Harmonic Sinusoidal - Term of the Fourier series expansion of a periodic function. The harmonic (or harmonic component) of the nth order is characterized by - Yn is the rms value of the given harmonic component, w is the angular frequency of the fundamental, related to frequency by - w = 2_f; phin is the phase angle of the given harmonic component at t = 0.
Electrolyte - The medium which provides the ion transport mechanism between the positive and negative electrodes of a cell.
Frequency Variation - A change in frequency of more than 3 Hz.
Rectifier/charger - UPS component that draws on the mains the power required to supply the inverter and to float charge or recharge the battery. The alternating input current is rectified and then distributed to the inverter and the battery.
Wall-less Design - A battery design where the structural support for the cells is formed by an open plastic framework.
Circuit breaker (battery) - DC circuit breaker that protects the battery of a UPS.(back)
Percent load - Ratio between the power Pu drawn by the load and the rated output Pn of a UPS system (Pu/Pn). Sometimes referred to as the load factor.
