Post on 10-Oct-2015
description
hLV&MVSwitchgears#6
By:AhmadMokhtari
Mobile:09125137028Email:indelectrainer@gmail.com
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
Types of Outgoing FeedersTypesofOutgoingFeeders
MotorStarter:LV&MV
CircuitBreaker:LV&MV
Motor StarterMotorStarter
ON/OFFON/OFF
Protection
Indicators
Motor StarterMotorStarter
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
Motor StarterMotorStarter
ON/OFFON/OFF
High Currents
Protection
HighCurrents
LowCurrents
Indicators
MotorStarter:Protection(HC)( )
MotorStarter:Protection(LC)( )
Motor StarterMotorStarter
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/
Motor Starter: LVMotorStarter:LV
1 P S l f C l Ci i1. PowerSupplyofControlCircuit
2. ClosingCircuit
3. OpeningCircuit
4. IndicationLamp
MotorStarter400V,3Ph
MotorCircuit230V
Stop
Start
ContactorsBobbin
N
Substation
CentralControlRoom
Substation
PermitPermit
ONON
MotorCircuit230V
Stop
Start
ContactorsBobbin
N
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
Motor Starter: LVMotorStarter:LV
1 P S l f C l Ci i1. PowerSupplyofControlCircuit
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
Motor Starter: LVMotorStarter:LV
1 P S l f C l Ci i1. PowerSupplyofControlCircuit
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
Motor StarterMotorStarter
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