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Ref No I04-087 Date September 20_ 2004 ELEVATOR EQUIPMENT NO. 1B

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Ref No I04-087 Date September 20_ 2004 ELEVATOR EQUIPMENT NO. 1B Powered By Docstoc
					Ref No: I04-087                                                                                        Date: September 20, 2004

             ELEVATOR EQUIPMENT NO. 1B
  (Supplementary to Elevator Certification Notice No. 1A)                                              New products
                                                                                                        to certify?
                                                                                                        Call us today!
              Existing Certification not affected                                                      1-800-463-6727


Announcing: An extension of the program to include escalator brake system certified to the US Elevator Safety Code - ASME
A17.1 and Update of Elevator Certification Notice No. 1A to reference the new harmonized edition of CSA Standard B44-00,
                                                 Safety Code for Elevators
                                          See Attachment 1 for affected Class Numbers.

  Who is affected?                                                     Introduction:
  Manufacturers of escalators.                                         •    The CSA Certification Service was announced in
  What do you do?                                                           elevator Certification Notice No. 1 dated March, 1987
                                                                            based on the requirements for elevators braking system
  1.   Please contact CSA engineering staff if you have                     of CSA Standard B44-M85.
       questions or need information concerning this
       publication and how it applies to you.                          •    The program was amended in March 1988

  2.   The revisions in this publication do not affect your            •    CSA Standard B44 was harmonized with the US ASME
       currently certified product designs. We will                         17.1 code in 2000.
       automatically include this publication in your future
                                                                       •    This Inform replaces Elevator Certification Notice nO.
       certification projects, as applicable.
                                                                            1A.
  3.   If you would like to initiate a certification project,
                                                                       •    Attachment 2 contained in this Inform specifies the
       please contact CSA engineering staff to arrange for
                                                                            Clause Numbers of the applicable requirements.
       an evaluation of your product design. Please supply
       your CSA engineer with appropriate supporting                   •    Attachment 3 details the certification and test
       documentation*. If testing is needed, we will inform                 procedures of the certification Program.
       you of the samples required.
                                                                       Background and Rationale:
  *Technical information, as per Appendix A, as well as company
  name, address, factory locations and CSA file number or master       •    The escalator braking system program was developed
  contract number (if assigned) when applying.                              at the request of industry and with the advice of
  Need additional technical information?                                    elevator regulatory authorities to provide a safe and
                                                                            efficient means for compliance with CSA Standard
                    Contact Richard MacKenzie                               B44-00.
           by phone 416.747.4150, fax 416.747.4149
       or e-mail richard.mackenzie@csa-international.org               •    With the harmonization of the Canadian and US
                                                                            Elevator Safety Codes the Certification program is
                                                                            available to show compliance with US requirements.
                                                                       •    The program will offer escalator manufacturers an
                                                                            opportunity for a wider regulatory authority acceptance
                                                                            of Certified escalator braking systems.

                                                                      Visit us at www.csa-international.org
     Apply any time to                           Click on "Contact Us" for the online phone listing of our Offices and Partners
                                                             Visit us at www.shopcsa.ca to purchase a Standard!
    have your products
        evaluated




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                                                    ATTACHMENT 1
                                                Affected Class Numbers

Class No:
2411 05 :     ELEVATOR EQUIPMENT-Escalator Braking Systems
        new
2411 85     : ELEVATOR EQUIPMENT-Escalator Braking Systems-Certified to U.S. Standards

Circulated for Information:
2411 02 :       ELEVATOR EQUIPMENT-Enclosed Elevator-and Escalator Electrical Equipment
2411 82 :       ELEVATOR EQUIPMENT-Enclosed Elevator Electrical-Equipment-Certified to U.S.
                Standards

                                                    ATTACHMENT 2
Certification of an escalator braking system is based on the following:

1.       An escalator braking system shall comply with the requirements of Clauses 6.1.5.3, 8.3.1and
         8.6 of CSA Standard B44-00 / ASME A17.1-00, “Safety Code For Elevators” and B44S1-97
         Supplement No. 1;

2.       The electrical features of the braking systems shall comply with the applicable CSA C22.2
         Series Standards and ULI Series Standards or CSA B44.1 / ASME A17.5 as applicable; and

3.       The escalator brake data plate (referenced in Clause 6.1.5.3.1-d) of CSA Standard B44-00 /
         ASME A17.1-00 affixed to the escalator braking system(s) and certified under this program,
         shall incorporate the CSA Mark followed by the indicators “CSA B44-00 / ASME A17.1-00
         Clause 8.3.6”. The indicators “C”, “US” or “C-US” shall appear adjacent to the CSA Mark. The
         data plate is in addition to the electrical rating nameplate and shall be affixed in a permanent
         manner.

*Note: As there are no changes to the requirements, braking systems previously Certified are not required to
update their markings.




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                                                     ATTACHMENT 3
                                                        APPENDIX A

Note: This Appendix is provided to expedite the evaluation of the escalator braking system and to help
ensure that our testing covers your product for the range of it’s intended use. Please read carefully.


                                                    Escalator Braking System

       CSA Standard CAN/CSA B44-00 / ASME Standard A17.1, “SAFETY CODE FOR ELEVATORS,”

INFORMATION REQUIRED FOR CERTIFICATION AND TEST PROCEDURES

I.       DATA REQUIRED:

         Factory address(es) of escalator manufacturer.

         Escalator speed(s). (e.g. 0.5m/s)

         Design distance between the skirt switch and comb-plate (lower and upper landing) for each escalator
         type.

         Maximum design load per step.

         Minimum and maximum rise of escalator series.

         Width(s) of escalator series.

         Minimum and maximum slope of escalator series (30 deg is Standard)

                  Manufacturer of brake (if different from escalator manufacturer), catalogue numbers or model
                  designations, factory address, certification/listing details.

         Brake Type(s) (i.e. mechanical operation): Disc, drum, band [spring(s)], permanent magnet., etc

         Recommended minimum time between consecutive brake applications (i.e. cooling time).

                  Formulas (see Objective 2) and Certification Tables.


II.      CONSTRUCTION DETAILS:                       A set of drawings and descriptive data (specifications) shall be
         submitted detailing the following:

         A.       The Escalator Drive Machine (i.e. Primary) Brake:

                  1. Assembly Drawing, Blow-up drawing plus black and white picture of the disassembled brake
                     (or enlarged isometric view) containing bill of materials, parts description (material
                     specifications) with emphasis on the critical elements:

                       Spring description, including: Number of turns, coil diameter, spring material diameter,
                       material specification, heat treatment, spring rate, size, spring force versus coil force, etc.



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                  2. Full description (specification/composition) of the brake including all critical elements such
                     as: brake friction materials and surfaces; Methods of fastening of the friction materials; Size
                     of the braking material surface; drawing of the friction material with the brake arms.
                           Note:     Please detail alternate materials intended to be used

                           Results of in house - Endurance Tests (if available).

                       Endurance Test Results (Continuation)

                       Must Include: Dates, location, name and office address of independent third party witness,
                       description of the instrumentation used and the set-up, number of cycles of operation, time
                       between operations (cooling), type of brake used, loads, type of failure, amount of wear, type
                       of adjustments, etc.

                  3. Brake maintenance manual indicating clearances, acceptable lining wear, inspection intervals,
                     etc.

                  4. Detailed description of brake torque adjustment and measurement procedures
                     (mechanical/electrical) [e.g., (a) location, (b) break away type or dynamic type, (c) adaptor
                     piece (if any) required for torque wrench application] (d) Clockwise/counter-clockwise.

                       Notes:

                       1. The location where the torque is to be measured shall be clearly stated. E.g. “End of
                          Motor Shaft”, “Machine Input Shaft” etc;
                       2. It is important that the test set up be such that the brake torque can be accurately
                          measured. (i.e. That sufficient clearance is provided for the adaptor and torque wrench to
                          be applied square to the adjustment)

                           Indicate the back-up parameter (e.g. brake spring length).

                  5. Relationships between escalator rise and width, motor size, flywheel size, coil size, brake size
                     for each escalator type including:

                       •   Formulas covering sliding, rotating masses versus brake size (in English).

                       •   Calculations covering all round rises (e.g. 2m, 3m, etc.) and widths to be Certified.

                       Note:         Please provide flywheel drawings and sizing table as necessary.

                  6. Sketch of Proposed Nameplate (including Safety Warnings).

                  7. Dimensions for each critical mechanical part (i.e.parts directly involved in braking, and
                     operation or release of the brake, springs etc). (e.g. Brake pads, disc, flywheel).

                  8. Outline of the Principle of Operation - (Sketch or schematic).

                  9. Wiring schematic of brake with the safety circuits/control panel diagram related to brake.




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                  10. List of Electrical Components: e.g. electromagnetic release coil, controls, switches, hydraulic
                      oil pump motor and power supply are provided on the brakes,

                       Notes:       Electrical components shall comply with the requirements of CSA Standard C22.2 No 14-
                       “Industrial Control Equipment” and ULI 508 “Industrial Control Equipment” or CSA B44.1/ASME-
                       A17.5 Elevator and Escalator Electrical Equipment as applicable.. The list shall include the following
                       details:

                       •   Reference file numbers for Certified components, ULI listing sheets and copies of ULI
                           reports for UL Recognized components will help to expedite the evaluation of the brake
                           system, if available. Otherwise please provide the following:
                       •   Drawing with Bill of Material (and Material Specifications).
                       •   Description of the Insulation System, Insulation Class,
                       •   Ratings,
                       •   Markings,
                       •   Electrical Spacing(s)

                  11. Brake coils shall comply with the temperature, under and over-voltage operation tests
                      required by item 10 above for the maximum brake loads required by the application of the
                      braking system.

         B.       The Main Drive (i.e. Secondary)_Brake:

                  Outline of the sequence of operation of the main drive shaft brake.

                  Documentation to confirm compliance with B44-00, Clause 6.1.5.3.2

                           Note:     This is to confirm the construction requirement only.

                  Provide adjustment and maintenance instructions.

                  Table with brake sizes versus escalator type, rise and width.

                         Note: CSA-International offers “Letter of Attestation” service to allow manufacturers to
                  document compliance of these devices with the requirements.

         C.       Drive Train: Description of the entire drive train including the brake system.

         D.       Lower Landing Area:

         E.       Skirt Switch And Emergency Stop Assembly: (Certification /Listing Details)

         F.       The Escalator Controller: (Certification /Listing Details)

         G.       Electric Motor: (Certification /Listing Details)

         H.       Brake Coil: (Certification /Listing Details)




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III.     TESTING:

         1.       Facility:     It will be necessary for the submittor to have access to a testing facility (e.g., Test
                  Tower) with equipment to conduct the tests required by Clauses 8.3.11 & 8.3.6 of B44/ASME
                  A17.1.

                  Alternatively, the tests could be conducted in the manufacturer’s factory or on an escalator of the
                  type and size required installed in a building, subway station, railway station, as per Clause
                  8.3.6.4

                  Examination of the brake, to ensure compliance with the submitted construction data,
                  qualification of the testing set up, and acceptance of manufacturers supporting test data, may be
                  conducted at the testing site.

         2.       Required Test Equipment:

                  (1)      Calibrated testing instruments and equipment shall be provided by the submittor.
                           Calibration of instrumentation and weights shall be up to date, documented and traceable
                           to a national standard. (Examples of typical set ups are indicated in Attachment 3). In
                           connection with the testing, the following information will be required: (For the client
                           provided instrumentation).

                  (1.1)    A list of the measurement and test equipment to be including the following information”
                           type, manufacturer, model, serial number, measurement tolerances (accuracies)
                           calibration status (See item 2).

                  (1.2)    A description of how the acquired data is processed (e.g. filtering levels)

                           Note:     Provide copies of instrumentation instruction manuals.

                  (1.3)    A sketch illustrating the testing instruments set-up. Note: The stopping distance shall be
                           measured with an automated system. (e.g.., cam, proximity switch and ferrous scale) in
                           order to reduce errors due to human reaction time.

                  (2)      Calibration Record of Each Measuring and Test Device:

                           Note: Check calibration status of all instruments in advance of the test week.

                  (2.1)    Describe the system used to maintain calibration schedules (computerized recall).

                  (2.2)    How is the correct calibration status of measuring and test equipment identified?
                           (Calibration sticker with date, number and recall date).

                  (2.3)    Are permanent calibration records maintained for each measuring and test device?
                           (Provide a copy of all the calibration records). Check if the calibration date is valid at the
                           time of the test.

                  (2.4)    What standard instruments and devices are used for calibration?

                  (2.5)    Measuring and testing equipment must be calibrated to applicable reference Standards,
                           which, in turn, are certified as being traceable to internationally or nationally recognized
                           standards. Describe how the standard instruments and devices are traced to national or
                           international Standards (i.e., name of the company that performed the calibration).

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                  (3)      Test instruments shall comply with Clause 8.3.1.5 of CSA B44-00 / ASME A17.1-00.

                  (4)      The instruments used for speed and acceleration measuring shall comply with the
                           following:

                           (a)       They shall be of the recording type.

                           (b)       They shall provide data for the plotting of the brake performance curves showing
                                     time intervals, stopping distance, speed and (negative) acceleration of step during
                                     the escalator stopping The accuracy of the instruments shall be within the
                                     following tolerances:

                                     i.   The devices shall record time in increments of not more than 1/100ths second
                                          during the entire stop.

                                     ii. Time increments and total time shall be recorded with an error of less than
                                         +/- 1 percent.

                                     iii. The position of the step at each time interval shall be recorded with an error
                                          of less than +/- 1 percent.

                           (c)       Time, travel, speed (negative) acceleration shall be determined by means of a
                                     device which will provide the accuracy specified above. They shall indicate the
                                     “power off” moment (start of braking). (Second channel on the speed chart
                                     recorder).

                           (d)        The instrumentation set-up shall have as a data collector a digital tachometer
                                      (tacho generator) or a transducer with approx 10 pulses/mm step travel installed
                                      on either the main shaft or the flat step at the lower landing. (An electronic
                                      counter shall also be considered acceptable).

                           Note:     Due to slippage, measurements on the hand-rail are not acceptable.

                  (5)      The torque wrench shall be of +/- 1 percent accuracy, i.e., “Snap-On-Tools”, dial type
                           precision series with peak indicator or equal. Two directions dial.

                           WARNING:           DO NOT OVER TORQUE!

                  (6)      Weights: shall be identified by manufacturer, size; owner and owners identification mark
                           (if applicable) and calibration status (See item 2.).

         3.       Samples:       Usually a given brake/motor/gear/flywheel/(chain)/sprocket/etc. combination is
                  used by the manufacturer for a range of heights.

                  The type test program is designed to simulate the braking system response on the maximum and
                  minimum height and width of escalator for which the braking system is intended to be used and
                  to verify that this response complies with the criteria indicated in the Safety Code for Elevators.

                  The most economic method is to test as many representative escalators from a model line as
                  possible during a single investigation. e.g. The Certification of an entire model line of escalators
                  from 1.5m rise to 12m rise may consist of a typical model selection as follows:

                  (a) One, approx 2m rise (the smaller the better), 600mm width (escalator). (Simulate between
                      1.5m to 3m rises).

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                  (b) One, approx 4.6m rise, 1000mm width (escalator). (Simulate between 3m to 5m rises).

                  (c) One, approx 8m rise, 1000mm width (escalator). (Simulate between 5m to 8m rises).

                  (d) One, approx 12m rise, 1000mm width double drive, double brake. (Simulate between 8m
                      and 12m rises).

                  The objective is to determine the range of brake adjustments (alternate brake settings), that
                  comply with the load/no load stopping distance limits (i.e. braking envelope) and the maximum
                  deceleration set by the CSA B44/ASME Safety Code for Elevators Clauses 6.1.5.3.1 & 6.1.6.3.6
                  for a specific series of escalators. This provides the field inspection and maintenance personnel
                  with a basis for safe adjustment of the brakes for that series of escalators.

         4.       Supporting Documentation: For many designs there is a mathematical relationship between the
                  stopping distance and the load, torque, voltage and gap and spring length or visible spindle
                  length, or visible thread length, etc. Where such a relationships are documented (e.g. by formula,
                  tables, graphs etc), the test will attempt to validate the relationship. (i.e. compare the theoretical
                  brake envelope curve with the tests generated one).

                  Supporting design test data can help to expedite the task of selecting the appropriate models for
                  the required witnessed testing. Please provide test results of previously conducted tests, if
                  available.

                  (E.g.: Prototype testing conducted by the manufacturer during the brake development process or
                  at the request of inspection authorities and witnessed by CSA or other Recognized testing
                  laboratories).

         5.       Typical Test Procedure:

                       In order to save time, it is suggested that the manufacturer conduct preliminary automatic
                       trigger instrumented tests by himself (i.e. cold runs) to resolve logistical problems before the
                       actual test is witnessed by the CSA staff.
                       Since the instrumentation is installed towards the upper landing the weights should be loaded
                       from the lower landing.
                       The motor shall be capable carrying the 100 percent running load in the up direction. Pulling
                       the hand rail shall be permitted to supplement the starting torque of the motor.
                       Verify escalator nominal speed with hand-held tachometer on step or side skirt.
                       For safety, the maximum step load value shall not be exceeded during testing.
                       A rubber mat or cardboard is recommended to be used between weight and step.
                        Please provide sketch of the load distribution per each step for each test condition (e.g.
                       running, static) of the load tests. (Suggestion: Use the upper 2/3 of the escalator steps or less
                       to save time when loading and counting weights and to ensure that design load per step is not
                       exceeded). See Attachment 8.
                       In the steps below h1 represents the highest of the simulated rises, h2 the next highest rise etc.

                  Test 1 (h 1 Rise,):

                  -    Adjust the brake torque to the maximum specified value with the escalator stopped and no
                       load on the steps. Verify with the calibrated torque wrench. (Take at least three independent
                       readings).

                  -    Measure the following stopping distances (i.e. Test 1 to Test 5) by operating the escalator in
                       the downward direction, with the load indicated and initiating the emergency stop at a
                       predetermined points.

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                  -    Measure the stopping distances with a Running load (b1): down running at 25 percent, 50
                       percent, 75 percent and 100 percent of running load.

                  Test 2 (h 2 Rise):

                  -    Same brake torque as above.

                  -    Measure stopping distance: Unloaded - down running.

                  -    Measure the stopping distances: Running load (b2) - down running at 25 percent, 50 percent,
                       75 percent and 100 percent of running load.

                  Test 3 (h 3 Rise):

                  -    Same brake torque as above.

                  -    Measure the stopping distance: Unloaded - down running.

                  -    Measure the stopping distances: Running load (b2) - down running at 25 percent, 50 percent,
                       75 percent and 100 percent of running load.

                  -    In actual testing, 2, 3, 4 are combined. Points on the brake envelope curves for h1, h2 and h3
                       are obtained by increasing the number of weights in a progressive series (e.g., 25 percent h3,
                       25 percent h2, etc). Covers the curve between Point A and Point B.

                  Test 4 (h 1 Rise):

                  -    Adjust the brake torque to the minimum specified value.

                  -    Verify with the torque wrench at the end of the test only when the escalator is unloaded. (step
                       8).

                  -    Measure the stopping distance with 100 percent running load.

                  -    If the results are acceptable per clauses 6.1.5.3.1-b, 6.1.3.9.3-a (2) and 6.1.6.3.6 of CSA B44-
                       00 / ASME A17.1-00 then proceed with Test 5 (step 6), otherwise readjust to obtain Point (C)
                       and repeat the above tests.

                  Test 5 (h 1 Rise):

                  -    Immediately after Test 4 (step 5) load the escalator steps with the maximum static rated load
                       and hold for 5 minutes, to verify the brake’s ability to hold the stopped escalator at rest with
                       the maximum static load as per Clause 6.1.3.9.3-a (1).

                       Notes:

                       1.   The calibrated weights shall be located on the incline.
                       2.   The weights shall be equally distributed on each step.
                       3.   The weight on each step shall not exceed the maximum load rating for the step.
                       4.   It is the submittor’s responsibility to ensure that the weights are loaded onto the escalator in a
                            safe method, anticipating the safety of all personnel should the brake fail to hold while the test is
                            being set up. CSA-International staff shall be permitted to terminate the testing before completion
                            should he/she consider that the method does not provide adequate personnel safety.
                       5.   It is the submittor’s responsibility to confirm that load testing is acceptable to the building’s
                            structural engineer. (Especially for testing at installation sites!).

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                         6.   Repeat the above Tests 1 to 4 with minimum brake torque settings (100 percent, 75 percent, 50
                              percent, 25 percent and unloaded).

                              Note:   Covers the curve between Point C and Point D.

                  (7.)        Verify the maximum torque with the calibrated torque wrench. (Note: Three independent
                              readings are required).

                  (8.)        Reset the brake to set up for operation Point E (optional).
                              Note:   Must be done for escalators in service after testing to ensure safe operation!

                  (9.)        Each point on the curve shall be tested twice in the down direction (two runs for 25
                              percent load, two 50 percent, etc.). The average value of the stopping distance shall be
                              used for to determine the braking envelope curve

                  (10.)       (Optional but recommended) Tests shall be performed in the up direction with 0, 50
                              percent and 100 percent loading at minimum torque values. The roll back distance shall
                              be determined. A typical roll back distance is 3 to 5 mm. Roll back distances of greater
                              than 10 mm may be an indication of time delay within the brake operating circuits that
                              should be investigated. (Preferred sequence of testing: Up, down, down).

                              Comment:         The above steps allow the manufacturer to eliminate the need for 100
                              percent running load tests with subsequent brake adjustments for each escalator
                              installation. The points ‘A’ and ‘D’ set curves that determine the limits of adjustment for
                              the admissible stopping distances for the defined escalator without exceeding the
                              maximum deceleration value.

         6.       Determination Of Braking Envelope (i.e. curve limits)
                  Attachment 1 is provided as an example of how the brake envelope is determined:

                  Step 1 – Determine the no load, maximum torque stopping distance (i.e. Point A of the Group III
                  values on the maximum torque-load curve)

                  Note   The lower limit is set by Fig 11 of Appendix I in CSA B44-00 / ASME A17.1-00 (Criteria:
                  Maximum Deceleration 0.91m/s2) with the escalator unloaded and running down (See attachment 2).

                  Examples:           Speed = 0.5m/s -- 138mm

                  Step 2 – Determine the maximum load, minimum torque stopping distance (i.e. Point C of the
                  Group I values on the minimum torque-load curve)

                  Note: The upper limit 100 percent full running load down running is given by skirt switch to comb plate
                  distance.




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