Operating Principle - Tractel blocfor 1.8 EVO ESD-EN 360 Manuel D'installation, D'emploi Et D'entretien

• The blocfor™ self-retracting fall-arrester must only
be used for protection of operators against falls when
working at heights.
• The operator must not exceed a 20° working angle
from the vertical of the anchor point (figure 1.c).
• The blocfor™ self-retracting fall-arrester must be
protected against the infiltration of any material inside
the housing (paint, sand, mud, etc.).
• Limitations of use (figure 1).
• The working load of the blocfor™ self-retracting fall-
arrester is 150 kg. By reference to their respective
manuals, you must make sure before use that all the
components of the fall-arrest system are compatible
with this load. If this is not the case, the maximum load
will be that of the fall-arrest system component with
the lowest maximum load.
• Operating temperature: -30°C to +50°C for blocfor™
self-retracting fall-arresters.
blocfor™ EVO ESD self-retracting fall arrester
Blocfor™ EVO ESD self-retracting fall arresters
must not be used in an environment where there
is: risk of sparks being projected, risk of contact of
a flame with the strap of the self-retracting fall
arrester. The melting point of the strap is 140°C.
Extra precautions must be taken in situations where this
temperature could be reached and in particular if the
rope rubs against the edge.
blocfor™ 1.8A EVO ESD and 1.8B EVO ESD
• The blocfor™ 1.8A EVO ESD self-retracting fall-
arrester (figure 5.a) must be secured to an anchor
point, with a resistance (R) of 12 kN or more, using
the connector located at the top of the device. The
M47 connector secured at the end of the energy
absorber of the retractable lanyard must always be
connected to one of the fall-arrest anchor points of
the harness.
Any other combination in use is dangerous and
prohibited.
• The blocfor™ 1.8B EVO ESD self-retracting fall-
arrester (figure 5.b) must be connected using its
M47 connector attached at the end of the energy
absorber to one of the fall-arrest anchor points of the
harness. The connector at the end of the retractable
lanyard must be connected to an anchor point with a
resistance (R) anchor of 12 kN or more.
Any other combination in use is dangerous and
prohibited.
Horizontal use:
blocfor™ automatic fall arrest devices B1.8A & B1.8B
EVO ESD, have been tested for horizontal use
according to the European sheet CNB/P/11.060 of
October 2014 according to type A on 0.5 mm radius
edge minimum. see technical specification table above.
If the operator must deviate more than 1.50 m from the
perpendicular to the anchor point of the blocfor™ self-
retracting fall arrester, it is imperative to use an anchor
that complies with standard EN 795 of type C or D.
If the arrest is considered to be cutting, or if there
is a sharp edge present, take all possible
precautions to avoid a fall and use edge protection
where this isn't possible.
Before using the blocfor™ self-retracting fall-arrester,
check (figures 1.d and 1.f):
– Check that the blocfor™ self-retracting fall-arrester
anchor point is located at the same height or above
the edge.
– Check that the angle formed by the lanyard in
contact with the edge, in the event of a fall, is less
than 90° (figure 1.f bis).
– The distance between the anchor point of the
blocfor™ self-retracting fall-arrester device and
the edge (L min) must conform with the technical
specifications in table above (figure 1.f).
– To reduce the risk of swinging, the movement of
the operator is limited to a maximum distance of
lateral displacement perpendicular to the edge
(Max M) which must conform with the technical
specification table above (figure 1.d). If the
operator has to deviate more than 1.50 m from
the perpendicular of the anchorage point of the
blocfor™ self-retracting fall arrester, it is imperative
to use an anchorage complying with standard EN
795 type C or D.
– That there is no obstacle under the suspension /
swing area in the event of a fall.
– Check that a specific rescue plan has been set up
in the event of a fall.
– That the roofs do not show any possibility of
weakness (fibro-cement, etc.) if in any doubt,
install a solid path of movement compatible with
the roof.
– There are other possible cases that are not included
in this list. There are numerous other possibilities
that we cannot either list or foresee. In the event of
doubt or misunderstanding of this manual please
contact Tractel for further information.
®
Fall factor 2: the self-retracting fall-arrester blocfor™
1.8A and B EVO ESD have been tested with fall factor 2
according to the European sheet CNB/P/11.085 of June
2018 (figure 1.f).

5. Operating principle

blocfor™ self-retracting fall-arrester EVO ESD:
In the event of a fall, the mechanism located inside the
blocfor™ self-retracting fall-arrester instantaneously
locks by means of a ratchet system and the fall
is stopped gently by a tear-type energy absorber
with a stop value of less than 6 kN. When climbing
GB
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