ABB Relion 670 series, Installation And Commissioning Manual

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Section 2 Safety information
About this chapter
This chapter contains safety information. Warning signs are presented which urge
the user to be careful during certain operations in order to avoid injuries to humans
or damage to equipment.
2.1 Warning signs
Strictly follow the company and country safety regulations.
Working in a high voltage environment requires serious approach
to avoid human injuries and damage to equipment.
Do not touch circuitry during operation. Potentially lethal voltages
and currents are present.
Always avoid touching the circuitry when covers are removed. The
product contains electronic circuits which can be damaged if
exposed to static electricity (ESD). Lethal high voltage circuits are
also exposed when covers are removed.
Always use suitable isolated test pins when measuring signals in
open circuitry. Potentially lethal voltages and currents are present.
Never connect or disconnect a wire and/or a connector to or from a
IED during normal operation. Hazardous voltages and currents are
present that may be lethal. Operation may be disrupted and IED and
measuring circuitry may be damaged.
Always connect the IED to protective earth, regardless of the
operating conditions. This also applies to special occasions such as
bench testing, demonstrations and off-site configuration. Operating
the IED without proper earthing may damage both IED and
measuring circuitry and may cause injuries in case of an accident.
1MRK 502 029-UEN A
Section 2
Safety information
15
Installation and commissioning manual