Emerson Control Techniques Epsilon Eb-202, Installation Manual, Page: 24 / 134

9
Safety Considerations
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 the Epsilon 205, 3
minutes for Epsilon 202/203 and 30 seconds for E Series 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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