protection vaa - system controls & switchgearssystemcontrols.co.in/datasheet/alstom auxilliary...
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GRID
PROTECTION
Type VAAAuxiliary Relays
Features
• Simpleandrobustconstruction• Positive action and high mechanical
stability• Heavy duty contact available, where
required• Sluggedrelayswithdelayonoperation
/resetavailableinac/dcversion.
Application
Control, alarm, indication and otherauxiliarydutiesinacordcsystems.
The type VAA Plug-in-relays is speciallydesigned for industrial control dutiesrequiring respetitive switchingoperations.Itiscapableofprovidingover5 million operations without servicing
Customer Benefits• Auxiliaryrelay• Simple and robust
construction• More number of contact
configurations availablewithself/handresetfacility
• Operation annunciation intheformofflag
• Completely dust proof byIP5Xclassprotection
Auxilliary RelaysVAA
andwillwithstandanoperationofupto600perhour.
General description
VAA relays are voltage operated relays.Therelaysareattractedarmatureunitsofcompactdesignwithpositiveactionandahighdegreeofmechanicalstability.Therelayscanbesuppliedwithself,orhandresetcontactsandchangeovercontacts.Seetable1
Standard contacts are of silver/copperalloy. They are shaped and positionedto ensure a reliable and low resistancenormallyopenornormallyclosedcontact.Standard VAA 11/21 relays are suitableforac/dcsupplyandstandardVAA13/23relaysaresuitablefordcsupplyonly.
VAA21/22/23aredoublepoleversionsofVAA11/12/13respectively.
VAA31/33areTriplepoleversionsofVAA11/12/13respectively.
When it is necessary to break heavy orhighly inductive dc loads, heavy dutymagnetic blow out type contacts canbe provided. These contacts use themagnetic field of a small permanentmagnet to force thearconto thearcinghorns away from the contact tips. Thebreaking capacity of the heavy dutycontactisshownbythecurvesinFigure1.Auxiliary relays with delay on pick-up
or drop-off can be supplied on specificrequest. Similarly relays with magneticblowoutcontactscanalsobesuppliedonspecificrequest.
ThestandardVAArelaysprovideonlyin-stantaneousselforhandresetcontacts.
Toensurealongeroperatinglife,thetipsofthesilvercontactshaveadomedpro-file,theoptimumdesignfortherepetitiveoperation duties of industrial applica-tions.
Although the standard designs are suit-able for dc and full-wave rectified acsystemsonly, alternative versions for acoperationareavailable.
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AREVA T&D
Pallavaram Works19/1, G.S.T. Road,Pallavaram, Chennai - 600 043Tel: 91-44-2264 8000
Fax: 91-44-2264 0040
AREVA T&D Worldwide Contact Centre:http://www.areva-td.com/contactcentre/Tel.: +44 (0) 1785 250 070
www.areva-td.com
Our policy is one of continuous development. Accordingly the design of our products may change at any time. Whilst every effort is made to produce up to date literature. This brochure should only be regarded as a guide and is intended for information purposes only. Its contents do not constitute an offer for sale or advise on the application of any product referred to in it. We cannot be held responsible for any reliance on any decisions taken on its contents without specific advice.
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Figure 1 :Curve showing breaking capacity of magnetic blowout contacts
VAA
Technical dataCoil ratingDCVAAoperatessatisfactorilybetween75%-120%ofratedvolts.ACVAAoperatessatisfactorilybetween80%-115%ofratedvolts.
Minimum operating voltageNotgreaterthan70%voltagerating.
Operating timesVAA15-20mstypicalminimumatnominalvoltage
BurdensVAA113wattsfor30,125V6wattsfor50,250VVAA‘Plug’in:Nominal3watts
Contacts case & operation indicatorsRelay type Standard contacts Contact reset Case size Operation indicatorVAA11 6N/O,2N/O+2C/O,3N/O+3N/C,
2N/O+4N/CSelfreset ¼N(15T) Eithernoflagoramechanicallyoperated
handresetflagprovided
VAA12 4N/O,3N/O+1N/C,2N/O+2N/C Selfandhandreset ¼N(10T) Mechanicallyoperatedhandreset
VAA13 4N/O,3N/O+1N/C,2N/O+2C/O Handreset ¼N(15T) Mechanicallyoperatedhandreset.
Contact ratingsType of Contact Current Make and carry continu-
ouslyMake and carry for 3
secondsBreak
Standard AC 1250VAwithmaximaof5Aand660V
7500VAwithmaximaof30Aand660V
1250VAwithmaximaof5Aand660V
Standard DC 1250withmaximaof5Aand660V
7500Wwithmaximaof30Aand660V
100W(resistive)or50W(inductive)withmaximaof5Aand660V
VAA in magnetic blow-outContact ratings
Make and carry continuously
Make and carry for 3 seconds
Break
1875Wwithmaximaof7.5Aand660V
7500Wwithmaximaof30Aand660V
Detailsonapplication.Pleasestatedutyetc.
Maximum rate of operations: 600 per hour
Insulation
TherelaymeetstherequirementsofIS32311965/EC255-5seriesC-2kVfor1minute.
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Figure 2 : Case and panel cut-out dimensions for case 1/4 N ( all dimensions in mm)
VAA
Relay Type: VAA11
Case:
1/4N 15Terminals YF
Auxiliary Voltage:
24-30Vdc / 48-54Vdc 025
110-125Vdc / 220-250 Vdc 075
110-125Vac / 220-250 Vac 575
Contact Combination:
6 N/O 0
2 N/O + 2 C/O 2
3 N/O + 3 N/C 3
2 N/O + 4 N/C 4
Flag Option:
Without flag A
With flag B
Issue:
Factory Defined A
Relay Type: VAA11
Case:
1/4N 15Terminals YF
Auxiliary Voltage:
110-125Vdc / 220-250 Vdc 875
110-125Vac / 220-250 Vac 775
Contact Combination:
2 N/O + 2 C/O 2
Flag Option:
Reverse flag C
Issue:
Factory Defined A
VAA 11 Without Time delay on Drop off
VAA 11 With Time delay on Drop-off - 100ms±20ms
Relay Type: VAA11
Case:
1/4N 15Terminals YF
Auxiliary Voltage:
24-30Vdc / 48-54Vdc 025
110-125Vdc / 220-250 Vdc 075
110-125Vac / 220-250 Vac 575
Contact Combination:
6 N/O 0
2 N/O + 2 C/O 2
3 N/O + 3 N/C 3
2 N/O + 4 N/C 4
Flag Option:
Without flag A
With flag B
Issue:
Factory Defined A
Relay Type: VAA11
Case:
1/4N 15Terminals YF
Auxiliary Voltage:
110-125Vdc / 220-250 Vdc 875
110-125Vac / 220-250 Vac 775
Contact Combination:
2 N/O + 2 C/O 2
Flag Option:
Reverse flag C
Issue:
Factory Defined A
VAA 11 Without Time delay on Drop off
VAA 11 With Time delay on Drop-off - 100ms±20ms
Information required with your order
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GRID
VAA
ALSTOM T&D INDIA LIMITEDPallavaramWorks19/1,G.S.T.Road,Pallavaram,Chennai-600043Tel:91-44-22648000Fax:91-44-22640040
ALSTOM T&D Worldwide Contact Centre:http://www.alstom.com/contactcentre/Tel.:+44(0)1785250070
www.grid.alstom.com
“Alstom
logoandanyalternativeversionthereofaretradem
arksandservicemarksofA
lstom
.Theothernam
esmentioned,registeredorn
ot,areth
epropertyoftheirrespective
companies.Thetechnicalandotherdatacontainedinthedocumentareprovidedforinformationonly.NeitherALSTOM,itsofficersnoremployeesa
cceptresponsibilityfororshould
betakenasmakinganyrepresentationorwarranty(whetherexpressorimplied)astotheaccuracyorcom
pletenesso
fsuchdataortheachievementsofanyprojectedperform
ance
criteriawhereth
eseareindicated.Noliabilityisacceptedfora
nyrelianceplacedupontheinform
ationcontainedinth
isbrochure.A
lstom
reservesth
erightto
reviseorchange
thesedataatanytimewithoutfurthernotice.”
Relay Type: VAA12
Case:
1/4N 10Terminals YF
Auxiliary Voltage:
24-30Vdc 025
48-50Vdc 050
110-125Vdc 075
220-250Vdc 010
Contact Combination:
2N/O self reset 2N/O Hand reset 0
2 N/O self reset 1 N/O 1N/C hand reset 1
1 N/O 1 N/C self reset 1 N/O 1N/C hand reset 2
Flag Option:
With flag B
Issue:
Factory Defined A
Relay Type: VAA13
Case:
1/4N 15Terminals YF
Auxiliary Voltage:
24-30Vdc/48-50Vdc 025
110-125Vdc/220-250Vdc 075
110-125Vac/220-250ac 575
Contact Combination:
4 N/O 0
3 N/O 1N/C 1
2 N/O 2 C/O 2
Flag Option:
With flag B
Issue:
Factory Defined A