MIL-DTL-17587C(SH)
TABLE I. Temperature rise limits./1
Maximum
Maximum
temperature rise
temperature with
Temperature
Parts
above enclosure
50 °C enclosure
rise test
external ambient
external ambient
(°C)
(°C)
Insulation
Pre-
interruption at
65
105
Class A
rated current
80
130
Class B
105
155
Class F
130
180
Class H
70
120
Terminals
80
130
Contacts
80
130
Conducting mechanical joints
Insulation
Pre-
interruption at
Class A
150% rated
Class B
current and 5-
Class F
minute
Class H
duration
85
135
Terminals
Contacts
85
135
Conducting mechanical joints
Insulation
Post-
interruption at
97.5
147.5
Class A
rated current
120
170
Class B
157.5
207.5
Class F
195
235
Class H
105
155
Terminals
120
170
Contacts
120
170
Conducting mechanical joints
NOTES:
/1 See specification sheets for any exceptions to Table I temperature criteria.
3.4.10.3 Dielectric strength.
3.4.10.3.1 Application points on circuit breaker poles and ground. Unless otherwise specified in the
specification sheets, insulation in as-new condition shall be able to withstand without breakdown a 60 Hz voltage
of 1900 volts for a period of 1 minute when applied in accordance with 4.5.10 and Tables XV and XVI. As circuit
breakers are cycled and tested for qualification, dielectric strength requirements at 60 percent of values listed above
may apply. See 4.5.10 for these test requirements.
3.4.10.3.2 Application points on control wiring (excluding charging motor), circuit breaker poles, and ground.
Insulation in as-new condition shall be able to withstand without breakdown a 60 Hz voltage of twice the rated
voltage plus 1000 volts for a period of 1 minute when applied in accordance with 4.5.10 and Table XVII. As
circuit breakers and attachments are cycled and tested for qualification, dielectric strength requirements at 60
percent of values listed above may apply. See 4.5.10 for these test requirements.
6
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