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https://grouper.ieee.org/groups/transformers/subcommittees/distr/EnergyEfficiency/S19-DistributionTransformerLoadingIssues&DominionR5.pdf
Customers per Three-Phase Pad-Mount Transformer by kVA Size. Mode: 1 cust/trf Mode: 1 cust/trf Mode: 1 cust/trf 750 kVA 1500 kVA. Annual Load Factor: Average Annual Load / Peak Annual Load. 4/16/2019 DOMINION ENERGY DISTRIBUTION TRANSFORMER LOADING21. 4/16/2019 DOMINION ENERGY DISTRIBUTION TRANSFORMER LOADING22.
https://www.electricalclassroom.com/transformer-kva-calculator/
kVA calculation. To calculate the kVA we need to know at least the line-to-line voltage (V) requirement of the load and the maximum load phase current (I). For a single-phase transformer, kVA = (V x I) /1000. For a Three-phase transformer, kVA = (√3 x V x I) /1000 = (1.732 x V x I) /1000.
https://www.alfatransformer.com/transformer_calculator.php
Transformers are sized by determining the total load required (in amps). Transformer capacity is rated in KVA (kilo-volt-amperes). The load voltage and load amps must be known to calculate KVA rating. * NOTE: We do not recommend loading a transformer above 80% of its KVA rating. When the KVA rating has been calculated, divide that number by 0.8 ...
http://ijcee.org/papers/399-E1044.pdf
Standard transformer losses are shown in Table I. Fig.2(a). Load Curve Units (kWh) Fig.2(b). Load Curve kVA TABLE I: STANDARD TRANSFORMER LOSSES Sl. No. Transformer rating kVA Wi (W) Wc (W) 1. 100 350 2500 2. 200 570 3300 3. 315 800 4600 4. 5001100 6500 5. 10001800 11000 6. 20003000 20000 All are oil immersed transformers. Overall transformer
https://www.copper.org/environment/sustainable-energy/transformers/education/trans_life_cycle.html
Load losses, on the other hand, are variable and directly proportional to the load on the transformer, typically being stated at the full-rated nameplate loading. If the A and B values are not known, as is typical of smaller users, merely use the load loss and no-load loss in watts, multiplying each by the relevant hours and cost per kWh.
https://www.csemag.com/articles/selecting-and-sizing-transformers-to-achieve-energy-efficiency/
With the transformer losses, you can convert the power losses into dollars lost by reviewing the transformer operating time and utility costs in kilowatt hours. Multiply the transformer total power losses by the number of hours a day the transformer will be operational, along with 365 days per year and the utility rate–$0.09/kWh was used for this calculation.
https://www.electrical4u.net/transformer/transformer-power-conversion-calculator-w-kw-mw/
Transformer real power P (MW) in Mega Watts is equal to the power factor times of the MVA rating of the transformer. P (MVA) = S (MVA) x pf. Example: A transformer name plate details are 15kW, 0.86 pf, 440V. Calculate the rated real power of the transformer. P (kW) = …
https://www.electronicspoint.com/forums/threads/kwh-to-kva-conversion.163215/
Using 46,951 kWh in a steady, continuous load for 30 day billing cycle of the utility (720 hours), would mean your load draws 46951 kWh / 720 h => 65.2 kW. If it runs at a 0.9 power factor, that would be 65.2 kW/ 0.9 => 72.5 kVA. But if it uses those 46,951 kWh by running only 1/3 of the time, then 1/3 of 720 hours is only 240 hours.
https://www.electricaltechnology.org/2013/07/how-to-calculatefind-rating-of.html
P=V x I (Primary voltage x primary current) P = 11000V x 5.25A = 57,750 VA = 57.75kVA. Or P = V x I (Secondary voltages x Secondary Current) P= 415V x 139.1A = 57,726 VA = 57.72kVA. Once again, we noticed that the rating of Transformer (on Nameplate) is …
https://www.rapidtables.com/calc/electric/kWh_to_kW_Calculator.html
KWh to kW calculation. The power P in kilowatts (kW) is equal to the energy E in kilowatt-hours (kWh), divided by the consumption time period t in hours (h): P(kW) = E(kWh) / t(h) kWh to kW calculation .
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