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MIL-PRF-83383 Circuit Breakers, Remote Control, Thermal, Trip Free General Specification ForThis specification covers the general requirements and test procedures for single and triple pole, trip-free, thermal, remote control circuit breakers for use in electric systems conforming to MIL-STD-704. These remote control circuit breakers are capable of being remotely set or tripped and provide indication of the main contact position by use of a 0.5 ampere, push-pull, trip-free circuit breaker \(not covered by this specification\). These remote control circuit breakers include auxiliary contacts \(see 6.5.4\) and terminals for control/monitor circuits. Hereinafter, a remote control circuit breaker is referred to as an RCCB \(see 6.9\).

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TABLE X. Interrupting capacity test procedure.
Transient rms voltage
Test
Test description 1/
Operations 2/
System
Open circuit
Calibrated fault
after calibrated fault
designation
voltage (volts)
current (amperes)
current interrupt (volts)
A
Available current short
2 CO at sea level
Current specified (see 3.1)
120 within 3 cycles
120 ±5
circuit interruption (ac)
2 CO at 50,000 feet
'Y' connected 400
in 10 to 25 cycles after
150 within 6 cycles
Hz
B
Available current close-
2 OCO at sea level
115/200 volts
fault initiation. Power factor
165 maximum
in interruption (ac)
.4 to .5 lagging
2 OCO at 50,000 feet
C
Available current short
2 CO at sea level
Current specified (see 3.1) in
30 ±2
circuit interruption (dc)
2 CO at 50,000 feet
28 Vdc
0.01 to 0.03 second after
28 within 0.002 second
D
Available current close-
2 OCO at sea level
fault initiation
50 maximum
in interruption (dc)
2 OCO at 50,000 feet
Instantly available
1 CO at 50,000 feet 3/
120 within 3 cycles
120 ±5
E
intermediate current
1 OCO at sea level 3/
'Y' connected 400
165 maximum
Hz
interruption (ac)
115/200 volts
2000%
Instantly available
1 CO at 50,000 feet 3/
1000%
28 within 0.002 second
30 ±2
F
Intermediate current
1 OCO at sea level 3/
28 Vdc
750%
50 maximum
interruption (dc)
500%
1 CO at sea level
Single phase
120 within 3 cycles
120 ±5
G
Available current short
1 CO at 50,000 feet
150 within 6 cycles
circuit (ac) for 3-pole
165 maximum
RCCB's only
3-phase
205 within 3 cycles
1 CO at sea level
205 ±5
1 CO at 50,000 feet
'Y' connected 400
Current specified (see 3.1) in
255 within 6 cycles
Hz
115/200 volts
10 to 25 cycles after fault
280 maximum
1 OCO at sea level
Single phase
initiation. Power factor .4 to
120 within 3 cycles
120 ±5
H
1 OCO at 50,000 feet
.5 lagging
150 within 6 cycles
Available current close-
in interruption (ac) for
165 maximum
3-pole RCCB's only
1 OCO at sea level
3-phase
205 within 3 cycles
205 ±5
1 OCO at 50,000 feet
255 within 6 cycles
280 maximum
2/ CO is an operation in which the RCCB is closed before initiation of the fault. OCO is an operation in which the fault is initiated,
and the RCCB is closed to complete the fault.
3/ For each value of fault current specified.



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