Panasonic is part of a large worldwide groupselling relays and associated switching products under different brand names in different territories.The conditions of use in some territories may differ from those customary in Europe. In particular there are often major differences in regard to national and international specifications, such as UL, CSA, VDE, SEV, EVE, SEMKO, etc. Thus, when considering contact loads as stated in this catalogue (e.g. 10 A, 30 VDC for the SP relay) its hould be understood that these values are not necessarily an absolute maximum but tested ratings. Mostly the stated value has been tested for a certain life expectancy as stated by the manufacturer or the respective test house. Thus, under different conditions, the stated “maximum” may, in practice, be safely exceeded.
3contact iswelded)
Becausetheweldedcontactspringisattachedtothe
card,thearmaturehasbecomeinoperative.5mm.5mm.
Inindependentchambers,thecontacts“a”and“b”arekeptapart byabody/
caseseparatororbythecarditself. 3FormA1FormBcontact Structurewithindependent COMcontact of(3FormA1FormB), contacts.
2.5mm.1 10376
99. Separatechambermethod
(3FormA1FormBtypes)
Preventsshortingandfusingofspringsandspring
failureowingtoshort-circuit current.
Subsequentcontact movementissuspendedandthe
weldcanbedetected
Thetwocontacts“a”and“b”arecoupledwiththesamecard. Contact rating
E43149 6A250VAC LR26550etc.01
6A250VAC
SAFETY STRUCTURE RELAYS
T t
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w g
a s
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a l
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SAFETY STANDARDS
UL/C-UL(Recognized) CSA(Certified) TÜV(Certified) SEV
FileNo.020inch.
Eachofthethreeform“a”contacts(No. 1,2,and4)
maintainagapofgreaterthan0.Theoperation
ofeachcontact isregulatedbythemovementoftheothercontact.
576
Energized (whenno.
If the No.
3.
Asshownonthediagramontheleft, evenifthe
operatingspringsnumbered 1and2thereisno
shortingbetween“a”and“b”contacts.1 10197.020inch. Forcedoperationmethod
(3FormA1FormBtypes)
Evenwhenonecontact isweldedclosed,theother
maintainsagapofgreaterthan0. 6A250VAC R9919003(SF3) 6A250VAC 97.
Inthediagramontheleft,thelowercontact “b”have
weldedbuttheuppercontact “a”maintainatagapof
greaterthan0. Rating FileNo. Contact rating FileNo. Thismakesitpossibletodesign
variouskindsofcontrol circuitsandsafetycircuits.020inch.
Independent COMenablesdifferingpolecircuit
configurations. contact welds.
Structure Operation
1.
F d
I a
m .
ds 61405 sf3: 180413D
. Contact rating FileNo
