The amp hours describe the available capacity on a lead acid battery. The equation is broken down with the number before the Ah being divided by the hours printed on the battery. This yields the approximate power capacity the battery is able to maintain until it drains its power.
ABB offers. three-phase monitoring relays with selectable phase sequence monitoring. This provides the capability of ignoring phase. sequence conditions for applications, such as motors with forward and reverse rotation, where the phase sequence is. unimportant.
A Relay allows you to: 1  Use one voltage to operate the coil and another voltage to operate the load (machinery). 2  To create automation using one machine to activate a second machine or drop it out. 3  To create large load operations with small voltage control.