Embed Size (px)
Citation preview
Technical DescriptionSCANDO MINI 4/9, 10 & 12/19
YOUR LIFT HAS:
Manufacturing No.: Year: Part No. 9037 094 - 1061998 - 02 - 04
If the bottom right corner of this book is cut, the book is only valid for illustrative use!
This manual is only applicable if the manufacturing number indicated below corresponds to the manufacturing number stamped on the identificationsign of the equipment. Where there is a conflict contact Your ALIMAK representative.
Photographs and drawings are illustrative only and do not necessarily show the design of the products on the market at any given point in time.The products must be used in conformity with applicable practice and safety regulations. Specifications of the products and equipment
presented herein are subject to change without notice.
CONTENTS
ABCDEFGHIK
TECHNICAL DESCRIPTION
TECHNICAL DATA & SPECIFICATIONS
IMPORTANT SAFETY INSTRUCTIONS
OPERATING INSTRUCTIONS
SERVICE AND MAINTENANCE
ELECTRIC TROUBLESHOOTING
FOUNDATION
LIFT MAST AND TIES
PREPARATION BEFORE INSTALLATION
INSTALLATION
See Operator’s Manual for chapter C, D, E and F.See Installation Manual for chapter K.
CERTIFICATED COMPANYSS-ISO 9001 EN 29001
ALIMAK AB IS ISO 9001 CERTIFIED ISO 9001 is an international Quality Assurance Standard, which provides the parameters for
Quality Assurance Systems. The standard states how the organization of a company, working methods, etc. etc., shall function in order to attain the intended quality of products and related services.
Alimak AB, innovators and market leaders in rack and pinion driven hoists and lifts, is the first hoist and lift manufacturer, using this technology, to have achieved ISO 9001 certification.
The Certificate is valid for:
Design, Manufacture and Service related to Construction Hoists, Mast Climbing Work Platforms, Lifts and Elevators and Equipment for the Drilling and Enlarging of Shafts.
TECHNICAL DESCRIPTION
Technical description......................................Control systems...............................................Optional equipments ......................................Safety equipment ............................................
A 1A 5A 6A 8
ALIMAK 31826
A 0
Technical DescriptionLift denomination
The capacity of the lift as well as the car length can be takenfrom the lift denomination printed on the sign in the car.Multiply the first two figures of the denomination by 100 andyou have the capacity in kg. Multiply the figures after theslanting line by 100 and you have the car internal length in mm.
Example: Scando Mini 4/9. Load capacity 4 x 100 = 400 kg.Car length 9 x 100 = 900 mm or 0.9 m.
Foundation
The foundation is made of a reinforced concrete slab with castin place brackets for the base frame of the mast. The foundationis cast ”on - site” in accordance with instructions given under”Preparations before installation” and ”Foundation” in thisInstruction Manual.
Landing enclosure
In one or two sides of the enclosure there is double-leaf doorwhich is mechanically and electrically interlocked. Themechanical interlock makes it impossible to open the landingdoor unless the car is at that landing and because of theelectrical interlocking system the car will stop at once if thedoor is opened or will not start unless the door is closed.
All lift installations require space below the ground landing toenclose the buffers and act as a safety space. Where it is desiredto include this space above the foundation slab a foundationenclosure 1200 mm high is furnished. A set of steps which canbe combined in many ways is available for access to the car.
ALIMAK 31827
A 1
The picture shows a SCANDO MINI 4/9with gate location alt. A.
Limitcams
Landingenclosur
Mast
Car
Groundenclosurlanding
Cableguidingdevice
Foundat
ALIMAK 31828
A 2Lift mast
The lift mast consists of lattice work of steel tubes and angleprofiles in sections of 1508 mm length. Each section is providedwith one precision-cut rack. The sections are bolted togetherwith bolts and nuts.
Mast sections are of different types depending upon loadcapacity, lifting height, type of ties used, etc.
The lift mast is usually tied to the structure by means offexpansion bolts or by bolts to brackets cast into the wall of thestructure. It is also possible to use ties with steplessly variablelengths within certain ranges.
The lift mast is provided with top and bottom limit cams. Thesecams actuate limit switches attached to the lift car, causing it tostop automatically. There is also a final limit switch which cutsoff the main power supply, if the normal limit switches fail tofunction.
MINI-mast FE-mast SCANDO-mast
Car
The car is suspended on sound absorbing rubber pads to a framewith individually adjustable ball bearing mounted guide rollers,to the lift mast. The car structure is of square steel profiles withroof and floor of wear-resistant, non-slip aluminium checkerplate. Walls could be of sound-absorbing aluminium plate orglass-fibre reinforced plywood. Corner profiles of transparent,impact-resistant plastic allows light to enter and offer thepassengers thereby the liftway can be viewed.
The car is guided on the mast by individually adjusted ballbearing guide rollers. Safety hooks are attached to the mainframe of the car under the lowest driving pinion to ensure thatthe car is unable to climb off the top of the mast or that thepinion disengages from the rack should a roller fall off.
The car can be provided with one or two aluminium slidingdoors. The doors are electrically and mechanically interlocked.
As the car roof serves as working platform during erection andas a maintenance inspection platform it is provided with a safetyrailing. There is also a trap door in the roof and a ladder in thecar so that one can easily access the roof.
ALIMAK 31829
A 3
Lift machinery
The lift machinery unit is attached to the main frame of the caron vibration damping brackets. The car climbs by means of oneor two pinion(s) in engagement with the rack.
The pinion is mounted on a key joint and fitted to the secondaryshaft of the worm gear which is driven by a direct starting,quirrelcage induction motor with built-in electro-magnetic discbrake.
The worm gear may be equipped with a centrifugal brakepreventing the safety device from tripping if, in case of powerfailure, the car has to be taken to the ground by gravity, thusexceeding the normal travelling speed.
The safety device fitted in conjunction with the drive unit has aseparate pinion engaging the rack. The device is actuated by acentrifugal weight and stops the lift smoothly when the normaltravelling speed is exceeded.
Cable guiding system
The lift trailing power cable is guided by U-shaped guidemembers with plate springs along the lift mast.
A trolley under the car keeps the trailing power cable stretchedbetween a bracket in the lift mast and the cable guide on the car.The cable is fixed to the mast from a junction box on thebracket in the mast, to the electrical panel at ground landing.
Electric equipment
The electric equipment can be of several different typesdepending on local requirements and regulations. Theequipment is also designed and chosen to conform to operationconditions on construction sites, i.e., rough usage, subject to allweather conditions, etc.
The components have been thoroughly tested and confirm toone or several of the following international/national standards:IEC, CEE, EN, DIN, UL, CSA and SS.
In order to meet the requirements of the customer and conformto the applicable lift regulation, and code, the electrical equip-ment is designed specifically for each order.
Necessary documents, such as wiring diagrams, circuit diagramsand parts lists, are placed inside the document box in the car.
ALIMAK 31830
A 4
Safety device
Centrifugal brake
Motor
Brake
Cable bracketin mast
Flexiblepower cable
Electricjunction box
Cable bracket
Cable guidein mast
Fixed power cable
Control SystemsOperator control system
The lift can be operated from inside the lift car only. This isdone by means of:
a push button station with push buttons Up/Stop/Down, or...
...a lever controller Up/Stop/Down.
The control lever has spring return to the stop position (Dead-Man-Handle).
As a low-cost option the system can be provided with anelectronic proximity switch, ALIMAK ”Automatic StopEquipment”.
Semi-automatic control system
The lift can be operated from inside the car by means of pushbuttons Up/Stop/Down/Stop Next Landing. By pressing abutton for Up or Down, the car starts travelling in the chosendirection. When the car is approaching the desired landing, thebutton marked with symbol for Stop Next Landing is pressed.The car will then stop automatically at that landing.
The landings can be provided with a push button box withsimilar buttons and functions as in the car.
ALIMAK 31831
A 5
Landing level Car
AUTO
Optional EquipmentAutomatic stop equipment
Stopping the car at right level at the landings can be difficult forthose using the lift infrequently. With Automatic Stop Equip-ment this very operation is automated.
The equipment consists of auxiliary relays and a proximityswitch on the car. The switch is activated by steel platesattached to the mast at the landings.
By pressing the button for the function Stop Next Landingbefore approaching desired landing the car automatically stopsat level at that landing.
ALIMAK 31832
A 6
ALIMAK 31833
A 7Tone Frequency Equipment
ALIMAK hard wire Tone Frequency Equipment (TFE) forSignal Transmission is used for lift installations where it isdesirable to avoid a separate trailing control cable between baseand car. The control signals are instead transferred along theground wire of the trailing power cable.
The Tone Frequency Equipment consists of two units – onetransmitter and one receiver. The transmitter is located in thebase panel and the receiver in the main panel in the car.
The transmitter, in the base panel, converts the incomingimpulses from the landing push buttons into three differentsignals, A, B and C, corresponding to Up, Stop and Down.
These signals are then transferred along the trailing power cableup to the car. The receiver in the car panels picks up the signalsand actuates output relays corresponding to the initial signal A,B or C.
Each individual signal consists of a 3-tone sequencial codesystem which gives extreme insensibility to false or disturbingsignals.
Aliphone Communication System
Aliphone Communication System with a combined transmitter/receiver uses the power supply cable for its signals, therebyeliminating a separate communication cable. The signals aretransmitted by means of FM technique.
The equipment provides two-way communication between thelift car and base landing. Communication to the other landingsis obtained by adding optional equipment to the base station.The equipment can also be connected to a Paging System.(Announcing Speaker System).
NORMAL UPPER LANDING
Limit cam
Finalswitchcam
Finalswitchcam
Mast
Safetydevicepinion
Limit cam
Safetyhooks
Counterroller
Heel
NORMAL LOWER LANDING
Finallimitswitch
Drivepinion
Buffer springs
Limit switches
Safety EquipmentAutomatic stop at top and bottom landing
At the top and bottom landings, limit cams are mounted on themast. These cams activate the limit switches, whichautomatically stops the car. The function for the Up and Downlimit switches are backed up by a final limit switch with its owncam on the mast at top and bottom landings. This switch cutsthe power supply on all phases, and stops the car should thenormal limit switch not function.
Below the bottom landing level, close to the lift mast, buffersprings are located for the car. These buffers are designed tostop a descending car beyond its normal limit of travel.
Safety hooksTo prevent the car from climbing off the mast during erection ordismantling, or to prevent the pinions from disengaging the rackin case a counter roller or guide roller on the car comes off,safety hooks are mounted on the car frame.
The safety hooks are placed underneath the lowest drive pinionof the machinery, preventing the car from falling off the mastshould the drive pinion run off the top rack.
Safety details on the machinery plateOn the machinery plate, heels keep the pinion of the machineryand the safety device constantly engaged with the rack on thelift mast, should a counter roller or guide roller on the car comeoff.
Door interlocks on lift car and landing doorsWhen the car and landing doors are electrically interlocked, andany of the doors are opened, the lift will not operate until thedoors are closed.
A mechanically interlocked car or landing cannot be openedunless the car has stopped at respective landing.
ALIMAK 31834
A 8
Safety device
The lift has a unique safety device which smoothly stops the caron the mast should normal driving speed be exceeded.
The safety device has a shaft with a centrifugal weight anda pinion constantly engaged to the rack on themast. When the centrifugal weightactuates, the brake cone is screwedin against a brake lining inside thesafety housing. The lift is brought toa smooth stop and simultaneously thepower to the drive motors is cut off.
Phase failure relay
The electrical equipment is protected by a phase failure relay,which means that the lift can only be driven when correct phasesequence is connected.
ALIMAK 31835
A 9
TECHNICAL DATA & SPECIFICATIONS
Data sheet ............................see separate data sheetDimensions ...........................................................B 2
ALIMAK 31836
B 0
Dimensions
Base framesPlan view dimensions scale 1 : 20
Base frame for mast type Alicom andScando Mini
Base frame for mast type FE
Base frame for mast type Scando
(mm x 0.03937 = inches)
ALIMAK 31837
B 2
Mast sections
Plan view dimensions scale 1 : 20
Mast section type Scando Mini
Height/length: 1508 mm
Weight: 62 kg (std. 1508 mm)
Mast bolt dim.: M20 – at least 8.8-quality
Tightening torque: 160 Nm
* Add 8 mm for tie attachment washer TBRSB 17 x 42 to achieve actual distance to structure.
Mast section type FE
Height/length: 1508 mm
Weight: 101 kg
Mast bolt dim.: 1”UNC – at least 8.8-quality
Tightening torque: 300 Nm
Mast section type Scando
Height/length: 1508 mm
Weight: 130 kg
Mast bolt dim.: 1”UNC – at least 8.8-quality
Tightening torque: 300 Nm
Thermal expansion
It should be noted that the thermal expansion of the mast is0.012 mm/m/ °C.
ALIMAK 31838
B 3
(mm x 0.03937 = inches)
ALIMAK 31839
Landing enclosure Scando Mini 4/9
Plan view dimensions
Alt. mast D Esection mm mm
175 225
255 305
695 745
Landing enclosure Scando Mini 10/ & 12/19
Plan view dimensions
Alt. mast D Esection mm mm
285 335
875 925
B 4
(mm x 0.03937 = inches)
Without rearenclosure panel
D
650650 333
E
1315
Without rearenclosure panel
D
650 833
E
2315
B 5
ALIMAK 31840
Lift car Scando Mini 4/9
Plan view dimensions
Alt. door Door openinglocation F mm
A 550B 550C 550
* Internal height floor – roof
Alt. door G Hlocation mm mm
A 84 1088B 4 1088C 4 1088
AB 4 1160
*Internal car width and depth.
Min. permissible ”clearance” on all externaldimensions is 40 mm.
(mm x 0.03937 = inches)
A A
B
C
B
259
G
525
*1000
H
1127
1083
1010
F
ALIMAK 31841
B 6Lift car Scando Mini 10 & 12/19
Plan view dimensions
Alt. door Door openinglocation F mm
A 550B 550C 550
*Internal height floor – roof.
Alt. door G Hlocation mm mm
A 683 2088B 755 2088C 755 2088
AB 755 2160
*Internal car width and depth.
Min. permissible ”clearance” on allexternal dimensions is 40 mm.
(mm x 0.03937 = inches)
A A
B
C
B
1427
1383
1310
F
G
H
*2000
525
Scando Mini 4/9Location of landing door panels in shaft
Dimensions refer to door location in shaft.
ALIMAK 31842
B 7
(mm x 0.03937 = inches)
*Door location A + B = 1315 mm
Door location B
1155 Door location A and C
* Door openingD – D
Sill
1130
605*
*Door location B + A = 1315 mm
1155
Scando Mini 10 & 12/19Location of landing door panels in shaft
Dimensions refer to door location in shaft.
ALIMAK 31843
B 8
(mm x 0.03937 = inches)
Landingdoor panelOuter surface
*Door location A + B = 833 mm**Door location A + C = 1180 mm
Door opening
See view D – D on previous page
*Door location B + A = 1483 mm**Door location B + C = 1180 mm
*Door location C + A =1483 mm**Door location C + B = 833 mm
783
*
1483
A
*
1433 833
B
D
D
* **
783
780
1130
1433
C
Cable trolley system
Plan view dimensions scale 1 : 20
Cable trolley
Cable guide for cable trolley system
Cable support for cable trolley system
ALIMAK 31844
B 9
Lift model K L M N O P R S T U
Scando Mini 1763 915 2520 2573 915 3280 1430 1213 1970 22754/9
Scando Mini 2263 1215 2820 3073 1215 3580 930 1713 2270 257510 & 12/19
ALIMAK 31845
B 10Staircase and platform
Plan view dimensions
Staircase without platform
Staircase with platform800 x 1000 mm
Staircase with platform800 x 1000 mm
(mm x 0.03937 = inches)
KK 650
L
RS
880
650N N
2200
S
UT
O
P
M 1430
650
FOUNDATION
Foundation ......................................................Ground pressure.............................................Concrete slab...................................................Foundation pit.................................................
G 1G 1G 5G 5
ALIMAK 31846
G 0
FoundationNational regulations indicate whether the lift is to be installedon a concrete slab or if foundation pit is required.
The foundation must be prepared in a way that ensures safetyagainst cracks in rock and ground and also against overturning,sliding and lifting.
Allowable ground pressure for a specific ground can varybetween different national and local regulations. It is thereforeimportant to make sure that applicable regulations are followed.
Examples of acceptable ground pressure according to SBN1975 (Swedish Building Norms):
Moraine = 0.4 – 1.0 MPa (58 – 145 psi)
Fine sand = 0.2 MPa ( 29 psi)
Below diagram shows max. ground pressure for each combi-nation of lift type/mast type/foundation.
IMPORTANT: Please note that the foundation must alwaysbe isolated, or the surrounding soil prevented from freezing,if there is a risk of frost heave.
Ground pressure
NOTE! The ground pressure shown in the diagram is onlyapplicable to the specified combinations of lift type/mast type/foundation in these instructions. (See the table of measurementsfor foundation.)
ALIMAK 31847
G 1
Lift Model Alt. mast sections
Scando Mini4/9
Scando Mini10 & 12/19
0
100 (328)
200 (656)
300 (984)
400 (1312)
Mast heightmeter (feet)
0.10 (14.5) 0.20 (29.0) 0.30 (43.5) 0.40 (58.0)
Ground pressureMPa (psi)
Concrete slab
A concrete slab is to be made according to the followinginstructions, and according to the actual model of lift.
Anchoring of the lift (base frame) to the foundation can bemade either with foundation frame 9025 751 or with expansionbolt type Uni-Fix-In-Set or Kwik-Bolt.
It is important that the mounting holes of the foundationframe be brought level with the completed concrete surface,and that the concrete is vibrated thoroughly – especiallyaround the foundation frame. It is also important that thefinished surface is plane and horizontal.
I M P O RTA N T: It is recommended to make the concrete slaband surrounding surfaces at the same level– if staircase is to be installed. See actualdimensions on page B8.
Concrete slab
Staircase
Alt. plinth . . . . . . or additional part.
Foundation frame Part no. 9025 751
ALIMAK 31848
G 2
ALIMAK 31849
Foundation frame, Part No. 9025 751 or3/4” expansion bolt type Uni-Fix-In-Setor Kwik-Bolt
Lift model Alt. mast D1 D2 W1 W2 L Concretesection min. volume m3
Scando Mini 1675 357.5 1450 75 75 0.854/9
1675 357.5 1530 155 155 0.90
1675 357.5 1970 180 180 1.15
Scando Mini 2675 857.5 1860 185 185 1.7410 & 12/19
2675 857.5 2450 360 360 2.29
The distance L is determined by the typeof tie used. (mm x 0.03937 = inches)
G 3Concrete slab dimensions
MINI-mast FE-mast SCANDO-mast
Formwork and fixing of foundation frame
…this is done by means of crossbeams, to which the foundationframe is fastened with bolts.
Reinforcement for concrete slab
Reinforcement bar quality: minimum KS 400 (Yield strength =390 N/mm2 or 56550 psi).
Concrete quality: minimum K 25 (25 N/mm2 or 3625 psi).
The concrete must reach 70% of the required 28 dayscompressive strength before the installation of the lift may start.
ALIMAK 31850
G 4
Upper edge
Lower edge
Horizontal section
Lift model Alt. mast Upper edge Lower edge Mastsection (x – x) (y – y) (x – x) (y – y) height
Scando Mini Ø10 s 330 Ø10 s 180 Ø 10 s 270 Ø10 s 200 ≤ 4254/9
Ø10 s 350 Ø10 s 130 Ø10 s 280 Ø10 s 180 ≤ 400
Ø10 s 350 Ø10 s 210 Ø10 s 125 Ø10 s 250 ≤ 300
Scando Mini Ø10 s 370 Ø10 s 300 Ø10 s 300 Ø16 s 170 ≤ 30010 & 12/19
Ø10 s 370 Ø10 s 300 Ø10 s 140 Ø10 s 100 ≤ 300
Foundation pit, 3 alt. 4 walls
The foundation pit is made as follows.
1. Construct a concrete slab with additional vertical reinforce-ment for the pit walls, see figure.
(Identical to the one for a concrete slab level with the groundand for the lift model in question).
Note that in cases where a pit with a back wall is required,the measurements of the foundation frame (B) must beincreased by the wall thickness 175 mm (6.89 in).
(See broken line in figure below).
2. When the base slab has cured add the horizontal reinforce-ment, followed by formwork and completion of the walls ofthe foundation pit according to the specifications.
ALIMAK 31851
G 5
ALIMAK 31852
Components for attachments of enclosure
For the attachment of L-bar, 60 x 60 x 6 mm, on the foundation,we recommend the use of expansion bolts.
Please note, that these items are not furnished with the lift.
Cross-section Section through corner
Ø 10 s 130In designs with walls the C–Cmeasurement for vertical rein-forcement is increased by s 250
Reinforcementcontinue 400 mmaround the nextside
Ø 10 s 250
175
300 175
Draining holes Ø 100 (4 in.)in each corner
L-bar 60 x 60 x 6 mm to whichthe enclosure is fastened(mm x 0.03937 = inches)
Foundation pit dimension
Measurements D1 and W1, see the dimensions of the concrete slab.
G 6
75
LIFT MAST AND TIES
Lift mast and ties ............................................Attachment of MINI-mast .............................Attachment of FE- and SCANDO-mast .......
H 1H 2H 3
ALIMAK 31853
H 0
Lift mast and tiesMaximum mast height with mast sections of 76.1 x 4.2 mm tubedimension at various tie distances and overhang.
If the above directions concerning mast heights, tie distancesand overhang cannot be followed – please contact the localALIMAK Representative.
ALIMAK 31854
H 1
Alt. mast All countries except USA USA onlysections Scando Mini Scando Mini
4/9 10 & 12/19 4/9 10 & 12/19
Max. mast height 425 m – 1400 ft –Overhang 0 m – 0 ft –Tie distance *1.5 m – *5 ft –
Max. mast height 300 m 300 m 980 ft 980 ftOverhang **6 m ***0 m **20 ft ***0 ftTie distance 7.5 m 6 m 25 ft 20 ft
Max. mast height 300 m 300 m 980 ft 980 ftOverhang 12 m 15 m 40 ft 40 ftTie distance 12 m 12 m 30 ft 30 ft
Alt. Max. mast height – 300 m – –Overhang – 12 m – –Tie distance – 9 m – –
* 1.508 m (4.9475 ft)
** Top tie, overhang = 0, if permanently installed 6 m (20 ft) overhang if temporarily (notpermanent) installed.
*** 6 m (20 ft) overhang at erection, if installed from the car with half the load.
Attachment of the MINI-mast
Illustration showing the use of the universal washer.
Attachment of the FE-and SCANDO-mast
ALIMAK 31855
H 2
Max. permissible ”clearance” between clamp and mast tubes.
Alt. through bolt Alt. Expansion bolt with or without universal washer
Alt. through bolt Alt. Expansion bolt with or without universal washer
PREPARATIONS BEFORE INSTALLATION
General ............................................................Permission .......................................................Erection place..................................................Foundation ......................................................Delivery check-up ...........................................Arrangement of power supply......................
I 1I 1I 1I 1I 1I 2
ALIMAK 32684
I 0
Preparations before installationTo install your rack and pinion hoist/lift as efficiently and safelyas possible and at lowest cost, it is important that the followingpreparations are made before erector is called and installation isstarted.
Permission
Make sure the chosen erection place meets the requirements setout by local authorities for safety and inspection and that theirpermission, if necessary, to install the hoist/lift has been obtained.
Erection place
Prepare the installation site so that electric power, light, liftingequipment and tools are available and there is adequate accessfor the lift transporter Ð beware of overhead obstructions.
If possible, prepare the casting of ties and landing accessoriessuch as supports, bridges and railing. Suitable places forattaching the ties are vaults, balconies or other concrete or steelstructures.
Remember that these structures must be strong enough to absorbthe reaction forces of the ties.
All mast sections should be stored on dry firm ground and asclose to the erection place as possible.
Foundation
Prepare the foundation with parts required for fixing the baseframe of the mast. See chapter ÒFoundationÓ in the manualTechnical Description.
IMPORTANT! Make sure before casting the foundation thatthe measurement between the centre founda-tion frame and the wall corresponds to theties to be used.
Delivery check-up
Check the delivery against shipping lists and look for transpor-tation damage.
Should there be any damage, report the same to the responsibletransportation insurance company within 7 days from the dateof arrival of the goods.
Other claims should be made to ALIMAK representative withinthe same period.
I 1
STOP
Transportationdamage?
Shortages?
ALIMAK 32685
i 1
i 2
i 3
Arrangement of power supply
Direct On Line (DOL) starting of electric motors results in a veryhigh starting current. The current must overcome the resistancein the cables which results in a voltage drop. This voltage dropoccurs not only in the trailing cables, but also in the powersupply cable installed between the jobsite distribution board andthe electric panel ÓBÓ at the base. The total voltage drop is thesum of the voltage drop in all the cables. The consequence ofthe voltage drop is a substantial reduction in the output torquefrom the motor.
In order to avoid starting problems it is of the utmost importancethat the main power supply is adequately sized with respect tothe starting current and the voltage drop. The following figuresshould be noticed:
Ð During starting conditions, in the upward direction with ratedload, the voltage drop must not exceed 15% of the ratedvoltage when measuring at the motor terminals. In the Basepanel, the voltage drop at the incoming power supplyterminals must not exceed 3% of the rated voltage during thestarting conditions.
Ð Once the rated speed is established during upward travel withrated load, the voltage drop must not exceed 5% of the ratedvoltage when measuring at the motor terminals. In the Basepanel, the incoming power supply voltage should, in practice,not drop at all, i.e. not exceed 1 Ð 2 % drop.
Clients power supply
Supply cables to hoists and lifts with DOL or Y/D starting
The 3-phase power supply cable from the jobsite distributionboard to the ÓBÓ panel at the base can be calculated from theformulas below. The formulas are applicable for the most commontypes of hoists and lifts having 1, 2 or 3 motor drive machinerywith DOL-starting at 400V 50Hz and 460V 60Hz and ScandoSuper with electro hydraulic drive and Y/D (Star/Delta) motorstarter.
ALIMAK 32686
I 2
i 4
I 3
Supply cables to hoists and lifts with VFC (Variable Frequency Converter)
The size of the power supply cable must always comply withRules and Regulations stipulated by the local Autority forelectrical installations. ClientÕs power supply cable must also besized to ensure that the voltage drop in the Base panel does notexceed 3% when starting with full load in the upward direction.
The size of the power supply cable can be calculated by follo-wing formula:
a = L x P x 0,0056
where
a = Conductor area in mm2 copper
L = Lenght in m of the power supply cable from distributionboard to the Base panel
P = Drive motor power in kW on the hoist/lift
IMPORTANT! The power supply cable must be sized accor-ding to the drive motor power installed on thehoist/lift. Minimum size of the supply cableis shown on the table below. The table refersto supply voltage 400V to 460V 50/60Hz.
ALIMAK 32687
No of Motor power Motor power Power supply Minimum recom-motors continuous/25% inter- continuous/25% inter- cable to Base panel. mended Cu-
mittent 50 Hz mittent 60 Hz Conductor area, copper conductor area
1 4/5,8 kW 4,6/6,7 kW a = L x 0,09 mm2 6 mm2
1 7,5/9,5 kW 8,6/10,9 kW a = L x 0,17 mm2 10 mm2
2 7,5/9,5 kW 8,6/10,9 kW a = L x 0,34 mm2 16 mm2
3 7,5/9,5 kW 8,6/10,9 kW a = L x 0,51 mm2 25 mm2
1 Scando Super 45 kW 52 kW a = L x 0,68 mm2 35 mm2
a = Conductor area mm2, Cu. To be rounded up to standard sizes, i.e. 10, 16, 25, 35 mm2 etc.
L = Length in m of the 3-phase power supply cable from the jobsite distribution board to the Base panel.
For conductor sizes in AWG No:s, see conversion table below.
Power supply from generator set at jobsite
Required generator power
It is recommended that the generator supplier is requested tosupply a unit which is capable of providing a starting currentof A amper�s at rated voltage. If this is not possible, theguidelines below can be used.
For DOL starting of Alimak hoists and lifts having 1, 2 or 3drive motors (size 132M, 7,5/8,6 kW) we suggest the followinggenerator sizes:
Ð 1 motor drive size 132M, 7,5 kW (8,6 kW) 70 kVA min.
Ð 2 motor drive size 132M, 7,5 kW (8,6 kW) 140 kVA min.
Ð 3 motor drive size 132M, 7,5 kW (8,6 kW) 210 kVA min.
Ð 1 motor drive Scando Super 45 kW (52 kW) 100 kVA min.
It should be noted that the recommended generator sizes arelarge due to the fact that the DOL starting of the motor(s) drawsa large current resulting in a voltage drop which would causethe contactors to oscillate on and off. A smaller generator mightbe used but this can only be established by practical experiencerelated to a specific make and model of the generator set.
For VFC (Variable Frequency Converter) operated hoists andlifts the generator size in kVA should be approximately 2 x theinstalled motor power in kW.
ALIMAK 32688
I 4Installed motor power Minimum cable size
kW (copper) mm2
3 Ð 5,5 46 Ð 10 6
11 Ð 20 1021 Ð 30 1031 Ð 40 1641 Ð 50 2551 Ð 75 (35) 50
Voltage drop in the power supply
Typical symptoms
Ð The hoist/lift will not start with the full rated load.
Ð The brakes will not lift when starting in the Up-direction.
Ð The contactors oscillate on and off (ÓshatterÓ) when startingwith full load in the Up-direction.
Ð The contacts of the Up and the main contactors get damaged.
Measures to overcome a voltage drop problem at the jobsite
The best method to avoid any voltage drop problem is to make aproper engineering review of the conditions at the job sitebefore installing the hoist/lift. When it is already installed, theremaining options are limited.
However, should a situation occur where the power supply seemsto be insufficient, it is important to determine whether thisdepends on the voltage drop in the power supply or somethingelse. Use an instrument to measure the incoming power supplyvoltage in both the B-panel at the base and the M-panel on/inthe car. Make the readings during starting conditions in theUpward direction with rated load in the car. If the voltage dropexceeds the values given above, one or more of the followingmeasures can be taken:
1. Increase the conductor size in the power supply cable fromthe jobsite distribution board to the B-panel at base.
2. Increase the conductor size in the trailing power cablesbetween the Base panel and the car. Due to mechanical andperformance reasons, the conductors in the trailing cableshould not exceed 10 or 16 mm2.
The fixed cable to the junction box at 1/2 lifting height canbe increased in size.
3. Reduce the rated load.
4. Install a step-up transformer xxx/690V in the power supplyin order to increase the voltage.
Note! Motor windings must be adaptable to this higher voltageotherwise the motor must be changed. To give the best possi-ble advantage, the step-up transformer should preferably belocated close to the jobsite distribution board.
5. Use some kind of soft start equipment.
If you have any questions regarding the power supply cablesor the trailing cables, please contact Alimak for advice.
ALIMAK 32689
I 5
ALIMAK 32690
Conversion table mm2 to AWG
AWG No. mm2 Nearest IEC std.(American Wire Gauge) mm2
0000 107,2 95 alt. 120
000 85,03 70 alt. 95
00 67,43 70
0 53,48 50
1 42,41 35 alt. 50
2 33,63 35
3 26,67 25 alt. 35
4 21,15 16 alt. 25
5 16,77 16
6 13,3 10 alt. 16
7 10,55 10
8 8,366 6 alt. 10
9 6,634 6
10 5,261 4 alt. 6
11 4,172 4
12 3,309 2,5 alt. 4
13 2,624 2,5
14 2,081 1,5 alt. 2,5
15 1,650 1,5 alt. 2,5
16 1,309 1,5
17 1,038 1,0 alt. 1,5
18 0,8231 0,75 alt. 1,0
I 6
