A method of centralized identity authentication for use in connection with a communications network includes registering users of the communications network such that each registered user’s identity is uniquely defined and determinable, and registering a plurality of vendors having a presence on the communications network. The rattrapante mechanism has a common trip element for starting and stopping the second rattrapante indicator and the minute rattrapante indicator. The ultra-hard material is polycrystalline in nature and is typically PCD or PcBN. The phase-current instruction-value limiting device is configured to compare the phase current instruction value with the phase current allowable value to limit the phase current instruction value so as not to exceed the phase current allowable value.