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.
Poznámky redaktora
the case DC, there no
zero current point such there with
AC, and accordingly, once cathode arc
has been generated, because difficult
to quench that arc, the extended tim of
the arc major cause. hen switching of
the contacts occurs for long periods,
organic membrane may form the
contact surfaces and lead contact
instability.
N The designation the drawing
indicates the insertion insulation
between the iron core and the chassis.
Insert the contacts (or switch) the
© side the power source. (Refer to
Figure (Common all relays)
C ils
Bobbin
k ©
+ -
L Relay coil t
r V
A Iron core
i (Insulation
Switch resistance)
Figure Judgement: Good
In the case where unavoidably the ©
side grounded, the case where
grounding not possible. Ordinarily, the
approxim ate control capacity is
mentioned catalogs sim ilar data
sheets, but this alone not sufficient.
1 ith itc g
Please carry out periodic contact
conductivity inspections when the
frequency switching once fewer
tim per month. Because the possibility of
open circuits occurring, attention should
be given the following points.
W ith special contact circuits, for the
individual case, the aker either
estimates from the past experience or
makes test each occasion. (Refer Figure 10)
(NF and with ground term inal)
is grounded, always avoid interting the
contacts (and switches) the side.
• The side the power source should
be connected the chassis.
Because contact transfer, welding,
abnormal wear, increase contact
1. addition, due
to the direction the current being fixed,
the phenomenon contact shift, as
noted separately below, occurs relation
resistance, and the various other
damages which bring about unsuitable
operation, the following items require full
investigation. tio t
• lta C
W hen there inductance included the
circuit, rather high counter is
generated contact circuit voltage,
and since, the extent the value of
that voltage, the energy applied the
contacts causes damage with
consequent ear the contacts, and
transfer the contacts, necessary to
exercise care with regard control
capacity. In
relays where ground term inal is
provided, the iron core can grounded
directly the chassis, but in
consideration electrolytic corrosion, it
is more expedient not make the
connection. you
must use single stable relay, use a
sealed type relay that not easily
affected bient conditions and
provide failsafe circuit design that
considers the possibility contact failure
or disconnection.
Continuous, long-term current the coil
will facilitate deterioration coil
insulation and characteristics due to
heating the coil itself.
For circuits such these, please use a
magnetic-hold type latching relay.
(Refer Figure 11) (Common all
relays)
Bobbin
e
Relay coil
—oT>—
Switch
Figure Judgement: good
• the case relays provided with a
ground terminal, when the ground
term inal not considered effective, not
making connection ground plays
an portant role method for
preventing electrolytic corrosion. (Refer to
Figure (Common all relays)
connect the ground term inal the ©
side the coil.General Application Guidelines
9 g
A circuit designed for non-excitation
when left running desirable for circuits
(circuits for ergency lamps, alarm
devices and error inspection that, for
example, revert only during malfunction
and output warnings with form B
contacts) that will carrying current
continuously for long periods without
relay switching operation.
*W recommend that you verify with one
of our sales offices
to the contact wear. Also, in
catalogs and sim ilar data sheets, the
control capacity that mentioned is
11ds_x61_en_relay_technical_information_091112D
.
+
[3] PRECAUTIONS REGARDING CONTACT
• t
The contacts are the most important
elements relay construction. Contact
performance conspicuously influenced by
contact material, and voltage and current
values applied the contacts (in
particular, the voltage and current
waveform the tim application and
release), the type load, frequency of
switching, bient atmosphere, form of
contact, contact switching speed, and of
bounce.
1 f
In the case com paratively high voltage
coil circuits, when such relays are used in
high tem perature and high humidity
atm ospheres with continuous passage
of current, the corrosion can said be
the result the occurrence electrolytic
corrosion
