Ingeteam Ingecon mWind 2.5, Installation Manual

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Differential circuit breaker
Never install in the grid connection for TL units (with no transformer) a differential switch with a limit current below
the maximum fault current which may occur in the wind farm installation under all its operating conditions.
While feeding to the grid, a shunt current is produced from the metallic housings to ground, the value of which
depends on the type of generator as well as atmospheric conditions (rain, snow, etc.).
This service-conditioned shunt current must not exceed the breaking current value of the differential switch. If it does
so, the connection of the inverter to the grid may trip the differential switch external to the inverter.
The unit will need to be started up manually, as the Start/Stop status is conserved even if the inverter has been
switched off.
Section “8. Display control” provides connection details.
5.3.8. Wind generator connection
The inverter is connected to the wind generator by means of quick connect terminals specifically designed for the
purpose. This type of quick connect terminal requires the use of specific tools.
Bear in mind at all times that whenever the wind generator is in movement there will be a voltage at its terminals.
The inverter can therefore have voltages of up to 550 V inside even when not connected to the grid.
The inverter needs a maximum system voltage of 550 V. Check that the wind generator configuration cannot supply
this voltage to the inverter even under the most adverse conditions, e.g. an ambient temperature of -10 °C.
In the case of damage due to the DC voltage exceeding 550 V, Ingeteam accepts no liability for such damage.
Connect the positive pole of the wind generator to the terminal , and the negative pole to
the one marked -.
The inverter’s factory-fitted terminals support a maximum current of 20 amperes.
In units which include an isolating switch, never switch from OFF to ON without first ensuring there
is no DC voltage at the input to the unit.
Whenever the wind generator receives wind, there will be a voltage in the DC cables.
5.4. Electrical disconnection
To disconnect the unit, follow the steps presented in Section “3. Operating, conservation and transport conditions”
of this manual in reverse order.
Take careful note of the following warning:
There are electrical capacitances in the unit which can maintain high voltages even after having
disconnected the inverter from the wind generator and the grid.
Ingecon ® μWind units may only be opened by authorised personnel.
AAY2000IKI04 33
Installation manual Ingeteam Power Technology, S.A.