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
initial test (trial production), shows
favorable operation, but the num ber of
operations increases, contact blackening
(carbonization) plus the chattering the
relay creates instability performance. this case
the relay and tim may not revert.
8 tio tiv e
For long wire runs, when the line for the
control circuit and the line for electric
power use single conduit, induction
voltage, caused induction from the
power line, will applied the
operation coil regardless whether or
not the control signal off.
The circuit shown Figure causes a
timing and sequential operation using a
reed type relay, but this not good
example with mixture gradual increase
of impressed voltage for the coil and a
suicide circuit. Figure (a), with contacts A,
B, and closed, after relays R1, and
R3 operate, contacts and open,
there series circuit through R1, ,
and and the relays will hum and
sometimes not restored the drop
out condition.
In e
Therefore, when wiring spans long
distance please rem ber that along
with inductive interference, connection
failure may caused problem with
distribution capacity the device might
break down due the influence of
externally caused surges, such that
caused lightning. Therefore,
check the relay hile operating the
actual system.
The connections shown Figure (b)
are correctly made. addition, with
regard the circuit, because is
simple means diode prevent
stray circuits, proper application should
be made. hen driving relays with
timers, micro computers and thyristors,
etc. This method applying
voltage the coil should not used,
and consideration should given the
method impressing voltage the coil
(use switching circuit). the timing portion for
relay R1, when the timing times out,
chattering occurs causing trouble., there may synchronization with
the power supply phase. Also, the
case latching relays, using self Form
B” contacts, the method self coil circuit
for complete interruption used, but
because the possibility trouble
developing, care should taken.
10 ds_x61_en_relay_technical_information_091112D
.
Instability point
Rib _
Ria
Ria: Form contact relay R-
Rib: Form contact relay R-
Ri Reed type relay Capacitor
R2: Reed type relay Variable resistance
(for time adjustment)
Figure “Not good example": timing and sequential operation using reed type relay
Ri a
7 tio g
If switching the relay contacts is
synchronized with the phase the AC
power, reduced electrical life, welded
contacts, locking phenomenon
(incom plete release) due contact
material transfer may occur.General Application Guidelines
Figure shows example stray
circuits.
6 lta it
W hen the voltage impressed the coil
is increased slowly, the relay transferring
operation unstable, the contact
pressure drops, contact bounce
increases, and unstable condition of
contact occurs
