ABB Relion 620 Series, Руководство по установке

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Safety Information
Dangerous voltages can occur on the connectors, even though the auxiliary
voltage has been disconnected.
Non-conformance to instructions may result in substantial property
damage, personal injury, and/or death.
Electrical installation is to be performed only by authorized personnel.
National and local electrical safety regulations must always be followed.
The frame of the IED has to be carefully grounded.
When the plug-in unit has been detached from the case, do not touch the
inside of the case. The IED case internals may contain high voltage
potential and touching these may cause personal injury.
The IED contains components which are sensitive to electrostatic
discharge. Unnecessary touching of electronic components must therefore
be avoided.
Whenever changes are made in the IED, measures should be taken to avoid
inadvertent tripping.