Installation
System 182-XT-4
3 - 8
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each outside location of the MIQ modules. Sun shields protect the
electric field lines in the area of the MIQ module through an
advantageous development of the electrical field lines in the area of
the MIQ module and promote the dissipation of the surge via the
mounting construction.
6 The mains voltage for supplying the measuring system must comply
with overvoltage category II. Generally this is ensured through the
public operator of the power supply networks. In company-owned
networks, e.g. in all power supply systems owned by wastewater
treatment plants, this must be kept separate by a potential
equalization and a surge protection system for the plant.
7 One part of the IQ S
ENSOR
N
ET
safety and lightning protection
concept is based on high-grade protective insulation of the network
components and of the entire system. It does not have or require
any protective ground (PG) conductor or earth terminal. Avoid any
direct connection of the IQ S
ENSOR
N
ET
connections or the metallic
sensor enclosures with the local grounding or potential equalization
system and with metallic construction elements (see point 9).
8 Additional external lightning protection measures directly on the
IQ S
ENSOR
N
ET
system or its components, e.g. the use of
overvoltage surge arresters, are not necessary for protection
against the indirect effects of lightning and could possibly result in
malfunctions.
9 For the realization of the internal lightning protection of the system
(e.g. wastewater treatment plant control stands) and for the
protection of IQ S
ENSOR
N
ET
external resources, cable entry points
into buildings or distributions coming from the IQ S
ENSOR
N
ET
must
be carried out as follows:
– The shield of SNCIQ or SNCIQ-UG cables can be connected to
the local potential equalization with a gas overvoltage surge
arrester. Shielding terminals (e. g. of the PROFIBUS system)
have to be used to contact the shield. The shield of the cable
must not be opened under any circumstances.
– 0/4-20 mA interfaces must be realized with shielded cables. The
cable shield must be connected directly to the potential
equalization(s) provided. If plant potential equalization systems
are provided on both sides, the shield must also be connected on
both sides. The inner conductors must have no contact with the
potential equalization.
– The PROFIBUS cables have to be installed according to the rules
of the relevant bus system.
– Relay lines should be connected to the local potential
equalization in order to provide general and consistent protection
via gas overvoltage surge arresters.
Summary of Contents for YSI 182-XT-4
Page 6: ...Contents System 182 XT 4 0 4 ba76027e02 12 2014...
Page 10: ...Overview System 182 XT 4 1 4 ba76027e02 12 2014...
Page 14: ...Safety System 182 XT 4 2 4 ba76027e02 12 2014...
Page 64: ...Installation System 182 XT 4 3 50 ba76027e02 12 2014...
Page 82: ...Operation System 182 XT 4 4 18 ba76027e02 12 2014...
Page 88: ...The SETTINGS menu System 182 XT 4 5 6 ba76027e02 12 2014...
Page 114: ...Relay outputs System 182 XT 4 6 26 ba76027e02 12 2014...
Page 116: ...Maintenance and cleaning System 182 XT 4 7 2 ba76027e02 12 2014...
Page 122: ...What to do if System 182 XT 4 8 6 ba76027e02 12 2014...
Page 134: ...Technical data System 182 XT 4 9 12 ba76027e02 12 2014...
Page 135: ...System 182 XT 4 1 ba76027e02 12 2014...
Page 138: ...Accessories and options System 182 XT 4 11 2 ba76027e02 12 2014...
Page 142: ...Appendix store separately if required System 182 XT 4 13 2 ba76027e02 12 2014...
Page 143: ......
