APTRANSCO Awards ₹500 Crore Power Transformer Contract to TARIL for Grid Modernisation

The Transmission Corporation of Andhra Pradesh (APTRANSCO) has awarded a significant domestic contract worth up to ₹5 billion (₹500 crore) to Transformers & Rectifiers (India) Limited (TARIL) in August 2026. The order involves manufacturing extra-high-voltage power transformers to be delivered over a 13-month period. This procurement is a crucial part of Andhra Pradesh's grid modernisation programme, designed to accommodate green energy generation from Rayalaseema, support agricultural feeders, and supply uninterrupted power to industrial nodes in Orvakal and Krishnapatnam.

What Happened

In August 2026, the Transmission Corporation of Andhra Pradesh (APTRANSCO) issued a Letter of Intent to Transformers & Rectifiers (India) Limited (TARIL). The order encompasses the manufacturing of extra-high-voltage (EHV) power transformers. Valued between ₹100 crore and ₹500 crore (up to ₹5 billion), the contract provides the vendor a 13-month window for execution and delivery.

When & Where

The order was formalised in August 2026. The transformers will be integrated across the statewide transmission network in Andhra Pradesh. Specifically, the infrastructure targets the Rayalaseema region (for renewable energy evacuation) and coastal industrial corridors like Krishnapatnam, alongside Orvakal.

Who Is Involved

APTRANSCO: The state-owned electricity transmission utility of Andhra Pradesh, acting as the client.
Transformers & Rectifiers (India) Limited (TARIL): The Ahmedabad-headquartered electrical equipment manufacturer acting as the vendor.
State Government of Andhra Pradesh: The overarching authority driving the grid modernisation and green energy corridor initiatives.

How It Works

Capacity Assessment: APTRANSCO identifies bottlenecks in the current grid, particularly areas with high renewable energy generation (Rayalaseema) that face grid tripping.
Procurement: A tender is floated, and TARIL is awarded the contract to manufacture specialised extra-high-voltage (EHV) power transformers.
Manufacturing: TARIL will utilise its facilities (like the newly expanded Changodar plant) to build these heavy-duty transformers over 13 months.
Integration: The equipment is deployed at substations to step up or step down voltages, reducing transmission losses and stabilising the power flow to industrial nodes and agricultural feeders.

Why It Matters

Economic Impact: Reliable power supply to Orvakal and Krishnapatnam industrial nodes is critical for state GDP growth and attracting manufacturing investments.
Environmental Relevance: Upgraded transformers prevent grid congestion, allowing the state to seamlessly absorb intermittent solar and wind energy from Rayalaseema.
Syllabus Link: Highly relevant for APPSC Economy (Infrastructure) and UPSC GS Paper 3 (Infrastructure: Energy).

Historical Background

2003: The Electricity Act was passed, initiating massive reforms, unbundling state electricity boards, and allowing open access.
2014: The bifurcation of Andhra Pradesh required the reorganisation of the state's transmission utility, leading to the current form of APTRANSCO.
2020s: Andhra Pradesh aggressively pushed for Green Energy Corridors to handle the influx of massive solar parks in the Rayalaseema region.

Previous Related Events

June 2026: TARIL secured an "ultra-mega" order (worth over ₹1,000 crore) from the Power Grid Corporation of India Limited (PGCIL) for various transformers.
Early 2026: TARIL received orders from other state utilities like GETCO (Gujarat) and RRVPNL (Rajasthan), showcasing a nationwide push for grid upgrades.
Q1 FY27: TARIL reported a massive 218% YoY surge in order inflows, reflecting a boom in the domestic power infrastructure sector.

Static GK Connection

Constitutional Basis: Electricity is listed in the Concurrent List (List III) of the Seventh Schedule under Article 246, meaning both the Centre and AP State can legislate on it.
Step-up and Step-down Transformers: A scientific concept based on Faraday's Law of Electromagnetic Induction; EHV transformers step up voltage for long-distance transmission to minimise $I^2R$ power losses.

India & World Comparison

India runs one of the world's largest synchronous interconnected power grids. Upgrades at the state level (like APTRANSCO's) are critical to meeting India's global COP26 commitments of achieving 500 GW of non-fossil fuel capacity by 2030, as outdated grids cannot handle the variability of renewable sources.

Future Impact

August 2026 Target: TARIL expects to resolve manufacturing bottlenecks with the completion of its Changodar facility expansion (₹150 crore investment).
Late 2026 (Q2 FY27): TARIL aims to roll out a ₹900 crore to ₹1,000 crore backward integration programme to secure its supply chain.
Grid Stability: Over the next 1-2 years, Andhra Pradesh will witness reduced transmission losses and fewer outages in its critical agricultural and industrial zones.

🔑 Key Points for Revision

Contracting Party: APTRANSCO (Transmission Corporation of Andhra Pradesh).
Vendor: Transformers & Rectifiers (India) Limited (TARIL).
Order Value: Up to ₹5 billion (₹100 crore to ₹500 crore segment).
Execution Timeframe: 13 months for manufacturing and delivery.
Core Equipment: Extra-High-Voltage (EHV) power transformers.
Target Regions: Rayalaseema (renewables) and coastal corridors.
Industrial Beneficiaries: Orvakal and Krishnapatnam nodes.
Constitutional Link: Electricity is a Concurrent List subject (Article 246).
Governing Law: The Electricity Act of 2003 governs grid operations.
Corporate Data: TARIL’s unexecuted order book reached ₹6,630 crore in Q1 FY27.
Corporate Expansion: TARIL is investing ₹150 crore in its Changodar plant.
Backward Integration: Planned ₹900-1,000 crore investment by TARIL.
Scientific Principle: Transformers minimise power loss using high voltage transmission.
Environmental Link: Upgrades are essential for Green Energy Corridors.
Previous Major Client: Power Grid Corporation of India Limited (PGCIL).

🧠 Concept Link (Static GK Deep Dive)

Core Concept: Electrical Grid Modernisation & Transformers

Definition: The upgrading of power transmission networks using high-capacity transformers and smart technology to reduce losses and integrate renewable energy.
Constitutional / Legal Basis: Electricity Act, 2003; Concurrent List (Seventh Schedule, Article 246).
Scientific / Economic Principle: Transformers work on electromagnetic induction; transmitting power at extra-high voltage reduces current, thereby quadratically reducing heating losses ($I^2R$).
How it connects to this event: APTRANSCO is procuring EHV transformers to physically upgrade its transmission capacity for new energy sources.
Origin & History: The modern Indian grid system evolved post-independence, culminating in the "One Nation, One Grid, One Frequency" achievement in 2013. ⚠️ [SOURCE NEEDED]
Key milestone 1: The unbundling of State Electricity Boards into generation, transmission, and distribution entities under the 2003 Act.
Key milestone 2: Launch of the Green Energy Corridor project to synchronize renewable power with the conventional grid.
Related Acts / Schemes / Treaties: UDAY Scheme, Green Energy Corridor Scheme, Revamped Distribution Sector Scheme (RDSS). ⚠️ [SOURCE NEEDED]
Nodal Ministry / Body: Ministry of Power; Central Electricity Regulatory Commission (CERC) at the Centre, and SERCs at the state level.
India-specific relevance: India faces high Aggregate Technical & Commercial (AT&C) losses; EHV transformers are critical to resolving this.
Global comparison: Advanced grids in Europe use High-Voltage Direct Current (HVDC) extensively, a technology India is increasingly adopting for long-distance transmission.
Data point: TARIL's order book stands at ₹6,630 crore, indicating massive nationwide capital expenditure on power infrastructure.
Common exam angle: UPSC frequently asks about the integration challenges of renewable energy and the constitutional status of the power sector.
Easy memory hook: "EHV saves energy" — Extra High Voltage means lower current, fewer losses.

❓ Practice MCQs

Q1. Which state transmission corporation awarded the ₹5 billion power transformer order to TARIL in August 2026? [Easy]

A) GETCO

B) RRVPNL

C) APTRANSCO

D) TSTRANSCO

Answer: C

Explanation: APTRANSCO awarded the contract worth up to ₹500 crore to TARIL for extra-high-voltage transformers.

Q2. Under which schedule of the Indian Constitution is 'Electricity' listed? [Easy]

A) State List

B) Union List

C) Concurrent List

D) Residuary Powers

Answer: C

Explanation: Electricity is a subject under the Concurrent List of the Seventh Schedule (Article 246).

Q3. What is the stipulated execution timeline for the domestic contract awarded by APTRANSCO to TARIL? [Moderate]

A) 6 months

B) 13 months

C) 24 months

D) 30 months

Answer: B

Explanation: The execution of this domestic contract is scheduled to be completed within a 13-month timeline.

Q4. The new power transformers in Andhra Pradesh are primarily aimed at supporting dedicated industrial nodes located in: [Moderate]

A) Visakhapatnam and Kakinada

B) Orvakal and Krishnapatnam

C) Tirupati and Nellore

D) Amaravati and Vijayawada

Answer: B

Explanation: The procurement supports state grid modernisation, agriculture, and dedicated industrial nodes in Orvakal and Krishnapatnam.

Q5. Why is upgrading to extra-high-voltage (EHV) transformers critical for renewable energy integration in regions like Rayalaseema? [Moderate]

A) It directly converts solar energy into direct current.

B) It reduces transmission losses and prevents grid tripping caused by intermittent power generation.

C) It bypasses the requirements of the Electricity Act 2003.

D) It eliminates the need for agricultural feeders.

Answer: B

Explanation: High-capacity equipment reduces transmission losses, prevents grid tripping, and accommodates expanding variable solar and wind power.

Q6. Consider TARIL's business operations as of Q1 FY27. Which of the following statements is accurate regarding its order book and expansion plans? [Tricky]

A) The unexecuted order book was ₹2,114 crore, and it plans to invest ₹150 crore in backward integration.

B) The unexecuted order book stood at ₹6,630 crore, and it is expanding its Changodar facility with a ₹150 crore investment.

C) It received a ₹1,000 crore order from APTRANSCO to be delivered in 30 months.

D) The company experienced a 218% decline in order inflows year-on-year.

Answer: B

Explanation: TARIL maintained an unexecuted order book of ₹6,630 crore and is expanding its Changodar facility with an investment of ₹150 crore.

Q7. Which scientific principle explains the necessity of extra-high-voltage transformers in long-distance power grids? [Tricky]

A) Ohm's law dictates that higher voltage increases transmission line resistance.

B) Transmitting at high voltage allows for higher current, which cools the wires.

C) Transmitting power at a higher voltage reduces the current for the same power, thereby quadratically reducing $I^2R$ heating losses.

D) Transformers convert AC to DC to eliminate power loss over long distances.

Answer: C

Explanation: Step-up transformers increase voltage and reduce current, minimising the energy lost as heat ($I^2R$) over long distances.

Q8. The APTRANSCO order is classified under TARIL's 'Large Order' category. What valuation range defines this category? [Tricky]

A) ₹50 crore to ₹100 crore

B) ₹100 crore to ₹500 crore

C) ₹500 crore to ₹1,000 crore

D) Above ₹1,000 crore

Answer: B

Explanation: Under company policy, a 'Large Order' represents a project value ranging between ₹100 crore and ₹500 crore.

📜 Previous Year Question Style (PYQ)

PYQ 1:

With reference to the power transmission sector in India, which of the following best describes the primary function of a Green Energy Corridor?

A) To provide free electricity to agricultural feeders.

B) To establish dedicated coal-fired power plants near mining nodes.

C) To synchronise electricity produced from renewable sources with conventional power grids.

D) To privatise the transmission networks of State Electricity Boards.

Answer: C

Explanation: Green Energy Corridors are dedicated transmission networks designed to evacuate and integrate intermittent renewable energy into the national grid.

PYQ 2:

Consider the following statements regarding the electricity sector in India:

1. Electricity is a subject under the State List of the Seventh Schedule.
2. The unbundling of State Electricity Boards was a major reform mandated by the Electricity Act, 2003.
3. APTRANSCO acts solely as a power generation company in Andhra Pradesh.

Which of the above statements is/are correct?

A) 1 and 2 only

B) 2 only

C) 2 and 3 only

D) 1, 2 and 3

Answer: B

Explanation: Statement 1 is incorrect (Electricity is in the Concurrent List). Statement 2 is correct. Statement 3 is incorrect (APTRANSCO is a transmission utility, not a generation company).

PYQ 3:

Assertion (A): The integration of large-scale solar and wind power necessitates the continuous upgradation of grid infrastructure with extra-high-voltage transformers.

Reason (R): Renewable energy generation is often intermittent and geographically concentrated, which can cause grid instability and tripping without high-capacity transmission equipment.

Choose the correct option:

A) Both A and R are true, and R is the correct explanation of A.

B) Both A and R are true, but R is not the correct explanation of A.

C) A is true, but R is false.

D) A is false, but R is true.

Answer: A

Explanation: Intermittent power from renewables requires robust grid infrastructure like EHV transformers to prevent grid tripping and handle sudden surges or drops in power.

✍️ Mains Answer Pointers

Question 1 (150 words): Analyze the significance of upgrading state-level power transmission grids in achieving India’s renewable energy targets, with special reference to recent developments in Andhra Pradesh.

State-level grid modernisation is the backbone of India's transition towards renewable energy. Since electricity generation from sources like solar and wind is inherently intermittent and geographically concentrated, legacy transmission networks often face grid congestion and tripping. Upgrading to extra-high-voltage (EHV) equipment is critical to resolving these technical bottlenecks.

In Andhra Pradesh, the recent ₹500 crore contract awarded by APTRANSCO to TARIL for high-capacity transformers exemplifies this necessary shift. By deploying this infrastructure over the next 13 months, the state aims to seamlessly evacuate solar and wind power generated in the Rayalaseema region into the broader grid. This not only prevents energy wastage but also ensures reliable, uninterrupted power supply to dedicated industrial nodes like Orvakal and Krishnapatnam, fostering economic growth. Ultimately, robust state grids are a prerequisite for accommodating green energy corridors and meeting India's broader climate commitments.

Question 2 (250 words): "The modernisation of power infrastructure is not merely a technical necessity but a catalyst for regional industrial development." Discuss this statement in the context of the Electricity Act 2003 and recent infrastructure investments by state utilities.

The Electricity Act of 2003 fundamentally transformed India's power sector by unbundling State Electricity Boards and promoting competition, laying the statutory foundation for modernising grid infrastructure. Today, upgrading power transmission networks is not just about reducing Aggregate Technical & Commercial (AT&C) losses; it is an essential catalyst for equitable regional industrialisation and sustainable development.

Technically, legacy grids struggle to manage the variable load introduced by modern renewable sources. Recent investments, such as APTRANSCO's ₹500 crore order to TARIL for extra-high-voltage transformers, address this exact challenge. By modernising the grid over a 13-month execution timeline, state utilities can prevent grid tripping and reduce power losses over long distances. This technical stability directly supports the integration of green energy corridors, allowing regions with high solar potential, like Rayalaseema, to effectively export their power.

Economically, reliable power infrastructure acts as a magnet for manufacturing investments. The APTRANSCO upgrade specifically targets uninterrupted supply to dedicated industrial nodes in Orvakal and Krishnapatnam, alongside critical agricultural feeders. Uninterrupted power lowers the operational costs for industries and agricultural units alike, boosting state GDP and employment. Furthermore, the massive capital expenditure—reflected in vendor TARIL’s ₹6,630 crore order book—stimulates the domestic heavy electrical manufacturing sector.

Going forward, policymakers must ensure that state utilities maintain financial health to sustain these capital-intensive upgrades. Implementing smart grid technologies alongside hardware improvements will be essential to future-proof India's industrial corridors and meet national energy security goals.

⚠️ Examiner Trap

Trap 1: Students often confuse the core function of APTRANSCO with power generation. The correct fact is APTRANSCO is solely a transmission utility, not a generation or distribution entity.
Trap 2: A common wrong assumption is that Electricity falls under the State List since state utilities manage it. The reality is Electricity is a Concurrent List subject (Article 246) allowing both Central and State jurisdiction.
Trap 3: Many students miss the exact financial classification when answering questions on this specific order. Always remember TARIL classifies this ₹100–500 crore order as a 'Large Order', whereas orders above ₹1,000 crore (like their PGCIL order) are 'Ultra-Mega'.

🧭 Exam Tip

Prelims: Focus on direct facts: the timeline (13 months), the nodal bodies (APTRANSCO, TARIL), the industrial nodes involved (Orvakal, Krishnapatnam), and the constitutional status of electricity.
Mains: Use this specific ₹500 crore APTRANSCO case study in GS Paper 3 answers to illustrate the physical infrastructure required to support Green Energy Corridors and industrial expansion.
Interview: Be prepared to discuss the challenges of integrating intermittent renewable energy into legacy grids and the financial health of state transmission utilities.
Prediction: Expect a statement-based PYQ-style question linking renewable energy evacuation (like in Rayalaseema) to the necessity of heavy grid investments.

APTRANSCO Awards ₹500 Crore Power Transformer Contract to TARIL for Grid Modernisation

What Happened

When & Where

Who Is Involved

APTRANSCO: The state-owned electricity transmission utility of Andhra Pradesh, acting as the client.
Transformers & Rectifiers (India) Limited (TARIL): The Ahmedabad-headquartered electrical equipment manufacturer acting as the vendor.
State Government of Andhra Pradesh: The overarching authority driving the grid modernisation and green energy corridor initiatives.

How It Works

Capacity Assessment: APTRANSCO identifies bottlenecks in the current grid, particularly areas with high renewable energy generation (Rayalaseema) that face grid tripping.
Procurement: A tender is floated, and TARIL is awarded the contract to manufacture specialised extra-high-voltage (EHV) power transformers.
Manufacturing: TARIL will utilise its facilities (like the newly expanded Changodar plant) to build these heavy-duty transformers over 13 months.
Integration: The equipment is deployed at substations to step up or step down voltages, reducing transmission losses and stabilising the power flow to industrial nodes and agricultural feeders.

Why It Matters

Economic Impact: Reliable power supply to Orvakal and Krishnapatnam industrial nodes is critical for state GDP growth and attracting manufacturing investments.
Environmental Relevance: Upgraded transformers prevent grid congestion, allowing the state to seamlessly absorb intermittent solar and wind energy from Rayalaseema.
Syllabus Link: Highly relevant for APPSC Economy (Infrastructure) and UPSC GS Paper 3 (Infrastructure: Energy).

Historical Background

2003: The Electricity Act was passed, initiating massive reforms, unbundling state electricity boards, and allowing open access.
2014: The bifurcation of Andhra Pradesh required the reorganisation of the state's transmission utility, leading to the current form of APTRANSCO.
2020s: Andhra Pradesh aggressively pushed for Green Energy Corridors to handle the influx of massive solar parks in the Rayalaseema region.

Previous Related Events

June 2026: TARIL secured an "ultra-mega" order (worth over ₹1,000 crore) from the Power Grid Corporation of India Limited (PGCIL) for various transformers.
Early 2026: TARIL received orders from other state utilities like GETCO (Gujarat) and RRVPNL (Rajasthan), showcasing a nationwide push for grid upgrades.
Q1 FY27: TARIL reported a massive 218% YoY surge in order inflows, reflecting a boom in the domestic power infrastructure sector.

Static GK Connection

Constitutional Basis: Electricity is listed in the Concurrent List (List III) of the Seventh Schedule under Article 246, meaning both the Centre and AP State can legislate on it.
Step-up and Step-down Transformers: A scientific concept based on Faraday's Law of Electromagnetic Induction; EHV transformers step up voltage for long-distance transmission to minimise $I^2R$ power losses.

India & World Comparison

Future Impact

August 2026 Target: TARIL expects to resolve manufacturing bottlenecks with the completion of its Changodar facility expansion (₹150 crore investment).
Late 2026 (Q2 FY27): TARIL aims to roll out a ₹900 crore to ₹1,000 crore backward integration programme to secure its supply chain.
Grid Stability: Over the next 1-2 years, Andhra Pradesh will witness reduced transmission losses and fewer outages in its critical agricultural and industrial zones.

🔑 Key Points for Revision

Contracting Party: APTRANSCO (Transmission Corporation of Andhra Pradesh).
Vendor: Transformers & Rectifiers (India) Limited (TARIL).
Order Value: Up to ₹5 billion (₹100 crore to ₹500 crore segment).
Execution Timeframe: 13 months for manufacturing and delivery.
Core Equipment: Extra-High-Voltage (EHV) power transformers.
Target Regions: Rayalaseema (renewables) and coastal corridors.
Industrial Beneficiaries: Orvakal and Krishnapatnam nodes.
Constitutional Link: Electricity is a Concurrent List subject (Article 246).
Governing Law: The Electricity Act of 2003 governs grid operations.
Corporate Data: TARIL’s unexecuted order book reached ₹6,630 crore in Q1 FY27.
Corporate Expansion: TARIL is investing ₹150 crore in its Changodar plant.
Backward Integration: Planned ₹900-1,000 crore investment by TARIL.
Scientific Principle: Transformers minimise power loss using high voltage transmission.
Environmental Link: Upgrades are essential for Green Energy Corridors.
Previous Major Client: Power Grid Corporation of India Limited (PGCIL).

🧠 Concept Link (Static GK Deep Dive)

Core Concept: Electrical Grid Modernisation & Transformers

Definition: The upgrading of power transmission networks using high-capacity transformers and smart technology to reduce losses and integrate renewable energy.
Constitutional / Legal Basis: Electricity Act, 2003; Concurrent List (Seventh Schedule, Article 246).
Scientific / Economic Principle: Transformers work on electromagnetic induction; transmitting power at extra-high voltage reduces current, thereby quadratically reducing heating losses ($I^2R$).
How it connects to this event: APTRANSCO is procuring EHV transformers to physically upgrade its transmission capacity for new energy sources.
Origin & History: The modern Indian grid system evolved post-independence, culminating in the "One Nation, One Grid, One Frequency" achievement in 2013. ⚠️ [SOURCE NEEDED]
Key milestone 1: The unbundling of State Electricity Boards into generation, transmission, and distribution entities under the 2003 Act.
Key milestone 2: Launch of the Green Energy Corridor project to synchronize renewable power with the conventional grid.
Related Acts / Schemes / Treaties: UDAY Scheme, Green Energy Corridor Scheme, Revamped Distribution Sector Scheme (RDSS). ⚠️ [SOURCE NEEDED]
Nodal Ministry / Body: Ministry of Power; Central Electricity Regulatory Commission (CERC) at the Centre, and SERCs at the state level.
India-specific relevance: India faces high Aggregate Technical & Commercial (AT&C) losses; EHV transformers are critical to resolving this.
Global comparison: Advanced grids in Europe use High-Voltage Direct Current (HVDC) extensively, a technology India is increasingly adopting for long-distance transmission.
Data point: TARIL's order book stands at ₹6,630 crore, indicating massive nationwide capital expenditure on power infrastructure.
Common exam angle: UPSC frequently asks about the integration challenges of renewable energy and the constitutional status of the power sector.
Easy memory hook: "EHV saves energy" — Extra High Voltage means lower current, fewer losses.

❓ Practice MCQs

Q1. Which state transmission corporation awarded the ₹5 billion power transformer order to TARIL in August 2026? [Easy]

A) GETCO

B) RRVPNL

C) APTRANSCO

D) TSTRANSCO

Answer: C

Explanation: APTRANSCO awarded the contract worth up to ₹500 crore to TARIL for extra-high-voltage transformers.

Q2. Under which schedule of the Indian Constitution is 'Electricity' listed? [Easy]

A) State List

B) Union List

C) Concurrent List

D) Residuary Powers

Answer: C

Explanation: Electricity is a subject under the Concurrent List of the Seventh Schedule (Article 246).

Q3. What is the stipulated execution timeline for the domestic contract awarded by APTRANSCO to TARIL? [Moderate]

A) 6 months

B) 13 months

C) 24 months

D) 30 months

Answer: B

Explanation: The execution of this domestic contract is scheduled to be completed within a 13-month timeline.

Q4. The new power transformers in Andhra Pradesh are primarily aimed at supporting dedicated industrial nodes located in: [Moderate]

A) Visakhapatnam and Kakinada

B) Orvakal and Krishnapatnam

C) Tirupati and Nellore

D) Amaravati and Vijayawada

Answer: B

Explanation: The procurement supports state grid modernisation, agriculture, and dedicated industrial nodes in Orvakal and Krishnapatnam.

Q5. Why is upgrading to extra-high-voltage (EHV) transformers critical for renewable energy integration in regions like Rayalaseema? [Moderate]

A) It directly converts solar energy into direct current.

B) It reduces transmission losses and prevents grid tripping caused by intermittent power generation.

C) It bypasses the requirements of the Electricity Act 2003.

D) It eliminates the need for agricultural feeders.

Answer: B

Explanation: High-capacity equipment reduces transmission losses, prevents grid tripping, and accommodates expanding variable solar and wind power.

Q6. Consider TARIL's business operations as of Q1 FY27. Which of the following statements is accurate regarding its order book and expansion plans? [Tricky]

A) The unexecuted order book was ₹2,114 crore, and it plans to invest ₹150 crore in backward integration.

B) The unexecuted order book stood at ₹6,630 crore, and it is expanding its Changodar facility with a ₹150 crore investment.

C) It received a ₹1,000 crore order from APTRANSCO to be delivered in 30 months.

D) The company experienced a 218% decline in order inflows year-on-year.

Answer: B

Explanation: TARIL maintained an unexecuted order book of ₹6,630 crore and is expanding its Changodar facility with an investment of ₹150 crore.

Q7. Which scientific principle explains the necessity of extra-high-voltage transformers in long-distance power grids? [Tricky]

A) Ohm's law dictates that higher voltage increases transmission line resistance.

B) Transmitting at high voltage allows for higher current, which cools the wires.

C) Transmitting power at a higher voltage reduces the current for the same power, thereby quadratically reducing $I^2R$ heating losses.

D) Transformers convert AC to DC to eliminate power loss over long distances.

Answer: C

Explanation: Step-up transformers increase voltage and reduce current, minimising the energy lost as heat ($I^2R$) over long distances.

Q8. The APTRANSCO order is classified under TARIL's 'Large Order' category. What valuation range defines this category? [Tricky]

A) ₹50 crore to ₹100 crore

B) ₹100 crore to ₹500 crore

C) ₹500 crore to ₹1,000 crore

D) Above ₹1,000 crore

Answer: B

Explanation: Under company policy, a 'Large Order' represents a project value ranging between ₹100 crore and ₹500 crore.

📜 Previous Year Question Style (PYQ)

PYQ 1:

With reference to the power transmission sector in India, which of the following best describes the primary function of a Green Energy Corridor?

A) To provide free electricity to agricultural feeders.

B) To establish dedicated coal-fired power plants near mining nodes.

C) To synchronise electricity produced from renewable sources with conventional power grids.

D) To privatise the transmission networks of State Electricity Boards.

Answer: C

Explanation: Green Energy Corridors are dedicated transmission networks designed to evacuate and integrate intermittent renewable energy into the national grid.

PYQ 2:

Consider the following statements regarding the electricity sector in India:

Which of the above statements is/are correct?

A) 1 and 2 only

B) 2 only

C) 2 and 3 only

D) 1, 2 and 3

Answer: B

Explanation: Statement 1 is incorrect (Electricity is in the Concurrent List). Statement 2 is correct. Statement 3 is incorrect (APTRANSCO is a transmission utility, not a generation company).

PYQ 3:

Assertion (A): The integration of large-scale solar and wind power necessitates the continuous upgradation of grid infrastructure with extra-high-voltage transformers.

Reason (R): Renewable energy generation is often intermittent and geographically concentrated, which can cause grid instability and tripping without high-capacity transmission equipment.

Choose the correct option:

A) Both A and R are true, and R is the correct explanation of A.

B) Both A and R are true, but R is not the correct explanation of A.

C) A is true, but R is false.

D) A is false, but R is true.

Answer: A

Explanation: Intermittent power from renewables requires robust grid infrastructure like EHV transformers to prevent grid tripping and handle sudden surges or drops in power.

✍️ Mains Answer Pointers

⚠️ Examiner Trap

Trap 1: Students often confuse the core function of APTRANSCO with power generation. The correct fact is APTRANSCO is solely a transmission utility, not a generation or distribution entity.
Trap 2: A common wrong assumption is that Electricity falls under the State List since state utilities manage it. The reality is Electricity is a Concurrent List subject (Article 246) allowing both Central and State jurisdiction.
Trap 3: Many students miss the exact financial classification when answering questions on this specific order. Always remember TARIL classifies this ₹100–500 crore order as a 'Large Order', whereas orders above ₹1,000 crore (like their PGCIL order) are 'Ultra-Mega'.

🧭 Exam Tip

Prelims: Focus on direct facts: the timeline (13 months), the nodal bodies (APTRANSCO, TARIL), the industrial nodes involved (Orvakal, Krishnapatnam), and the constitutional status of electricity.
Mains: Use this specific ₹500 crore APTRANSCO case study in GS Paper 3 answers to illustrate the physical infrastructure required to support Green Energy Corridors and industrial expansion.
Interview: Be prepared to discuss the challenges of integrating intermittent renewable energy into legacy grids and the financial health of state transmission utilities.
Prediction: Expect a statement-based PYQ-style question linking renewable energy evacuation (like in Rayalaseema) to the necessity of heavy grid investments.