MIL-DTL-17361G(SH)
TABLE XIV (b). Example of long-time delay and long-time thermal memory testing (AQB-A252 circuit breaker).
Actual trip time
Current level
Required
All poles
applied
trip time
Left pole
Center pole
Right pole
(3-phase)
Enter trip time
Enter trip time
Enter trip time
Enter trip time
1.35X continuous
(must be > 1
(must be > 1
(must be > 1
(must be > 1
> 1 Hour
current setting (CCS)
hour)
hour)
hour)
hour)
Enter trip time
Enter trip time
Enter trip time
Enter trip time
(must be < 1
(must be < 1
(must be < 1
(must be < 1
1.65X CCS
< 1 Hour
hour)
hour)
hour)
hour)
Enter trip time
Enter trip time
Enter trip time
Enter trip time
(must be 35-55
(must be 35-55
(must be 35-55
(must be 35-55
4X CCS
35 -55 sec.
sec.)
sec.)
sec.)
sec.)
Enter trip time
Enter trip time
Enter trip time
Enter trip time
(must be 20-32
(must be 20-32
(must be 20-32
(must be 20-32
6X CCS
20 -32 sec.
sec.)
sec.)
sec.)
sec.)
Enter trip time
Enter trip time
Enter trip time
Enter trip time
(must be less
(must be less
(must be less
(must be less
Long-time thermal
than column
than column
than column
than column
< 6X CCS
memory test (6X
entry
entry
entry
entries above
entry
CCS)
immediately
immediately
immediately
immediately
above)
above)
above)
above)
29
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