3M PROTECTA AE521 Manual De Instrucciones página 19

1.0 APPLICATIONS
1.1 PURPOSE: Energy Absorbing Lanyards are designed to be a component in a personal fall arrest system (PFAS). They can dissipate fall
energy, limit fall forces transferred to the body, or be used for work positioning and restraint, depending on their type.
Figure 1 identifies the Lanyard models covered by this instruction manual. They may be used in most situations where a
combination of worker mobility and fall protection is required (i.e. inspection work, general construction, maintenance work,
oil production, confined space work, etc.).
1.2 STANDARDS: Your Lanyard conforms to the national or regional standard(s) identified on the front cover of these
instructions. Refer to the local requirements governing occupational safety for additional information regarding Personal Fall
Protection. If this product is resold outside the original country of destination, the re-seller must provide these instructions
in the language of the country in which the product will be used.
1.3 TRAINING: This equipment is intended to be used by persons trained in its correct application and use. It is the
responsibility of the user to assure they are familiar with these instructions and are trained in the correct care and use
of this equipment. Users must also be aware of the operating characteristics, application limits, and the consequences of
improper use.
1.4 REQUIREMENTS: Always consider the following limitations when installing or using this equipment:
• Capacity: Lanyards are for use by one person with a combined weight (clothing, tools, etc.) meeting the Weight
Range specified in Figure 1 for the Lanyard model. Make sure all of the components in the system are rated to a
capacity appropriate to the needed application.
• Anchorage: Anchorages selected for fall arrest systems must be capable of sustaining static loads applied in the
directions permitted by the entire system of at least:
1. 12 kN for metal anchors or 18 kN for textile anchors or
2. Two times the maximum arresting force for certified anchorages.
If permitted based on the anchor type, when more than one fall arrest system is attached to an anchorage, the
strengths set forth in (1) and (2) above shall be multiplied by the number of systems attached to the anchorage.
• Free Fall: When there is no slack, the Lanyard will limit Free Fall Distance to 0 cm (0 ft.). Free Fall Distance
changes with lanyard slack and orientation of the Harness Connection Point to the Anchorage Connection Point
(see Figure 2):
If the Harness Connection Point is below the Anchorage Connection Point (Figure 2A): FF = L
If the Harness Connection Point is above the Anchorage Connection Point (Figure 2B): FF = L
FF Free Fall Distance
HD
Vertical Distance from the Harness Connection Point to the Anchorage Connection Point.
A
L Length of the Lanyard
y
;
Do not lengthen lanyards: Do not lengthen Lanyards by connecting a lanyard, energy absorber, or similar
component without consulting 3M.
• Swing Falls: Swing Falls occur when the anchorage point is not directly above the point where a fall occurs. The
force of striking an object in a swing fall may cause serious injury (see Figure 3). Minimize swing falls by working
as directly below the anchorage point as possible.
• Fall Clearance: Figure 4 illustrates calculation of the required clearance below the Lanyard System Anchorage.
Required clearance will vary with the amount of deployment of the Energy Absorber.
To calculate Fall Clearance (C
C
a
MASD
L
y
1,75 m (5,74 ft)
X
H
1,5 m (5 ft)
1 m (3,28 ft)
• Hazards: Use of this equipment in areas where surrounding hazards exist may require additional precautions to reduce the
possibility of injury to the user or damage to the equipment. Hazards may include, but are not limited to: high heat, caustic
chemicals, corrosive environments, high voltage power lines, explosive or toxic gases, moving machinery, or overhead
materials that may fall and contact the user or fall arrest system. Avoid working where your Lanyard may cross or tangle with
that of another worker. Avoid working where an object may fall and strike the Lanyard, risking loss of balance or damage to
the Lanyard. Do not allow the Lanyard to pass under the arms or between the legs.
): C = MASD + L + 1,75 m (5,74 ft) + X
a y
a
Clearance Below the Anchorage
Maximum Anchorage System Deflection
Maximum Amount of Energy Absorber Deployment
Estimated Harness Stretch
Distance from Dorsal D-Ring to feet
19
+ 1,5 m (5 ft) + 1 m (3,28 ft)
H
Lanyard Length
Clear Margin
- HD
y A
+ HD
y A