W, and 1800 W

Key note: No load loss (iron loss) occurs as soon as power is applied and is a fixed cost; Load loss (copper loss) varies with the size of the load and is a variable cost.

��  Annual electricity cost savings calculation (calculation model)

We set up a typical industrial operation scenario:

·Annual operating time: 8760 hours (continuous operation)

·Average load rate: 50% (i.e. actual load is about 500kVA)

·Average electricity price: 0.7 yuan/kWh (common price for commercial or industrial electricity)

1. Calculate the annual power loss

·Electricity consumption in S13:

=(No load loss+load loss x load rate ²) x annual operating hours

= (1.0 kW + 10.3 kW × 0.5²) × 8760 h

= (1.0 + 10.3 × 0.25) × 8760

=(1.0+2.575) × 8760 ≈ 31330 degrees

·Electricity consumption in S22:

= (0.55 kW + 8.5 kW × 0.5²) × 8760 h

= (0.55 + 8.5 × 0.25) × 8760

=(0.55+2.125) × 8760 ≈ 23428 degrees

·Annual energy savings: 31330-23428=7902 kWh

2. Calculate annual electricity savings

Annual electricity savings=Annual electricity savings x Electricity price=7902 kWh x 0.7 yuan/kWh ≈ 5531 yuan

��  Conclusion and Investment Analysis

1. Direct economic benefits:

In the above standard scenario, a 1000kVA S22 can save about 5531 yuan in electricity bills per year compared to S13.

·Impact of situational changes:

·If the load rate is increased to 70%, the annual savings can reach about 8400 yuan.

·If the electricity price is 1 yuan/kWh, the annual savings can reach about 7900 yuan.

·If produced continuously for 24 hours (under high load), the annual savings can easily exceed 10000 yuan.

2. Investment payback period:

The purchase price of S22 transformer is usually about 30% -40% higher than that of S13. Assuming a price difference of 20000 to 30000 yuan, then:

Simple investment payback period ≈ price difference/annual cost savings ≈ 3-5 years

Considering that the retirement life of transformers is usually over 20 years, the electricity cost that can be saved throughout the entire lifecycle will exceed 100000 yuan, far exceeding the initial investment difference.

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