Apparatus and method for testing a motor-shorting relay

摘要

An apparatus for monitoring the operational condition of a relay configured for selective short-circuiting of the windings of a motor is disclosed. In an exemplary embodiment of the invention, the apparatus includes a current source connected to a first node in common with a first contact in the relay, and a second node in common with a second contact in the relay. A microprocessor provides an input signal to the current source. The input signal, when applied to the current source, causes the current source to apply a first voltage to the first node and a second voltage to the second node.