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.
5.
Nominal Power VA) Nominal
Voltage Nominal Current. Contact Forms
Denotes the contact mechanism and
number contacts the contact circuit. Pick-Up Voltage
As the voltage unoperated relay is
increased, the value below which all
contacts must function (transfer).O. Maximum Switching Voltage
The maximum open circuit voltage which
can safely switched the contacts.
5. Care should be
taken not exceed this value. For coils expressed
in watts; expressed volt amperes. Contact Resistance
This value the combined resistance of
the resistance when the contacts are
touching each other, the resistance the
terminals and contact spring.
8.). This value is
the product switching voltage x
switching current, and will lower than
the maximum voltage and maximum
current product.
AC and voltage maximums will differ
in most cases.
.C.
3.
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TechnicalInfo.
4.DEFINITION RELAY TERMINOLOGY
COIL (also referred primary input)
1.
6. Nominal Operating Power
The value power used the coil at
nominal voltage. The contact
resistance measured using the
voltage-drop method shown below. Nominal Coil Voltage (Rated Coil
Voltage)
A single value (or narrow range) of
source voltage intended design be
applied the coil input. Coil Designation
Single side stable type
2.
8. Drop-Out Voltage
As the voltage operated relay is
decreased, the value above which
all contacts must revert their
unoperated position.
Form contacts are also called
changeover contacts transfer contacts. and DC
current maximums may differ.
The measuring currents are designated.
2.
CONTACTS (secondary output)
1. Rated Switching Power
The design value watts (DC) volt
amperes (AC) which can safely be
switched the contacts. (Note that for certain
types relays, the resistance may
be for temperatures other than the
standard 20°C 68°F.)
6. Short duration spikes of
a higher voltage may tolerable, but
this should not assumed without first
checking with the manufacturer.
contacts break contacts.
In general, for relays with contact rating
of more, measure using the
voltage-drop method DC. Maximum Carrying Current
The maximum current which after closing
or prior opening, the contacts can
safely pass without being subject to
temperature rise excess their design
limit, the design limit other
temperature sensitive components the
relay (coil, springs, insulation, etc. Contact Symbols
Form contacts
(norm ally open contacts) ^
Form contacts
(norm ally closed contacts) 6
Form contacts
(changeover contacts)
£> ^
Form contacts are also called N. This
value usually excess the
maximum switching current. Maximum Applied Voltage
The maximum voltage that can be
applied continuously the coil without
causing damage. Nominal Operating Current
The value current flow the coil when
nominal voltage impressed the coil
4.
Form contacts are also called N. Coil Resistance
This the resistance the coil DC
type relays for the temperature conditions
listed the catalog. Maximum Switching Current
The maximum current which can safely
be switched the contacts.
contacts make contacts.
Measured contact
R
Power
source
); Ammeter Voltmeter (
(AC DC)
): Variable resister
Test Currents
Rated Contact urrent Test urrent
Switching urrent (A) (mA)
1 more 1,000
The resistance can measured with
reasonable accuracy YHP 4328A
milliohmmeter.
3.
7. Maximum Switching Power
The upper limit power which can be
switched the contacts.
7
