Siemens 7VE51, Инструкция по эксплуатации

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-AINTENANCE AND FAULT TRACING 6%
6
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-AINTENANCE AND FAULT TRACING
3IEMENS DIGITAL PROTECTION AND AUTOMATION DEVICES
ARE DESIGNED TO REQUIRE NO SPECIAL MAINTENANCE !LL
MEASUREMENT AND SIGNAL PROCESSING CIRCUITS ARE FUL
LY SOLID STATE AND THEREFORE COMPLETELY MAINTENANCE
FREE /UTPUT RELAYS ARE PROVIDED WITH PROTECTIVE COV
ERS
!S THE DEVICE IS ALMOST COMPLETELY SELF MONITORED
FROM THE MEASURING INPUTS TO THE COMMAND OUTPUT
RELAYS HARDWARE AND SOFTWARE FAULTS ARE AUTOMATI
CALLY ANNUNCIATED 4HIS ENSURES THE HIGH AVAILABILITY
OF THE DEVICE AND ALLOWS A MORE CORRECTIVE RATHER
THAN PREVENTIVE MAINTENANCE STRATEGY 4ESTS AT SHORT
INTERVALS BECOME THEREFORE SUPERFLUOUS
7ITH DETECTED HARDWARE FAULTS THE RELAY BLOCKS ITSELF
DROP OFF OF THE AVAILABILITY RELAY SIGNALS EQUIPMENT
FAULT )F THERE IS A FAULT DETECTED IN THE EXTERNAL MEA
SURING CIRCUITS GENERALLY AN ALARM IS GIVEN ONLY
2ECOGNIZED SOFTWARE FAULTS CAUSE THE PROCESSOR TO
RESET AND RESTART )F SUCH A FAULT IS NOT ELIMINATED BY
RESTARTING FURTHER RESTARTS ARE INITIATED )F THE FAULT IS
STILL PRESENT AFTER THREE RESTART ATTEMPTS THE PROTEC
TIVE SYSTEM WILL SWITCH ITSELF OUT OF SERVICE AND INDI
CATE THIS CONDITION BY THE RED ,%$ "LOCKED ON THE
FRONT PLATE $ROP OFF OF THE AVAILABILITY RELAY SIGNALS
EQUIPMENT FAULT
4HE REACTION TO DEFECTS AND INDICATIONS GIVEN BY THE
RELAY CAN BE INDIVIDUALLY AND IN CHRONOLOGICAL SE
QUENCE READ OFF AS OPERATIONAL ANNUNCIATIONS UNDER
THE ADDRESS FOR DEFECT DIAGNOSIS REFER TO 3EC
TION
%NSURE THAT THE CONNECTION MODULES ARE NOT
DAMAGED WHEN REMOVING OR INSERTING THE
DEVICE MODULES
7ARNING
2OUTINE CHECKS
2OUTINE CHECKS OF CHARACTERISTICS OR PICK UP VALUES
ARE NOT NECESSARY AS THEY FORM PART OF THE CONTINU
OUSLY SUPERVISED FIRMWARE PROGRAMS 4HE PLANNED
MAINTENANCE INTERVALS FOR CHECKING AND MAINTE
NANCE OF THE PLANT CAN BE USED TO PERFORM OPERATION
AL TESTING OF THE EQUIPMENT 4HE FOLLOWING PROCEDURE
IS RECOMMENDED
2EAD OUT OF OPERATIONAL VALUES ADDRESS BLOCK
AND COMPARISON WITH THE ACTUAL VALUES FOR
CHECKING THE ANALOG INTERFACES
&AULT TRACING
)F THE PARALLELING DEVICE CANNOT BE STARTED OR A PARAL
LELING PROCEDURE IN PROGRESS IS ABORTED BY THE DE
VICE 3ECTION WILL GIVE YOU A SURVEY OF THE PROB
ABLE CAUSES
)F THE DEVICE INDICATES A DEFECT THE FOLLOWING PROCE
DURE IS SUGGESTED
)F NONE OF THE ,%$S ON THE FRONT PLATE OF THE MODULE IS
ON THEN CHECK
(AVE THE MODULES BEEN PROPERLY PUSHED IN AND
LOCKED
)S THE /./&& SWITCH ON THE FRONT PLATE IN THE /.
POSITION ‡
)S THE AUXILIARY VOLTAGE AVAILABLE WITH THE CORRECT
POLARITY AND OF ADEQUATE MAGNITUDE CONNECTED
TO THE CORRECT TERMINALS 'ENERAL DIAGRAMS IN !P
PENDIX !
(AS THE MINI FUSE IN THE POWER SUPPLY SECTION
BLOWN SEE &IGURE )F APPROPRIATE REPLACE THE
FUSE ACCORDING TO 3ECTION
)F THE RED FAULT INDICATOR "LOCKED ON THE FRONT IS ON
AND THE GREEN READY ,%$ REMAINS DARK THE DEVICE
HAS RECOGNIZED AN INTERNAL FAULT 2E INITIALIZATION OF
THE SYSTEM COULD BE TRIED BY SWITCHING THE DC AUXIL
IARY VOLTAGE OFF AND ON AGAIN 4HIS HOWEVER RESULTS
IN LOSS OF FAULT DATA AND MESSAGES AND IF A PARAME
TERIZING PROCESS HAS NOT YET BEEN COMPLETED THE
LAST PARAMETERS ARE NOT STORED