11 to 33kV Medium Voltage Switch Gear Introduction Free Download
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11 to 33kV Medium Voltage Switch Gear Introduction, FreeTuts Download

11 to 33kV Medium Voltage Switch Gear Introduction   Free Tutorial Download

Prerequisites

  • Basics of Electrical

Description

You will learn about Electrical MV SWGR basics, I have explained from at basic level.

From 3 KV to 36 KV switchgear system is categorized as medium voltage switchgear or MV switchgear . These switchgears are of many types. They may metal enclosed indoor type switchgear, metal enclosed outdoor type switchgear, outdoor type switchgear without metal enclosure, etc. The interruption medium of this switchgear may be insulating oil, SF6 gas or vacuum. The main requirement of power network is to interrupt current during faulty condition irrespective of what type of CB is used in the MV switchgear system . Although it may be capable of functioning in other conditions also.
Medium voltage switchgear, should be capable of,

  1. Normal ON / OFF switching operation.
  2. Short circuit current interruption.
  3. Switching of capacitive currents.
  4. Switching of inductive currents.
  5. Some special application.

All the above-mentioned functions must be carried out with a high degree of safety and reliability.

Short Circuit Current Interruption

The main focus of circuit breaker design is to that all circuit breakers should be capable of interrupting short circuit current with a high degree of reliability and safety. The number of faulty tripping occurred during the total lifespan of a circuit breaker mainly depends upon the location of the system, the quality of the system and environment conditions. If the number of tripping is much high, the best choice is vacuum circuit breaker as it may not require any maintenance up to 100 faulty tripping with short circuit current up to 25 KA. Whereas, other circuit breakers require maintenance after 15 to 20 faulty tripping with same short circuit current of CB. The substations reunited in rural areas are generally of an outdoor type, and most of them are the unattended type. Hence for this type of applications maintenance free outdoor type,medium voltage switchgear is most suitable. Porcelain clad vacuum circuit breaker meets this demand against the conventional indoor kiosks.

Following Topics are covered

What is MV SWGR

Explain all parts of MV SWGR

Explain MV SWGR compartments

Introduction of MVSWGR SLD

In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream

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11 to 33kV Medium Voltage Switch Gear Introduction, FreeTuts Download

 

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