Safety Requirements On The Electrical Installation; Installation Guidelines For Lightning Protection - Xylem YSI DIQ/S 182-XT-4-PR Operation Manual

Installation
3 - 6
(example UV/VIS sensor).
3.2

Safety requirements on the electrical installation

Electrical equipment (e.g. motors, contactors, cables, lines, relays)
must meet the following requirements:
 Conformity with national regulations (e.g. NEC, VDE and IEC)
 Suitability for the electrical conditions at the installation site
– Maximum operating voltage
– Maximum operating current
 Suitability for the environmental conditions at the installation site
– Temperature resistance (minimum and maximum temperature)
– Stability against UV light when used outdoors
– Protection against water and dust (Nema or IP protection class).
 Suitable fusing of the electrical circuit
– Overcurrent fuses (in accordance with the technical data of the
device input or output)
– Overvoltage class II surge limiters
 Suitable disconnecting device (e. g. switch or circuit breaker) for the
mains supply of permanently mounted equipment with separate
mains connection
– in compliance with the following regulations
- IEC 60947-1
- IEC 60947-3
– in the vicinity of the equipment (recommendation)
 Flame-resistant (cables and lines),
in compliance with the following regulations
– UL 2556 VW-1 (for USA, Canada)
– IEC 60332-1-2 (outside of USA, Canada)
3.3

Installation guidelines for lightning protection

When using the IQ S
areas, adequate protection against (electrical) surges must be
provided. A surge is a summation phenomenon of surge voltage and
surge current. It is generated through the indirect effect of a lightning
event or switching operation in the mains, in the grounding system and
in information technology lines.
To be adequately protected against the damaging effects of surges, an
N instrumentation, particularly in outdoor
ENSOR ET
System 182-XT-4
ba76027e02 12/2014