NEW GENERAL PUUl'OSE HELAY 



1059 



be atljusted so tluit the load may be picked up at any tlesired point in 

 the armature travel. 



When a relay is designed tor a specified release lime, the spi'ead l)e- 

 twceu maximum and minimum times obtained with a particular sleeve 

 is usually greater than desired. Accordingly a sleeve is selected which 

 under normal conditions would produce a somewhat longer time than 

 the specified value. This time is then reduced, as needed, by increasing 

 the buffer spring tension. 



Typical release times plotted as a fiuiction of the contact load for AG 

 relays with and without sleeves are shown in Fig. 29. Since this figure 

 illustrates release times that are characteristic of the various sleeves, no 

 bufTer spring tension is assumed. As would be expected, the heavier 

 sleeves produce the longer release times, which are also greater for relays 

 wth fewer contacts. Even the light aluminum sleeve produces several 

 times longer release times than no sleeve at all. For comparison, release 

 times are also shown for the AJ relay, which has a magnetic structure 

 similar to the AG but with nonmagnetic separators in place of the 

 spherical embossing on the armature. The difference between the AJ 



0.8 

 0.6 



0.4 

 0.3 



0.1 

 0.08 



0.04 

 0.03 



0.02 



0.01 

 0.008 



0.006 



0.004 

 0,003 



6 8 10 12 14 16 18 



NUMBER OF CONTACT PAIRS 



20 22 24 



Fig. 29 — Typical release times of AG and AJ relays. 



