SEPCO ELECTRIC POWER CONSTRUCTION CORPORATION Electrical Operations Engineer Interview Questions and Answers

The Loto system stands for Lockout/Tagout, a safety procedure used to ensure that dangerous machines are properly shut off and not started up again during maintenance or servicing.

• Loto system involves locking the energy-isolating devices with individual lockout devices to prevent the machine from being turned on

• Tagout involves placing a tag on the locked device to indicate that it should not be operated

• Employees workin...read more

A DOL motor starter is a direct-on-line motor starter used to start and stop motors without any speed control.

• DOL stands for Direct-On-Line.

• It is the simplest and most common type of motor starter.

• It directly connects the motor to the power supply, providing full voltage at start.

• It does not provide any speed control or soft starting.

• DOL starters are typically used for small motors with low starting torque requirements...read more

An earth leakage circuit breaker is a safety device that detects and interrupts electrical leakage to earth.

• Also known as a ground fault circuit interrupter (GFCI)

• Protects against electric shock and fire hazards

• Monitors the current flowing through the circuit and trips if it detects a leakage to earth

• Commonly used in bathrooms, kitchens, and outdoor areas where water is present

HVDC is a technology used to transmit high voltage DC power over long distances. Offshore connections refer to power transmission from offshore wind farms.

• HVDC is more efficient than AC transmission over long distances

• Offshore connections require specialized equipment and installation techniques

• HVDC is used for offshore connections to transmit power from offshore wind farms to the mainland

• Examples of HVDC projects incl...read more

The process for a project involves planning, design, implementation, testing, and commissioning.

• Define project scope and objectives

• Create a project plan with timelines and milestones

• Design the system or product

• Procure necessary materials and equipment

• Implement the design and build the system or product

• Test the system or product to ensure it meets requirements

• Commission the system or product for use

• Provide ongoing suppo...read more

ATS stands for Automatic Transfer Switch. It is used to transfer power supply between two sources. Transformer and motor maintenance procedures and protection methods are essential for their efficient operation. SAP is a software used for enterprise resource planning.

• ATS is used to automatically switch power supply between two sources, ensuring uninterrupted power supply.

• Transformer maintenance involves regular inspect...read more

HT motor rating is the maximum power it can handle and FLC is the current it draws at full load.

• HT motor rating is expressed in kilowatts (kW) or megawatts (MW).

• FLC of HT motor is the full load current it draws at rated voltage and frequency.

• FLC is expressed in amperes (A) and varies depending on the motor's power rating and efficiency.

• For example, a 1 MW HT motor may have a FLC of 1000 A at 11 kV.

• The rating and FLC of...read more

Plant EHT system and single line diagram of plants.

• EHT system refers to Extra High Tension system used in power plants

• Single line diagram shows the electrical connections between different components

• It is important to have a clear and accurate diagram for safety and maintenance purposes