Repairs; Electric Shock And Fire Hazards; Electrical Installation - Control Techniques Nidec SI-EtherCAT User Manual

1.5

Repairs

Users must not attempt to repair a drive if it is faulty. It must be returned to the supplier of the drive.
1.6

Electric Shock and Fire Hazards

WARNING - Dangerous voltage
Where products are supplied by or connected to mains voltages, the voltages used can
cause severe electrical shock and/or burns, and could be lethal. Extreme care is
WARNING
necessary at all times when working with or adjacent to the equipment. Refer to the
relevant documentation.
1.6.1 AC supply
The AC supply must be isolated before any servicing work is performed, other than adjustments to
the settings or parameters specified in the manual.
1.6.2 Live terminals
Some types of signal and control lines carry hazardous voltages (120/ 240 V) and can cause
severe electric shock and may be lethal.
1.6.3 Isolation device
The AC supply must be removed from the drive using an approved isolation device before any
servicing work is performed, other than adjustments to the settings or parameters specified in the
manual.
1.6.4 Stored charge
The drive contains capacitors that remain charged to a potentially lethal voltage after the power
supply has been disconnected. If the drive has been energized, the power supply must be isolated
at least ten minutes before work may continue.
1.7

Electrical installation

1.7.1 Protective Ground (Earth) connection
The ground loop impedance must conform to the requirements of local safety regulations. The drive
must be grounded by a connection capable of carrying the prospective fault current until the
protective device (fuse or circuit breaker) disconnects the supply. The ground connections must be
inspected and tested at appropriate intervals.
1.7.2 Fuses
The supply to the drive must be installed with suitable protection against overload and short-
circuits. The tables in the relevant documentation show recommended fuse ratings. Failure to
observe these installation instructions could result in fire.
1.7.3 Cables
The cable sizes in the relevant documentation are only a guide. The mounting and grouping of
cables affects their current-carrying capacity, in some cases smaller cables may be acceptable but
in other cases a larger cable is required to avoid excessive temperature or voltage drop. Refer to
local wiring regulations for the correct size of cables. Failure to observe these installation
instructions could result in fire.
1.7.4 Terminal connections and torque settings
Loose power connections can be a fire risk. Always ensure that terminals are tightened to the
specified torques. Refer to the tables in the relevant documentation.
SI-EtherCAT User Guide
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