Temperature Measurement Within Zone 0; Installation; Assembling And Disassembling; Assembling Of Rtd And Tc With Connection Head Agl, Aglh, Aglhd - ABB TSHD Instrucciones De Montaje

2.4 Temperature measurement within zone 0

Use appropriate thermowells or protection tubes for temperature measuring within zone 0.
They must meet following requirements:
Minimum wall thickness
– 1 mm in the case of thermowells respectively protection tubes made of stainless steel (i.e.
according to DIN 17440) or made of non-corrosive nickel alloys (i.e. according to DIN
17742)
– 3 mm in the case of thermowells respectively protection tubes made of other steels
Design
Material and dimensions of thermowells and protection tubes have to be specified to resist
permanently all operating loads with sufficient safety margins (temperature, pressure, flow in-
duced bending stress and vibration, corrosion etc.).
Testing
Thermowells and protection tubes have to be pressure tested with 1,5 times of the nominal
pressure.
3

Installation

Warning
STOP
The general requirements for planning, selection and installation of electrical equipment within
potentially explosive atmospheres have to be observed (i.e. EN 60079-14).
4

Assembling and disassembling

4.1 Assembling of RTD and TC with connection head AGL, AGLH, AGLHD

Thermowells or protection tubes, extension tubes
Indications referring to zone 0 applications:
– Assemble appropriate thermowells or protection tubes for the separation of zones
– Use seals with appropriate temperature, pressure, and corrosion resistance if necessary
Prevent raising of temperature due to heat flow or heat accumulation (i.e. by sufficient dis-
tance to hotter components and thermal insulation, heat dissipation by sufficient air circula-
tion)
Measuring insets
Use only approved ABB measuring insets with appropriate diameter for the corresponding
bore of the connection head (ignition-proof gap).
Exchange inset respectively connection head in case of surface defects in the range of the
ignition-proof gap.
Cable glands
– Use only approved cable glands of the proper protection class.
– Observe certification and installation instructions of the cable glands.
– Screw in cable glands with appropriate thread securer (e.g. Loctite 273, not necessary for
NPT threads, check threads for damages before).
42/10-55 XU Temperature Sensor TSHD (SensyTemp Exd) GB5