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Safety instructions 13
Electrical safety in installation, start-up and
maintenance
Precautions before electrical work
These instructions are for the qualified electricians who do work on the converter,
generator cable or generator.
WARNING!
Perform the electrical safety precautions below before starting any
work on the installation. If you ignore the precautions, physical injury or death, or
damage to the equipment can occur. If you are not a qualified electrician, do not
proceed or do any installation or maintenance work.
1. Clearly identify the work location.
2. Disconnect all possible voltage sources.
•
Open the main circuit breaker (Q1), disconnect, lock and attach a warning notice
to it. See section
Opening and disconnecting the main circuit breaker
on page
.
•
Open the charging circuit switch-disconnector (Q10). See section
the charging circuit from the main circuit
on page
.
•
Open and lock out the auxiliary voltage switch-disconnectors (Q2 and Q3). See
section
Disconnecting the external auxiliary power supply
•
Disconnect any external dangerous voltages from the control circuits (such as
relay outputs).
•
Open, disconnect and lock out the breaker of the grid transformer as the main
circuit breaker of the converter does not remove the voltage from the grid cable
busbars and some auxiliary circuits. Attach a warning notice to the disconnector.
•
Lock the turbine rotor (and generator shaft).
•
Open the safety switch between the generator-side converter and the generator (if
any).
•
After you disconnect the converter, always wait for five minutes to let the
intermediate circuit capacitors discharge before you continue.
3. Protect any other energized parts in the work location against contact.
4. Take special precautions when close to bare conductors.
5. Measure that the installation is de-energized.
•
Use a multimeter with an impedance of at least 1 Mohm.
•
Make sure that the voltage between the converter grid cable terminals (L1, L2, L3)
and the grounding (PE) busbar is close to 0 V.
•
Make sure that the voltage between the generator cable terminals (U2, V2, W2)
and the grounding (PE) busbar is close to 0 V.
•
Make sure that the voltage between the DC bus and the grounding (PE) busbar is
close to 0 V.
Note:
•
Only authorized persons are allowed to repair a malfunctioning converter.
Summary of Contents for ACS880-87LC-4000A/4021A-7
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 ...