Static electrical equipment
Jun 08, 2018

Distribution transformers, abbreviated as “distribution transformers”, refer to a static electrical appliance in a distribution system that transforms AC voltage and current according to the law of electromagnetic induction and transmits AC electrical energy. In some areas, power transformers with voltage levels below 35 kV (mostly 10KV and below) are referred to as “distribution transformers” or simply “distribution transformers”. The places and places where the "distribution" is installed are both substations. Distribution transformers should be installed on column or open floor. Described in detail its installation, installation precautions, distribution methods, capacity selection, operation and maintenance.

Distribution transformer refers to a static appliance used in a distribution system to convert AC voltage and current according to the law of electromagnetic induction and transmit AC energy. China's transformer products can generally be classified into UHV (750KV and above), UHV (500KV) transformers, 220-110KV transformers, and 35KV transformers. Distribution transformers usually refer to power transformers that operate in distribution networks with voltage levels of 10-35KV and capacity of 6,300KVA and below that directly supply power to end users.

Distribution power transformer is a kind of static electrical equipment, which is used to change a certain value of AC voltage (stream) into another voltage or voltage (current) with the same frequency. When the primary winding is connected to alternating current, alternating magnetic fluxes are generated. The alternating magnetic flux passes through the iron core and induces alternating current electromotive force in the secondary winding. The magnitude of the secondary induced electromotive force is related to the number of turns of a secondary winding, that is, the voltage magnitude is proportional to the number of turns. The main role is to transmit electrical energy, so rated capacity is its main parameter. The rated capacity is a conventional value of the performance power, which is characterized by the size of the transmitted power, expressed in kVA or MVA. When a rated voltage is applied to the transformer, the rated current that does not exceed the temperature rise limit under the specified conditions is determined. The more energy-efficient power transformer is an amorphous alloy core distribution transformer. Its biggest advantage is that the no-load loss value is extremely low. Ultimately, whether or not the no-load loss value is ensured is a central issue to be considered throughout the design process. When the product structure is arranged, in addition to considering that the amorphous alloy core itself is not affected by the external force, the characteristic parameters of the amorphous alloy must be accurately and reasonably selected during calculation.

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