RELAYS Panasonic

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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.

Vydal: Panasonic Electric Works Czech s.r.o. Autor: Panasonic

Strana 950 z 1090

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*W recommend that you verify with one of our sales offices to the contact wear. 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. 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. (Refer to Figure (Common all relays) connect the ground term inal the © side the coil. 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. 1 ith itc g Please carry out periodic contact conductivity inspections when the frequency switching once fewer tim per month. 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. Because contact transfer, welding, abnormal wear, increase contact 1. Continuous, long-term current the coil will facilitate deterioration coil insulation and characteristics due to heating the coil itself. (Refer Figure 10) (NF and with ground term inal) is grounded, always avoid interting the contacts (and switches) the side. Also, in catalogs and sim ilar data sheets, the control capacity that mentioned is 11ds_x61_en_relay_technical_information_091112D . hen switching of the contacts occurs for long periods, organic membrane may form the contact surfaces and lead contact instability. (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.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 ith special contact circuits, for the individual case, the aker either estimates from the past experience or makes test each occasion. + [3] PRECAUTIONS REGARDING CONTACT • t The contacts are the most important elements relay construction. 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. • The side the power source should be connected the chassis. Because the possibility of open circuits occurring, attention should be given the following points. (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. Ordinarily, the approxim ate control capacity is mentioned catalogs sim ilar data sheets, but this alone not sufficient. N The designation the drawing indicates the insertion insulation between the iron core and the chassis. 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. For circuits such these, please use a magnetic-hold type latching relay. Insert the contacts (or switch) the © side the power source. 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