MIL-PRF-39019F
4.8.2 Solderability (see 3.5). Circuit breakers shall be tested in accordance with method 208 of MIL-STD-202.
The following details and exceptions shall apply.
a.
Number of terminations to be tested: All terminals of each circuit breaker tested.
b.
Examination of terminations: Method for evaluation of lugs and tabs shall apply.
4.8.3 Dielectric withstanding voltage (see 3.6). Circuit breakers shall be tested in accordance with method 301 of
MIL-STD-202. The following details shall apply.
a.
Magnitude of test voltage: 1,250 volts (rms), for points of application 4.8.3c(1), 4.8.3c(2), and 4.8.3c(3); 500
volts (rms), for points of application 4.8.3c(4) and 4.8.3c(5). Duration of application shall be 1 minute for
qualification and group B tests; 5 seconds for group A tests.
Alternate method: Magnitude of test voltage may be increased to 1,500 volts (rms) for points of application
4.8.3c(1), 4.8.3c(2), and 4.8.3c(3); 600 volts (rms) for points of application 4.8.3c(4) and 4.8.3c(5). The time
for this application is 1 second.
b.
Nature of potential: AC.
c.
Points of application of test voltage:
(1) Between all main circuit breaker terminals tied together and actuating lever and case tied together, with
circuit breaker main contacts in closed and open positions.
(2) Between all auxiliary contact terminals tied together and main circuit breaker terminals tied together, with
circuit breaker main contacts in closed and open positions.
(3) Between poles of multiple pole breakers with the line terminal of each pole tied to the corresponding load
terminal of that pole, with circuit breaker main contacts in closed and open positions.
(4) Between all auxiliary contact terminals tied together and actuating lever and case tied together, with circuit
breaker main contacts in closed and open positions.
(5) Between each open pair of auxiliary contact terminals, with circuit breaker main contacts in closed and
open positions.
(6) Optional points of application: When test is specified to all main circuit breaker terminals tied together, the
test may be applied to individual poles.
d.
Measurement during test: The circuit shall be continuously monitored during application of the test voltage to
determine if the leakage current exceeds 0.5mA.
e.
Examination after test: Circuit breakers shall be examined for evidence of flashover, mechanical damage,
arcing, breakdown, and excessive current flow.
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