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The general structure of the electric traction system highlights the complexity and diversity of electrical equipment from the power supply. The return circuit, part of electric traction railway, consists of the running rails, the joint coils and the return feeder to the traction substation. Monitoring of the electrical equipment, existent in the electric traction railway, is a newest concept. The...
The paper aim is to analyze the way in which the electrical load influences the infrared thermal images of the thermal stresses of electrical equipment determined by using infrared thermography devices. In order to obtain a reliable result of the infrared investigations several conditions must be accomplished, such as good definition of the correction parameters and choosing the optimal environmental...
The paper describes how different parameters from vacuum circuit breaker influence the closing and opening time. Operational voltage, ambient temperature or hydraulic pressure can introduce delays in opening and closing the circuit breaker. These parameters are motorized through sensors that send all the data to a control unit. The control unit calculates the decision/(time) when to make controlled...
This paper refers to the magnetic actuator from vacuum circuit breaker. The actuator is one of the main component with functions for switching, latching and release. Due to the low quality of power supply of actuator, undesirable effects such as the delay during the operation of connecting or disconnecting the circuit breaker can result. As case of study to observe this delay was used a monopolar...
The traction current is returning to the supply source crossing the return circuit to the 25 kV single-phase AC power source. The return circuit consists of the running rails, which are connected by conductors to the joint coils terminals, and the return feeder to the traction substation. The connecting conductors (connection ropes) are subjected to thermal stresses due to the intense currents which...
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