KROHNE BM 100A ATEX EN - Manual (Page 8)

Section 2 - Installation / Section 3 - Electrical installation
BM 100 A ATEX 10/2001
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In accordance with current installation standards for hazardous locations (e.g. EN 60079-14 / VDE
0165), assembly and installation may only be carried out by specialist personnel who have
received training in explosion protection.
The notes given in the standard Installation and Operating Instructions and in these
Supplementary Instructions and the EC Type Test Certificate (see Attachment A.2) shall be
observed without fail.
2.1 Probes
The various probe types shall be installed such that they cannot come into contact with the tank
wall, and that, in consideration of internals and flow conditions in the tank, buckling or breakage of
the probes can be ruled out with sufficient certainty.
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3.1 Terminal compartment
Connection to power and I/O functions is effected in the terminal compartment of the signal
converter. The terminal compartment can be constructed in ignition protection categories EEx e,
EEx d, EEx ei and EEx di:
Type of protection EEx e or EEx ei
Only parts certified to EN 50 019 are permitted as cable entries and blanking plugs. The cable
clamping area for the supplied cable entries measures 8.5 - 16 mm for the outside cable diameter.
If a shielded cable is used, the outside diameter of the inside insulator must be between 6 and
12 mm. Use only cables with the appropriate diameter or approved cable entries with matching
clamping area in accordance with their test certificate.
Type of protection EEx d or EEx di
•
Direct entry of the connecting cables by way of flameproof cable glands into the flameproof
terminal compartment requires a separate test certificate in conformity with EN 50 018 for the
flameproof glands.
•
Direct entry of the connecting cables by way of conduits into the flameproof terminal
compartment requires, after the flameproof cable conduit has been screwed in, a flameproof
joint in accordance with ISO 965 / DIN 13 with a minimum of 5 full turns depth of engagement.
A suitable mechanical stopping box shall be provided within 450 mm of the entry into the
terminal compartment. Installation of the conduit must be carried out as specified in its
separate test certificate. As a rule, an EN 50018 certified adapter is required between the ´PG`
thread (heavy-gauge conduit thread) of the terminal compartment and the conduit thread.