Transformers

Our electrical specialists keep the backbone of railways operating

Generators produce electricity with an extremely high voltage.
Transformers convert it to a voltage that can be used by railway equipment and in stations. They also play a crucial role in the handling of faults: when a fault occurs in one piece of equipment, the transformer shuts off the power supply to that equipment, preventing the damage from spreading to other equipment. Transformers' role in ensuring a continuous power supply and protecting equipment from damage makes them the backbone of a railway's electrical equipment. TEMS assigns electrical specialists to each transformer. Our specialists inspect equipment such as the converters that convert the voltage to suit each purpose and the circuit breakers that shut off the power supply and carry out repairs with the high degree of accuracy that is required to ensure reliable operation of every transformer.

Inspections

Inspections of special high-voltage circuit breakers

Special high-voltage circuit breakers are used to shut off abnormal power supplies rapidly. As transformers handle power with an extremely high voltage—over 7,000V—a fault could severely damage other equipment. TEMS carries out inspections on a daily basis to ensure that the protective equipment will work exactly as it should in the event of a fault.

Inspections of high-speed DC circuit breakers

High-speed DC circuit breakers are used in the event of a fault on the tracks.
These quickly disconnect the affected area of the train line from the transformer to prevent damage from spreading to other equipment. TEMS carries out regular inspections of all of our customers' high-speed DC circuit breakers.

Interaction testing

During interaction testing, circuit breakers are activated and deactivated from the switchboard. At the end of each inspection of our customers' circuit breakers, a command is sent from the switchboard to check that the circuit breaker works correctly. This is a crucial part of how we contribute to the reliable operation of the railways we serve.