Speed Engineering Solutions Senior Electrical Design Engineer Interview Questions, Process, and Tips

CT burdens refer to the impedance or resistance that a current transformer (CT) presents to the secondary circuit.

• CT burdens are typically expressed in ohms and represent the load that the CT must drive.

• The burden impedance can affect the accuracy of the CT's output signal.

• Common CT burdens include resistors, relays, meters, and other devices connected to the CT's secondary circuit.

• It is important to match the CT burde...read more

CT and PT are electrical devices used for measuring current and voltage in power systems.

• CT stands for Current Transformer and is used to measure high currents by stepping down the current to a lower value.

• PT stands for Potential Transformer and is used to measure high voltages by stepping down the voltage to a lower value.

• CTs and PTs are commonly used in power distribution systems to provide accurate measurements for

The factor of wire selection is determined by the current carrying capacity, voltage rating, insulation material, and environmental conditions.

• Current carrying capacity: Ensure the wire can handle the maximum current without overheating.

• Voltage rating: Select a wire with a voltage rating higher than the system voltage.

• Insulation material: Choose the appropriate insulation material based on temperature and environmental...read more

Selection of circuit breaker type depends on various factors such as voltage, current rating, breaking capacity, and application.

• Consider the voltage level - low voltage, medium voltage, high voltage

• Determine the current rating - thermal and magnetic settings

• Evaluate the breaking capacity - short circuit withstand capability

• Analyze the application - industrial, commercial, residential

• Types of circuit breakers include M