초록 ▼

An apparatus for detecting and analyzing a fault condition occurring in an engine electrical generator set (21) while providing means for inhibiting the engine electrical generator set (21) upon the occurrence of the fault. The apparatus utilizes a run relay (22) connected in series with single cont

An apparatus for detecting and analyzing a fault condition occurring in an engine electrical generator set (21) while providing means for inhibiting the engine electrical generator set (21) upon the occurrence of the fault. The apparatus utilizes a run relay (22) connected in series with single contact fault senders (26) to a reference potential. The single contact fault senders (26) monitor various parameters of the engine electrical generator set (21). When a parameter is exceeded, the single contact fault sender (26) opens, de-energizing run relay (22) thereby inhibiting engine electrical generator set (21). Optical isolators (27) monitor the single contact fault senders (26) and provide information on their status to logic determining means (24) to alert an operator of an exceeded parameter. Also provided is a bypass switch (31) to bypass single contact fault senders (26).

대표청구항 ▼

A fail safe circuit for monitoring a plurality of parameters of a control process system comprising: (a) inhibit means, cooperatively connected to the control process system and capable of receiving an inhibit signal, for inhibiting the control process system upon receipt of said inhibit signal; (b)

A fail safe circuit for monitoring a plurality of parameters of a control process system comprising: (a) inhibit means, cooperatively connected to the control process system and capable of receiving an inhibit signal, for inhibiting the control process system upon receipt of said inhibit signal; (b) switching means, operatively connected to said inhibit means and control process system for creating an inhibit signal responsive to the status of the parameters of the control process system; and (c) isolation means, connected to said switching means, for electrically isolating said switching means and providing an output drive corresponding to each monitored parameter; and (d) logic determining means, cooperatively connected to said isolation mans whereby said logic determining means are electrically isolated from said switching means, for detecting said inhibit signal and for determining which parameter of the control process system was responsible for said inhibit signal comprising: (i) fault memory means for storing information regarding a fault condition; (ii) data processing means including: (A) means for polling each output drive to determine whether a fault condition has occurred; (B) means for latching a fault condition associated with said output drive; and (C) means for storing the fault condition in said fault memory means.