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A thyristor is a semiconductor device that acts as a switch and can handle high voltages and currents.
It has three terminals: anode, cathode, and gate
It can be turned on by applying a small current to the gate terminal
It can handle high power and is commonly used in power control applications
Examples include AC motor speed control, lighting dimming, and power supplies
I applied via Company Website and was interviewed before Oct 2023. There were 2 interview rounds.
I am a dedicated and experienced Electrical Engineer with a passion for problem-solving and innovation.
Graduated with a degree in Electrical Engineering from XYZ University
Completed internships at ABC Company and DEF Corporation
Proficient in CAD software and circuit design
Led a team in developing a new power distribution system for a commercial building
I applied via Walk-in and was interviewed before Jul 2023. There were 2 interview rounds.
I applied via Referral and was interviewed before Aug 2021. There was 1 interview round.
DC motors use direct current to generate rotational motion, while AC motors use alternating current.
DC motors have a commutator and brushes to switch the current direction
AC motors have a stator and rotor to create a rotating magnetic field
DC motors are commonly used in household appliances and electric vehicles
AC motors are commonly used in industrial machinery and HVAC systems
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Composite error and ratio error are two types of errors in current transformers.
Composite error is the combination of ratio error and phase angle error in a current transformer.
Ratio error is the difference between the actual turns ratio and the specified turns ratio of a current transformer.
Phase angle error is the angular difference between the primary and secondary currents of a current transformer.
Composite error a...
An AC drive circuit diagram controls the speed of an AC motor by varying the frequency and voltage of the power supplied to it.
An AC drive consists of a rectifier, DC link, inverter, and control circuitry.
The rectifier converts AC power to DC power, which is stored in the DC link.
The inverter converts the DC power back to AC power with variable frequency and voltage.
The control circuitry adjusts the frequency and volta...
A single line diagram of a distribution system is required with proper specifications.
The diagram should show the flow of power from the source to the load
It should include all components such as transformers, switchgear, and cables
The specifications should include voltage levels, power ratings, and protection devices
The diagram should follow standard symbols and conventions
Example: A 11 kV distribution system with a 5
Dewpoint test is done in transformer to check the moisture content in the insulation oil.
Moisture in insulation oil can cause breakdown of transformer insulation
Dewpoint test helps to determine the moisture content in the oil
It is a preventive maintenance measure to avoid transformer failure
The test involves cooling a mirror until dew forms on it, and measuring the temperature at which dew forms
Power transformers are used in transmission systems to step up or down voltage, while distribution transformers are used in distribution systems to step down voltage.
Power transformers are used in high voltage transmission systems to step up or down voltage for long distance transmission.
Distribution transformers are used in low voltage distribution systems to step down voltage for local distribution.
Power transformers...
Buchholz relay is used to protect transformers from faults by detecting gas and oil flow abnormalities.
Buchholz relay is installed in the pipe connecting the transformer tank and conservator tank.
It operates based on the principle that faults in the transformer generate gases and cause oil flow disturbances.
When gas or oil flow abnormalities occur, the relay trips and sends a signal to the control panel to isolate the ...
posted on 14 Sep 2022
I applied via Approached by Company and was interviewed before Sep 2021. There was 1 interview round.
I applied via Company Website and was interviewed in Nov 2020. There were 3 interview rounds.
posted on 27 Jun 2023
I applied via Recruitment Consulltant and was interviewed in May 2023. There were 3 interview rounds.
posted on 4 Nov 2023
I applied via LinkedIn and was interviewed in Oct 2023. There were 2 interview rounds.
An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.
Induction motors are commonly used in various applications such as industrial machinery, pumps, fans, and compressors.
They do not require brushes to transfer power to the rotor, making them more reliable and maintenance-free compared to brushed DC motors.
The speed of an induction motor is determined by the frequen...
A DC series motor is a type of DC motor where the field winding is connected in series with the armature winding.
Field winding and armature winding are connected in series
High starting torque but low speed
Used in applications where high starting torque is required, such as in traction applications
I applied via Company Website and was interviewed in Feb 2022. There was 1 interview round.
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