Grounding - HBM Genesis GEN5i User Manual

GEN5i
2.3

Grounding

The instrument must be used with a protective ground connected via the
conductor of the supply cable. This is connected to the instrument before the
line and neutral connections when the supply connection is made. If the final
connection to the supply is made elsewhere, ensure that the ground connection
is made before line and neutral.
WARNING
Any interruption of the ground connection inside or outside is likely to
make the instrument dangerous. Intentional interruption is prohibited.
For protection against electric shock, all external circuits or equipment shall
have a safe insulation. Therefore it is not permitted to connect peripheral
equipment to the system with a power supply without SELV (Separated Extra
Low Voltage) rating unless explicitly mentioned.
Signal connections to the instrument should be connected after the ground is
made and disconnected before the ground connection is removed, i.e. the
supply lead must be connected whenever signal leads are connected.
WARNING
For safety, it is essential that the protective ground connector of the
instrument is used, whenever voltages greater than 33 V RMS, 46.7 V
PEAK or 70 V DC (IEC 61010-1:2010) are connected. This is to prevent the
instrument's case becoming live in the event of a protective ground
interruption, which could occur if the supply connector is accidentally
disconnected from the instrument.
The primary purpose of protective grounding is to provide adequate protection
against electric shock causing possible death or injury to personnel while
working on de-energized equipment. This is accomplished by grounding and
bonding, to limit the body contact or exposure to voltages at the work-site to a
safe value, if the equipment were to be accidentally energized from any source
of hazardous energy. The greatest source of hazardous energy in most cases
is direct energizing of the equipment from a power-system or source.
20 I2679-4.0 en