Unigen Plus & Industrial Unigen - User technical documentation
-D page 17/19
6.2. Power plant start-up/Commissionning
Caution: before starting the generating sets, please read the following part.
This is a standard commissioning for a simple power plant. If you use only this procedure, it can't engage our
responsibility.
Before commissioning (before going on site)
Check of schematics
How?
• Be sure you have the latest power plant schematics.
Why?
• To be sure the wires will be present on site (Can bus connector, shielded wires...).
What?
• 0 Volt wiring.
• Shields.
• Speed governor / UNIGEN Interface.
• Automatic Voltage Regulator / UNIGEN Interface (droop current transformer must be removed).
• CAN Bus.
• Paralleled lines.
During commissioning
Start in safe condition
How?
• Generator breaker output locked in open position.
• Disconnect the wires between UNIGEN (terminals 17/18) and the speed governor.
• Disconnect the wires between UNIGEN (terminals 20/21) and the AVR.
• Ask the technician who had wired the power plant to lock the generator breaker open.
• Battery negative of each UNIGEN power supply (terminal 2) must be connected to each other Unigen
and to the 0V of the speed governor.
• Disconnect the wires of the relay ‘SYNC OK’ (terminals 34/35) of the Unigen.
Why?
• To be sure not to drive a false paralleling during the beginning of commissioning.
Switches configuration
How?
• Put switches in OFF/ON position before start the engine, see chapter 3 ‘Settings’ for more details.
Why?
• To configured several important functions of the Unigen.
Interface UNIGEN / Speed governor
Interface UNIGEN / Auto Voltage Regulator
How?
• Start the engine.
• Adjust the nominal speed and voltage, for example 50,00Hz & 400VAC, on the speed/voltage
regulator. If a trim pot is present on the AVR, adjust it to get +/-8% (see AVR manufacturer doc).
• Stop the engine.
• Remove the cover of the Unigen if necessary.
• Connect only the ref wire (terminal 18) to the speed governor “speed ref output”.
Speed setting :
• Start the engine.
• Adjust Speed gain RV10 full CCW on the UNIGEN.
• Measure the voltage between Ref and remote voltage input on speed regulator side.
• Adjust UNIGEN output voltage (terminals 17/18) adjusting the offset RV9 to have the same voltage
than measurement of previous point.
• Connect the control wire (terminal 17).
• Close the ‘SYNC IN’ input (terminal 3 to 0 Volts). UNIGEN is trying to synchronize on a dead bus
(00.00Hz).
• Adjust the speed gain RV10 to have 48,00Hz.
• Open the ‘SYNC IN’ input.
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