Transformer losses are produced by the electrical current flowing in the coils and the magnetic field alternating in the core. The losses associated with the coils are called the load losses, while the losses produced in the core are called no-load losses.

A transformer is a derive used for stepping up or stepping down the AC voltages . Sources of energy loss in transformers are due to (I ) copper loss (ii ) Magnetic flux linkage loss , (iii ) Hysteresis loss and (iv ) eddy current loss.

Although transformers are very efficient devices, small energy losses do occur in them due to four main causes: Resistance of windings – the low resistance copper wire used for the windings still has resistance and thereby contribute to heat loss. The eddy currents cause heat loss. …

Common causes include allergies and asthma, anemia, cancer and its treatments, chronic pain, heart disease, infection, depression, eating disorders, grief, sleeping disorders, thyroid problems, medication side effects, alcohol use, or drug use. Patterns and symptoms of lack of energy may help you discover its cause.

Methods to reduce the energy loss in transformer:

1. Use of low resistance wire for the winding of the coil.
2. Heat loss due to eddy current can be reduced by the lamination of the iron core.
3. The heat generated can be kept to a minimum by using a magnetic material which has a low hysteresis loss.

Therefore to reduce the iron losses in a transformer, the core should be made of a material having high permeability and high resistivity since high permeability helps in carrying high magnetic flux and high resistivity helps out by preventing eddy currents by providing low conductivity.

Transformers are especially susceptible to overheating because as they step up or step down voltage levels between circuits, energy is lost as heat in the core and windings. That heat can build up damaging insulation and leading to transformer failure.

Definition: All day efficiency means the power consumed by the transformer throughout the day. It is defined as the ratio of output power to the input power in kWh or wh of the transformer over 24 hours. Mathematically, it is represented as. All-day efficiency of the transformer depends on their load cycle.

Like any other equipment its efficiency is calculated as the ratio of output power and input power. As transformer operates on the magnetizing phenomenon and it has no rotating parts, its efficiency is very high.

All Day Efficiency = Output (in kWh) / Input (in kWh) To understand about the all day efficiency, we must know about the load cycle i.e. how much load is connected for how much time (in 24 hours). You may also read: Current Transformers (CT) – Types, Characteristic & Applications.

Maximum Efficiency Condition of a Transformer In equation (1), the numerator is constant and the transformer efficiency will be maximum if the denominator with respect to the variable I2 is equated to zero. Thus, the transformer will give the maximum efficiency when their copper loss is equal to the iron loss.

ABB recently set the world record for electrical synchronous motor efficiency. During factory acceptance tests (FATs) carried out with the customer present, we recorded a result of 99.05% full load efficiency on a 44 megawatt, 6-pole, synchronous motor.