Emerson Control Techniques EN Series Installation Manual page 15

EN Drive Istallation Manual
voltages used in this unit can cause severe electric shock and/or burns, and could be lethal.
Extreme care is necessary at all times when working with or adjacent to this equipment.
The installation must comply with all relevant safety legislation in the country of use.
AC supply isolation device
The AC supply must be removed from the drive using an approved isolation device or
disconnect before any servicing work is performed, other than adjustments to the settings
or parameters specified in the manual. The drive contains capacitors which remain
charged to a potentially lethal voltage after the supply has been removed. Allow at least
6 minutes for Epsilon 205, 3 minutes for Epsilon 202/203 and 30 seconds for EN drives
after removing the supply before carrying out any work which may involve contact with
electrical connections to the drive.
Products connected by plug and socket
A special hazard may exist where the drive is incorporated into a product which is
connected to the AC supply by a plug and socket. When unplugged, the pins of the plug
may be connected to the drive input, which is only separated from the charge stored in the
bus capacitor by semiconductor devices. To avoid any possibility of electric shock from
the pins, if they are accessible, a means must be provided for automatically disconnecting
the plug from the drive (e.g., a latching contactor).
Grounding (Earthing, equipotential bonding)
The drive must be grounded by a conductor sufficient to carry all possible fault current in
the event of a fault. The ground connections shown in the manual must be followed.
Fuses
Fuses or over-current protection must be provided at the input in accordance with the
instructions in the manual.
Isolation of control circuits
The installer must ensure that the external control circuits are isolated from human
contact by at least one layer of insulation rated for use at the applied AC supply voltage.
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