Electrical Grids in the Philippines

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What is the standard voltage for transmission lines in the Visayas and Mindanao grids?

138 kV (correct)

230 kV

115 kV

69 kV

How tall are the typical lattice towers or steel poles for 138 kV transmission lines?

5-10 meters

10-15 meters

21-29 meters (correct)

30-40 meters

What type of towers are used for 69 kV transmission/subtransmission lines?

Medium-size poles

Steel poles

Lattice towers

Hframe towers (correct)

Where are 60-138 kV transmission lines typically located according to the National Transmission Corporation (TransCo)?

Visayas Signup and view all the answers

In which regions are medium-size poles and Hframe towers commonly used?

Visayas and Mindanao Signup and view all the answers

What is the highest voltage level used in the Philippine transmission grids?

500 kV Signup and view all the answers

How are the Luzon and Visayas Grids interconnected?

Via a 350 kV HVDC line Signup and view all the answers

What voltage level do off-grid islands in the Philippines typically operate at?

69 kV Signup and view all the answers

Who operates and maintains the transmission system and related facilities in the Philippines?

National Grid Corporation of the Philippines (NGCP) Signup and view all the answers

What voltage levels are typically found in distribution networks in the Philippines?

7.97/13.8 kV or 20/34.5 kV Signup and view all the answers

Which grid in the Philippines remains isolated until a planned HVDC link completion?

Mindanao Grid Signup and view all the answers

What is the standard supply voltage for homes and small businesses and industries?

230 V Signup and view all the answers

Where are nonstandard voltages like 350 kV used?

HVDC Leyte-Luzon transmission line and submarine cable Signup and view all the answers

Which type of transformer supplies voltage to large commercial/industrial consumers?

3-phase transformer Signup and view all the answers

How are the 254/440 V lines usually connected?

Directly to a single building Signup and view all the answers

Which company's distribution network in Cebu uses the 13.2/23 kV voltage?

VECO Signup and view all the answers

What is the voltage supplied to high rise buildings?

127/220 V Signup and view all the answers

What is the standard voltage used mostly for distribution by Meralco in its coverage area?

20/34.5 kV Signup and view all the answers

Where is the 7.97/13.8 kV distribution voltage commonly used?

Both A and B Signup and view all the answers

What type of poles are typically used for the 20/34.5 kV distribution network?

Medium-size poles Signup and view all the answers

Where are step-down transformers normally mounted in the distribution networks?

On poles Signup and view all the answers

What is the standard voltage used for wind farms to collect power from each turbine?

7.97/13.8 kV Signup and view all the answers

In what locations are smaller poles typically used in the distribution networks?

Narrow streets Signup and view all the answers

What is the purpose of the distribution feeder recloser?

Interrupting overload and fault current Signup and view all the answers

Which component of the electrical distribution system is responsible for redirecting or cutting off power flows for load balancing?

Circuit-breaker switches Signup and view all the answers

What do protective equipment in the distribution system include?

Lightning arresters and fuses Signup and view all the answers

What is the purpose of primary circuits in the electrical distribution system?

Carrying power from substations to local load areas Signup and view all the answers

What do distribution transformers do in the electrical distribution system?

Reduce voltage for customers Signup and view all the answers

Where are services in the electrical distribution system typically found?

Extending from substations to load areas Signup and view all the answers