SM600BA5A1 [EATON]
Remote Controlled Circuit Breaker (RCCB);
| 型号： | SM600BA5A1 |
| 厂家： | 
Eaton All Rights Reserved. |
| 描述： | Remote Controlled Circuit Breaker (RCCB) |
| 文件： | 总10页 (文件大小：233K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Remote Controlled Circuit Breaker (RCCB)
Three Phase
• 115/200 VAC 400 Hz
• Three Phase Only
Single Pole
• 28 VDC
• 115/200 VAC 400 Hz
Qualified
PERFORMANCE DATA
Qualified to demanding perfor-
Rupture Levels
3600 A (115 VAC or 28VDC for 1Pole and 115VAC for 3 Pole)
50,000 Cycles
mance parameters of MIL- PRF
- 83383 standard.
Endurance
(Resistive & Inductive(Motor)
Endurance (Motor)
Use as a Relay, Circuit Breaker, Or
Both
5-50A: 50,000 cycles; 60-100A: 25,000 cycles
Endurance (Lamp)
Dielectric Strength
Insulation Resistance
ThermalTemperature Range
5-25A: 50,000 cycles; 35-50A: 25,000 cycles; 60-100A: no rating
1500V, 60Hz, MIL-STD-202, method 301, 0.5 MA max
100 mega ohm min, MIL-STD-202, method 302
RCCBs combine the best attri-
butes of a circuit breaker and a
relay. Automatically protects the
wires and the load device dur-
ing circuit/load breakdown, but
allows the flight deck control of
the load during normal opera-
tion.
-54°C to 71°C (-65°F to 160°F). MIL-STD-202, Method 107
Vibration
10G's to 2000 Hz. Exceeds MIL-STD-202, Method 204, Condition
C, 10 microseconds max. chatter
25G's. MIL-STD-202, Method 213, 10 microseconds max. chatter
50,000 ft.
Shock
Altitude
Weight and Cost Savings
In distributed-load applications,
RCCBs are a more efficient
power distribution solution pro-
moting cost and weight savings
through the elimination of long
runs of heavy cables associ-
ated with the conventional relay
- flight deck circuit protector
method. Control of the RCCB
requires only one #22 AWG
control wire from the ICU on the
flight deck to the RCCB.
EMI Requirements
MIL-STD-461, Requirements CS114 and RE102 over the frequency
range of 14 KHz to 400 MHz and RE102 limits for Aircraft and
Space Systems.
EMI/RFI Susceptibility
and Generation
MIL-STD-461, Class 1D
Moisture Resistance
Salt Spray Resistance
Sand and Dust Resistance
Fungus Resistance
Explosion Proof
MIL-STD-202, method 106
MIL-STD-202, method 101, Condition B
MIL-STD-202, method 110, Condition A
MIL-HDBK-454, Guideline 4
MIL-STD-202, method 109
Weight (Single Pole)
5-25A: 318 grams (0.703 lbs.); 35-50A: 325 grams (0.719 lbs.); 60-
100A: 332 grams (0.734 lbs.)
Cockpit Space Savings
An RCCB system removes the
presence of large circuit break-
ers from the cockpit while per-
mitting remote On/Off operation
from the flight deck. Combine
Eaton RCCB with Indicator
Control Unit (ICU) model #1500-
052-05.
Weight (w/ Auxiliary Contacts)
5-25A: 332 grams (0.734 lbs.); 35-50A: 339 grams (0.750 lbs.); 60-
100A: 346 grams (0.766 lbs.)
Weight (Three Phase)
2.0 lbs. max.
OVERLOAD CALIBRATION DATA
@ 25°C
@ +71°C
@ -54°C
MAX
TestTime
Parameters
% for 1 Hour
Specification
Table
Must Hold
Must Trip
MIN MAX
MAX
MIN
115%
MIN
115%
115%
138%
138%
% Within 1 Hour
150%
10
EATON CORPORATION Aerospace TF300-0 January 2005
Remote Controlled Circuit Breaker (RCCB)
Engineering Data
Single Pole SingleThrow (Double Break Contacts)
Rated Contact Load (Amperes)
28Vdc
115/200V 400 Hz
Catalog
Number
MIL-PRF-83383
Part Number
Maximum
Weight Oz/gm
1
Res.
Ind. Motor Lamp
Res. Ind. Motor Lamp
SM600BA5A1
SM600BA5N1
SM600BA10A1
SM600BA10N1
SM600BA15A1
SM600BA15N1
SM600BA20A1
SM600BA20N1
SM600BA25A1
SM600BA25N1
SM600BA35A1
SM600BA35N1
SM600BA40A1
SM600BA40N1
SM600BA50A1
SM600BA50N1
SM600BA60A1
SM600BA60N1
SM600BA75A1
SM600BA75N1
5
5
10
5
10
5
5
5
5
5
M83383/02-01
M83383/01-02
M83383/02-03
M83383/01-03
M83383/02-04
M83383/01-04
M83383/02-05
M83383/01-05
M83383/02-06
M83383/01-06
M83383/02-07
M83383/01-07
M83383/02-08
M83383/01-08
M83383/02-09
M83383/01-09
M8338/02-10
M83383/01-10
M83383/02-11
M83383/01-11
M83383/02-13
11.75/332
11.25/318
11.75/332
11.25/318
11.75/332
11.25/318
11.75/332
11.25/318
11.75/332
11.25/318
12.00/339
11.50/325
12.00/339
11.50/325
12.00/339
11.50/325
12.25/346
11.75/332
12.25/346
11.75/332
12.25/346
10
15
20
25
35
40
50
60
75
10
15
20
25
35
40
50
—
—
—
10
10
10
10
15
20
25
35
40
50
—
—
—
15
20
25
35
40
50
60
75
100
15
20
25
35
40
50
60
75
100
15
20
25
35
40
50
60
75
100
15
20
25
35
40
50
60
75
100
15
20
25
35
40
50
60
75
100
SM600BA100A1 100
SM600BA100N1
M83383/01-13
11.75/332
Three Pole SingleThrow (Double Break Contacts)
Rated Contact Load
(Amperes)
115/200V 400 Hz
Catalog
Number
MIL-PRF-83383
1
Res. Ind. Motor Lamp Part Number
SM601BA10A1
SM601BA15A1
SM601BA20A1
SM601BA25A1
SM601BA35A1
SM601BA40A1
SM601BA50A1
SM601BA60A1
10
15
20
25
35
40
50
60
10
15
20
25
35
40
50
60
10
15
20
25
35
40
50
60
10 M83383/04-03
15
20 M83383/04-05
25
35 M83383/04-07
40 M83383/04-08
50
1 Contact factory on alternate amperage, trip times, control configura-
tions, grounding, auxiliary switches, and mounting systems.
60 M83383/04-10
EATON CORPORATION Aerospace TF300-9 January 2005
11
Remote Controlled Circuit Breaker (RCCB)
ORDERING INFORMATION
Three Pole SingleThrow (Double
Break Contacts)
Single Pole SingleThrow (Double Break Contacts)
Standard
w/Auxiliary Contacts
w/Auxiliary Contacts
MS P/N
EATON P/N
MS P/N
EATON P/N
AMPERE
MS P/N
EATON P/N
RATING
5
7. 5
10
15
20
25
35
40
50
M83383/01-01
**
**
SM600BA5N1
**
M83383/02-01
SM600BA5A1
**
M83383/01-03
M83383/01-04
M83383/01-05
M83383/01-06
M83383/01-07
M83383/01-08
M83383/01-09
M83383/01-10
M83383/01-11
SM601BA10A1
M83383/04-03
SM601BA15A1
SM601BA20A1
M83383/04-05
SM601BA25A1
SM601BA35A1
M83383/04-07
SM601BA40A1
M83383/04-08
SM600BA10N1
SM600BA15N1
SM600BA20N1
SM600BA25N1
SM600BA35N1
SM600BA40N1
SM600BA50N1
SM600BA60N1
SM600BA75N1
**
M83383/02-03
M83383/02-04
M83383/02-05
M83383/02-06
M83383/02-07
M83383/02-08
M83383/02-09
M83383/02-10
M83383/02-11
SM600BA10A1
SM600BA15A1
SM600BA20A1
SM600BA25A1
SM600BA35A1
SM600BA40A1
SM600BA50A1
SM600BA60A1
SM600BA75A1
**
SM601BA50A1
SM601BA60A1
M83383/04-10
60
75
80
100
*
*
*
*
M83383/01-13
SM600BA100N1
M83383/02-13
SM600BA100A1
All Ampere Ratings equal to Rated Contact Loads (Resistive, Inductive, Motor, and Lamp) except as noted.
* No Lamp Load Rating
** Contact Factory
Note: Contact factory on alternate amperage, trip times, control configuations, grounding, auxilary switches, mounting systems, etc.
SINGLE POLE
TRIPLE POLE
OVERLOAD CALIBRATION DATA
OVERLOAD CALIBRATION DATA
TrippingTime
Percent
Rated Current
AmbientTemperature
Degrees C. 5°
Ratings
TrippingTime
Percent
Rated Current
AmbientTemperature
Degrees C. 5°
Ratings
No Trip
1 Hour Max.*
No Trip
115%
138%
115%
150%
25°C & 71°C
-54°C
All
No Trip
1 Hour Max.*
No Trip
115%
138%
115%
150%
25°C & 71°C
-54°C
All
1 Hour Max.*
1 Hour Max.*
* Must trip in one hour.
* Must trip in one hour.
OVERLOAD CALIBRATION DATA —THREE POLE
OVERLOAD CALIBRATION DATA — SINGLE POLE
200%TripTimes
-54°C to +71°C
400%TripTimes
-54°C to +71°C
1000%TripTimes
-54°C to +71°C
200%TripTimes
-54°C to +71°C
400%TripTimes
-54°C to +71°C
1000%TripTimes
-54°C to +71°C
AMPERE
RATING
AMPERE
RATING
MIN
MAX
MIN
MAX
SECONDS
6.4
MIN
SECONDS
MAX
SECONDS
1.3
1.2
1.15
1.3
1.3
1.3
1.25
1.8
MIN
MAX
MIN
MIN
SECONDS
0.3
0.33
0.42
0.35
0.4
MAX
SECONDS
80
MAX
SECONDS
1.2
1.1
1.05
1.2
1.15
1.3
1.3
1.3
1.25
1.8
SECONDS SECONDS SECONDS
AMPERES
SECONDS SECONDS SECONDS
AMPERES
2.8
1.7
2.9
2.6
2.8
2.6
2.9
2.4
11
10
9.6
10
11
10
10
16
0.42
0.35
0.4
5
7. 5
10
12
13
14
15
16
16
13
13
7
40
40
42
45
46
50
55
55
55
60
60
60
63
1.2
2.4
2.8
1.7
2.9
2.6
2.8
2.9
2.9
2.6
2.5
2.7
3.5
10
15
20
25
35
40
50
60
6.8
8.5
8.3
7. 6
8.7
8.3
9.2
10
13
13
12.5
13
11
12
13
14
15
16
16
13
13
13
14
17
80
80
80
80
80
80
80
15
20
25
35
40
50
60
75
80
100
0.4
0.35
0.36
0.4
0.4
0.35
0.36
0.4
0.26
0.26
0.3
0.26
1.8
2
1.9
0.38
TRIP CURVE
Contact business unit for trip curve.
12
EATON CORPORATION Aerospace TF300-0 January 2005
Remote Controlled Circuit Breaker (RCCB)
Engineering Data
Application Note
Distributed Load Concept
With RCCB
Without RCCB
1/2 AMP
SWITCH
SWITCH
C8
1/2 AMP
100 AMPS
RCCB
B
U
S
S
C8
L
O
A
D
100 AMPS
RELAY
B
MS22073-1/2 OR
MS26574-1/2
L
U
S
S
100 AMPS
C8
O
A
D
FLIGHT DECK
FLIGHT DECK
Typical Wiring Diagrams
Integrated Wire Termination Module
(MIL-STD-1549)
LOAD
LINE
A1
A2
LOAD
LINE
LINE
LINE
5B 6
3
4
5A
LOAD
LOAD
S3
S1 S2
Auxiliary Contacts When Applicable
Internal Connection
To Indicator/
Control Unit
3
4 5A 5B
Circuit Breaker
Type MS22073-
1/2 OR
S3 S1 S2
Auxiliary Contacts
To Indicator/
Control Unit
Backup Control Power (when used)
115 V 400 HZ or 28 Vdc
(Must be same AC Phase as the
“Line” Power)
Internal Connection
MS26574-1/2
Backup Control
Power (when
used) 28 Vdc
Circuit Breaker
Type MS22073-
1/2 OR
MS26574-1/2
Contacts and Coil
Circuits Only
Wiring for Multiple
Line Protection
6
3
5A 5B
4
Contacts and Coil
Circuits Only
S2
Auxiliary Contacts
S1
6
6
3
3
5A 5B
5A 5B
4
4
S1
A1
S2
S3
S3
A2
A1
B1
C1
A2
B2
Intermittent Duty
Coils Current
Cut-Off Controlled
Electronically
C2
Intermittent Duty
Coils Current
Cut-Off Controlled
Electronically
Single Pole
NOTE: Terminals 5A and 5B internally grounded to the mounting leg (s). Integrated Wire
Termination (IWT) module accepts pin contacts P/N M39029/1-100 or -101. Use with
insertion/extraction tool M81969/14-02.
Three Pole
EATON CORPORATION Aerospace TF300-9 January 2005
13
Remote Controlled Circuit Breaker (RCCB) — 1 Pole and 3 Pole
Engineering Data
Approximate Dimensions - 1 Pole
Typical Placement of
Rating on Top Plane
.172/4.37 DIA.
2 MTG. HOLES
Options
R. 20
5.08
•
Special application auxiliary
switches
Unique grounding
Power sources
Other current ratings
Control via systems other
than I/CU
Low level auxiliary con-
tacts available
Data Bus/Interface capabil-
ity available
Electronically held coil
Moisture resistant sealing
.688/
17.48
•
•
•
•
50
Mtg. Flanges
2.940
74.68
3.250
82.55
2.250
57.15
Main Contact
Mate As Shown
Position Indicator
Red: Closed; Green: Open
1.200
30.48
•
•
.350
8.89
.42
10.67
1.530
38.86
.07
1.778
.056
1.42
.500 - .610
12.70 - 15.24
•
•
.180
4.57
Name
Plate
4.26
108.20
3.42
86.87
.084
2.13
Three Pole
3.69
93.73
Main Contact
Position Indicator
Red: Closed;
Green: Open
2.28
57.91
3.29
.07
1.78
83.57
.350
8.89
2.03
1.50
38.86
51.56
.77
19.56
2.526
64.16
.05
1.27
2.526
64.16
4.26
108.20
Location of
NamePlate
3.43
87.12
.130
3.30
2.940
74.68
3.250
82.55
Coil Operate Current/Set AndTripTime RCCB
Set Coil
Current
@ Nom
Voltage
Pulse
MAX. Set Time
*I/CU. Trip Current Nominal
71°C &
I/CU Set
Current
@ Nom
Voltage
(Mulliamp)
MAX.
Standby
Current
Voltage Milliamp
Circuits
Nominal
System
Voltage
Most Adverse
Condition - MIN.
Voltage 71°C.
Ambient
-54°C &
71°C &
Nominal
Voltage
-54°C & RoomTemp.
Nominal
Voltage &
RoomTemp.
Nominal Nominal
Voltage
Nominal
Voltage
Nominal
Voltage
3.0 AMP
MAX
2
2
2
2
35 Millisec
30 Millisec
0.9 AMP 2.1 AMP
***
10
10
1.4 AMP
28 Vdc
(18 Volts MIN.)
115 Vac
400 Hz (104 V.
MIN.
28 Vdc
(18 Volts MIN.)
115 Vac
1.9 AMP
1.6 AMP
20 Millisec
15 Millisec
1 Pole
3 Pole
10 AMP
MAX
6.1 AMP
**
7.0 AMP
**
6.8 AMP
**
6.3 AMP
**
8.6 AMP
**
7.0 AMP
MAX
13.0 AMP
MAX
35 Millisec
30 Millisec
0.9 AMP 2.2 AMP
***
4.0 AMP 3.1 AMP
10
10
1.5 AMP
2.0 AMP
1.7 AMP
20 Millisec
15 Millisec
4.3 AMP
**
400 Hz (104 V.
MIN.)
3.3 AMP
**
4.5 AMP
**
**
**
2
* MAX. I/CU. Line Impedance 7.5
Current Decreases w/Time so that I t
** Average Half-Wave Rectified DC Current
***Absolute Min. Value from -54° to +71°C
14
EATON CORPORATION Aerospace TF300-0 January 2005
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
Remote Controlled Circuit Breaker (RCCB)
LOAD-L1
K
LOAD-L2
Single Pole
Design Concept
Introduction
BI-METAL
• 28 VDC
• 115/200 VAC 400 Hz
J
E-PIVOT
STATIONARY
CONTACTS
Part of the weight of the mod-
MOVEABLE
CONTACT
BRIDGE
Three Phase
• 115/200 VAC 400 Hz
• Three Phase Only
N
G-PIVOT
ern jet aircraft comes from
H-LATCH
L-LEVER
D
I
the electrical wires and power
LATCH
BAR
control systems needed to dis-
tribute the electrical energy. As
these aircraft increase their pas-
senger carrying capability, the
electrical power management
system becomes more complex
and could become heavier. Wire
runs of more than 300 feet from
the flight deck circuit breakers to
the load become common.
C
M
ARMATURE
Qualified
Meets MIL-PRF-83383
B
TRIP
(OPEN)
COIL
SET
(CLOSED)
COIL
A
Weight and Cost Savings
Saves fuel by eliminating long
runs of heavy, costly cables
T1 T2
S1
S2
PERMANENT MAGNET
Space Savings
Keeps larger breakers out of
cockpit
Utilization of Eaton's Remote
Controlled Circuit Breakers
(RCCB) close to the load or
power source will eliminate
much of these long, heavy, and
expensive wire/cable. Control
of the RCCB requires only one
#22 AWG control wire from the
flight deck to the RCCB.
DOUBLE THROW
TOGGLE SWITCH
SET
TRIP
RCCB System for Remote
Operation
POSITION
POSITION
Figure 1
To form an RCCB system
enabling remote On/Off opera-
tion from the flight deck, com-
bine the Eaton RCCB with
Indicator Control Unit (ICU)
model #1500-053-05 on pg. 13.
circuit breaker and mounted
adjacent to the load, the power
source, or even the flight deck.
magnet through the armature,
through the left leg of the elec-
tro-magnet and back to the per-
manent magnet.
Weight reduction, directly from
wire use and indirectly from
(generator) line heat loss, and
installation and maintenance
cost reductions becomes sig-
nificant.
Single Pole RCCB
When the coil T1 -T2 is ener-
gized, the flux generated is
such that it "flows" through the
permanent magnet in the same
direction as the flux gener-
Motor Operation
Single Wire from Flight
Deck
Control of the RCCB requires
only one #22 AWG control wire
from the ICU on the flight deck
to the RCCB.
Figure 1 depicts a simplified
presentation of the RCCB.
The RCCB combines the best
attributes of a circuit breaker
and a relay. The RCCB automati-
cally protects the wires and the
load device during circuit/load
breakdown, but allows flight
deck control of the load during
normal operation.
ated by the permanent magnet
itself. Its path now, however, is
through the right leg of the elec-
tro-magnet. The flux generated
by the electro-magnet increases
in magnitude as power is
applied, and as the flux builds
up in the path through the right
leg of the electro-magnet, the
flux tending to latch the arma-
ture in the left leg of the electro-
magnet becomes very small in
comparison. The armature then
"transfers" and seals at the pole
face of the right leg of the elec-
tro-magnet.
Figure 2 describes the "motor",
which when "energized", will
result in typical armature trans-
fer operation.
Use as a Relay, Circuit
Breaker, or Both
The magnetic circuit utilizes a
permanent magnet as a fulcrum
and latch for the rocking arma-
ture and uses electro-magnets
(coils) at each end of the arma-
ture stroke for transfer purpose.
In the set position (Figure 2),
the flux generated by the per-
manent magnet follows a patch
from the top of the permanent
Combines the best attributes
of a circuit breaker and a relay.
Automatically protects the
wires and the load device dur-
ing circuit/load breakdown, but
allows the flight deck control of
the load during normal opera-
tion.
Operation
The RCCB is basically a relay
and a circuit breaker and allows
the utilization of each identity
singularly or in combination,
depending upon the application.
All of the RCCB's capabilities
apply in either application.
It can be employed as a relay
located adjacent to its load and
remotely operated much like
relays are today through control
wiring and a switching device in
the flight deck.
S
N
B
TRIP
(OPEN)
COIL
SET
(CLOSED)
COIL
A
T1 T2
S1
S2
PERMANENT MAGNET
It can also be utilized as a
Figure 2
16
EATON CORPORATION Aerospace TF300-9 January 2005
Remote Controlled Circuit Breaker (RCCB) — Design Concept
LOAD-L1
K
LOAD-L2
The cutthroat contact B in series
with coil T1 -T2 is opened by
mechanical actuation due to
the armature movement. In
Figure 2, a "dotted extension"
of the armature represents
the mechanical actuator of the
cutthroat contacts. In actual
design, this is accomplished
more conveniently through only
one armature extension and
an appropriate actuator which
drives both contacts B and A.
If a relay is to use power, it
must be available. In some
of the present day and future
vehicles, power remains an
expensive commodity, and
elimination of coil power
BI-METAL
J
E-PIVOT
STATIONARY
CONTACTS
MOVEABLE
CONTACT
BRIDGE
N
G-PIVOT
H-LATCH
L-LEVER
D
I
drawing (10-35 watts) in
LATCH
BAR
C
power devices can add up
especially when vehicles
sophistication requires use of
a significant number of these
devices. Also, it must be
M
ARMATURE
SET
(CLOSED)
COIL
TRIP
(OPEN)
COIL
B
S
N
A
T2
remembered that power uti-
lized by relay coils generate
heat which must be dissipat-
ed. The necessary elimination
of this heat, in turn, requires
the use of additional energy
from the main power source.
4. As indicated, the cutthroat
contacts are opened by the
armature mechanically during
the last several thousandths
of an inch travel of armature
movement. Note: In actual
RCCB, the cutthroat contacts
function is replaced by elec-
tronic control of coil on time.
T1
U1
U2
V1
V1
S2
BUCKING
COIL
BUCKING
COIL
S1
The opening of contact B occurs
in the last several thousandths
of an inch travel of the armature
movement. After coil opening,
the armature movement contin-
ues (until it seats i.e. seals), due
in some degree to the inertia of
the armature, but mostly due to
the magneto-motive force of the
permanent magnet in conjunc-
tion with the decreasing air gap
at the right pole face.
PERMANENT MAGNET
Figure 3
LOAD-L2
BI-METAL
LOAD-L1
J
E-PIVOT
STATIONARY
CONTACTS
K
N
G-PIVOT
H-LATCH
C
I
MOVEABLE
CONTACT
BRIDGE
LATCH
BAR
L-LEVER
M
The device now is again in a
stable position, but the armature
has transferred and the follow-
ing conditions exist:
ARMATURE
D
RCCB Operation As A Relay
SET
(CLOSED)
COIL
TRIP
(OPEN)
COIL
To examine the RCCB operation
as a relay, refer to Figure 3 and
4. The device is shown in the
set position in Figure 3 and in
the tripped position in Figure
4. The circuit path is from L2,
through the bimetal to one of
the stationary contacts. L1 is
connected directly to the other
stationary contact.
S
N
B
A
T2
Contact A is closed and contact
B is open, and the armature
is sealed and latched at the
right leg of the electro-magnet.
To transfer the armature to its
original position, energizing the
coil S1-S 2 allows the process
described above to occur in the
opposite direction.
T1
V1
V1
U1
S2
BUCKING
COIL
BUCKING
COIL
U2
S1
PERMANENT MAGNET
Figure 4
LOAD-L2
BI-METAL
J
LINE-L1
There are a number of advan-
tages to this design approach of
the "motor."
The movable bridge closes the
circuit by bridging between the
two stationary contacts.
E-PIVOT
H-LATCH
N
STATIONARY
CONTACTS
K
G-PIVOT
I
1. The coils open upon transfer
of the armature; hence, the
actual "on time" or duty cycle
approximately equals the
operate time of the relay.
Accordingly, the coil can be
driven hard without fear of
burnout. The "hot coil" with
the low timer constant
As can be seen, movement of
the armature about its fulcrum
will determine the position of
the contacts. When coil S1-S
2 has been energized such
that the armature seals on the
left-hand pole face (Figure 3),
the mechanical linkage system
closes the contacts. Conversely,
when coil T1-T 2 has been ener-
gized, such that the armature
seals on the right-hand pole face
(Figure 4), the relay contacts
will open due to the spring
forces exerted by compression
spring K.
M
L-LEVER
MOVEABLE
CONTACT
BRIDGE
LATCH
BAR
D
ARMATURE
SET
(CLOSED)
COIL
S
N
TRIP
(OPEN)
COIL
B
A
results, in turn, in fast oper-
ate times.
S1
T2
T1
S2
PERMANENT MAGNET
2. Using intermittent duty coils
(smaller coils with less cop-
per) results in less weight
and smaller sizes.
3. Power is conserved. This
is important for two reasons.
Figure 5
Note: there is an "upward force" directed on the lever L through the linkage
tying into the armature at point D. During operation as a relay, point C (interface
between lever L and latch bar I) is "fixed" in place, and the lever L actually rotates
about point C when moving the contact structure from the opening to the closed,
and from the closed to the open position.
EATON CORPORATION Aerospace TF300-9 January 2005
17
Remote Controlled Circuit Breaker (RCCB) — Design Concept
Note that the coil U1-U2 is con-
nected in parallel with T1-T2. It
is wound on the left-hand core
of the electro-magnet such that
when energized along with T1-
C to latch bar I, will rotate latch
bar I counter-clockwise around
its pivot point G. This allows the
main lever L to rotate clockwise
around point D (where it is
ØB
1Ø AC
T2, the force it generates will be engaged with the armature) due
in a direction opposing the latch-
ing force generated in that core
by the permanent magnet.
to the "contact return" spring
(compression spring) force K
acting upon the moveable con-
tact bridge.
2.5 MILLISECONDS
The utilization of a permanent
magnet and intermittent duty
coils, in conjunction with cut-
throat contacts, allows a consid-
erable reduction in copper and
iron from that normally required
in electro-magnets for continu-
ous duty operation.
Note that when this overload
occurs, the armature is not
transferred to the "off" (tripped)
position, but instead remains
in the latched position normally
associated with the "on" (set)
position of the device.
1.0 RECTIFIED AC
1.25 MILLISECONDS OFF TIME
To "reset" the device after the
fault or overload clears could be
readily accomplished by energiz-
ing the "trip" coil (T1-T2) through
a toggle or push-button switch
(see Figure 1) located in the
flight deck. The armature would
then transfer and seal on the
right-hand core of the electro-
magnet, which is the "open"
position shown in Figure 4. At
that time, springs M and N (ten-
sion springs) would reposition
latch bar I and latch H to the
position shown in Figure 4, pro-
viding that the bimetal has now
cooled sufficiently and returned
to its original position as shown
in Figure 4. At this stage, the
RCCB is still in an "open posi-
tion" i.e. (the contacts are open),
but as outlined above, the fault
or overload has been cleared
through action and operation
of the device through bimetal-
lic activity, i.e. "Circuit Breaker"
operation.
ØB
ØC
RCCB Operation as a
Circuit Breaker
To examine the operation of
the device as a breaker, refer to
Figures 3, 4, and 5.
2Ø AC
In Figure 3, the device is shown
in the closed contact position
(presumably) carrying rated cur-
rent. Should an overload occur,
currents greater than rated cur-
rents now "flow" through the
device "entering" through L2,
passing through the bimetal,
through the connection of
the bimetal to one stationary
contact, through the bridging
moveable contact structure, to
the other stationary contact, and
"out" through L1.
2Ø RECTIFIED AC
APPROXIMATELY
0.4 MILLISECONDS OFF TIME
Figure 6
Depending upon the size of the
overload, the bimetal will begin
to deflect as shown in Figure
5 until the actuating end of the
bimetal engages latch H at point
J.
To re-close the contacts, it is
now only necessary to energize
coils S1-S2 and re-establish a
mechanism position similar to
that shown in Figure 3. If the
fault of overload condition is still
in existence, the device would
again trip through bimetallic
activity as just described.
Motion and force due to the
deflection of the bimetal moves
latch H such that it rotates in
a counter-clockwise direction
around its pivot point E.
When latch H has moved an
adequate distance, the upward
force of lever L, applied at point
18
EATON CORPORATION Aerospace TF300-9 January 2005
Remote Controlled Circuit Breaker (RCCB) — Design Concept
phases. The "off" time between
current pulses during coil ener-
gization is approximately 0.4
milliseconds. In comparison, the
"off" time for single-phase power
is approximately 1.25 millisec-
onds. See Figure 6.
the single pole devices.
would be utilized by the logic
circuit. Should AC power be lost,
the DC connection would auto-
matically take over the control
function.
Three Pole RCCB
The difference is the addition
of a power junction area in the
electronics. (see Figure 7).
The design principles employed
in the 3-pole RCCB have fol-
lowed many of the same paths
utilized in the 1-pole RCCB.
Differences other than the
obvious, such as size, weight,
shape, etc., are explained below.
The 3-pole RCCB is designed for
use in 3-phase circuits and is a
400 Hz AC load controller. The
power junction is designed to
use AC power only. DC operate
(coil) power may be used even
though AC loads are to be con-
trolled. This connection is made
at terminal 4 of the IWTS con-
nector. In Figure 7, two sepa-
rate power junctions are shown:
one for AC and one for DC. In
the event both AC and DC are
connected to the RCCB, only AC
The other differences between
1-phase and 3-phase control
circuitry, i.e. timer addition, is
directly related as described in
the above Motor Operation sec-
tion.
The timing circuit establishes
a coil "on" time longer than the
actual transfer time of the arma-
ture. The operation of the 3-pole
RCCB is identical to the 1-pole.
Motor Operation
The principles of motor opera-
tion and construction of the
three pole devices are similar
to those employed in the single
pole RCCB. In the 3-pole device,
the AC operating power is
Control Circuit
Refer to Figure 7. There is one
minor difference in operating
principles and parameters from
drawn from two of the three
ØB
EMERGENCY
LINE POWER
(BACK-UP)
POWER
28Vdc
115 V 400 Hz
ØC
*
POWER
JUNCTION
DC
TRIP COIL
Set Coil
LOGIC
POWER
SUPPLY
TRIP
SWITCH
(FET)
SET
SWITCH
(FET)
LOGIC
TIMER
1/CU
(1/2 AMP C.B.)
Figure 7
*Indicates In 3 Phase Electronics
EATON CORPORATION Aerospace TF300-9 January 2005
19
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