4 Liftinstituut in general Established in Implies over 75 years of experienceHead-office Amsterdam/Netherlands based with several regional offices elsewhere in the NetherlandsOffice in Istanbul/TurkeyApp. 170 employees of which 125 inspectorsClose co-operation with leading universi- ties, a.o. Delft University of Technology
5 Liftinstituut in general First European institution to be appointed as Notified Body with regard to Lift Directive 95/16/ECIn March 2009 Liftinstituut was appointed as AECO (Acreditated Elevator/Escalator Certification Organization) by ANSI!Active participation in meetings of Notified BodiesInvolved in many normalization committees for codes and standards in Europe / North America / ISO
6 EN 81-1/2:1998 + A3:2009 Valid from 1-1-2010 Main items: restriction of scope (0.15 m/s)fixing systems of removable guardsprotection against unintended movementslevelling and re-levelling accuracyCEN declares items 3 and 4 are not related to the new Machinery Directive.Therefore transition period of 24 months for items 3 and 4 (comply fully )
7 Restriction of scopeThe MD (2006/42/EC) includes some changes for LD (95/16/EC):Border between lifts and machines is more clear:Clause 1.3 g EN 81-1 (1.3 h EN 81-2)Lifts which have a speed of less than 0.15 m/s are excluded.
8 Fixing systems of removable guards The MD (2006/42/EC) includes some changes which have effect on lifts:Clause EN 81-1/2The fixing system of guards, used specifically to provide protection against mechanical, electrical or any other hazards by means of a physical barrier, which have to be removed during regular maintenance and inspection, remains attached to the guard or to the equipment when the guard is removed.Vang vanuit binnenzijde kooi onderhoud
9 Levelling and re-levelling accuracy Clause EN 81-1 (clause EN 81-2)The stopping accuracy of the car shall be ± 10 mm;A levelling accuracy of ± 20 mm shall be maintained. If, during e.g. loading and unloading phases, the value of 20 mm is exceeded, it shall be corrected.EN 81-70
10 Protection against unintended car movement Clause 9.11 EN 81-1 (clause 9.13 EN 81-2)Means shall stop unintended car movement away from the landing with the landing door not in the locked position and the car door not in the closed position.
11 Protection against unintended car movement Is a result of failure in any single component of the lift machine or drive control system upon which the safe movement of the car depends.Excluded are failure of the suspension ropes or chains and the traction sheave or drum or sprockets of the machine. (loss of traction)
13 System descriptionDetectorMicroprocessorelementStopping
14 DetectorsThe unintended movement of the car shall be detected by at least one switching device at latest when the car leaves the unlocking zone (7.7.1).be a safety contact in conformity withbe connected in such a way as to satisfy the requirements for safety circuits in (Fault tree) or (PESSRAL).Punt 1 is schakelaar met kanaalschaats forced actuation2 a ABC schakeling, 2 b pess
15 Stopping element on the car, or on the counterweight, or The stopping element of the means shall act:on the car, oron the counterweight, oron the rope system (suspension or compensating), oron the traction sheave (e.g. on the sheave directly or on the same shaft in the immediate vicinity of the sheave).
16 Stopping element 1 gn for unintended movements in up direction, Maximum retardation of the car with any load in the car, up to 100 % of rated load:1 gn for unintended movements in up direction,the values accepted for safety gears in down direction.
17 Stopping element 1 gn for unintended movements in up direction : the deceleration values should be verified or calculated taking into account an empty car and a fully loaded car.
18 Stopping elementThe values accepted for safety gears in down direction:This means that higher deceleration values than 1 gn are allowed.f.e. Instantaneous safety gears or progressive safety gears at a lower speed or loads
19 Stopping element Possible elements: “Normal” brake Traction sheave brakeRope gripperOverspeed governorSafety gearSafety valve
21 Typical sequence Car is not at the level and starts to re-level. Car accelerates and passes allowed levelling zone.Power is removed from motor/brake and UCM is activated.UCM means is stopping the car.
23 Response time The maximum speed is depending on: System setup (weights, sheaves, travel)Drive system (power, detection)Response time [detection(3), stopping element (4)]
24 Questions to ask What is the levelling zone? What is the delay of electrical system?What speed can the drive accomplish?What is the natural acceleration?CWT mass, Car mass, Nominal loadRule of thumb:Empty: gn = g x ((CWTm – Carm) / (CWTm + Carm ))Full: gn = g x ((CWTm – Carm) / (CWTm + Carm + Q))Punt 3 indien interne controle op snelheid mag de normale versnelling in beschouwing genomen worden.
25 Questions to ask What is the delay of stopping element? What is stopping force?Is the final result within the limits
26 (EC)Type examination Type examination for A3 component A3 certification can be part of EC type examination component, only one certificate and report required.
27 Examples Overspeed governor Delay in electrical activation (ms) Delay in activating stopping element (cm)Reliability of acting components (tests)
28 Examples Safety gear Delay in mechanical activation (cm) Minimum activation speed (0 m/s)Maximum activation speedDurability 20 tests with maximum activating speedBraking force (car must stop also upwards)0 m/s in verband met ingrijpen elementen van de vang20 testen, 10 op, 10 neer, min. 5 keer met een vangelement, diverse belastingen
29 Examples Rope gripper Delay in electrical activation (ms) Minimum activation speed (0 m/s)Maximum activation speedDurability 20 tests with maximum activating speedBraking force (car must stop also upwards)De frictie coeff. is snelheidsafhankelijk en kan invloed hebben op de remkracht
30 Examples Machine Brake Not used for normal stopping Check on correct functioningContacts (movement of brake claws)Torque checkDelay in electrical activation (ms)Braking force / Traction!Traction ivm met remweg
31 Hydraulics EXAMPLE Second lowering valve on cylinder Independently openedValves need to be checked on correct function(self-monitoring).
32 Certificate information Certificate for the complete UCM-Protection systemtype and application of the unintended car movement protection system;the limits of the key parameters (as agreed between laboratory and manufacturer);the test-speed with relevant parameters for Final Inspection use;the type of parts on which the stopping elements act;the combination of “detecting” device and stopping system of the means.
33 Certificate information Certificate for the detector as part of the UCM-Protection systemtype and application of the detector as part of the UCM-Protection system;the limits of the key parameters (as agreed between laboratory and manufacturer);depending on the working principle of the “detecting” device:the maximum applicable parameters before activating the braking system; e.g.limit values of distances / detection time / speeds / accelerations etc.delay timethe combination of “detecting” device and the intended stopping system of the means.
34 Certificate information Certificate for the stopping system as part of the UCM-Protection systemtype and application of the stopping system as part of the UCM-Protection system;the limits of the key parameters (as agreed between laboratory and manufacturer);the test-speed with relevant parameters for Final Inspection use;depending on the working principle of the stopping system:the maximum applicable parameters of the stopping system; e.g.min. / max. breaking force / torquedistances from begin of activation until reaching min. / max. breaking force / torquestopping distances (movement of the car with engaged stopping elements) in conjunction with wear and tearmaximum permissible speed before deceleration occursdelay timethe type of parts on which the stopping elements act;the combination of “detecting” device and stopping system of the means.
Your consent to our cookies if you continue to use this website.