ABB ACS880-77CC, Hardware Manual

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6. Install temporary grounding as required by the local regulations.
7. Ask the person in control of the electrical installation work for a permit to work.
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Additional instructions and notes
WARNING!
Obey these instructions. If you ignore them, injury or death, or damage to the
equipment can occur.
• If you are not a qualified electrical professional, do not do installation or
maintenance work.
• We do not recommend that you secure the cabinet by arc welding. If you have
to, obey the instructions in the converter hardware manual.
• Do not do insulation or voltage withstand tests on the converter or converter
modules.
• Control boards of the converter unit may be at the main circuit potential.
Dangerous voltages can be present between the control boards and the frame
of the converter unit when the main circuit voltage is on. It is critical that the
measuring instruments, such as an oscilloscope, are used with caution and
safety always as a priority. The fault tracing instructions give special mention
of cases in which measurements may be performed on the control boards,
also indicating the measuring method to be used.
Note:
• The generator cable terminals on the converter are at a dangerously high
voltage when the converter is connected to the grid, regardless of whether
the generator is running or not.
• The converter DC bus carries a dangerous voltage (over 500 V) when the
converter is connected to the grid or when the generator shaft is rotating.
• External wiring can supply dangerous voltages to the terminals of relay outputs.
WARNING!
Use a grounding wristband when you handle printed circuit boards. Do not touch
the boards unnecessarily. The boards contain components sensitive to electrostatic
discharge.
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Fiber optic cables
WARNING!
Obey these instructions. If you ignore them, equipment malfunction and damage
to the fiber optic cables can occur.
• Handle the fiber optic cables with care.
• When you unplug the cables, always hold the connector, not the cable itself.
• Do not touch the ends of the fibers with bare hands as the ends are extremely
sensitive to dirt.
• Do not bend the fiber optic cables too tightly. The minimum allowed bend
radius is 35 mm (1.4 in).
Safety instructions 15