MIL-HDBK-704-7 270 VDC Power Interrupt
One of the test procedures called out by MIL-HDBK-704-7, “Guidance for Test Procedures for Demonstration of Utilization Equipment Compliance to Aircraft Electrical Power Characteristics, 270 VDC,” is the Power Interrupt Test, Method HDC201. This test procedure is used to verify that 270 volt DC power utilization equipment operates and maintains specified performance when subjected to power interrupts.
To conduct this test, the appropriate input voltage (nominal, low, or high) is first applied to the equipment, the equipment is verified to ensure that it meets performance specifications. Next, the power is turned off for 50 ms and then restored, after which the equipment is tested again to ensure that it meets performance specifications. EA’s line of DC power supplies with auto-ranging capability can meet these demanding requirements. EA offers DC power supplies that can supply up to 15 kW, with very low EMC emissions and galvanically isolated USB, Ethernet/LAN or GPIB interfaces to meet the requirements for automated avionics testing.