STEST

LDC102 VOLTAGE STEADY STATE LIMITS TEST

Aircraft Electric Power Characteristics

LDC102 Voltage Steady State Limits Test

The MIL-STD-704 Aircraft Electric Power Characteristics standard, prepared by the U.S. Department of Defense, defines electrical requirements for military aircraft and airborne equipment, covering parameters such as voltage, frequency, phase, ripple, and maximum current. The most recent revision is MIL-STD-704F Change 1, published in 2016. In addition to its use by the U.S. military and its contractors, MIL-STD-704 is widely recognized worldwide for assessing the conformity of military aircraft systems and equipment.

Objective Purpose

  • To verify that 28 VDC utilization equipment operates correctly at the Normal Low Steady State (NLSS) and Normal High Steady State (NHSS) limits.

Test Scope Scope

  • Application of voltage at NLSS and NHSS limits for a minimum duration of 30 minutes.

Technical Approach Process

  • The utilization equipment shall maintain performance at the specified steady-state voltage limits, demonstrate recovery (restart) behavior as required, and shall not be damaged.

Typical Applications Use

  • Military aircraft electrical systems and airborne equipment operating on a 28 VDC power architecture.

At our STEST facility in Ankara, accredited by TURKAK, the LDC102 Voltage Steady State Limits Test is performed within the scope of MIL-STD-704 in accordance with TS EN ISO/IEC 17025.

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Nominal Limits 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

EMI/EMC Test Chamber Features

Technical Specification
EMC-1
EMC-2
EMC-3
EMC-4
Unit of Measurement
Width
7000
13000
7250
9000
mm
Length
6000
10000
4000
5500
mm
Height
3850
9000
2850
5000
mm
Door Dimensions
2000×1000
4200×4750
1950×950
2000×2000
mm
Turntable Diameter
-
6000
-
2000
mm
Turntable Load Capacity
-
70
-
2
ton
Reflection
Fully Anechoic
Semi-Anechoic
Semi-Anechoic
Semi-Anechoic
-