MIL-DTL-17587C(SH)
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. Circuit breakers and their attachments covered by this specification are intended for use in
Naval shipboard applications, as a device which:
a.
Maintains a closed circuit when closed.
b.
Maintains an open circuit when open.
c. Interrupts the circuit under normal operation (current not in excess of the rated continuous current of the
circuit breaker) and under abnormal conditions (currents in excess of the rated continuous current of the circuit
breaker, such as a short circuit) in accordance with the intended operation of the trip devices. In application, circuit
breakers are selected whose rated short-circuit current is as great or greater than the maximum current which they
may be called upon to interrupt.)
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
Type required (see 1.2 and the applicable specification sheet).
b.
c. Creepage and clearance set spacing and enclosure type, if other than set C spacing and enclosed type of
enclosure (see 3.3.2).
Quantity of special tools, if required (see 3.4.4).
d.
Applicable switchgear unit or circuit breaker enclosure (see 3.4.5).
e.
Selected parts to be made from thermoplastic material (see 3.4.8).
f.
g. Powder coating, method of application, curing, repair (see 3.4.9.1) and alternate test methods/acceptance
criteria for adhesion (see 3.4.9.1.5.1).
h. Manual operation for circuit breaker types ACB-900RC, ACB-901R, ACB-902R, or ACB-2000RC, if not
required (see 3.4.13.2.1).
Types of overcurrent protection required (see 3.4.16.2):
i.
(1) Overcurrent coil rating and use (see 3.4.16.1).
(2) Short-time delay required pickup current setting (see 3.4.16.2.1.2.1) and time band (see
(3) Instantaneous required pickup current setting (see 3.4.16.2.1.3).
Mounting location of transformer, if required, for electric closing power (see 3.4.17.3.e).
j.
Undervoltage release device, if required, and voltage rating (see 3.4.17.4).
k.
Undervoltage lockout device, if required (see 3.4.17.5).
l.
m. Shunt trip device, if required (see 3.4.17.6); voltage rating. If 20S nominal voltage selected, specify
whether trip current exceeds 30 A (see Table IV).
Special auxiliary switches, if required (see 3.4.17.7).
n.
Secondary disconnecting devices, quantity required (see 3.4.17.8).
o.
Hold-closed mechanism, if required (see 3.4.17.9).
p.
Operations counter (see 3.4.17.10).
q.
Indicator light with lens color, if required; indicate special type, if required (see 3.4.17.12).
r.
Trip on power up (TOPU) device (see 3.4.17.13).
s.
By-pass switches, if required (see 3.4.17.15).
t.
Conformal coating (see 3.4.18.2).
u.
Sockets, if required (see 3.4.18.3).
v.
w. Conformance inspection sampling requirements, if required (see 4.3.1).
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