400Hz STATIC INVERTER
 500 VA TSO-C73

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.


Model  SC50

Specifications:
Input Voltage:  28 VDC. (nominal). 20 VDC to 36.5 VDC range.
 Input Current:  20.7 ADC at full load. 0.5 ADC at no load.
 Output Voltage:
  • #1
  • #2
  +5%, -7% (±2% typ. on 115 V).
  • 115 VAC
  • 26 VAC
 Output Power:
  • 115Vac
  • 26Vac
  500 VA total of 115 V & 26 V.
  • 500 VA
  • 100 VA
 Output Frequency:  400 Hz ± 1.0 Hz.
 Phase & Waveform:  Single phase & sinusoidal.
 Harmonic Distortion:  0.7% (nominal), 3% max.
 Power Factor:  +.8 to -.8
 Efficiency:  87% (nominal).
 Regulation:  1% Line, 1% Load, 2.5% Temp.
 Weight:  4.9 lb. (2.22 kg)
 Response Time:  300 Usec (NL to FL)
 Overload Capacity:  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:
  • 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
 Operating Temp:  -55° C to +71° C (-65° F to+160° F)
 Altitude:  55,000ft.
 Environment:  RTCA DO- 160C env. cat. F2ZBB(LV)XXXXXXBXAXXXZXXX
 Cooling:  Thermostatically controlled brushless fan.
 Compliance: 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.

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