EN_61558-1_Transformer

1、n Tutor:Mr. Jude ZhuDate:Mar. 6. 20082EN61558-1; 1998This International Standard deals with all aspects of safety (such as electrical, thermal and mechanical) of:Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) isolating and safety isolating transformers.b) Power sup

2、ply units incorporating isolating and safety isolating transformers.EN61558-1: 2005This International Standard deals with safety aspects of power transformers, power supplies, reactors and similar products such as electrical, thermal and mechanical safety.3變壓器需有以下標(biāo)記:- 標(biāo)稱輸入電壓或輸入電壓范圍;- 標(biāo)稱輸出電壓；- 標(biāo)稱輸出功率

3、； - 標(biāo)稱輸出電流； - 標(biāo)稱輸入和輸出頻率；- 變壓器種類符號； - 廠商或銷售商名稱或商標(biāo)；- 產(chǎn)品型號；僅適合室內(nèi)使用的變壓器需標(biāo)有相關(guān)符號4變壓器種類符號非短路保護(hù)安全隔離變壓器短路保護(hù)安全隔離變壓器（固有或非固有）失效保護(hù)安全隔離變壓器5機械變壓器高壓測試機械變壓器高壓測試:變壓器輸入線圈端帶電部件 2100 V 和輸出線圈端帶電部件之間 (基本絕緣)變壓器輸入線圈端帶電部件 4200 V 和輸出線圈端帶電部件之間 (加強絕緣)跨越加強絕緣的帶電部件和變 4200 V 壓器殼體之間 (加強絕緣)6電子變壓器高壓測試電子變壓器高壓測試:變壓器輸入線圈端帶電部件 1500 V 和輸出線

4、圈端帶電部件之間 (基本絕緣)變壓器輸入線圈端帶電部件 3000 V 和輸出線圈端帶電部件之間 (加強絕緣)c) 跨越加強絕緣的帶電部件和變 3000 V 壓器殼體之間 (加強絕緣)7EN61558-1 point 15變壓器不能由于在正常使用中發(fā)生的短路和過載而成為不全。變壓器不能由于在正常使用中發(fā)生的短路和過載而成為不全。輸入輸入1.06倍標(biāo)稱電壓，短路輸出端電路。倍標(biāo)稱電壓，短路輸出端電路。 在試驗中在試驗中, 變壓器將不得冒出火焰，溶化金屬，冒出危險量變壓器將不得冒出火焰，溶化金屬，冒出危險量的有毒氣體或可燃性氣體，變壓器的溫度不得超過規(guī)定值。的有毒氣體或可燃性氣體，變壓器的溫度不得超

5、過規(guī)定值。 （線圈（線圈: 165 0C, 外殼外殼: 105 0C).試驗后，當(dāng)冷卻到室溫，變壓器的絕緣需承受高壓測試。試驗后，當(dāng)冷卻到室溫，變壓器的絕緣需承受高壓測試。8負(fù)載條件下輸出電壓和輸出電流負(fù)載條件下輸出電壓和輸出電流:當(dāng)變壓器輸入端連接到標(biāo)稱供電電壓，標(biāo)稱頻率和輸出端接入一個在標(biāo)稱輸出電壓時產(chǎn)生標(biāo)稱輸出功率的阻抗，輸出電壓偏差需不超過：a) 對具有一個輸出電壓的固有短路保護(hù)變壓器， 不超過10%;b) 對具有多于一個輸出電壓的固有短路保護(hù)變壓器， 最高輸出電壓不超過10%; 其他輸出電壓不超過15%; c) 對其他變壓器，輸出電壓不超過5%.對具有橋式整流的變壓器, 以上偏差加5

6、%.9無負(fù)載輸出電壓無負(fù)載輸出電壓:變壓器類型 輸出電壓與無負(fù)載標(biāo)稱輸出電壓的偏差 ( % )固有短路保護(hù)變壓器: 63 VA100其他變壓器: 10 VA10 VA 25 VA25 VA 63 VA100502010Wire-ways shall be smooth and free from sharp edges, burrs, flashes, etc. which may damage the insulation of conductors.Openings in sheet metal through which insulated wires pass shall have r

7、ounded edges with a radius not less than 1,5 mm, or the openings shall be provided with bushing of insulating material.11具有電源線的可移式變壓器，其電源線長度: 標(biāo)稱直徑0.5 mm2 的不得超過2 m； 標(biāo)稱直徑超過0.5 mm2 的需超過2 m.室內(nèi)使用變壓器的電源線室內(nèi)使用變壓器的電源線: 對不超過3 kg的變壓器, 不得低于輕型PVC線(H03VV-F)，或普通橡膠線 (H05RR-F); 對保護(hù)等級高于IPX0的變壓器,不得低于聚氯丁烯橡膠線 (H05RN-F);

8、12外部電源線標(biāo)稱直徑不得小于下表值.Input or output current at rated outputANominal cross sectional areasmm2Up to and including 3 Over 3 up to and including 6Over 6 up to and including 10Over 10 up to and including 16Over 16 up to and including 250,50,7511,52,513Transformers provided with cords which are moved while

9、 in operation shall be constructed so that the cord is adequately protected against excessive flexing where it enters the transformer. Cord guards, if any, shall be of insulating material and be fixed in a reliable manner.The cord is loaded so that the force applied is: 10 N for cords having a cross

10、-sectional area exceeding 0,75 mm2; and 5 N for other cords.The oscillating member is moved through an angle of 90 (45 on either side of the vertical), the number of flexings shall be 20 000. The rate of flexing shall be 60 per min.14可移式變壓器需有線錨地使得電源線避免變壓器內(nèi)部電氣連接點受拉力包括扭力的影響和電源線的絕緣受到腐蝕。電源線需承受 25次，30N的拉

11、力. 拉力施加在最不利的方向，不要猛然施力，每次1 秒. 試驗后, 電源線軸向位移不超過2 mm。15可移式變壓器(無pin式)放置在正常使用位置，從25 mm高度跌向一平滑的鋼板。跌落100次，每次跌落間隔不超過5秒。16若失效會導(dǎo)致安全問題的螺絲需承受扭力測試.The screws or nuts are tightened and loosened: ten times for a screw in engagement with the threads of insulating material, and five times for nuts and other screws. (

12、扭力等同于Table 14 of EN60335-1)旋入絕緣材料的螺絲深度需至少3 mm加1/3螺絲直徑.作為電氣連接的螺絲不得通過絕緣材料傳遞壓力.17Creepage distances, clearances and distances through insulation shall not be less than the values shown in Table 13 for insulating materials of group IIIa.Where an insulation barrier consisting of an uncemented snap-on par

13、tition wall is used, creepage distances and clearance are measured through the joint. If the joint is covered by adhesive bonding tape, one layer of adhesive bonding tape is required on each side of the wall in order to reduce the risk of tape folding over during production.18the insulation is in thin sheet form and consists of at least three layers.Values of creepage distances and clearances and distances through insulation may be found for interme