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Home Tech Gadget & Electronics

How Long Does a Medium Voltage Circuit Breaker Last?

Ustimenow by Ustimenow
September 10, 2023
in Gadget & Electronics, Tech
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How Long Does a Medium Voltage Circuit Breaker Last?
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Introduction

A medium voltage circuit breaker (MVCB) is a switchgear device that is used to protect electrical circuits from overloads and short circuits. It is typically used in medium voltage applications, which are defined as voltages between 1,000 and 35,000 volts. MVCBs are used in a wide variety of industries, including power generation, distribution, and industrial applications.

How a Medium Voltage Circuit Breaker Works

A MVCB works by using a set of contacts to interrupt the flow of current in a circuit. When the current in a circuit exceeds a predetermined level, the contacts in the MVCB open, which interrupts the flow of current. This prevents the circuit from overheating and causing damage.

There are two main types of MVCBs: air-blast and vacuum. Air-blast MVCBs use compressed air to blow the contacts apart, while vacuum MVCBs use a vacuum to create an arc-free environment. Vacuum MVCBs are typically more expensive than air-blast MVCBs, but they are also more reliable and have a longer lifespan.

Types of Medium Voltage Circuit Breakers

There are a number of different types of MVCBs available, each with its own advantages and disadvantages. Some of the most common types of MVCBs include:

  • Air-blast circuit breakers: These are the most common type of MVCB. They are relatively inexpensive and easy to maintain. However, they are not as reliable as vacuum circuit breakers and have a shorter lifespan.
  • Vacuum circuit breakers: These are more expensive than air-blast circuit breakers, but they are also more reliable and have a longer lifespan. They are also less likely to create arcing, which can cause damage to electrical equipment.
  • SF6 circuit breakers: These are the most advanced type of MVCB. They are very reliable and have a long lifespan. However, they are also the most expensive type of MVCB.

Applications of Medium Voltage Circuit Breakers

MVCBs are used in a wide variety of applications, including:

  • Power generation: MVCBs are used to protect power generators from overloads and short circuits.
  • Distribution: MVCBs are used to protect distribution lines from overloads and short circuits.
  • Industrial applications: MVCBs are used to protect industrial equipment from overloads and short circuits.
  • Railways: MVCBs are used to protect railway signaling systems from overloads and short circuits.
  • Marine applications: MVCBs are used to protect marine electrical systems from overloads and short circuits.

Medium Voltage Circuit Breaker Last

 

As a diligent facility manager, you understand the criticality of low, medium, and high-voltage circuit breakers in ensuring the reliability of your electrical system. Circuit breakers and fuses are the primary defense against unforeseen short circuits, minimizing the risks of electrical accidents and power loss when the system is designed correctly and maintained. However, it’s essential to delve into the reliability and lifespan of circuit breakers and establish an effective maintenance program.

Circuit Breaker Age and Life Expectancy

Data indicates that the failure rate of circuit breakers initially decreases in the early years as manufacturing defects are rectified, but then gradually rises as the breaker ages.

DTE’s findings suggest that older circuit breakers have a life expectancy of approximately 40 years, while more recent breakers are designed to last around 30 years, with enhanced maintenance and replacement features to ensure ease of use.

This post was written by Justin Tidd, Director at Becker/SMC. For nearly a half a century, Becker Mining has been at the forefront of safety, producing the best Vacuum Circuit Breakers in the industry. Becker/SMC is the industry’s leader in increasingly more sophisticated electrical control systems. Most of the major innovations, design features and specialized electrical components have been developed by Becker/SMC.

 

 

Originally posted 2023-06-22 16:02:45.

Tags: Medium Voltage Circuit
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