Browse wiki
Jump to navigation
Jump to search
The following Part 21 Report was received … The following Part 21 Report was received via facsimile:</br>On December 12, 2013, ABB determined that that its Instruction Leaflet 41-682.11 (effective September 2002) for the subject relays may be deficient with regards to the external diagram connection.</br>With the relay connected per the typical connections shown in the instruction leaflet and the relay having verified a synchronous condition for a period of time ranging from several minutes to hours, the main element contact identified as 'CVX-1' may become stuck in the closed position. Again, this situation is dependent on each customer's control power connection scheme and may be more prevalent in certain applications, such as fast bus transfer or tie breaker applications. In cases where the contact remains closed, it may result in an unwanted connection of two asynchronous systems when the command to connect them is issued, leading to equipment damage and possible bodily injury or death. We will be updating our instruction leaflet in February 2014, to reflect the addition of an interposing contact in the control circuit to prevent this condition.</br>ABB's records indicate that 15 relays were supplied to Exelon (Clinton Nuclear Station), 4 relays were supplied to Duke Energy (Oconee Nuclear Station) and 10 relays were supplied to ABB d.o.o. (Slovenia).</br>ABB has determined, as of the date of this notification, that it does not have the capability to perform an evaluation to determine if a defect exists, and therefore in accordance with 10 CFR 21.2l(b), is making this notification simultaneously to our customers so they may evaluate the deviation or failure to comply, in accordance with 10 CFR 21(a).o comply, in accordance with 10 CFR 21(a). +
22:36:00, 10 February 2014 +
49,813 +
17:36:00, 10 February 2014 +
22:36:00, 10 February 2014 +
The following Part 21 Report was received … The following Part 21 Report was received via facsimile:</br>On December 12, 2013, ABB determined that that its Instruction Leaflet 41-682.11 (effective September 2002) for the subject relays may be deficient with regards to the external diagram connection.</br>With the relay connected per the typical connections shown in the instruction leaflet and the relay having verified a synchronous condition for a period of time ranging from several minutes to hours, the main element contact identified as 'CVX-1' may become stuck in the closed position. Again, this situation is dependent on each customer's control power connection scheme and may be more prevalent in certain applications, such as fast bus transfer or tie breaker applications. In cases where the contact remains closed, it may result in an unwanted connection of two asynchronous systems when the command to connect them is issued, leading to equipment damage and possible bodily injury or death. We will be updating our instruction leaflet in February 2014, to reflect the addition of an interposing contact in the control circuit to prevent this condition.</br>ABB's records indicate that 15 relays were supplied to Exelon (Clinton Nuclear Station), 4 relays were supplied to Duke Energy (Oconee Nuclear Station) and 10 relays were supplied to ABB d.o.o. (Slovenia).</br>ABB has determined, as of the date of this notification, that it does not have the capability to perform an evaluation to determine if a defect exists, and therefore in accordance with 10 CFR 21.2l(b), is making this notification simultaneously to our customers so they may evaluate the deviation or failure to comply, in accordance with 10 CFR 21(a).o comply, in accordance with 10 CFR 21(a). +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
00:00:00, 10 February 2014 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
01:51:45, 2 March 2018 +
17:36:00, 10 February 2014 +
-0.208 d (-5 hours, -0.0298 weeks, -0.00685 months) +
22:36:00, 10 February 2014 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.