switchgear presentation
TRANSCRIPT
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Switchgear
M. Nageswar Rao, Sr.Mgr.(EMD)
Date: 03.10.2015
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Presentation LayoutMotor applications Induction Motors
Starting methodsSpeed control methods
Synchronous MotorsStarting methodsSpeed control methods
DC MotorsStarting methodsSpeed control methods
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SwitchgearSwitch
Electrical device used to open/close current path in an electrical ckt.
SwitchgearCombination of switching devices with
associated eqpt. of Control Measuring Protection
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SwitchgearFunctions
Carrying normal load currentMaking/ breaking normal load currentClearing the fault current
Parts of swgr.Switching devicesPower ckt.Control ckt.
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Switchgear devicesProtection devices
Circuit breakersMCCBRelaysFuse
Isolating devicesIsolator/ Earth switch, MCB, SFU
MeasuringCT, PTAmmeter, Voltmeter, Energy meter
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Switchgear classificationBy voltage class
LV, MV, HV, EHVOutdoor
VCB, ABCB, SF6Indoor
Vaccuum contactor, ACBMetal enclosure, Metal clad
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Metal clad vs Metal enclosureMetal Enclosed swgr. Metal Clad swgr:switchgear is assembled
inside standard metal enclosures.
Different chambers are made like breaker chamber, bus bar chamber, LT Chamber, Cable chamber etc
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CB & Relay
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Circuit Breaker
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MCCB
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RelayNumerical Relay,Overload Relay,Coupling Relay
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Isolating devicesIsolator, SFU, MCB
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Thank you all