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64 Planning the electrical installation
Using a safety switch between the converter and
generator
To minimize the emission level when safety switches are installed in the generator cable
between the converter and the generator:
•
Install the equipment in a metal enclosure in a way that the conduit or generator cable
shielding runs consistently without breaks from the converter to the generator.
Using a contactor between the converter and generator
(F269)
Note:
Select this option selected if you use the wind turbine converter with a permanent
magnet generator.
If you install a contactor between the converter and generator:
•
install the contactor inside a metal enclosure
•
keep the shield and any protective ground (PE) conductors continuous (connect the
incoming and outgoing shields / PE conductors)
•
when the DTC generator control mode is in use: make sure that it is not possible to
open the contactor while the converter is in operation. The contactor may be opened
only after a stop command is given to the generator-side converter. Otherwise the
contactor may be damaged.
Protecting the contacts of relay outputs
Inductive loads (such as relays, contactors and generators) cause voltage transients when
switched off.
The relay contacts of the control board are protected with varistors (250 V) against
overvoltage peaks. In spite of this, it is highly recommended to equip inductive loads with
noise attenuating circuits (varistors, RC filters [AC] or diodes [DC]) in order to minimize the
EMC emission at switch-off. If not suppressed, the disturbances may connect capacitively
or inductively to other conductors in the control cable and form a risk of malfunction in
other parts of the system.
Summary of Contents for ACS880-87CC
Page 4: ......
Page 10: ...10 ...
Page 17: ...Safety instructions 17 1 3 2 4 5 6 7 ...
Page 18: ...18 Safety instructions 8 9 ...
Page 28: ...28 Introduction to the manual ...
Page 52: ...52 Mechanical installation ...
Page 66: ...66 Planning the electrical installation ...
Page 74: ...74 Electrical installation Diagrams for the customer connections are presented below ...
Page 75: ...Electrical installation 75 optional Fast shutdown ...
Page 85: ...Maintenance 85 b c a Air flow direction 2 3 4 6 ...
Page 87: ...Maintenance 87 2 5 4 ...
Page 88: ...88 Maintenance 7 Arrow indicating the air flow direction 5 6 6 ...
Page 90: ...90 Maintenance Air flow circulation b a ...
Page 106: ...106 Maintenance ...
Page 124: ...124 Control units of the converter ...
Page 126: ...126 Dimension drawings ...
Page 127: ...Dimension drawings 127 ...
Page 128: ...128 Dimension drawings ...
Page 142: ...142 Cooling and heating ...