1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPower transformer and reactor fittingsPart 12: FansBS EN 50216-12:2011National forewordThis British Standard is the UK implementation of EN 50216-12:2011.The UK participation in
2、its preparation was entrusted to Technical CommitteePEL/14, Power transformers.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correc
3、t application. BSI 2011ISBN 978 0 580 74724 3ICS 29.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 July 2011.Amendments issued since publicationAmd. No. Dat
4、e Text affectedBRITISH STANDARDBS EN 50216-12:2011EUROPEAN STANDARD EN 50216-12 NORME EUROPENNE EUROPISCHE NORM April 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centr
5、e: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50216-12:2011 E ICS 29.180 English version Power transformer and reactor fittings - Part 12: Fans Accessoires pour transformateurs de puis
6、sance et bobines dinductance - Partie 12: Ventilateurs Zubehr fr Transformatoren und Drosselspulen - Teil 12: Ventilatoren This European Standard was approved by CENELEC on 2011-03-21. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for gi
7、ving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official
8、 versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committe
9、es of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and th
10、e United Kingdom. BS EN 50216-12:2011EN 50216-12:2011 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50216-12 on 2011-03-21. The following dates were
11、 fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012-03-21 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-03-21 EN 50216-12 is to be read in conju
12、nction with EN 50216-1, Power transformer and reactor fittings Part 1: General. _ BS EN 50216-12:2011 3 EN 50216-12:2011 Contents 1 Scope . 42 Normative references . 43 Terms and definitions 54 Requirements 54.1 Rated values . 54.2 Rated power and noise . 64.3 Design of the drive 64.4 Design of the
13、connection box . 64.5 Design of the housing . 64.6 Design of the fan wheel 64.7 Design of the protective grating / basket guard 64.8 Materials . 74.9 Mechanical design 74.10 Surface protective coating 75 Identification 75.1 Specifications for the fan rating plate . 75.2 Specifications for the motor
14、rating plate . 86 Tests . 86.1 General . 86.2 Routine tests . 86.3 Type tests . 87 Transport and storage 88 Installation and operation, operational performance 99 Technical documentation 9Annex A (normative) Ordering designations .10Annex B (informative) Performance of the fans 11Annex C (informativ
15、e) Design example 12Bibliography 13Figures Figure B.1 Performance of the fans . 11Figure C.1 Design example 12BS EN 50216-12:2011EN 50216-12:2011 4 1 Scope EN 50216-12 deals with fans for oil-to-air coolers used for transformers as well as fans used for blowing out radiators. Only fans operating axi
16、ally are dealt with in this standard specification. This standard specification defines the dimensions and requirements for ensuring fan interchangeability and uniform fan assembly. 2 Normative references The following referenced documents are indispensable for the application of this document. For
17、dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 22768-1 General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1) EN 2276
18、8-2 General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications (ISO 2768-2) EN 50216-1:2002 Power transformer and reactor fittings Part 1: General EN 50262 Cable glands for electrical installations EN 60034-1 Rotating electrical machines Part 1: Rating an
19、d performance (IEC 60034-1) EN 60529 Degrees of protection provided by enclosures (IP Code) (IEC 60529) EN 60721-3-4 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 4: Stationary use at nonweather protected location
20、s (IEC 60721-3-4) EN ISO 3506-1 Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs (ISO 3506-1) EN ISO 5801 Industrial fans Performance testing using standardized airways (ISO 5801) EN ISO 13857 Safety of machinery Safety distances to prevent hazar
21、d zones being reached by upper and lower limbs (ISO 13857) ISO 10816-1 Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 1: General guidelines ISO 13347-1 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Pa
22、rt 1: General overview ISO 13347-3 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 3: Enveloping surface methods ISO 14694 Industrial fans Specifications for balance quality and vibration levels BS EN 50216-12:2011 5 EN 50216-12:2011 3 Terms and
23、definitions For the purposes of this document, the following terms and definitions apply. 3.1 drive depending on the specification the motor used to drive the fan wheel can be either a three-phase a.c. motor, an a.c. motor or a d.c. motor. The motor is mounted rigidly in the housing 3.2 connection b
24、ox the electrical connection between the external power supply (and control system if this exists) and the internal connection is made in the terminal box. The terminal board is located in the connection box 3.3 housing the housing is used for attaching the fan to the radiator or cooler; the housing
25、 also supports the motor. In addition the protective grating and / or basket guard is / are attached to it 3.4 fan wheel the fan wheel is mounted rigidly on the motor axle / rotor 3.5 protective grating / basket guard the protective grating or basket guard is used to prevent accidental contact with
26、the rotating parts. Furthermore, the protective grating or basket guard also prevents large foreign bodies from coming into contact with the parts 4 Requirements 4.1 Rated values The following designations are used: - f Hz = frequency; - UrV = rated voltage; - I A = operating current during free blo
27、wing; - IrA = rated current of the motor; - P1 W = active-power input during free blowing; - % = overall efficiency of the fan; - N 1/min = rotational speed; - qVm3/s = volume flow of the fan during free blowing; - psFPa = maximum static pressure which the fan can produce, in producing static pressu
28、re volume flow is reduced; - LWAdB(A) = A-weighted sound power level of a fan during free blowing; - D mm = diameter of the fan wheel. NOTE The characteristic curve should be delivered by the supplier (psF= f(qV). The noise is dependent on the working point and the installation conditions. BS EN 502
29、16-12:2011EN 50216-12:2011 6 4.2 Rated power and noise The values for air power and noise apply when protective gratings are fitted. The volume flow refers to an air density = 1,20 kg/m at a temperature of t = 20 C and an air pressure of 101,325 kPa (this corresponds to a site altitude below 1 000 m
30、). They are to be measured at rated voltage with the associated frequency provided that no other operating data has been specified in the order. 4.3 Design of the drive The motor shall comply with EN 60034-1 and suitable for unprotected outdoor installation. The provided degree of protection is to b
31、e at least IP54 or above as per the order specification in accordance with EN 60529. Thermal class 155 as per EN 60034-1 applies to all motors. Condensation water and any other intrusive water shall be able to run off without any damaging effect. This applies to both horizontal and vertical mounting
32、 of the fan (blowing upwards). The bearings of the motor shall be made in such a way that they are able to guarantee a trouble- and maintenance-free running time (continuous operation) of at least 4 years (at least 3 years for four-pole operation) or rather as agreed upon. The connecting lead betwee
33、n the winding space of the motor and the cable compartment of the terminal box can be run on both the inside and the outside. 4.4 Design of the connection box The connection box (if present) shall be mounted in such a way that it is easily accessible. The connection box is to provide protection to a
34、t least IP54 as per EN 60529. Condensation water in the connection box shall not affect operation or lead to any damage. Each of the terminals shall be suitable for holding down two 2,5 mm leads at I 1,5 A each terminal shall be suitable for holding down two 4 mm leads. The earthing screw in the con
35、nection box shall be easily accessible. Captive screws shall be used for the cover of the connection box. Screwed cable glands (at least 2) as per EN 50262 made from nickel-plated brass are to be used for the connecting lead inlet. The cover seal shall be secured using suitable measures so that over
36、pressing or slipping is prevented at all times. 4.5 Design of the housing As a rule the housing is cylindrical. The motor with fan wheel (chosen by the manufacturer) is mounted on to the housing. The fixing points of the fan are likewise located on the housing. If a connection box is mounted on the
37、outside of the housing then the connection cables are to be suitably fixed. The direction of air flow (in connection with the rotational direction) is to be indicated on the housing using a durable marking (can also be combined with the rating plate). 4.6 Design of the fan wheel The fan wheel shall
38、be designed in such a way that no water is able to gather. This applies to both horizontal and vertical mounting of the fan (blowing upwards). 4.7 Design of the protective grating / basket guard Fans for radiator cooling systems are to be fitted with 2 protective gratings (inlet and discharge sides)
39、, fans for oil-to-air coolers are to be fitted with 1 protective grating (either inlet or discharge side). The opening widths of the protective gratings on both the inlet and discharge sides are to provide protection as per EN ISO 13857. The protective grating or the basket guard is to be rigidly mo
40、unted on the housing. BS EN 50216-12:2011 7 EN 50216-12:2011 4.8 Materials Fan housing: Chosen by manufacturer Fan wheel: Aluminium with high quality coating or plastic, e.g. PP10.20 VT.- black with approximately 25 % solid body content (glass) Connection box: Cast iron, steel or aluminium with high
41、 quality coating Protective grating / basket guard: Inlet side: steel or stainless steel; Discharge side: steel with coating or galvanized Terminal board or terminal block: Insulating material ceramic or equivalent material or plastic material Motor housing: Chosen by manufacturer Threaded bolts, wa
42、shers, nuts for electrical connections: Made from material which is not dangerous on contact and which is non-corrosive Screws, washers, nuts, except for electrical connections: Stainless steel, e.g. A2-70 in accordance with EN ISO 3506-1 Strain washers: Non-rusting spring steel Other materials are
43、to be agreed upon. 4.9 Mechanical design To prevent rusting underneath the surface all external components shall be welded completely without breaks. The vibration severity determined at the outer perimeter of the fan housing in accordance with ISO 14694 (BV - 3) or ISO 10816-1 (class 1 zone B). Tol
44、erances as per EN 22768-1 and EN 22768-2. 4.10 Surface protective coating The buyer and manufacturer are to agree upon the corrosion protection treatment and coating. At the same time the necessary environmental conditions are to be observed. The environmental conditions shall correspond to EN 60721
45、-3-4. 5 Identification 5.1 Specifications for the fan rating plate The fans shall have a clearly visible all-weather rating plate displaying the ratings for 50 Hz and/or 60 Hz operation. Type designation and serial number of the manufacturer and year of manufacture volume flow in m/s during free blo
46、wing, rotational speed in min-1during free blowing, BS EN 50216-12:2011EN 50216-12:2011 8 active-power input in W during free blowing, rated current consumption at rated voltage given in A. It shall be evident from the rating plate whether or not there is an internal, thermal circuit breaker present
47、, which will disconnect the current in the event of a fault. A direction arrow indicating the direction of air-flow (in connection with the rotational direction) shall either be attached to the rating plate or mounted in its immediate vicinity (see 4.6). 5.2 Specifications for the motor rating plate
48、 Motor rating plate according to EN 60034-1. A separate rating plate for the motor shall be attached to the fan housing if this is specified in the order. The data of fan and motor shall not be identical. 6 Tests 6.1 General The tests are to be carried out at the fully assembled fan (with protective
49、 grating). Performance measurements (volume flow, static pressure, active-power input and rotational speed) are to be carried out in accordance with EN ISO 5801. Noise measurements are carried out according to ISO 13347-3. Terms, quantities, measuring instruments as per ISO 13347-1. Test object: fan (total noise during fr
