
Installing Equipment
38
Safety relevant hints for the installation of the sensing head Polytron
SE Ex HT M
Safety relevant remarks for the cable gland (series A2LF)
Technical Data:
The type designation A3LF stamped on the cable gland contains the figure "3" to
indicate a silicone seal. Only type A3LF is equipped with a white-coloured silicone
seal and thus is suitable to be used in the temperature range –60
o
C to +180
o
C.
The cable gland is only suitable for fixed installations. Cables must be effectively
clamped to prevent pulling or twisting.
The following manufacturer's safety relevant hints concerning cable gland A3LF have
to be considered:
Brief description:
The Peppers cable gland A3LF is suitable for outdoor use in hazardous areas with
unarmed or braided cable, where the braid is to be terminated inside the enclosure.
It seals on the outer jacket and gives environmental protection to IP 68. It is suitable
for normal industrial environments of temperature, humidity and vibration. Material
compatibility under chemical corrosion or attack by aggressive substances must be
considered before installation. Furthermore observe that the O-ring (
1
) is tightly fit-
ted.
Installation of cable:
Prepare the shielded 3-core cable as required. Insert cable through cable gland.
Position cable correctly. The seal must grip the outer jacket of the cable when the
cable gland is tightened. (see picture). Then by means of two spanners (
3
: M24,
2
: M25) tighten (
3
) to (
2
). The correct torque is 25 Nm.
Type:
A3LF / 20S
("3" indicating silicone seal)
Thread:
M 20 x 1.5 (metric)
Material:
brass
Cable sealing range:
7.2 to 11.7 mm
Protection:
IP 68
Manufacturer:
Peppers Cable Glands Ltd.,
Stanhope Road,
Camberley, GU15 3BT, U.K.
Approval:
II 2 GD EEx e II
SIRA 01 ATEX 1272X
Operating temperature range:
–60
o
C to 180
o
C
0032344
7_06_en.eps
Prepare cable as required
1
4
3
2
Содержание SE Ex HT M
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