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.
If the power source for the relay
operating circuit connected the same
line motors, solenoids, transformers,
and other loads, when these loads
operate, the line voltage drops, and
because this the relay contacts suffer
the effect vibration and subsequent
burn damage.
n n
ds_x61_en_relay_technical_information_091112D8
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It desirable have less than 5%
ripple for the reed type relay. However, is
necessary that the waveform the
voltage impressed the coil sine
wave.
W ith the actual circuit used, is
absolutely necessary confirm the
characteristics. particular, small type
transform used and its capacity has
no margin safety, when there long
wiring, the case household used
or small sales shop use where the wiring
is slender, necessary take
precautions because the normal
voltage fluctuations combined with these
other factors.
Electrical life will affected the
drop voltage the coil when load is
turned on.General Application Guidelines
2 t
• lta il
In order have stable operation the
relay, the energizing voltage should be
basically within the range +10% /-15%
of the rated voltage. By
means shading coil for the coil,
humming stopped, but with distorted
waveform, that function not displayed. Please check specifications with
the original manufacture.
• t
W recommend that the voltage applied
to both ends the coil type relays
be within +5% the rated coil voltage.
Figure shows example waveform
distortion.
As power source for the type relay,
a battery either half wave full wave
rectifier circuit with smoothing capacitor
is used.
Please verify that the actual voltage is
applied the coil the actual load.
For the hinge type relay, half wave
rectifier cannot used, alone unless
you use smoothing capacitor. hen trouble develops, a
survey the voltage situation should be
made using synchroscope similar
means, and the necessary counter
measures should taken, and together
with this determine hether special
relay with suitable excitation
characteristics should used, make a
change the circuit shown in
Figure which capacitor inserted
to absorb the voltage fluctuations. There problem the power
source com ercially provided power,
but when stabilized power source is
used, there waveform distortion due
to that equipment, and there the
possibility abnormal overheating. Also ordinarily the
following must given thought.
In the case ripple included the DC
power source, particularly the case of
half wave rectifier circuit with smoothing
capacitor, the capacity the capacitor
is too small, due the influence the
ripple, humming develops and an
unsatisfactory condition produced.)
for both the coil and contact. The
ripple and the characteristics must be
evaluated for proper usage.
For the hinge type relay, there are
certain applications that may may
not use the full wave rectifier it's
own. The characteristics with regard to
the pick-up voltage the relay will
change depending upon the type of
power source, and because this, in
order display stable characteristics, the
most desirable method perfect DC.
It necessary give consideration to
the use power source with less
than ripple.
In particular, when magnetic switch is
being used, because the load becomes
like that motor, depending upon the
application, separation the operating
circuit and power circuit should tried
and investigated.
Coil applied voltage and the drop in
voltage
Shown following circuit driven by
the same power supply (battery, etc
