EN 81-21:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.REVWRMHþLKVWDYEDKSicherheitsregeln für die Konstruktion und den Einbau von Aufzügen - Aufzüge für den Personen- und Gütertransport - Teil 21: Neue Personen- und Lastenaufzüge in bestehenden GebäudenRègles de sécurité pour la construction et l'installation des élévateurs - Elévateur pour le transport de personnes et d'objets - Partie 21 : Ascenseurs et ascenseurs de charge neufs dans les bâtiments existantsSafety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing builiding91.140.90Lifts. EscalatorsICS:Ta slovenski standard je istoveten z:EN 81-21:2009SIST EN 81-21:2009en,fr,de01-december-2009SIST EN 81-21:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 81-21September 2009ICS 91.140.90 English VersionSafety rules for the construction and installation of lifts - Lifts forthe transport of persons and goods - Part 21: New passengerand goods passenger lifts in existing buildingRègles de sécurité pour la construction et l'installation desélévateurs - Elévateurs pour le transport de personnes etd'objets - Partie 21 : Ascenseurs de personnes etascenseurs de charge neufs dans les bâtiments existantsSicherheitsregeln für die Konstruktion und den Einbau vonAufzügen - Aufzüge für den Personen- und Gütertransport -Teil 21: Neue Personen- und Lastenaufzüge inbestehenden GebäudenThis European Standard was approved by CEN on 16 July 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 81-21:2009: ESIST EN 81-21:2009

List of the electric safety devices . 27Annex B (informative)
Periodical examinations and tests, examinations and tests after an important modification or after an accident . 28B.1Periodical examinations and tests . 28B.2Examinations and tests after an important modification or after an accident . 28Annex C (normative)
Examination of pre-triggered stopping system . 29C.1General provisions . 29C.2Statement and test samples . 29C.3Laboratory tests . 30C.3.1Method of test . 30C.3.2Determination of the nominal braking force of the stopping gear . 30C.3.3Checking after the tests . 30C.4Calculation . 31C.4.1Calculation method. 31C.4.2Site test case . 31C.4.3Worst cases . 31Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 95/16/EC . 33Bibliography . 34 SIST EN 81-21:2009

The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this document. Where one or several requirements in EN 81-1 or EN 81-2, and their amendments A1:2005 and A2:2004, cannot be fulfilled, due to reasons such as the constraints of the structure of the existing building, the corresponding requirements in this European Standard apply. According to section 2.2 of Annex I to the Lifts Directive, the application of alternative measures to prevent the risk of crushing above and underneath the lift car is restricted to installations where the requirement for free space or refuge is impossible to fulfil and may be subject to prior approval by national authorities. The main concern dealt with in this standard is the reduction of top and pit clearances that may be required due to site conditions. The adopted principle of safety is based on two levels of achievement: first by means of an electrical stopping of the lift car, then by means of a mechanical stopping of the lift car. When drafting this standard, it has been considered for reduced overhead and pit the following: a) Risk reduction measures that rely solely on operations in compliance with procedures are considered as not acceptable, except in a few situations in which mistake-proof solutions are not available (e.g. some activities in repair and installation in which safety devices cannot be operational); b) The risk reduction measures shall be automatically (without any intervention) activated, or may be manually activated if mistake-proof-by-design, or a combination of both is used. SIST EN 81-21:2009

EN 81-1:1998 and EN 81-2:1998 and the following apply. 3.1 existing building building, which is used or was already used before the order for the lift was placed NOTE A building whose internal structure is completely renewed is considered as a new building. 3.2 movable stop mechanical device that under normal operation allows the free movement of the lift between normal terminal stops NOTE Where a person enters on the car roof or in the pit, the device limits the travel of the car to ensure sufficient safety space in the headroom or in the pit. 3.3 triggering device device for operating a stopping gear by a mechanical linkage when the lift car passes a predetermined position in the well NOTE This device is actuated when a door/trap door giving access to the lift well is open by means of a key. 3.4 stopping gear mechanical device for stopping, and maintaining stationary the lift car in the case of unintended movement of the lift car above and/or below a predetermined position in the well to protect person(s) on the car roof and/or in the pit 3.5 pre-triggered stopping system system including the triggering device, the mechanical stopping gear and a mechanical linkage in between NOTE Under normal operation of the lift the system allows the free movement of the lift between normal terminal stops. Where a person enters on the car roof or in the pit the system ensures sufficient safety space in the headroom or in the pit SIST EN 81-21:2009

4 List of significant hazards This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt with in this standard, identified by risk assessment as significant for this type of machinery and which require action to eliminate or reduce the risk (See Table 1). Table 1 — List of significant hazards No Hazards as listed in Annex A of EN ISO 14121-1 Relevant clauses
Mechanical hazards due to: - Machine parts or work pieces, e.g.: - Accumulation of energy inside the machinery, e.g.: .
Crushing hazard 5.5, 5.7 Shearing hazard 5.1 a), 5.3.1 Entanglement hazard 5.4 a) Drawing-in or trapping hazard 5.5.3, 5.7.3 Impact hazard 5.2, 5.3.2, 5.4 b), 5.9, 5.10, 5.11, 5.12, 5.13, 5.14 Slip, trip and fall of persons (related to machinery) 5.1 b), 5.3.1, 5.8 - Uncontrolled amplitude of movements 5.2, 5.3.2 - From insufficient mechanical strength of parts 5.4 b), 5.5.2.2.2 d), 5.6.2 a), 5.7.2.2.3 d), 5.8.1 c) - From inadequate design of pulleys, drums 5.4 b) - Falling of person from person carrier 5.4 c), 5.6, 5.8 a) 2), 5.8 b) 2) 8
Hazards generated by neglecting ergonomic principles in machinery design as, e.g. hazards from:
Access 5.3.1 d), 5.4 c), 5.9, 5.10, 5.11, 5.12, 5.13, 5.14 Inadequate local lighting 5.3.1 h), 5.3.1 i) Unhealthy postures 5.5 Human error, human behaviour 5.5.4, 5.7.4, 7.2 From abnormal conditions of assembly / testing / use / maintenance 5.3, 5.5, 5.6, 5.7, 5.8 9
Hazards associated with the environment in which the machine is used
Failure of the power supply 5.5.2.4.1, 5.5.3.1, 5.5.3.2.2, 5.7.2.4.1, 5.7.3.1, 5.7.3.2.2 Failure of the control circuit 5.5, 5.7 Unexpected start-up, unexpected overrun / overspeed
(or any similar malfunction) from;
- Restoration of energy supply after an interruption 5.5.4, 5.7.4
The requirements of EN 81-1:1998 and EN 81-2, 10.2 are supplemented as follows: When travelling in a separate well, the counterweight or the balancing weight may be guided by ropes or by the shape of the counterweight or the balancing weight and its well enclosure. If the counterweight or balancing weight is resting on its buffers it shall be kept in a substantially upright position by the use of a small distance to the well enclosure or an emergency guiding. Provisions shall be made so as to avoid the counterweight or the balancing weight to rotate, e.g. by using equal number of left and right twisted suspension ropes. Where its shape guides the counterweight or balancing weight, the enclosure of the well shall be continuous and flush without any protrusion from which the counterweight or the balancing weight can be blocked. The well enclosure shall be covered by durable material. In case of ropes as guiding elements a minimum number of 4 ropes shall be used. Springs or weights shall tighten the ropes. The horizontal free distance between the counterweight or the balancing weight and the well enclosure shall be at least 50 mm if the enclosure of the well is continuous and flush otherwise it shall be increased by 2 mm for each meter of distance between the fixations of the ropes. 5.4 Pulleys in the well The requirements of EN 81-1:1998/A2:2004 and EN 81-2/A2:2004, 6.7.2 may be replaced by the following: Diverter pulleys may be installed in the headroom of the well within the projection of the car roof provided that: a) The diverter pulleys shall be protected according to EN 81-1:1998, 9.7 or EN 81-2, 9.4; b) Retaining devices shall prevent diverter pulleys from falling in the event of a mechanical failure of the pulley, shaft or bearings. The devices shall be able to support the weight of the pulley and the suspended loads; c) Examinations and tests and maintenance operations can be carried out in complete safety from the car roof, from inside the car, from a platform or from outside of the well; d) Clearances in the headroom shall comply with EN 81-1:1998 or EN 81-2, 5.7 or the requirements of 5.5. SIST EN 81-21:2009

EN 81-1:1998, Annex K does not apply. The requirements of EN 81-1:1998, 5.7.1.1 b), c) and d), EN 81-1:1998, 5.7.2.2 and EN 81-2, 5.7.1.1 b), c) and d) may be replaced by the following: 5.5.1 General The lift shall be equipped with devices providing safety spaces in the headroom (5.5.2) and a safety system (5.5.3) controlling the operation of the lift. 5.5.2 Devices providing safety spaces in the headroom The devices providing safety spaces in the headroom shall be: a) Either movable stops; or b) A pre-triggered stopping system. 5.5.2.1 Movable stops Automatically operated movable stops shall be designed to prevent damage due to any collision when they are moved between the fully retracted and extended position. 5.5.2.1.1 Arrangement 5.5.2.1.1.1 In the case of traction drive lifts the movable stops shall be installed under the counterweight to mechanically stop the car. 5.5.2.1.1.2 In the case of positive drive lifts the movable stops shall be installed above the car to mechanically stop the car. 5.5.2.1.1.3 In the case of hydraulic lifts the movable stops shall consist of one or more devices external to the jack situated outside of the car projection, the resultant force of which is exerted on the centre line of the jack. 5.5.2.1.2 Buffering of movable stops 5.5.2.1.2.1 In the case of traction and positive drive lifts the movable stops shall be fitted with buffers complying with EN 81-1:1998, 10.3 and 10.4. 5.5.2.1.2.2 In the case of hydraulic lifts the design of the movable stops shall be such that the average retardation of the car does not exceed 1 gn and that in case of an indirect acting lift the retardation does not result in slack rope or chain. 5.5.2.2 Pre-triggered stopping system The pre-triggered stopping system shall include a triggering device with its actuation means for tripping a mechanical stopping gear by a linkage when the car reaches a fixed tripping point in the up direction. 5.5.2.2.1 The triggering device shall be easily accessible so that examinations and maintenance operations can be carried out in complete safety from the pit, or from the car roof or from outside of the well. 5.5.2.2.2 The pre-triggered stopping system shall comply with the following: a) The stopping gear shall be fixed on the car and act on the guide rails of the car; SIST EN 81-21:2009

C.
For hydraulic lifts the upward speed vm shall be used for calculation of the term 0,035 v². 5.5.2.4 Operation The movable stops or the triggering device shall be operated: a) Automatically at the latest when the safety system (5.5.3) has been activated; or b) Manually. 5.5.2.4.1 In the case of power failure: a) The automatic movable stops or the automatic triggering device shall be activated and maintained in the active position at least up to the power restoration; b) For manually operated movable stops or for manually operated triggering devices, a mechanical safety device shall maintain the car stationary. This device shall be activated and maintained in the active position at least up to the power restoration. 5.5.2.4.2 For traction drive lifts, in the case of manual operation of moveable stops or automatic triggering device, the mechanical safety device according to 5.5.2.4.1 b) shall be operated by the safety system (5.5.3), in order to prevent any movement of the car in the up direction if the movable stops or the triggering device is not in the active position.
1) The improvement of the refuge space from 1,0 m (EN 81-1/2) to 1,20 m is possible due to the arrangement of the mechanical devices providing safety spaces and does not require an alteration of the existing building. SIST EN 81-21:2009

a) activate a safety system that neutralises normal operation; b) be operated when any door/trap door giving access to the car roof is opened by means of a key; c) be bi-stable switch;
d) be reset together with the resetting of the safety system (See 5.5.3.2). For lifts with manual landing doors a second switch according to EN 81-1:1998 and EN 81-2, 14.1.2 shall prevent any movement of the car if any door giving access to the car roof is open. This switch shall not be accessible without using a tool. 5.5.3.2 The resetting of the safety system and the return of the lift to normal operation shall only be made by operation of an electrical reset device. 5.5.3.2.1 The resetting shall be effective only when: a) The lift is not in inspection operation; b) The stopping devices in the pit and on the car roof (EN 81-1:1998 and EN 81-2, 14.2.2.1 a), c) and d)) are not in the STOP position; c) Any door/trap door giving access to the car roof is closed and locked; d) The devices providing the safety spaces are in the inactive position (see 5.5.2). 5.5.3.2.2 A power failure shall not reset the safety system. 5.5.3.3 The electrical reset device shall be: a) Lockable with the use of a padlock or equivalent, to ensure no inadvertent operation, and b) Placed outside of the well and accessible to authorised persons only (maintenance, inspection and rescue); and c) Monitored by an electric safety device according to EN 81-1:1998 and EN 81-2, 14.1.2, which prevents normal operation when the reset device remains activated. 5.5.3.4 An additional final limit switch in conformity with EN 81-1:1998 and EN 81-2, 14.1.2 shall interrupt movements of the car under inspection operation in up direction before the buffering parts of the movable stops are hit or before the triggering device is tripping the stopping gear. The car shall be stopped before the stopping gear is tripped. This switch shall allow the movement of the car only in the down direction. SIST EN 81-21:2009

The lift shall be equipped with devices providing safety spaces in the pit (5.7.2) and a safety system (5.7.3) controlling the operation of the lift. 5.7.2 Devices providing safety spaces in the pit The devices providing safety spaces in the pit shall be: a) Either movable stops, or b) A pre-triggered stopping system. 5.7.2.1 Movable stops Movable stops shall comply with the following: a) The movable stops shall be installed in the pit to mechanically stop the car; b) The movable stops shall be fitted with buffers complying with EN 81-1:1998 or EN 81-2, 10.3 and 10.4; c) Automatically operated movable stops shall be designed to prevent damage due to any collision when they are moved between the fully retracted and extended position. 5.7.2.2 Pre-triggered stopping system The pre-triggered stopping system shall include a triggering device with its actuation means for tripping the mechanical stopping gear by a linkage when the car reaches a fixed tripping point in the down direction. 5.7.2.2.1 The triggering device shall be easily accessible so that examinations and maintenance operations can be carried out in complete safety from the pit, or from the car roof or from outside of the well. SIST EN 81-21:2009

2) The improvement of the refuge space from 0,5 m (
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