LDC104 Total Surge Test


MIL-STD-704 Aircraft Electrical Power Specifications Standard, prepared by the United States (US) Department of Defense, is a military standard that covers issues such as voltage, frequency, phase, fluctuation and maximum current in a military aircraft and its equipment. The most current version of the standard is MIL-STD-704F_CHG-1, published in 2016. However, this standard is not a standard that only covers the US military and its subcontractors, but is a globally accepted standard for evaluating the suitability of military aircraft and systems. It is converted to the voltage levels required for the operation of the equipment used in the aircraft power system, which comes with a power source that complies with the MIL-STD-704 standard. In order for a piece of equipment to operate in accordance with the MIL-STD-704 standard, it must pass MIL-STD-704 tests to see its effects under difficult conditions and to verify its conformity.

The LDC104 Total Surge Test is performed to verify that 28V DC power handling equipment operates and maintains specified performance when powered within the Normal Low Steady State (NLSS) limits and Normal High Steady State (NHSS) limits. LDC104 Total Surge Test takes a minimum of 30 minutes.

In the LDC104 Total Surge Test, the usage equipment has passed if it operates and maintains performance as specified in the usage equipment performance specification document for normal aircraft electrical conditions when subjected to surge as specified in the applicable version(s) of MIL-STD-704, as specified in the table. acceptable. In the LDC104 Total Surge Test, occupancy equipment must maintain specified performance for a period of time that verifies that the occupancy equipment can operate continuously when subjected to a degraded voltage waveform and shall not be less than thirty (30) minutes. The equipment used in the LDC104 Total Surge Test must not be damaged or cause an unsafe situation.

Normal Limit 704A 704B 704C 704D 704E 704F
Voltage  NLSS 24 Vdc 22 Vdc 22 Vdc 22 Vdc 22 Vdc 22 Vdc
Voltage NHSS 28.5 Vdc 29 Vdc 29 Vdc 29 Vdc 29 Vdc 29 Vdc

Within the scope of our STEST facility located in Ankara, which is an organization accredited by TURKAK, we carry out the LDC104 Total Surge Test in accordance with the MIL-STD-704 Aircraft Electrical Power Specifications standard in accordance with the TS EN ISO/IEC 17025 General Requirements for the Competence of Experiment and Calibration Laboratories Standard.
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EMI/EMC Test Chambers Features



  Test Room 1 Test Room 2 Measurement unit
Width 6850 13000 mm
Size 5900 10000 mm
Height 3800 9000 mm
Door Dimension 1000x2000 4200x4750 mm
Turntable Diameter - 6 m
Turntable Load Carrying Capacity - 70 ton
Reflection Semi Anti-Reflective Semi Anti-Reflective  


  • MIL-STD-704D
  • MIL-STD-704E
  • MIL-STD-704F