Views
6 months ago

5100512174-03

Operation 3 Interpreting

Operation 3 Interpreting and resetting pre-alarms and alarms Introduction As already seen, the relay implements two insulation monitoring thresholds, one corresponding to a pre-alarm and the other to an alarm. Pre-alarms The pre-alarm threshold "I pre-al." corresponds to an earth leakage level that must be eliminated before it becomes dangerous for the installation. DB124944 t l I %(I al.) max I pre-al. t pre-al. (s) I alarm "on" = trip t alarm (s) "off" = no trip Test Reset pre-al. alarm 1 2 3 4 5 6 7 8 9 10 11 12 Modif mA A pre-al. alarm 1 2 3 4 5 6 7 8 9 10 11 12 The signal appears if: b the measured earth leakage current is greater than the set pre-alarm threshold "I pre-al." on at least one channel for a period of time longer than the set prealarm trip delay "t pre-al. (s)" b an "on" test is run by the operator. The consequences are as follows: b the pre-alarm "I pre-al." relay is actuated and the dry output contact closes (terminals 1-2 of connector A). b display Symptoms Pre-alarm condition on a single channel End of pre-alarm condition on a single channel Pre-alarm conditions on a number of channels End of all pre-alarm conditions on all channels Pre-alarm (Pre-alarm LED flashing) b corresponding channel number flashes b value of current displayed continuously b normal display restored → event not stored b corresponding channel numbers flash b "– – –" displayed continuously b normal display restored → event not stored 5100512174-03 Released for Manufacturing Printed on 2013/01/09 61/69

t l Operation Alarms The alarm threshold "I alarm" corresponds to an earth leakage current that is dangerous for the installation. The signal appears if: b the measured earth leakage current is greater than the set fault threshold "I alarm" on at least one channel for a period of time greater than the set delay "t alarm (s)" b an "on" test is run by the operator b a break in the toroid link is detected b the connection with the RM12T selector is defective. The consequences are as follows: b the alarm and pre-alarm relays are actuated (except in the event of a break in the toroid link in which case only the alarm relay is actuated), the dry output contact changes position (terminals 3, 4, and 5 of connector A). 5100512174-03 DB124945 b display Symptoms I %(I al.) max I pre-al. t pre-al. (s) I alarm t alarm (s) Alarm condition on a single channel End of alarm condition on a single channel Alarm conditions on a number of channels End of all alarm conditions on all channels Test Reset pre-al. alarm 1 2 3 4 5 6 7 8 9 10 11 "on" = trip "off" = no trip 12 A Modif mA pre-al. alarm 1 2 3 4 5 6 7 8 9 10 11 Alarm (alarm LED lit continuously) b corresponding channel number lit continuously b value of current displayed continuously b corresponding channel number lit continuously b value of maximum current flashes to indicate end of alarm condition b corresponding channel numbers lit continuously b "– – –" displayed continuously b corresponding channel numbers lit continuously b "– – –" displayed continuously When alarm conditions occur on a number of channels, check the channels one by one ( ) → indications are the same as described above for an "alarm on a single channel".To reset the device, press "rSt" twice. Released for Manufacturing Printed on 2013/01/09 12 62/69

feineadressen_berlinpotsdam_2015-03
NEWS 03
Minimalistic 03
benchmark_26-03-2014_insurance_banking_construction_government
03-schneider-electric
roadshow_am_ntct_assuring_user_experienct_2012-03 - NetScout
03-22-17_AR_16
benchmark_10-03-2014_insurance_banking_construction_government