MIL-DTL-17587C(SH)
3.4.17.11 Mechanical position indicators. Circuit breakers shall be provided with mechanical position
indicators that show whether the main contacts of the circuit breaker are opened or closed. The indicators shall be
plainly visible at a minimum angle of 45 degrees from either side of the indicator, when the circuit breaker is
installed in its specified enclosure.
3.4.17.12 Indicator light. Unless otherwise specified (see 6.2), circuit breaker face plates shall have provisions
for the mounting of two indicator lights. One light shall indicate when the circuit breaker is closed and the other
light shall indicate when the circuit breaker is open. Each light shall be of a different color. Lens style and lens
coloring shall be as specified (see 6.2).
3.4.17.13 Trip on power up (TOPU) device. When specified (see 6.2), a TOPU device shall be provided to trip
the circuit breaker without intentional delay if the circuit breaker is left closed in the absence of control power and
the control power is subsequently restored. The TOPU device shall not trip the circuit breaker during momentary
control power absences of 20 milliseconds or less.
3.4.17.14 Rack-in/rack-out position indicator. When provided, position indicators that show what position the
circuit breaker is in during rack-in and rack-out shall meet the requirements specified herein. The available positions
shall be specified in the qualification package. The indicator shall include the words "Connect", "Test", and
"Disconnect" and shall plainly show when the circuit breaker is in those positions. The indicator shall be located as
closely as possible to the access for the rack-in/rack-out mechanism.
3.4.17.15 By-pass switch and cell switch. When specified (see 6.2), a by-pass switch (see 6.3.1) shall be
provided. The by-pass switch is comprised of a normally closed limit switch (cell switch) mounted on the cradle and
connected to the stationary secondary contacts in parallel with a normally closed auxiliary switch. The cell switch
shall open when the circuit breaker is in the connect or test position and close when the circuit breaker is in the
disconnect or withdrawn position. The cell switch rating shall be the same as the auxiliary switch rating of
3.4.18 Semiconductor devices.
3.4.18.1 Electrostatic discharge susceptible items. Electrostatic discharge control for the protection of
electrical and electronic parts, components, assemblies, and equipment shall be in accordance with MIL-STD-1686.
Items which are subject to damage by electrostatic discharge, such as metal oxide semi-conductors (MOS) whether
installed in equipment or held as parts for original installation or as spares, shall be protected against such damage.
The package shall be provided with a warning label for handling with care on electrostatic discharge.
3.4.18.2 Conformal coating. Conformal coating shall be provided for printed wiring in accordance with
IPCCC-830, unless otherwise specified (see 6.2).
3.4.18.3 Sockets. When specified (see 6.2), sockets specified by MIL-DTL-83734 shall be used for all dual-
inline package integrated circuit components.
3.4.19 Designation and marking. Identification plates and other designating marking for circuit breakers shall
be in accordance with MIL-STD-130 and Type A, B, or C of MIL-P-15024/5. Plates shall be installed on and
furnished as part of the circuit breaker. Plates shall be attached to the part of the circuit breaker which will not
ordinarily be renewed during normal service life, and be located in a readily accessible position where they can be
read at all times without danger to personnel.
3.4.19.1 Markings for attachments and small components. Markings for attachments and small components
shall be in accordance with MIL-STD-1285.
12
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business