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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Step 2 : The active AVR will be the reference for voltage and current measurements. The accuracy of its
readings should therefore be checked against any devices present on the customer's premises (instruments
measuring voltage, current, power factor, etc.).
Step 3 : Aligning the voltage measurements
•
Do not apply load to the machine.
•
Check the voltage reading on both AVRs, either with EasyReg Advanced by connecting to both AVRs in
succession, or on the HMI display unit. If the voltage on the "waiting" AVR is incorrect (±1% of the voltage on
the "active" AVR), correct this by changing the primary or secondary values of the generator voltage sensing
transformer (General machine configuration).
Step 4 : Setting the stator current
•
If possible, apply a load representing more than 25% of the generator rated power (this operation can be
done in voltage, power factor or kVAr mode).
•
Check the stator current reading on both AVRs, either with EasyReg Advanced by connecting to both AVRs
in succession, or on the HMI display unit. If the stator current measurement of the "waiting" AVR is incorrect
(±1% of the current on the "active" AVR), correct this by changing the primary or secondary values of the
main stator current transformers and/or isolating transformers (General machine configuration).
Step 5 : Setting the PF
•
With the same load, check the PF measurement on the waiting AVR. If the power factor measurement on the
"waiting" AVR is incorrect (±0.01 compared to that on the "active" AVR), correct this by changing the phase
shift on the parallel operation CT.
Step 6 : Stop the installation.
4. Instructions for use
This plate has been developed to switch automatically from an "active" AVR 1 to an "online" AVR 2, if a fault is
detected on AVR 1. Manual switching is possible, however.
4.1. Safety instructions
Before using the plate for the first time, please refer to the instructions and make sure that operations are
performed in accordance with the safety measures in paragraph 1.4.
4.2. Description of control and signalling devices
The plate does not have any control and signalling devices apart from on the AVR HMI.
4.3. Description of running modes
4.3.1. Manual switching
As previously mentioned, the AVRs can be switched manually with the "Maintenance" input on each AVR.
These inputs depend on the relays on the plate which prevent both AVRs being set to maintenance mode
simultaneously.
The plate therefore has 4 contact inputs:
•
Terminals XC.1 and XC.2: AVR 1 maintenance
•
Terminals XC.2 and XC.3: AVR 1 maintenance reset
•
Terminals XC.4 and XC.5: AVR 2 maintenance
•
Terminals XC.5 and XC.6: AVR 2 maintenance reset