medium voltage air insulated switchboard for secondary ... · iec 62271-1 high-voltage switchgear...

© Gruppo ABB12 giugno 2013 | Diapositiva 1

UniSecMedium Voltage Air Insulated Switchboardfor Secondary distribution

Reham El-Deeb, June 2013

UniSecIndex

© ABB Group15th February Slide 2

• Product characteristics

• Typical Units Overview

• Electrical characteristics

• The latest IEC Standards

• IEC 62271-200 for Switchgear

• Level of service Continuity

• Partition Class

• Internal Arc Classifications

• UniSec Main Components

• UniSec Concepts and Advantages


UniSecProduct characteristics-1/2

§ Air Insulated of all live parts

§ Up to 24 KV ,1250 A, 25 KA

§ Includes 13 configurators according to the latest IECstandards

§ Switch Disconnector type GSec (SF6)

§ Fixed (removable) CB type HD4/R SEC (SF6)

§ Fixed (removable) CB type VD4/R SEC (Vacuum)

§ Withdrawable CB type Vmax/Sec 12-17.5kV(Vacuum)

§ Withdrawable CB type VD4/US 24kV (Vacuum)

§ Withdrawable Contactor type VSC/P 7.2-12kV(Vacuum)

§ Removable CB mounted on truck with wheels andconnector for auxiliary circuits

UniSecProduct characteristics-2/2


§ Circuit-Breaker panel with DIN CTs and VTs

§ Possibility to customize LV compartment withProtection and Multifunctional relays, pushbuttonfor electrical opening and closing, signallinglamps, auxiliary components (MCBs, etc.)

§ Internal Protection Degree:

§ IP3X for external enclosure and mechanicaloperating mechanism

§ IP2X between compartments

§ Wide possibilities for internal wiring using top andlateral auxiliary cable duct

§ Optimized solution for fast installation, easymaintenance and extensions

UniSecTypical Units Overview

© ABB Group3th May Slide 5

SDC = Incoming/Outgoing SDS = Coupler

SFC = Outgoing SFS = Coupler SFV = Measure

SDM = coupler with measure

UMP = Universal Metering

UniSecTypical Units Overview


DRC = Direct feeder DRS = Busbars riserWBC = withdrawable Incoming/Outgoing WBS = withdrawable Coupler

SBC = Incoming/Outgoing SBS = Coupler SBR = reversed feeder RRL – RLC Cables riser

UniSecElectrical characteristics

Rated Voltage kV 12 17.5 24

Test voltage (50-60 Hz x 1 min) kV 28 38 50

Impulse withstand voltage kV 75 95 125

Rated frequency Hz 50-60 50-60 50-60

Rated main busbars current A 630/800/1250 630/800/1250 630/1250

Rated normal current of apparatus

- VD4-HD4 removable circuit-breaker A 630/800 630/800 630

- GSec gas switch-disconnector A 630/800 630/800 630

- Vmax withdrawable A 630/1250 630/1250

- VD4 withdrawable A 630/1250

- VSC withdrawable A 400

Rated short time withstand current kA (3s) 16/21/25(*)(**) 16/21(**) 16/21(**)

Peak current kA 40/52.5/63 40/52.5/63 40/52.5/63

Internal arc withstand current (IAC AFLR) kA (1s) 12,5/16/21(***) 12,5/16/21 (***) 12,5/16/21

(*) 25 kA 2 s(**) 25 kA 3 s for withdrawable CB panel(***)25kA 1s for 12-17,5kV withdrawable CB panel



UniSecIEC Standards

SwitchboardIEC 62271-200 MV AC metal-enclosed switchgearIEC 62271-105 Alternating current switch-fuse combinationsIEC 62271-1 High-voltage switchgear common specificationsIEEE 693 Seismic TestIEC 60529 Degrees of protection provided by enclosures

Main ComponentsIEC 62271-102 MV AC current disconnectors and earthing switchesIEC 62271-100 MV AC circuit-breakersIEC 60470 MV AC contactors, contactor-based controllers and

motor-startersIEC 60044-1 Current transformersIEC 60044-2 Combined transformersIEC 60044-7 Electronic voltage transformersIEC 60044-8 Electronic current transformersIEC 60255-6 Measuring and Protection Electrical relaysIEC 60099-4 MV AC Surge arrestersIEC 60282-1 MV AC FusesIEC 60376 Specification of technical grade sulphur hexafluoride

(SF6) for use in electrical equipment

UniSecIEC Standard 62271-200


• Based on the new IEC Standard 62271-200switchgear should be classified according to:

1-Compartment accessibility & interlocks.

2- Loss of service continuity:.

LSC2A & LSC2B Service Continuityclassification

3- Partition class:.

PM & PI Partitioning class

4- Internal Arc ( IAC):.

Internal Arc IAC>> AFLR

• 21kA 1sec @24kV

• 25kA 1sec @12-17,5kV forwithdrawable CB units

UniSec- IEC Standard 62271-200LSC and Partition Class for Switch disconnector units

• Loss of Service Continuity: is a category to definethe possibility to keep other compartments and\orfunctional units energized when opening the maincircuit compartment

• LSC2A for Switch disconnector or fixed Circuit-Breakers units

• 2 main MV compartments (segregated byGSec):

1. Busbars

2. Circuit-Breakers and Cables

Accessibility to CB & Cables compartment with servicecontinuity of Busbars compartment and adjacentpanels.

§ Partition Class: PM Metallic Partition betweencompartments


1

2

UniSec- IEC Standard 62271-200LSC and Partition Class for Withdrawable CB units

§ LSC2B for withdrawable Circuit-Breakers units

• 3 main MV compartments (segregated byshutters):

1. Busbars

2. Cables

3. Circuit-Breakers

accessibility to CB compartment with servicecontinuity of Busbars and Cables compartments andadjacent panels.

§ Partition Class:§ PM Metallic Partition between compartments

@ 12-17.5kV

§ PI Insulated Partition between compartments

@ 24kV


3

1

2

Against the wall Middle of the room Against the wall or Middle of the room

IAC AFLR up to 21 kA 1s with arc ducts and pressure relief outside the room [3]

up to 25kA 1s for withdrawable CB panel 12-17.5kV

IAC AFLR up to 16 kA 1s with arc gas absorbers and pressure relief inside the room [1] , [2];

up to 25kA 1s for withdrawable CB panel 12-17.5kV

UniSec- IEC Standard 62271-200Internal Arc Classifications



UniSecMain Components

GSecSwitch Disconnector


§ Three-position: Line – Open – Earth

§Housing made of two materials:

§ top part in epoxy resin

§ bottom part in stainless steel

§Can be used in combination with fuses

§ Front access to the actuator

§Easy installation and replacement ofaccessories

§Separate operating seats for isolation andearthing operations

© ABB Group12 giugno 2013 | Slide 15

GSecMain Features

§PM bottom part in stainless steel increasing personnel safety

§Rated current up to 800A @ 12-17,5kV or up to 630A @ 24kV

§Switch Disconnector with motor for remote use

§High electric and mechanical life performance:

§ line: M2 up to 5000 operations for single spring

E3 up to 5 makings

§ Earth: M0 up to 1000 operations

E2 up to 5 makings

§ Min. Temperature of -25°C for single spring

§ Altitude of 3000 m

§ 3 padlocks

§Keys interlocking, type: Standard, Ronis e Profalux

§ Single Spring Actuator - Type 1 (SS)Closing and Opening operations with Single Spring Actuator,

Manually (lever) and Motor (remote) operated

§ Double Spring Actuator - Type 2 (DS)Closing and Opening operations with Double Spring Actuator,Spring charging Manual (lever) and Motorized (remote):Closing by pushbuttons or coilsOpening by pushbuttons, coils or fuses


GSecSingle or Double spring actuator

Typical UnitsActuator

Type 1 (SS) Type 2 (DS)SDC, SDS X XSFC,SFS -- XSDM X --SBC, SBS X --SBR X --DRC, DRS -- --SFV -- X


GSecSwitch Disconnector

§Mechanical indication directly from the mainshaft of the Switch Disconnector

§Spring charging contact for remote control

§Electronic card for motor, opening and closingrelease:

§ 24 Vdc - 48…60Vdc/ac for single springmechanism

§ 48..60Vdc/ac for double spring mechanism

§ 110 .. 250 Vdc/ac

§ Diagnostic

key lockspadlocks inclosed/openposition


Auxiliary contacts(4 line + 4 earth)

Opening coil Closing coil Undervoltage coil Motor device

Voltage presenceindication

Fuse blownsignalling contact

Digital manometerselfpowered withcontact for remoteindication

Analogic manometerwith contact forremote indication

GSecAccessories

UniSecRemovable Circuit-Breakers


VD4/R-Sec

HD4/R-Sec

UniSecWithdrawable Apparatus


Vmax@ 12-17,5kV

VD4/Sec@ 24kV

Contactor

VSC7/P

VSC12/P

UniSecProtection Relays


REF 601 REF 610 REF 615

REF 630REF 542plus

UniSecInstrument Transformers


TRADITIONAL DIN CTs Ring CTs DIN VTs

SENSORS DIN Current Ring Current KECA CombinedCurrent and Voltage

© ABBMonth DD, YYYY | Slide 23

UniSecSurge Arresters

Solution available for:

§ SBC

§ SDC (375,500,750mm)

§ DRC (375, 500mm)

§ SDM

§ WBC

Surge arrestor ABBMWD type in accordingto IEC 60099-4


UniSecConcepts & Advantages


360° Solutions

• A wide range of functional units easy toupgrade

• Modular solution for Switch Disconnectoraccessories

• Standard Removable Circuit-breaker (<2h for replacing)

• Optimized solution for panel coupling andassembling

UniSecConcepts and advantages


Advanced technical solutions

• Surge arresters for 375mm widepanels

• Both DIN CTs and VTs inRemovable CB panel

• Up to n°2 cables each phase…400mm2

• Switch Disconnector Double Springoperating mechanism with:

• Opening coil

• Closing coil

• Under voltage coil



Advanced technical solutions

• Withdrawable CB panel600/750mm wide @ 12-17,5/24kV

• Unit with withdrawable Contactor

• Installation altitude up to 3000m

• Manual or Digital manometer forSwitch Disconnector

• Voltage presence indication type:

• VPIS (IEC EN 61958)

• VDS (IEC EN 61243-5)


medium voltage air insulated switchboard for secondary ... · iec 62271-1 high-voltage switchgear...

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