Siemens SINAMICS PERFECT HARMONY GH180 - 3.3 Safety Information and Warnings

3.3 Safety Information and Warnings
DANGER
Hazardous Voltage!
• Always follow the proper lock-out/tag-out procedures before beginning any maintenance
or troubleshooting work on the VFD.
• Always follow standard safety precautions and local codes during installation of external
wiring. The installation must follow wiring practices and insulation systems as speci󹪝ed in
IEC 61800-5-1.
• Hazardous voltages may still exist within the VFD cabinets even when the disconnect
switch is open (o󹪜) and the supply power is shut o󹪜.
• Only quali󹪝ed individuals should install, operate, troubleshoot, and maintain this VFD. A
quali󹪝ed individual is "a person, who is familiar with the construction and operation of the
equipment and the hazards involved."
• Always work with one hand, wear electrical safety gloves, wear insulated electrical hazard
rated safety shoes, and safety goggles. Also, always work with another person present.
• Always use extreme caution when handling or measuring components that are inside the
enclosure. Be careful to prevent meter leads from shorting together or from touching other
terminals.
• Use only instrumentation (e.g., meters, oscilloscopes, etc.) intended for high voltage
measurements (that is, isolation is provided inside the instrument, not provided by isolating
the chassis ground of the instrument).
• Never assume that switching o󹪜 the input disconnector will remove all voltage from
internal components. Voltage is still present on the terminals of the input disconnector.
Also, there may be voltages present that are applied from other external sources.
• Never touch anything within the VFD cabinets until verifying that it is neither thermally hot
nor electrically alive.
• Never remove safety shields (marked with a HIGH VOLTAGE sign) or attempt to measure
points beneath the shields.
• Never operate the VFD with cabinet doors open. The only exception is the control cabinet.
• Never connect any grounded (i.e., non-isolated) meters or oscilloscopes to the system.
• Never connect or disconnect any meters, wiring, or printed circuit boards while the VFD is
energized.
• Never defeat the instrument’s grounding.
• When a system is con󹪝gured with VFD bypass switchgear (e.g. contactors between line and
motor, and VFD and motor), these switches should be interlocked so that the line voltage
is never applied to the VFD output if the medium voltage input is removed from the VFD.
• When a system is con󹪝gured with VFD pre-charge, medium voltage is present on the
primary side of the input transformer and upstream device even though the MV contactor
is not closed.
Safety notes
3.3 Safety Information and Warnings
Type 6SR5 Air-Cooled
Operating Instructions, AK, A5E39390112 15