Remote Controlled Circuit Breaker (RCCB) — 1 Pole and 3 Pole
Engineering Data
#4 and/or terminal A1 (28 Vdc
Description
or 115V 400 Hz) on 1PST RCCB:
to terminal #4 (28 Vdc) and/or
both terminals B1 and C1 (115V
400 Hz) on 3PST RCCB, the
RCCB will assume the state
requested/indicated by the I/CU.
If power is removed from termi-
nal #4 and A1 on 1PST or from
terminal #4 and both B1 and C1
on 3PST, the RCCB will remain
in the state it was in prior to
power removal. When power is
reapplied to the terminals, the
RCCB will assume the state
indicated by the I/CU.
The Remote Control Circuit
Breakers (RCCB) concept, as
load controllers in distributed-
load applications, provides for a
more efficient power distribution
system with less line loss at a
lower cost and with less weight
than the conventional relay-flight
deck circuit protector method.
Designed to meet the require-
ments of MIL-PRF-83383, the
RCCB's capability and advan-
tages include:
• Fusible link fail safe
• Remote on/off operation from
the flight deck
• Visual indicators for open
(green) and closed (red) on
top surface
• Substantial reduction in
weight and size
• Most direct route from power
source to load
• Single wire control line from
I/CU to RCCB
• Double-break power contact
assembly
• Indication of trip or set by
position of the ½ ampere cir-
cuit breaker on the flight deck
• Elimination of long runs of
heavy and costly cables
• Magnetically latched coils
(low power consumption)
• Use as a relay or circuit
breaker or both
• Flanges mate for in-line or
side-by-side mounting
• 1PST FOR DC OR SINGLE
PHASE AC
100 Megohms minimum
• Aircraft Electrical Power. MIL-
STD-704
With the RCCB closed, an over-
load or fault current on any line
or lines will cause the RCCB
to trip and in turn will cause a
controlled overload of the I/CU,
causing it to trip also. A fault or
overload on any power contact
will cause the RCCB to trip open
within the time limits specified
regardless of the availability of
coil power. To reclose the RCCB,
the I/CU line (line 3 to ground)
must be opened by the I/CU or
series switch and reconnected
to ground.
• Vibration. 10 g's to 2000 Hz.
MIL-STD-202, Test Method
204. Condition C (-54°C,
25°C, and 71°C). Maximum
duration of contact transfer to
-6
uncommanded state: 10x10
seconds.
• Shock. 25 g's. MIL-STD-202,
Test Method 213. Maximum
duration of contact transfer to
-6
uncommanded state: 10x10
seconds.
• Altitude. 50,000 feet
• EMI, MIL-STD-461, Class 1D
• Moisture Resistance. MIL-
STD-202, Test Method 106
• Fungus Resistance. MIL-STD-
454, Guideline 4
• Sand and Dust Resistance.
MIL-STD-202, Test Method
110, Test Condition A
Other Performance
Parameters For MIL-PRF-
83383
• Coordination. An overload
applied to two devices in
series with a 2 to 1 current
rating will result in only the
lower rated device opening.
• Rupture capability to 3600A
(115 Vac rms or 28 Vdc for
SM600BA and 115 Vac rms
for SM601BA series)
• Dielectric. 1500 V, 60 Hz, MIL-
STD-202, Test Method 301,
0.5 MA maximum
• Explosion-proof. MIL-STD-202,
Test Method 109
• Thermal Temperature Range. -
54°C to 71°C (-65°F to 160°F).
MIL-STD-202, Test Method
107
• Insulation Resistance. MIL-
STD-202, Test Method 302,
• Salt Spray Resistance. MIL-
STD-202, Test Method 101,
Test Condition B
• 3PST FOR THREE PHASE AC
ONLY
Application
The Remote Control Circuit
Breaker (RCCB) is a combination
relay and circuit breaker which
can be released or set by apply-
ing a release or set coil current
electronically controlled by a
command from the Indicator/
Control Unit (I/CU) (a ½ ampere
fast trip, thermal circuit breaker).
With power available to terminal
EATON CORPORATION Aerospace TF300-9 January 2005
15
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