SC50
TSO-C73 STATIC INVERTER
400Hz 500 VA
The SC50 is a lightweight, static inverter that utilizes the latest state of the art, solid state circuitry to invert a 28 VDC input to a 115 VAC, 400 Hz sine wave output.
Design features include a crystal controlled oscillator for output frequency stability and a pulse-width-modulated square to sine wave power conversion scheme for efficient and reliable operation.
The SC50 is primarily designed to power airborne and ground instruments, compasses, gyros, radars and navigation equipment.
Specifications
Input Voltage
28 VDC. (nominal). 20 VDC to 36.5 VDC range.
28 VDC. (nominal). 20 VDC to 36.5 VDC range.
Input Current
20.7 ADC at full load. 0.5 ADC at no load.
20.7 ADC at full load. 0.5 ADC at no load.
Output Voltage #1, #2
+5%, -7% (±2% typ. on 115 V).
+5%, -7% (±2% typ. on 115 V).
- 15 VAC
- 26 VAC
Output Power - 15Vac, 26Vac
500 VA total of 115 V & 26 V.
500 VA total of 115 V & 26 V.
- 500 VA
- 100 VA
Output Frequency
400 Hz ± 1.0 Hz.
400 Hz ± 1.0 Hz.
Phase & Waveform
Single phase & sinusoidal.
Single phase & sinusoidal.
Harmonic Distortion
0.7% (nominal), 3% max.
0.7% (nominal), 3% max.
Power Factor
+.8 to -.8
+.8 to -.8
Efficiency
87% (nominal).
87% (nominal).
Regulation
1% Line, 1% Load, 2.5% Temp.
1% Line, 1% Load, 2.5% Temp.
Weight
4.9 lb. (2.22 kg)
4.9 lb. (2.22 kg)
Response Time
300 Usec (NL to FL)
300 Usec (NL to FL)
Overload Capacity
110% of rated output power for 2 hrs 150% of rated output power for 5 min
110% of rated output power for 2 hrs 150% of rated output power for 5 min
Protection Circuits
The inverter will shutdown under the following conditions:
The inverter will shutdown under the following conditions:
- Input Voltage >37.5 VDC ±1.0 VDC
- Input Voltage < 18.0 VDC ±1.5 VDC
- Internal high ambient temperature.
- Output short circuit condition.
Remote On/Off
Yes. Ground Pin E to turn ON
Yes. Ground Pin E to turn ON
Operating Temp
-55° C to +71° C (-65° F to+160° F)
-55° C to +71° C (-65° F to+160° F)
Altitude
55,000ft.
55,000ft.
Environment
RTCA DO- 160C env. cat. F2ZBB(LV)XXXXXXBXAXXXZXXX
RTCA DO- 160C env. cat. F2ZBB(LV)XXXXXXBXAXXXZXXX
Cooling
Thermostatically controlled brushless fan.
Thermostatically controlled brushless fan.
Compliance
FAA TSO-C73
FAA TSO-C73
| PIN NO. | DESCRIPTION |
| A | Input +28 VDC |
| B | Output 115 VAC, 400 Hz |
| C | Output Common |
| D | Input Return, Chassis GND |
| E | Remote On/Off. GND to ON |
| F | N/C |
| G | Output 26 VAC, 400 Hz |
| MATE | MS3106A18-9S or Equiv. |
