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SSPC (Solid State Power Controller)
Aerospace Equipment Works
Engineering Dept.
Power Control Equipment Group
April 21, 2016
What is SSPC ?
2
Load
《Conventional Circuit Breaker》
Power
《 SSPC 》
SSPC
Control Command
Power Load
SSPC(Solid State Power Controller) is switching control unit by solid state but not by circuit breaker
Picture of SSPC 2
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3
SSPC Switching Image
Aircraft
Power supply SSPC
D-sub Connector
Operation
Panel
Load
Equipment
115VAC IN
Overwrite Signal 1
SSPC Status Signal（ON/OFF）
・ON/OFF Signal
・Stop Signal
・ON/OFF
・ON/OFF
SSPC Status Signal (ON/OFF）
Overwrite Signal 2
・Start-up with power input from Aircraft Power supply through D-sub connector. ・Power ON/OFF with input of Overwrite signal 1 from Operation Panel. ・Power ON/OFF with input of Overwrite signal 2 from Load Equipment. ・Power shut-down with Overload detection function ※High design flexibility and wide functional extension with lift control function Ex. Indicating power distribution status and overall power management on operation panel as well as remote controlling are possible.
Copyright（Ｃ）2015-SINFONIA TECHNOLOGY CO., LTD. All Rights Reserved.
Advantage of SSPC
1. Size and Weight
① Volume; less than Half, Weight 30%-50% of C/B size（ref. size image drawing）
② No restriction of casing material. Aluminum is acceptable.
③ Power vs Volume density; SSPC:CB=7:1*, Power vs Weight density; SSPC:CB=5:1*
* According to industry source information
2. Reliability
① Rapid Overload Protection, Quick Short-cut Protection
② Minimum loss switching with controlled starting-up and turning-off
3. Maintenability and Flexibility
① Long life against effect of ark, oxidization, corrosion, welding such as moving parts
② Less effect of performance failure by contact bounce and vibration
③ MTBF is much improved, hence system operation rate is much improved
④ Standardize the hardware and individualize it with software modification
4. Extendability
① Data bus access and networking access is possible as well as real time feedback of load status.
Remote monitoring of status signal (ON/OFF) is possible
Monitoring of over all channel load status is possible.
② High freedom of overwrite signal
Discrete (Switch ON/OFF), and Switching of load equipment
Communication (Input from higher level device）
4
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Spec item SFT (Planned) Other (Example)
SSPC or C/B SSPC C/B
Type name AC SSPC (TBD) Remote Control Circuit Breaker (RCCB)
Type No. (TBD) ----
Ｂａｃｉｓ Ｓｐｅｃ
Voltage Rating Ue AC115V 400Hz AC115V 400Hz
DC28V
Current Rating Range In 10A , 20A （50A is TBD） 5 … 100A
Standard current ratings and typical voltage drop values
5A: 450mV 40A: 250mV
7.5A: 350mV 50A: 250mV
10A: 640mV 6 Channels 10A: 350mV 60A: 250mV
15A: 250mV 70A: 250mV
20A: 1280mV 4 Channels 20A: 250mV 80A: 250mV
25A: 250mV 90A: 250mV
30A: 250mV 100A: 250mV
Ｓｐｐ．Ｓｐｅｃ
Ｏｎｔａｃｔｓ Signal output Aux
Auxiliary contacts change over contacts
S1-S2 is open , when SSPC(SFT) main contact is open
change over contacts S1-S2 is open , when RCCB main
contact is open
Voltage ratings DC28V , AC115V (400Hz) DC28V , AC115V (400Hz)
Current ratings resistive load: 3.0A inductive load: 1.5A lamp load : 0.5A
resistive load: 3.0A inductive load: 1.5A lamp load : 0.5A
＠
AC115V（400Hz） SSPC Development 1. Spec Comparison between SSPC and Circuit Breaker
5
Copyright（Ｃ）2015-SINFONIA TECHNOLOGY CO., LTD. All Rights Reserved.
Item SFT Other
SSPC or C/B SSPC C/B
Type Name AC SSPC (TBD) Electrical Control Unit
①9ch(10ea)Spec
Appearance ・
Dimension ・
Weight
②15ch(17ea)Spec
Appearance ・
Dimension ・
Weight
AC115V（400Hz） SSPC Development ２．Size and Weight Comparison with Circuit Breaker product
230
300
400
300
m = aprx4.5kg
m = aprx11.5kg
(Front)
(Front)
300
（220）
m = aprx3.7 kg (Front)
50
300
（220）
m = aprx7.4 kg (Front)
100
6
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50±0.5 300±1
21
4±
1
Left Side
View
Front View
Flat View
AC115V（400Hz） SSPC Development ３．Appearance Application /
Function
Aircraft Utility Electric Circuit Overload
Protection
Raring Voltage Single Phase (twin) 115VAC (400Hz)
Rating Current
① 10A (1.15kVA)
② 20A (3.3kVA)
Channels 10ch (115VAC）
Overload Protection Level
Rating amp.×1000％ ?sec.
Rating am.p×120％ ?sec.
Cooling method Natural Air Cooling
Weight Approx.3.7㎏
Solid State Power Controller （SSPC）
Main Circuit Connector
(5ch×2SET＝10chMAX)
Status Indicator
Rating Plate
ＰＬ Plate
Metal Case
（Aluminum）
(22
0±
1)
7
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Arc fault protection ~ High Voltage DC Series arc~
Arc fault test stand
Electrode
8
High-voltage DC causes high energy arc in case of series arc.
Arc
DC270V 5A
8
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負荷LOAD
Series arc
9
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Detect of series arc fault • DC Series arc fault can be detected by the method
applying quality engineering technology.
1.E-02
1.E+01
1.E+04
1.E+07
1.E+10
1.E+13
1.E+16
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
Time [sec]
Eva
luat
ion function
High: Arc fault is more likely to occur
No arcing
SSPC Development Plan
• Primary Electric Power Distribution Bus
– High Voltage DC (270V)
– High Current (Target: 300A)
• Improvement of Arc fault detection and protection technology
※2007 (Utility Management Center)
– 230V AC [WF] (~15A)
– 270V DC (~15A)
※2004 (Load Management Center)
– 115V AC [CF] (~15A)
– 28V DC (~15A)
DC-SSPC (270V)
AC-SSPC (230V)
LMC
UMC
10
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DC-SSPC (270V/300A)
