Product description

The load factor of the 1250KVA oil-immersed transformer is calculated as follows:

1. The loss formula of the transformer

(1) Active loss: ΔP= P0 +KTβ2PK–(1)

(2) Reactive power loss: ΔQ= Q0 +KTβ2QK–(2)

Combined power loss:(3) ΔPZ= ΔP +KQΔQ–(3)

Q0≈I0%SN, QK≈UK%SN

Q0 – no-load loss (KVAR)

P0 – no-load loss (kW)

PK – rated load loss (kW)

SN – rated transformer capacity (kVA)

I0% – % of transformer no-load current1.2% – % of short-circuit voltage4

β—Average load factor

KT – Load Ripple Loss Factor

QK – Rated load leakage power (KVA)

KQ – Reactive Power (kW/1,000 Equivalent Economic Equivalent) Sales Tel: 13508930968

The selection criteria formula for each parameter is calculated:

(1) Take KT = 1.05;

(2) The step-down transformer of 6KV?10kV in the urban power grid and the industrial enterprise power grid with a minimum load system is reactive, equivalent to KQ = 0.1kW/kvar;

(3) The average load factor of the transformer is used for the preferred β = 20% for agricultural transformers; Industrial companies, in three shifts, preferably β = 75%;

Operating hours (4) transformer T = 8760h, maximum load loss time: T = 5500h;

(5) TRANSFORMER NO-LOAD LOSS P0 RATED LOAD LOSS PK, I0, UK%, SEE THE FOLLOWING PRODUCT INFORMATION.

2. Characteristics of transformer loss P0 – Load loss, iron loss, hysteresis loss and eddy current loss, hysteresis loss is proportional to frequency; Hysteresis of the power scale factor and the maximum magnetic flux density. Eddy current losses are proportional to frequency, maximum magnetic flux density of the three PCs of the laminated – The thickness of the load loss of the product is mainly the resistance loss on the winding through which the load current flows, which is generally known as copper loss. Its magnitude varies with the change (and expression) of the load current using the temperature of the load loss transformer using the standard coil temperature conversion value proportional to the load current, and is also affected by the square, and the leakage flux caused by the load current will produce eddy current losses within the windings, stray losses in the metal parts outside the windings. The total loss of the transformer ΔP= P0 + PC transformer loss ratio = PC / P0 transformer efficiency = PZ / (PZ + ΔP), expressed as a percentage; The output power of the secondary side of the PZ transformer.

Features of 1250KVA oil-immersed transformer:

1250KVA oil-immersed transformer is one of the main equipment of power plants and substations. The role of the transformer is multifaceted, not only can it increase the voltage and send the electrical energy to the electricity

region, the voltage can also be reduced to all levels of use voltage to meet the needs of electricity.

Transformer capacity and no-load load tester In short, the step-up and step-down must be done by the transformer. In the process of transmitting electric energy in the power system, there will inevitably be two parts of voltage and power loss, when the same power is transmitted, the voltage loss is inversely proportional to the voltage, and the power loss is inversely proportional to the square of the voltage. The pilot test Gaotse electrical uses a transformer to increase the voltage and reduce the transmission loss.

A transformer is made up of two or more coil windings wound around the same core,

The windings are connected by alternating magnetic fields and work according to the principle of electromagnetic induction. The installation location of the transformer should be considered to be convenient for operation, maintenance and transportation, and it should be safe and reliable

place. When using a transformer, the rated capacity of the transformer must be reasonably selected. When the transformer runs at no load, a large amount of reactive power is required.

This reactive power is supplied by the power supply system. If the capacity of the pilot high-test electrical transformer is too large, it not only increases the initial investment, but also transforms

The pressure is in no-load or light-load operation for a long time, so that the proportion of no-load loss increases, the power factor decreases, and the network loss increases, so that the operation is both uneconomical and unreasonable. If the transformer capacity is too small, the transformer will be overloaded for a long time and the equipment will be easily damaged. Therefore, the rated capacity of the transformer should be selected according to the needs of the electrical load, and should not be too large or too small. Sales Hotline: 13508930968