Flender MD Connection dimensions Solid shaft w B4CH-18-C Bevel-helical gear unit B4

Flender/Flender Gear Units/Bevel-helical gear unit B4

the Protection Criteria Document exist. Although adequate transformer protection and intertie protection exist to some extent, there is significant deviation from the original esign crite ria. thorough assessment of the current protection system utilized should be performed to ensure that both the City of Vernon system and Malburg Generating Station are adequately protected. This in my opinion, is necessary due to the significant deviatio from the original design basis. Sections 2.1, 2.2, 2.3, and 2.4 provide detailed comparisons of the existing scheme and its deviation from the original design criteria. Page 4 of 1 Malburg Generating Station Generator Protection Setting Review 2.1 Comparison of Lockout Relays , Trip Design , and Relay Inputs to Protection Crit eria Document The Protection Criteria Document References the following lockout relays and functions for MGS #1, #2, and #3 for each unit; 8G, 8BF5G, 8BFN, 8BFS, 9U. None of these lockout relays exist physically in the field. Instead, desired trip ping function for some relays is incorporated into the SEL protective relays. Other functions, such as 8BFN and 8BFS, which were designed to open all north or south bus breakers on the City of Vernon (COV) 6 kV system in the event of breaker failure ituation, are omitted entirely. Table 1, 2, and 3 show the actual tripping functions for each SEL protective relay. Additionally, all SEL -3G tripping functions have been defeated the use of the test switches, see Picture 1, 2, and 3, sho wing open tes switch positions . Lastly, the SEL -3G relay should be capable of sending shutdown signal directly to the Generator Control System. Due to time limitations for the outage window, it was not possible to determine if the shutdown signal actually went to the Alstom Control System. Further investigation will be required at future outage to determine if this functionality exists as designed. Table 1: MGS Unit 1 Trip Result Table