Schneider Electric Wiring Harness Design Engineer Interview Questions and Answers

Q1. HOW TO CALCULATE CT CURRENT
Ans. 
CT current can be calculated by dividing the primary current by the turns ratio of the current transformer.
• CT current = Primary current / Turns ratio

• Primary current is the current flowing through the primary conductor

• Turns ratio is the ratio of the number of turns in the primary winding to the number of turns in the secondary winding
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Q2. WHAT IS LOCKOUT REALY
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Lockout is a safety procedure used to ensure that machinery or equipment is properly shut off and cannot be restarted until maintenance or servicing is completed.
• Lockout involves isolating energy sources to prevent accidental startup.

• Lockout devices like padlocks and tags are used to physically lock equipment.

• Lockout procedures must be followed to prevent accidents and injuries.

• Examples of lockout include locking out e...read more
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Q3. WHAT IS IP65 FOR PANEL
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IP65 for panel refers to the level of protection against dust and water ingress.
• IP65 rating means the panel is dust tight and protected against water jets from any direction.

• The first digit '6' indicates the level of protection against solid objects like dust.

• The second digit '5' indicates the level of protection against water ingress.

• Commonly used in outdoor or industrial applications where the panel may be exposed to...read more
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Q4. What is TCS AND MASTER TRIP REALY
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TCS and Master Trip Relay are protective devices used in electrical systems to prevent damage during faults.
• TCS stands for Time Current Characteristic Relay, which operates based on the relationship between time and current to trip the circuit breaker during faults.

• Master Trip Relay is a relay that receives signals from various protective relays and initiates a trip signal to disconnect the circuit in case of a fault.

• B...read more
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Q5. WHAT IS LSC 2A AND LSC 2B
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LSC 2A and LSC 2B are standards for lighting in commercial and industrial buildings.
• LSC 2A and LSC 2B are part of the Lighting Power Density (LPD) requirements in building codes.

• LSC 2A is for commercial buildings while LSC 2B is for industrial buildings.

• They specify the maximum allowable power consumption for lighting per unit area in a building.

• For example, LSC 2A may require a maximum LPD of 0.9 watts per square foot
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Q6. What REF PROTECTION and HIgh impedance and low impedance
Ans. 
REF protection is used to prevent damage to equipment from electrical faults. High impedance protection is used for sensitive equipment, while low impedance protection is used for power systems.
• REF protection is used to detect ground faults and prevent damage to equipment.

• High impedance protection is used for sensitive equipment that requires high accuracy and low fault currents.

• Low impedance protection is used for pow...read more
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Q7. ANSI CODE FOR VERIOUS PROTECTION
Ans. 
ANSI codes are used to identify various types of protection devices in electrical systems.
• ANSI code 50/51 is for instantaneous overcurrent protection

• ANSI code 67 is for directional power protection

• ANSI code 87 is for differential protection

• ANSI code 59 is for overvoltage protection
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Q1. Motor selection for rotary table
Ans. 
Motor selection for rotary table involves considering torque requirements, speed, size constraints, and control system compatibility.
• Consider torque requirements for the rotary table based on load and acceleration/deceleration needs

• Select a motor with appropriate speed capabilities to meet the desired rotation speed

• Ensure the motor size fits within the constraints of the rotary table design

• Check compatibility with the ...read more
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Q2. Pneumatic cylinder selection
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Q1. I have been using blender for the past 2 years, so they asked how would I learn their 3d Software, i.e., 3Ds Max
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Making an animated clip from a reference video provided.

Q1. How would I adjust here in acooperate coming from a gaming background with no real work overlap.
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Q1. Questions about my process and skills in 3D modelling and Animation.
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Its was based on mechanical and solidworks aptitude test

Q1. What is difference between MCB &MCCB?
Ans. 
MCB is a miniature circuit breaker used for low currents, while MCCB is a molded case circuit breaker used for higher currents.
• MCB is designed for low currents, typically up to 100A, while MCCB is designed for higher currents, typically up to 2500A.

• MCB is a compact device with fixed trip settings, while MCCB is larger and has adjustable trip settings.

• MCB is commonly used in residential and commercial applications, whil...read more
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Q2. What is mean by relay and how it operates?
Ans. 
A relay is an electrically operated switch that uses an electromagnet to mechanically operate the switch contacts.
• Relays are used to control high power circuits with a low power signal.

• When the coil of the relay is energized, it creates a magnetic field that causes the switch contacts to close or open.

• Relays are commonly used in automotive applications, industrial controls, and home appliances.

• There are different types...read more
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Q1. How much current takes 1mm2 wire??
Ans. 
The amount of current that a 1mm2 wire can carry depends on various factors.
• The current carrying capacity of a wire depends on its material, temperature, and insulation.

• Copper wires typically have a higher current carrying capacity compared to aluminum wires.

• The current rating of a wire is usually specified by its manufacturer.

• The current carrying capacity can be affected by factors such as wire length and ambient temp...read more
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Q2. What is resistivity????
Ans. 
Resistivity is a measure of a material's ability to resist the flow of electric current.
• Resistivity is the inverse of conductivity.

• It is a property of a material that determines how strongly it resists the flow of electric current.

• Resistivity is measured in ohm-meters (Ω·m).

• Materials with high resistivity, such as rubber or glass, are insulators.

• Materials with low resistivity, such as copper or silver, are conductors.
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Q3. Drive Parameters???????
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Q4. Why do you want to join?????
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Q5. Panel wiring and testing
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Q1. Manufacturing knowledge read from the drawing
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Q2. Design and engineering knowledge
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Q3. Sheet metal work experience
Ans. 
I have 3 years of experience in sheet metal work, including designing and fabricating components for various projects.
• Experience in designing sheet metal components using CAD software

• Knowledge of different types of sheet metal materials and their properties

• Hands-on experience in fabricating sheet metal parts using various tools and techniques

• Ability to interpret engineering drawings and specifications accurately

• Experie...read more
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Q1. Previous employment details
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Q2. Salary discussion
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Q3. Company benefits
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Q1. Basic DOL diagram and drawing DOL Circuit
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Q2. How to select plc and cards
Ans. 
PLC and card selection depends on the application requirements and budget.
• Identify the required inputs and outputs

• Consider the communication protocols needed

• Evaluate the processing power and memory requirements

• Determine the budget and cost of ownership

• Research and compare different brands and models

• Consider the availability of technical support and spare parts

• Ensure compatibility with existing systems

• Consider the envir
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