MIL-R-19523B

RELAYS, CONTROL

Year: 1990

Abstract: This specification covers the requirements for control relays for Naval shipboard use.
The PIN shall be of the following form, as specified (see 6.2): 
     M19523-     AC         B        H         B         A         2       (see      (see      (see      (see      (see      (see      (see    1.2.1.1)  1.2.1.2)  1.2.1.3)  1.2.1.4)  1.2.1.5)  1.2.1.6)  1.2.1.7)


The military specification number consists of a prefix M which indicates a military specification item and the specification number.
The electrical service for coil operation shall be designated by two letters as follows: 
          AC = Alternating current (ac) service.           DC = Direct current (dc) service.

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
Endurance shall be designated by a single letter as follows: 
          A = 500,000 operations.           B = 100,000 operations.           C =  25,000 operations.


The operating voltage (v) shall be designated by a single letter as follows: 
          A = 115 Volts alternating current (Vac), 60 hertz (Hz).           B = 230 Vac, 60 Hz.           C = 440 Vac, 60 Hz.           D =  28 Volts direct current (Vdc).           E = 115 Vdc.           F = 125 Vdc.           G = 230 Vdc.           H = 250 Vdc (nominal), operating range 175 to 355 volts (V), storage                battery service.           J = 500 Vdc (nominal), operating range 350 to 710 V, storage                battery service.           K = Special.


The number of poles shall be designated by a single letter as follows: 
         A =  4 poles.          B =  8 poles.          C = 12 poles.          D = 16 poles.          E = 24 poles.


The ambient temperature rating shall be designated by a single letter as follows: 
          A = 50 degrees Celsius (°C).           B = 90°C.           C = Special.


The shock classification of relay contact chatter shall be designated by a single number as follows: 
          1 = Class I   Those relays whose contacts will not chatter  in  either                           the energized or deenergized position.           2 = Class II  Those relays whose contacts will not chatter long                            enough to either drop out the relay or drop out a                            standard relay having a dropout time of 4 milliseconds                            (ms).  Contacts shall not alter state due to shock.           4 = Class III Those relays whose contacts will not chatter long enough                            to either drop out the relay or drop out a standard                            relay having a drop out time of 20 ms.  Contacts shall                            not alter state due to shock.  6 = Class IV  Those relays whose contacts will not alter state due                            shock.           7 = Class V   - No requirements for electrical operation.


Intended Use: Relays conforming to this specification are intended for use in control circuits where a number of relays are interconnected to control the proper sequencing and functioning of a complex electrical, hydraulic or pneumatic system or combination of such systems. Such relays are also required to provide suitable indication and alarm circuits directly associated with these systems. The relays are also intended for use in motor controllers, and related electrical equipment aboard both surface ships and submarines.
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