Nidec Leroy-Somer D700, Руководство по установке и обслуживанию

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Electric Power Generation Installation and maintenance 5747 en - 2018.10 / a
Dual plate D700
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4.3.5. Procedure for replacing a faulty AVR
If one of the AVRs is faulty, the AVR concerned must be replaced. This change can be made (while
observing the safety conditions), even while the installation is running, by performing the steps below:
Step 1 : Isolating the AVR
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Open the power disconnect terminals
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Open the generator and mains voltage measurement disconnect terminals
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Switch off the 24 VDC power supply which supplies the AVR control circuit
Step 2 : Dismantling the AVR
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Remove the AVR connectors
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Disconnect the earth wiring
Step 3: Physically removing the faulty AVR
Step 4
: Installing the spare AVR
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Make sure that the AVR is firmly fixed on the plate
Step 5 : Electrical connections
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Wire up the earth connection
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Wire up the connectors, in strict compliance with the plate wiring diagram
CAUTION: Reversing the wiring can seriously damage the generator and the AVR.
Step 6 : Supplying the AVR with power
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Power up the 24 VDC power supply for the AVR control circuit
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Check the AVR operation
Step 7 : Loading the AVR configuration with the saved configuration (or if it is not available, using the
configuration of the second AVR).
Step 8 : Closing the disconnect terminals
Step 9 : Checks
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Set the AVR to "maintenance" mode
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Check that the voltage and current measurements are in the same range. If this is not the case, please
refer to section 3.4. Aligning measurements.
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Reset "maintenance" mode on the AVR concerned
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Check that the AVR reacts OK to the change of "maintenance" mode to "online" on the home page
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Save the configuration of the AVR that has been replaced