MIL-DTL-17361G(SH)
3.5.19.4.1 Time delay. Time delay requirements shall be as follows:
a. With the 33-VDC coil of Table III (a) shunted by a 150-ohm resistor, the circuit breaker shall trip within 67
milliseconds after the voltage is step-reduced from 33 VDC to 3.3 VDC (100 percent to 10 percent). With no shunt
resistance connected external to the 33-VDC coil, it shall remain sealed-in during an absence of input voltage for a
minimum of 7 milliseconds with the device operating at 26.4 VDC (80 percent).
b. The other undervoltage release devices of Tables III (a) and (b) shall remain sealed-in during an absence of
input voltage for a minimum of 7 milliseconds with the device operating at the normal voltages specified in Tables
III (a) and III (b).
3.5.19.5 Shunt trip (see 6.4.25). When specified (see 3.1 and 6.2), a shunt trip device shall be provided and
shall have the following characteristics:
a.
The device shall meet the applicable operational requirements shown in Table IV.
b. The 115-volt, 60-Hz and 450-volt, 60-Hz shunt trip devices shall be field replaceable for circuit breaker
frame sizes above 100 amperes. The 28-VDC shunt trip shall also be field replaceable.
c.
The device shall be simple and compact and shall be remotely controlled.
d.
Coils shall be available for tripping from either an AC or DC voltage source.
e. The shunt trip device shall have a normally open auxiliary switch contact ("a" type) connected in series
with its coil.
f. Connecting leads, adequately marked, shall extend from the back, end, or sides of the circuit breaker
enclosure for a minimum of 30 inches.
TABLE IV. Shunt trip device operational requirements.
Maximum watts
Endurance
Nominal voltage
Voltage range
during inrush current
28 DC
26.436.3
90
1500
120 DC
70140
100
1500
250 DC
175355
50
1500
115 AC, 60 Hz
90130
650
1500
115 AC, 400 Hz
90130
650
1500
450 AC, 60 Hz
360500
500
1500
3.5.19.6 Auxiliary switches. When specified (see 3.1 and 6.2), circuit breakers shall be provided with an
auxiliary switch (see 6.4.3) or switches having the minimum number of contacts as specified. An auxiliary switch or
switches shall be mounted within the circuit breaker housing. Connecting leads, adequately marked, shall extend
from the enclosure for a minimum of 30 inches. Contacts designated "a" shall be closed when the circuit breaker is
closed. Contacts designated "b" shall be closed when the circuit breaker is open. The nominal voltage for the
auxiliary switches shall be either 115 or 450 volts for 60 Hz, 115 volts for 400 Hz, or 120 volts for DC. Each
contact shall have a minimum continuous current carrying capacity of 10 amperes for AC and 10 amperes for DC.
3.5.19.7 Handle locking device. When specified (see 3.1 and 6.2), a handle locking device (see 6.4.12) shall be
provided as a part of the circuit breaker. The device shall be in accordance with Figure 3.
3.5.19.8 Handle boot. When specified (see 3.1 and 6.2), a handle boot (see 6.4.11) shall be provided. The boot
shall be molded using silicone rubber having the characteristics specified. The handle boot shall meet the
requirements of ASTM D412, D624, D2240, and A-A-59588 as specified (see 3.1). The boot shall fit securely in
the opening in a switchboard or panel front and provide a splashproof protective cover over the circuit breaker front.
The circuit breaker handle shall be operated through the boot.
12
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business