Unidrive M200/201 Control Quick Start Guide
5
Issue Number: 3
1.5 Electric Shock and Fire Hazards
1.5.1 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.
1.5.2 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.
1.5.3 Stored charge
Some products contain capacitors that remain charged to a potentially lethal voltage after the power
supply has been disconnected. It is recommended that the power supply is isolated at least ten
minutes before working on the equipment.
1.6 Electrical installation
1.6.1 Protective Ground (Earth) connection
The ground loop impedance must conform to the requirements of local safety regulations. The
equipment 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.
1.6.2 Fuses
The supply to the equipment 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.
1.6.3 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.
1.6.4 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.
1.6.5 High voltage insulation (flash) testing
High voltage insulation (flash) testing should not be carried out on the equipment.
1.6.6 ELV terminals
The ELV terminals are insulated from the mains supply by a single isolation barrier.
These terminals must be prevented from human contact by an additional isolation barrier, for
example a terminal cover.
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
necessary at all times when working with or adjacent to the equipment. Refer to the
relevant documentation.
WARNING
