Perfect Harmony GENIII/e User’s Manual Safety Precautions and Warnings
A1A19000405A: Version 1.3 iii
Perfect Harmony drives are designed with considerable thought to personal safety. However, as with any piece of
high power equipment, there are numerous internal connections that present potentially lethal voltages. In addition,
some internal components are thermally hot to the touch. Follow the warnings below when working in or near the
Perfect Harmony system.
Safety Precautions and Warnings
Danger - Electrical Hazards!
• Always follow the proper lock-out/tag-out procedures before beginning any maintenance or trouble-
shooting work on the drive.
• Always follow standard safety precautions and local codes during installation of external wiring. Pro-
tective separation must be kept between extra low voltage (ELV) wiring and any other wiring as spec-
ified in IEC61800-5-1.
• Always work with one hand, wear insulated or rubber safety shoes, and wear safety glasses. 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 off the input disconnect will remove all voltage from internal compo-
nents. Voltage is still present on the terminals of the input disconnect. Also, there may be voltages
present that are applied from other external sources.
• Never touch anything within the Perfect Harmony 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 run the drive with cabinet doors open. The only exception is the control cabinet which contains
extra low voltages (ELV).
• Never connect any grounded (i.e., non-isolated) meters or oscilloscopes to the Perfect Harmony sys-
tem.
• Never connect or disconnect any meters, wiring, or printed circuit boards while the drive is energized.
• Never defeat the instrument’s grounding.
• Only qualified individuals should install, operate, troubleshoot, and maintain this drive. A qualified
individual is “one familiar with the construction and operation of the equipment and the hazards
involved.”
• Hazardous voltages may still exist within the Perfect Harmony cabinets even when the disconnect
switch is open (off) and the supply power is shut off.
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