MIL-DTL-17361G(SH)
4.5.4.3.1.2 Attachment leads used as test points.
4.5.4.3.1.2.1 Electric operating mechanism. Tie all electric operator mechanism leads together and apply
specified voltage between lead bundle and electric operating mechanism housing.
4.5.4.3.1.2.2 Undervoltage release, shunt trip, and auxiliary switch. With the circuit breaker closed, the voltage
shall be applied between attachment leads and mounting base/block line/load side terminals as marked with an "X"
in Table X.
TABLE X. Dielectric strength test points (mounting base/block terminals, attachment leads, and
ground).
Mounting base/block terminals
Ground
Attachments
Left pole
Center pole
Right pole
UVR /1
X
X
X
X
Shunt trip /1
X
X
X
X
Aux switch /1
X
X
X
X
NOTE:
/1 Leads shall be tied together and voltage applied between the tied bundle and the
points specified.
4.5.5 Insulation resistance.
4.5.5.1 Test equipment. Insulation resistance shall be measured with a 500-volt insulation resistance testing
device.
4.5.5.2 Test points and conditions. Insulation resistance shall be measured between the same test points and
under the same conditions as specified in 4.5.4.3.1.
4.5.5.3 Pass/fail criteria.
4.5.5.3.1 10-megohm threshold. The insulation resistance shall be greater than 10 megohms for the following
insulation resistance tests:
Table V: Test No. 10
Table VI: Test No. 11
4.5.5.3.2 1-megohm threshold. The insulation resistance shall be greater than 1 megohm for the following
insulation resistance tests:
Table V: Test No. 14
Table VI: Test No. 17
4.5.6 Attachment electrical characteristics. Electric operating mechanisms, undervoltage releases, and shunt
trips shall be tested to verify they operate in accordance with electrical characteristics specified in Tables II, III (a),
III (b), and IV and other electrical characteristics as noted.
4.5.6.1 Electric operating mechanisms.
4.5.6.1.1 Voltage range. Two checks shall be conducted at the minimum, nominal, and maximum voltage in
the range. With the circuit breaker in the closed position, the mechanism shall open and reclose the circuit breaker
during each check.
4.5.6.1.2 Closing time. Closing time shall not exceed 1/2 second. Closing time shall be measured from the
initial rise in the close signal voltage to the first indication of continuity across the circuit breaker poles.
4.5.6.2 Undervoltage release.
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