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.
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ds 61407 sf4d: 180413D 583
Safety
. 0.
Ifthecontactschangestateowingtoloading/breakingitisnecessarytocheck
theactual loading.5 >0. contact welds.
3 >0. 1contact iswelded)
Example the No.5 >0.5 >0.5 >0.5mm.5 >0. and
8) returntoaclosedstate.SF4D
THE OPERATION RELAYS (when contacts are welded)
SF relays work maintain normal operating state even when the contact welding occur overloading short-circuit
currents.5 >0.5 >0.
''''-'-■^.5 >0.
Theadjacent No.5
4 >0.
Energized-
Non-energized-
Weld
- -
-0-—T5
Contactgap
min0.
Evenifoneofthecontactswelds,theothercontacts
operateindependentlyandthecontact gapsare
maintainedatgreaterthan0.5mm.5mm.Contact No.020inch
¡:contact closed
Emptycells:
eitherclosedoropen
For Cautions for Use, see Relay Technical Information (page 610).5 >0.5: contact gapiskept at
min.
Non-energized Energized(whenno.5 |
2 >0.Theothercontacts, because
thecoil isnotenergized, returntotheirnormal return
state; eachofform“a”contacts(No. 2contact iswelded)
Example: the No.5 >0.5 >0.5
8 >0.5mm
.5 >0.
Energized Non-energized(whenno.020inch.5mm.5 >0.1 No.8
Terminal No.020inch
C e
Contact No.5
Welded
terminal
No.5 >0. 2contact maintainsagapofgreater
than0.020inch.5 >0.3 No.5 |
6 >0.5 >0.2 No.4 No. easy make weld detection circuits and safety circuits the design ensure safety even contacts weld. contact welds.5
*Contact gapsareshownattheinitial state. and7)
maintainsacontact gapofgreaterthan0.5
7 >0.6 No.5 >0. 20-19 12-11 8-7 16-15 13-14 5-6 9-10 17-18
T h
t e
f .5 >0. Stateofothercontacts
Contact No..
Example 2:
If external connections are made series.
Eachofthefourform“a”contacts(No.7 No.5mm.5 >0.5 >0. 8
1 >0.5 >0.
E d
W d
a .020inch. No.5 >0. and7)
maintainsagapofgreaterthan0.5 >0.
4 Form Form type
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g .5 >0.5 No.020inch;eachoftheform“b”contacts(No.5
5 >0.5 >0
