Stahl EC-940S Serie Manuel D'instructions page 11

• This device was designed to be permanently
secured and connected on a building or on a
suitable structure. The device must be permanently
secured and connected before any operation.
• Comply with all the national standards during the
device installation.
• A power disconnect device must be included
in the electrical installation, and it must be very
quickly recognizable and operated if needed.
• This is a Class A product. In a domestic
environment this product may cause radio
interference. In this case the user may be required
to take adequate measures.
• 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.
For devices powered at 24Vac the supply voltage
should never exceed the (±10%) limit. For devices
powered 12Vdc and 24Vdc the supply voltage
should never exceed the (±5%) limit.
• In the case of a 24Vac power supply, you must
provide for adequate separation from the AC
power supply line using double or reinforced
insulation between the main power supply line
and the secondary circuit.
• To comply with the main supply voltage dips and
short interruption requirements, use a suitable
Uninterruptable Power Supply (UPS) to power the
unit.
• Make all connections, installation and maintenance
work in a non-explosive atmosphere.
MNTCMVXTHD_1606_EN
• 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 Surge Protective Devices (SPDs) from live to
neutral and from neutral to earth. The SPD devices
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 120Vac/240Vac,
(In=20kA). Maximum distance between installation
and reduction is 5m.
• National deviations for Norway and Sweden:
Equipment connected to the protective earthing
of the building installation through the mains
connection or through other equipment with
a connection to protective earthing (and to a
cable distribution system using coaxial cable)
may in some circumstances create a fire hazard.
Connection to a cable distribution system has
therefore to be provided through a device
providing electrical isolation below a certain
frequency range (galvanic isolator, see EN60728-
11). In Norway, due to regulation for installations
of cable distribution systems, and in Sweden, a
galvanic isolator shall provide electrical insulation
below 5MHz. The insulation shall withstand a
dielectric strength of 1,5kV r.m.s., 50Hz or 60Hz,
for 1 min. Utstyr som er koplet til beskyttelsesjord
via nettplugg og/eller via annet jordtilkoplet
utstyr - og er tilkoplet et kabel-TV nett, kan
forårsake brannfare. For å unngå dette skal det ved
tilkopling av utstyret til kabel-TV nettet installeres
en galvanisk isolator mellom utstyret og kabel-TV
nettet.
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