1、l al!D Manufacturing Standards E LOW POWER EOUIPMRNT 1.0 GENERAL 1.1 SCOPE This Standard applies to all low power equipment, whether specifically mentioned or not within this Standard, rated at 3.0 KW or below. 1.2 APPLICATIONS 0 This Standard applies to electrical or electronic type equipment where
2、 use is intended, either directly or indirectly, for production purposes. Typical examples are as follows :- Gauging, testing, motive and assembly units etc. used for any purposes related to production machines or building services. 1.3 EOUIPMRNT SUITABILITY All equipment selected shall be suitable
3、for continuous use in an Industrial environment and shall satisfy the following requirements :- * Safe for personnel to use in accordance with Statutory Health and Safety legislation. * Robust and durable construction to ensure a trouble free long life without interruptions to production. * Equipmen
4、t to be constructed from standard easily obtainable components to ensure ease and low cost of maintenance. * Provision of all necessary operating and maintenance instructions and spare parts lists. * Equipment must be suitable for the particular environment where it will be used, regard must be give
5、n to ambient temperature rise. Direct ventillation/cooling by filter fans will not be allowed. 1.4 RELATED STANDARDS For purpose built equipment where design includes use of relays, solenoids or other control devices, all equipment supplied shall also comply with the following Standards :- Internati
6、onal Standard IEC 204 Part 1 (EN 60204) Ford Standard U-EXOOl Ford Standard U-RX002 All National product reliability requirements a L,OW POWER EQUIPMENT JANUARY 1994 E-EX199 PAGE 1 OF 4 E Manufacturing Standards m . 0 1.4 Continued For specialist equipment of original and/or patented design, obtaine
7、d directly from the original equipment manufacturer and identified as a standard stock unit supplied without modification to the original design or component part and contained in one case or enclosure. These products must be manufactured, assembled.and supplied in accordance with EEC requirements a
8、nd shall bear the official EC mark and date of manufacture in accoradnce with EEC Council directive of 14th June 1989 (89/392/EEC). 1.5 EOUIPMENT APPROVAL To ensure suppliers compliance with all relevant Standards, it is mandatory that all users submit a sample of each type of equipment to the local
9、 plant safety engineer for review before putting any of that type of equipment into use. 2.0 DESIGN DATA 2.1 PORTABLE EOUIPMENT Hand held tools or portable equipment used infrequently at more than one location shall be manufactured and used in accordance with Ford Manufacturing Standard U-EXO02. 2.2
10、 STATIC OR FIXED EOUIPMENT 2.2.1 Equipment intended for continuous use at one location, mounted on a bench, stand or bracket, shall be specified for operation on a 110 volt power supply. The power supply will be provided from a centre-tapped safety isolating transformer with an output voltage of + 5
11、5 volts to earth potential. 2.2.2 Specialised equipment, Only available at operating voltages of 230 volts will only be permitted with additional safety precautions as folllows :- * No device with a required supply voltage higher than 110 volts shall be connected to a socket outlet. These shall be s
12、upplied from a fused spur. ( The only exception to this will be the 23OV/llOV safety isolating transformer) * Means shall be provided to permanently fix the equipment in position. * Provision for conduit entry or a fixed cable shall be provided. LOW POWER EQUIPMENT wm PAGE 2 OF 4 E-EX199 JANue1994 l
13、 4l!liiB Manufacturing Standards E 2.2.2 Continued * Equipment shall be provided with an Earth conductor to which it shall be permanently connected, or it shall be constructed in accordance with the principles of * double insulation 9. * It shall be protected against inadvertent contact with live pa
14、rts. * A robust case or enclosure shall be provided and shall ensure a minimum degree of protection against penetration of liquids and dusts to IP54. * Provision shall be made for the termination of the Electrical supply by means of a terminal block mounted inside the equipment. Only screw terminals
15、 will be accepted for this purpose. 2.2.3 In all cases where an electrical or electronic part of the equipment is held in the hand during operation, the voltage applied shall be no greater than 55 volts to earth potential. 2.3 POWER SUPPLY 2.3.1 A standard low power transformer unit as described in
16、section 3, shall be supplied with the equipment. 2.3.2 All transformers shall be adequately sized to suit the equipment load. 2.3.3 Alternative power supply arrangements are limited to the following :- (a) Where a gauge is used for an operational inspection it is permitted for a 110 volt power suppl
17、y to be connected from the related machine tool control panel transformer provided that the equipment rating does not exceed 12OVA and that the operation will not be adversely affected by electrical interference from the machine electrical circuit. Where a gauge is located more than two metres from
18、the related machine a transformer unit shall be provided with the gauge. (b) For *purpose-built equipment eg. Leak test machine, assembly or ancilliary equipment etc. The control circuit shall operate at 24 volts dc. obtained from a safety isolating transformer and rectifier installed inside the equ
19、ipment enclosure. The transformer shall have two input phases of 400 volts and one output phase of 110 volts. One side of the transformer secondary circuit shall be connected to earth via a link. Short circuit protection shall be provided in both phases of the primary circuit and the unearthed wire
20、of the secondary circuit. a LOW POWER EQUIPMENT 0 JANUARY 1094 EEX199 PAGE 3 OF 4 E Manufacturing Standards 2.3.3 Continued (c) Where control equipment forms an integral part of the machine control system eg. gauging, sizhng devices supplied with the machine, the power supply shall be incorporated w
21、ithin the machine control enclosure. 3.0 STAWDARD LOW-POWER TRANSFORMER UNIT The transformer unit shall comprise :- * 2 pole main isolating switch rated to 1OMVA fault level minimum with a neutral link mounted adjacent to it. * One 200VA (minimum) rated double wound transformer with earthed screen b
22、etween windings. (transformer to be sized to suit required load.) l Short circuit protection on the primary side and secondary side of the transformer. EIBC fuses shall be mounted adjacent to the main isolator for primary protection. * (2) input tappings for 400 volts and 230 volts supply. * (2) out
23、put tappings at 1.10 volts and 230 volts to suit equipment. * Input and output terminals, clearly marked to show correct connections and voltage. * Earthing stud or terminal mounted adjacent to the isolating switch and neutral link. * The whole equipment to be mounted inside a robust sheet steel enc
24、losure with external fixing lugs. * Enclosure cover to be retained by a minimum of four hex. or slot headed bolts which shall be retained in the cover when loosend. * Enclosure to be sealed to a minimum degree of protection of IP54. The finish to be either stove enamelled, powder coated or equivalen
25、t durable finish. Colour shall be in accoradnce with U-MO01 ie. green exterior, orange interior. Enclosure to be provided with a lightning flash label to indicate electrical equipment contained and provided with an engraved label stating w transformer unit . . . . . VA“. * No components shall be mounted on the cover. l All components inside the enclosure shall be touchproof in accordance with IP2X (IEC529) in order to prevent contact with live parts over 24 volts potential when the enclosure is opened. LOW POWER EQUIPMENT ,ZizZZz PAGE 4 OF 4 EEX199 JANUARY1994 0 0
