Why 6,600 V instead of 440v? (HIGH VOLTAGE SYSTEM)

Summary

In this video, Lucky Jake explains why ships use high-voltage electrical systems, specifically 6600 volts, to improve efficiency and reduce costs. As ships grow larger and carry more cargo, power demands increase, making high-voltage systems essential. Jake compares the current required for a 12-megawatt power generation system at 440 volts and 6600 volts, showing how using higher voltage dramatically reduces the size of cables and circuit breakers. The video highlights the benefits of high-voltage systems, including cost savings and reduced power loss, while providing an accessible breakdown of the technical aspects for viewers.

Takeaways

• 😀 Ships are getting bigger to increase cargo capacity, which leads to more profit for the owners.
• 🚢 Larger vessels require larger machinery, increasing their power consumption.
• ⚡ To handle the high power needs, ship owners use high-voltage systems like 6600V MS440.
• 🔌 In marine electricity, anything above 1000 volts is considered high voltage.
• 🔋 Typical marine high-voltage systems operate at 3.3kV, 6.6kV, or 10kV.
• 💡 Using high voltage reduces the size of conductors and electrical components needed on board.
• 💰 High-voltage systems help ship owners save money by lowering costs associated with electrical components.
• 🔍 A ship generating 12 megawatts at 440V requires a current of 4920.59A, which needs large conductors and breakers.
• ⚡ Switching to 6600V reduces the required current to just 328A, making the system much more efficient.
• 📉 High voltage also reduces power loss over long distances, making the system more efficient overall.
• 🎥 The video encourages viewers to comment, like, share, and subscribe for more content on maritime topics.

Q & A

Why are ships becoming bigger these days?

Ships are getting bigger because larger vessels can carry more cargo, which leads to higher profits for the shipping companies.

What challenges do bigger ships pose to electrical systems?

As ships get bigger, their machinery also grows larger, which increases power consumption and requires more robust electrical systems to handle the added load.

What is the purpose of using high-voltage systems on ships?

High-voltage systems are used on ships to save money on electrical components and reduce the size of the cables and circuit breakers needed to handle large power loads.

At what voltage is a system considered 'high voltage' in marine electricity?

In marine electricity, any system above 1000 volts is considered high voltage, which differs from land-based systems that classify medium voltage as anything above 1000 volts.

What are some examples of typical high-voltage systems on ships?

Typical high-voltage systems on ships operate at 3.3 kV, 6.6 kV, or even 10 kV, depending on the power requirements of the vessel.

How does using 6600 volts compare to 440 volts in terms of electrical load?

Using 6600 volts results in much lower current – only 328 amps, compared to 4,920.59 amps with 440 volts, making it more efficient and cost-effective.

How do high-voltage systems help reduce costs for ship owners?

High-voltage systems reduce the need for large conductors, circuit breakers, and other components, which lowers the overall cost of the ship's electrical system.

What are the key factors that drive the need for higher voltage systems on ships?

The key factors include the increasing size of ships, the growing power demands of onboard machinery, and the need to lower operational costs.

Why is a power factor of 0.8 mentioned in the example with 12 megawatts of power?

A power factor of 0.8 is used to reflect the efficiency of the electrical system. A lower power factor indicates that a larger portion of the generated power is wasted, which impacts the total current needed.

What are the other benefits of using high-voltage systems beyond cost savings?

High-voltage systems also reduce power loss during transmission, improving overall efficiency and ensuring that more of the generated power reaches its intended use.