power-inputlisted

# DO-160 Power Input (avionics/do160/power-input) Use when the task is DO-160 Section 16 power input characteristics of airborne equipment: checking steady-state AC and DC voltage limits (normal and emergency), quantifying voltage-sag depth and voltage-surge height as percentages of nominal, verifying frequency-variation tolerance on AC buses, and confirming transient-recovery time after a sag or surge event. The module is data-driven: you supply the applicable limit values and category envelopes from the current revision, and the functions validate inputs, compute derived quantities, and give pass-fail margins. ## Domain quick reference - DO-160G Section 16 (power input) covers the electrical input characteristics of equipment connected to aircraft power: steady-state normal and emergency voltage limits, voltage sag and surge transients (assessed against the equipment category), frequency variation for AC buses, and recovery behavior after transients. - Sag depth as percent of nominal: (V_nom - V_sag) / V_nom x 100. Worked: nominal 28.0 V, sag trough 21.0 V -> 25.0 percent. - Surge height as percent of nominal: (V_surge - V_nom) / V_nom x 100. Worked: nominal 28.0 V, surge peak 32.2 V -> 15.0 percent. - Frequency deviation: dev_hz = f_meas - f_nom, and percent of nominal. Worked: 412.0 Hz against 400.0 Hz -> 12.0 Hz, 3.0 percent. A 5.0 percent tolerance band is 380.0 to 420.0 Hz: 412.0 Hz passes, 422.0 Hz fails. - Steady-state limits check: 27.5 V inside