Videotec ULISSE COMPACT User Manual
Page 9
Instruc
tions manual - English - EN
9
MNVCUCZ_1351_EN
• Connect the device to a power source
corresponding to the indications given on the
marking label. Before proceeding with installation
make sure that the power line is properly isolated.
The supply voltage should never exceed the limit
(+/-10%).
• The device should be mounted so that it is
accessible only to the technician/installer because
the moving parts constitute a residual risk of injury
caused by movement of said parts.
• Attach the Dangerous Moving Parts label near the
device. (Fig. 1, page 12).
• The appliance should only be considered switched
off when the power supply has been disconnected
and the connecting cables to other devices have
been removed.
• A disconnecting device, readily and easily
accessible, must be incorporated in the electrical
system of the building for rapid intervention.
• Use a Class 2 listed UL tranformer, compliant with
the Standards in force, only for products marked
UL, powered at 24Vac.
• Installation category (also called Overvoltage
Category) specifies the level of mains voltage
surges that the equipment will be subjected to.
The category depends upon the location of the
equipment, and on any external surge protection
provided. Equipment in an industrial environment,
directly connected to major feeders/short branch
circuits, is subjected to Installation Category III. If
this is the case, a reduction to Installation Category
II is required. This can be achieved by use of an
insulating transformer with an earthed screen
between primary and secondary, or by fitting
listed Surge Protective Devices (SPDs) from live
to neutral and from neutral to earth. Listed SPDs
shall be designed for repeated limiting of transient
voltage surges, suitable rated for operating voltage
and designated as follows: Type 2 (Permanently
connected SPDs intended for installation on the
load side of the service equipment overcurrent
device); Nominal Discharge Current (In) 20kA min.
For example: FERRAZ SHAWMUT, STT2240SPG-CN,
STT2BL240SPG-CN rated 120/240Vac, (In=20kA).
Maximum distance between installation and
reduction is 5m.