Online LVMV 6

hLV&MVSwitchgears#6

By:AhmadMokhtari

Mobile:09125137028Email:[email protected]

5th May7th July,2014y y

LV Bus couplerLVBuscoupler

Bus couplerBuscoupler

1. Current&VoltageSamplesg p2. ClosingCircuit3. TripCircuitp4. TCS5. InterlockwithIncomings6. IndicationLamp7. Heater&Lighting

Normal OperationNormalOperation

2/3IncomingA IncomingB

Bus CouplerBusCoupler

Modes of Bus TransferModesofBusTransfer

1. ManualBusTransfer

2 Automatic Transfer Switch2. AutomaticTransferSwitch

1 Manual Bus Transfer1 ManualBusTransfer

i:WithVoltageInterruption(Sl T f )(SlowTransfer)

ii: WithoutVoltageInterruption(F T f )(FastTransfer)

ManualBusTransferWithVoltageInterruptiong p

1 IncomingA IncomingB 1

B C lBusCoupler

2

ManualBusTransferWithoutVoltageInterruption

IncomingA IncomingB 22

B C l0.4kV 0.4kV

BusCoupler

1

InitialConditions

3

251 2

Close4

25

Close

InServiceTCS

ServiceNo27i

4ServiceNo27i

IncomerA IncomerB

50,51 5

ManualBusTransferWith/without Voltage InterruptionWith/withoutVoltageInterruption

Faultlevelrising Not Faultlevelrising

Notusedinthe Startingcurrent Not used in thenormalcourse(Incaseofan

inrush,heavyvoltagedrop(Prel d l d ) emergency)selectedloads)

Modes of Bus TransferModesofBusTransfer

1. ManualBusTransfer

2 Automatic Transfer Switch2. AutomaticTransferSwitch

2 Automatic Transfer Switch2 AutomaticTransferSwitch

The reduction of the voltage below a preselectedThereductionofthevoltagebelowapre selectedvalueandafterapreselectedtimeperiodtheaffectedincomingbreakerwilltrip.

Afterthebreakerhasdisconnectedthemainthebustiebreakerwillclose.

Thisoperationwillnottakeplaceiftheincomerwastrippedbyanyfutureprotectiondevice.

2 AutomaticTransferSwitch

AA B

TransferScheme

Local

Open ATS1

Remote

Cl0.4kV 0.4kV

Close

2

TransferScheme

1Local

1

OpenATS

Remote

Cl0.4kV 0.4kV

Close

2

InitialConditionsLocal

LogicDiagram

IncomingBOpenorNoServiceRelaynotoperated Close

PB

&

PBIncomingA

Close&Service&Relaynotoperated ATS

& ClosingCoil

ServicePositionTCS

LocalSelector SwitchATS

27inotoperated

&

Relay

TCSRemote

Remote

BusbarA(27R) &

CloseCloseCommand

ReturntoNormalOperation(R T f )(ReTransfer)

ReturntoNormalOperation(R T f )(ReTransfer)

i:WithVoltageInterruption

(Sl f )(SlowTransfer)

ii: WithoutVoltageInterruption

(FastTransfer)

TransferScheme:Wi h V l I iWithVoltageInterruption

Close2

OOpen

1

TransferScheme:Wi h V l I iWithoutVoltageInterruption

25Close

1

25

OOpen

2

HighspeedBusbarTransfer(HBT)

Highspeed Busbar Transfer(HBT)High speedBusbarTransfer(HBT)

Bus couplerBuscoupler

1. Current&VoltageSamplesg p2. ClosingCircuit3. TripCircuitp4. TCS5. InterlockwithIncomings6. IndicationLamp7. Heater&Lighting

TripCondition

BothIncomers:1 Openp2 Closed

3 noinService.

IncomingA IncomingB

Bus CouplerBusCoupler

4

Outgoing FeedersOutgoingFeeders

Types of Outgoing FeedersTypesofOutgoingFeeders

MotorStarter:LV&MV

CircuitBreaker:LV&MV

Motor StarterMotorStarter

ON/OFFON/OFF

Protection

Indicators

Start CommandStartCommand

Stop CommandStopCommand

Motor Starter : ON/OFFMotorStarter:ON/OFF

Ci it B k CircuitBreaker

Contactor

Contactor

ContactorContactor

ElectricalLatch

Mechanical LatchMechanicalLatch

Motor Starter : ON/OFFMotorStarter:ON/OFF

Ci it B k MV CircuitBreaker:MV

Contactor:LV,MV


ON/OFFON/OFF

High Currents

Protection

HighCurrents

LowCurrents

Indicators

MotorStarter:Protection(HC)( )

MotorStarter:Protection(LC)( )


ON/OFFON/OFF

Protection

Locally

Indicators

ToCentral ControlRoom

Signal LampsSignalLamps

TCSTestFaultOpenClose

Types of Outgoing FeedersTypesofOutgoingFeeders

MotorStarter:LV&MV

CircuitBreaker:LV&MV

400V,3Ph

Motor Starter: LVMotorStarter:LV

1 P S l f C l Ci i1. PowerSupplyofControlCircuit

2. ClosingCircuit

3. OpeningCircuit

4. IndicationLamp

Power Supply of Control CircuitPowerSupplyofControlCircuit

400/230/



2. ClosingCircuit

3. OpeningCircuit

4. IndicationLamp

MotorStarter400V,3Ph

MotorCircuit230V

Stop

Start

ContactorsBobbin

N

Substation

CentralControlRoom

Substation

PermitPermit

ONON

MotorCircuit230V

Stop

Start

ContactorsBobbin

N

Substation

CentralControlRoom

Substation

Permit ONPermit ON

ONON

MotorCircuit230V

Stop

RL R

Start Start

ContactorsBobbin

N

Substation

CentralControlRoom

Substation

ON/OFFCommand

InterlocksInterlocks

230V

Service1 24V,L()

Service

2K01

3

4

5On/OffCouplingRelay

K01

Relay

K1

N



2. ClosingCircuit

3. OpeningCircuit

4. IndicationLamp

Substation

CentralControlRoom

Substation

Off

Off

OffESD

CommandOff

Off

MotorCircuit230V

ESD

StopPanelEmgy.Stop

L RDCS

Start Start

ContactorsBobbin

N

Motor ProtectionMotorProtection

RelayRelay

TemperatureSensor

Earth Leakage EarthLeakage



2. ClosingCircuit

3. OpeningCircuit

4. IndicationLamp

230V

Service T1 24V,L()

EarthFault

Service Test

P.B

2K01

24V,L(+)

Fault

PTCTest 3

4

FaultSignal

Running

K2K1

ESD

Bimetal

5

Signal

On/OffCoupling

C B

K01 K2K1K1

CouplingRelay

1

K1K2

C.B 1

2

ESD

FaultOpenClosedN

SubstationCentralControlRoom

SubstationRunningSignal

F ltFaultSignal

ON/OFFESD

CommandCommand

InterlocksInterlocks

Overload Relays ABBOverloadRelaysABB

Thermal Overload RelaysThermalOverloadRelays

ElectronicOverloadRelays

400V,3Ph


Type 1Type1

Type2

Type 1 coordinationType1coordination

Type 1 coordination requires that in a shortType1coordinationrequiresthatinashortcircuitcondition,thecontactororstartermustnot present any danger to personnel ornotpresentanydangertopersonnelorinstallationsandmustnotbeabletoresumeoperation without repair or the replacementoperationwithoutrepairorthereplacementofparts.

Type 2 coordinationType2coordination

Type2coordinationrequiresthatInashortype coo d at o equ es t at a s o tcircuitcondition,thecontactororstartermustnotpresentanydangertopersonnelor

ll d b l b blinstallationsandmustsubsequentlybeabletoresumeoperation.Theriskofcontactweldingispermissible; in this case the manufacturer mustpermissible;inthiscase,themanufacturermustindicatemeasurestobetakenregardingmaintenanceoftheequipment.q p

Type2coordinationincreasesreliabilityofoperation.

MotorCircuit230V

Stop

Start

ContactorsBobbin

N

solutionssolutions

Use of contactors with higher coil sealingUseofcontactorswithhighercoilsealingpower

Use of DC operated contactors UseofDCoperatedcontactors Reductionofthecontrolsupplyvoltage(allowf l d )forvoltagedrop)

Layingthesupplycablenearthecommandcontacts

Parallelswitchingofaresistance.g

Online LVMV 6

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