ECA 436-1977 Dry Reed Relays for Circuit Board Mounting.pdf

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1、L. -. - EIA 436 77 3234600 0068573 2 AN -:; e a- C.83111 - 1976 Approved November 1, 1976 American National Standards Institute E-IA STANDARD c O DRY REED RELAYS FOR CIRCUIT BOARD MOUNTING RS-436 OCTOBER 1977 Engheering DeparErrPenf ELCTRONIC INDUSTRIES ASSOCIATION EIA 43b 77 = 3234600 00b8574 4 = E

2、LA engineering standards are designed to #ewe th public ititewst throu eliminating mis- understandings between manufacturers and purcbaaexri, facilitafiag interchan ea Uty and improve- pro er product for his partic ui ar need. Existence of su i% standards shall not in any respect pre- clu $ e any me

3、mber ar non-member of EIA from trraufactwhig or selling products not confomin to such standards, nor shalll the existence of such standards preclude their voluntary use by those Oger than ELA members whether the standard 18 to be used elther dmnestidy or internationally. Recommended standards are ad

4、opted by EUI without regard to whether or not their adoption may involve patents on articles, materials, or promes. By such action, IZA does not assume any liability to any patent owner, nor doewit assume any obligation whatever to parties adopting the recommended standai. single pole, double throw

5、(SPDT). Contact, Make-Before-Break, Continuity Transfer: A contact combination in which the opening con- tact opens after the closing contact closes. Form D contact; single pole, double throw (SPDT). (h Contact, Normally Closed: A contact combination which is normally closed when the relay is in its

6、 unoperated state. Form B contact; single pole, single throw (SPST). Contact, Normally Open: A contact combination that is open when the relay is in its unoperated state. Form A contact; single pole, single throw (SPST). Dielectric Withstanding Voltage: The voltage which may be applied between insul

7、ated parts of a relay without damage, arcing, breakdown, or excessive leakage. Diflerential: The difference, expressed in voltage or current, between pickup and dropout values of a relay contact. Dropout (DO) Value, Measured: See Operating Characteristics. Dropout Value, Specified: See Operating Cha

8、racteristics. Dropout Time: See Operating Characteristics Dropout: Release; the return of a relay to its unoperated state on opening the energizing circuit. e See Operating Characteristics. Duty Cycle: A statement of energized and deenergized time in repetitious operation, for example, one second on

9、, two seconds off (often expressed as the energized percentage of total cycle time, e.g., 33.3%)# EIA 436 77 3234600 0068580 T m d RS-436 Page 4 Dwell: Form C contacts. The value of coil drive required to open the normally closed circuit sub- e tracted from the coil drive required to close the norma

10、lly open contacts. Flux FeZd: The magnetic lines of force produced by a coil and/or permanent magnet. Front Contact: Normally open contact in a Form C switch (transfer switch). See Contact, Break- Bef ore-Make. Gap, Contact: The distance between mating contacts when the contacts are open. Hold Value

11、: See Operating Characteristics. * Hysteresis: The amount the magnetization of a ferrous material lags the magnetizing force due to molecular reluctance. Latching Relay (Bistable): A bistable, polarized relay is a two-position relay that will remain in its last operated position keeping the operated

12、 contacts closed after the operating winding(s) is (are) de- energized. Nonpickup Value: See Operating Characteristics. Operate: See Pickup. Operating Characteristics: pickup, nonpickup, hold and dropout, voltage or current. Pickup and operate are equivalent terms as are dropout and release. dropout

13、 value, measured. As the current or voltage on an operated relay is decreased, the value at which all contacts restore to their unoperated positions. dropout value, specified. As the current or voltage on an operated relay is decreased, the value at or above which all relay contacts must restore to

14、their unoperated positions. hold value, specified. As the current or voltage on an operated relay is decreased, the value which must be reached before any contact change occurs. nonpickup value, specified. As the current or voltage on an unoperated relay in increased, the value which must be reached

15、 before any contact change occurs. nonoperate value. See nonpickup value. operate value. See pickup value. operate value, just. See pickup value, measured. operate value, must. See pickup value, specified. EIA 436 77 3234600 0068583 1i RS-436 Page 5 pickup value, measured. As the current or voltage

16、on an unoperated relay is increased, the value at which all contacts function. a pickup value, specified. As the current or voltage on an unoperated relay is increased, the value at or below which all contacts must function. pull-in (or pull-on) value. See pickup value. release value. See dropout va

17、lue. reset value, measured. The current or voltage value required to reset or open the contacts of a latching relay. reset value, specified. As coil current or voltage is increased, the value at or below which contacfs of a latching relay must,reset or open. set value, measured. The current or volta

18、ge value required to set or close the contacts of a latching relay. set value, specified. As coil current or voltage is increased, the value at or below which all contacts of a latching relay must set or close. 8 Pickup (or fill-in) Time: See Time, Operate. Pole, Double: A term applied to a contact

19、arrangement to denote that it includes two separate contact combinations, that is, two single-pole contact assemblies. Pole, Single: A term applied to a contact arrangement to denote that all contacts in the arrangement connect in one position or another to a common contact. Rating, Coil: A statemen

20、t of the conditions under which a coil will satisfactorily perform its intended function. Rating, Contact: The electrical load handling capability of relay contacts under specified conditions and for a prescribed number of operations. Rating, Short-Time: The value of current or voltage that the rela

21、y can stand without injury for specified short time intervals. (For ac circuits, the rms total value, including the dc component, should be used.) The rating recognizes the limitations imposed by both thermal and electromagnetic effects. Release Time:- See Time, Release. Resistance, Contact: The ele

22、ctrical resistance of closed contacts, as measured terminal to terminal, at their associated terminals. Resistance, Insulation: The electrical resistance measured between insulated members. O Resistance, Winding: The electrical resistance of a coil winding measured at the specified temperature. EIA

23、436 77 W 3234600 0068582 3 W RS-436 Page 6 Saturation: Magnetic saturation exists in a magnetic structure or member when an increase of mag- netization applied does not increase the magnetic flux through that material. Shield, Elec trostatic: A groundedwonducting member located between two or more m

24、utually insulated elements to minimize electrostatic coupling, ShiekE, Magnetic: A ferro-magnetic material used to suppress magnetic coupling. Soak Value, Magnetic: The voltage or current applied to a relay coil to ensure a predetermined mag- netic state (usually the nominal value). Standoffs, Mecha

25、nical: Mechanical protrusions on the mounting plane of a relay. May be molded into the coil body or may be a geometric part of the relay terminals. Temperature Range, Operating: The temperature range over which the relay will meet all specified operating parameters. Time, Actuation: The time interva

26、l from coil energization or de-energization to the functioning of a specified contact: same as time, contact actuation, subdivided as follows: 1. time, final actuation - the sum of the initial actuation time and the contact bounce intervals following such actuation. 2. time, initial actuation - the

27、time from coil energization or de-energization to the first closing of a previously open contact or the first opening of a previously closed contact. (See also time, operate: time, release.) Time, Bridging: The time interval in which all contacts of a continuity transfer combination are electrically

28、 connected during the transfer. Time, Contact Bounce: The time interval from initial actuation of a contact to the end of a bounce. Time, Contact Stagger: The time interval between the functioning of contacts on the same relay (for example, the time difference between the opening of two normally clo

29、sed contacts on pickup). Time, Operate: The time interval from coil energizatiori to the functioning of the last contact to function. Where not otherwise stated, the .functioning time of the contact in question is taken as its initial actuation time (that is, it does not include contact bounce time.

30、) Time, Release: The time interval from coil de-energization to the functioning of the last contact to function, Where not otherwise stated, the functioning time of the contact in question is taken as its initial actuation time, that is, not including contact bounce. Time, Reset: The time interval f

31、rom coil energization to the opening time of the last contact to function. Time, Set: The time interval from coil energization to the closing time of the last contact to function. J EIA 436 77 = 3234b00 ROb8583 5 RS-436 Page 7 Time, Transfer: The time interval between opening the closed contact and

32、closing the open contact of a break-before-make contact combination. 4. QUALITY ASSURANCE PROVISIONS 4.1 General: Dry reed relays procured in accordance with the document shall meet all inspection re- quirements of this section. 4.1.1 Test Equipment and Inspection Facilities: The supplier of reed re

33、lays to this document will have established a calibration system that will accurately and adequately indicate parameters being tested. MIL-C-45662 may be used as a guide line. 4.2 e Quality Conformance Inspection 4.2.1 Sampling Plan: Unless otherwise specified statistical sampling and inspection sha

34、ll be in accordance with MTL-STD-105 inspection level II. A.Q. L. levels are specified in Table I. Defects shall be considered collectively for the purpose of acceptance or rejection only on tests shown within the particular A.Q.L. block. Defects from sep- arate blocks shall not be combined to cause

35、 rejection. 4.2.2 Inspection and Preparation for Delivery: Inspection shall be performed to ensure that relays have been packaged to the best commercial standards, and there shall be no chance of lead damage or any other undue damage that would affect the form, fit or function of the relays. See sec

36、tion 26 for preparation details. 4.2.3 Visual and Mechanicaz Examination: Relays shall be examined to verify that the materials, external design and construction, physical dimensions, marking, and workmanship are in accordance with applicable specifications. See section 5 for examination details. 4.

37、2.4 Electrical Tests: Relays shall be tested to verify that they will meet the electrical requirement listed in Table I. These tests are considered the most essential to proper relay operation. They must be carefully performed in accordance with the procedure listed under the applicable section. Any

38、 additional tests must be specified in the purchasing document. 5. VISUAL AND MECHANICAL INSPECTION 5.1 General: Relays shall be examined to verify that materials, internal and external design and con- struction, physical dimensions, marking and workmanship are in accordance with applicable requirem

39、ents. - EIA 436 77 3234b00 00bB584 7 RS-436 A.Q. L. 1.5 Collective Page 8 - APPLICABLE SECTION 6 TABLE 1 4.0 INSPECTION SAMPLE PLAN 5 TEST Operating Characteristics Static Contact Resistance DC Coil Resistance Dielectric Withstanding Voltage Insulation Resistance Visual and Mechanical 2.5 Collective

40、 I 9 10 11 6. OPERATING CHARACTERISTICS 6.1 General: This test method specified the procedures to be used in testing reed relays for pickup, nonpickup, hold, dropout, dwell and maximum values when operated by direct current. The test leads and their clips when attached to the terminals must be non-m

41、agnetic. Magnetic fields and materials should be isolated from the relay under test. Contact loads for these measurements shall be 0.050 Vdc maximum, 10 mA for low level contacts, and 6-12 Vdc, 10-100 mA for all ather contacts. Lamps with high inrush currents shall not be em- ployed. Accuracy of the

42、se measurements shall be f 3% of full scale. The specified ramp rates shall not exceed 1 ms/volt for the “Fast” rate, and 50 ms/volt for the “Slow” rate. If a step ramp is employed, the steps shall not exceed 0.1 volthncrement. When the “Fast” rate is employed, the rate shalt- be such as to not prod

43、uce excess ringing in the coil, See Figure 1 for repre- sentative ramp waveforms. 6.2 Requirements: The following requirements shall be specified: 6.2.1 Pickup, dropout, and nominal values which are applicable, 6.2.2 Nonpickup and hold values if applicable (4 element test), 6.2.3 Dwell values when a

44、pplicahle (Form C contacts), 6.2.4 Maximum or overdrive value where applicable (Form B and latching biased configurations), 6.2.5 Soak duration, polarity, and value if other than that specified, and 6.2.6 Ramp rates other than those specified. EIA V3b 77 m 323Vb00 0068585 7 m RS-436 Page 9 6.3.2 Fou

45、r- element-nonpolarized and internal-diode suppressed configurations. The following sequence shall be used: a. A soak value at nominal voltage shall be applied for a minimum of 10 ms, b. The voltage shall be decreased to zero at a fast rate, c. The voltage shall be increased at a fast rate to the no

46、npickup value, specified. The contacts shall remain in their nonoperated condition, d. The voltage shall be increased at a slow rate until the last contact pair has attained its fully operated condition. This voltage is the pickup voltage, measured, e. The voltage shall be increased at a fast rate t

47、o the specified nominal value, f. The voltage shall be decreased at a fast rate to the hold value, specified. The contacts shall remain in their fully operated condition, and * I I 0 6.3 Procedure: g. The voltage shall be decreased at a slow rate until the last contact pairreturns to its non- operat

48、ed condition. This voltage is the dropout voltage, measured. 6.3.3 Form C actuation: When specified, each Form C contact set shall be measured for dwell. The procedure is similar to the two element sequence except the measured values are taken on each Form C capsule in the relay. The following seque

49、nce shall be used: a. A soak value at nominal voltage shall be applied for a minimum of 10 ms, b. The voltage shall be decreased to zero at a fast rate, c. The voltage shall be increased at a slow rate until the normally closed contact pair opens. This voltage is the release voltage, _measured, of the normally closed contact, RS-436 Page 10 EIA 43b 77 W 3234600 00b858b O W d. The voltage shall be increased at a slow rate until the normally open pair close. This voltage is the pickup voltage, measured, Dwell is the difference between this pickup voltage and the re- leas