EN_61558-1_Transformer

17
爬电距离和电气间隙
the 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 intermediate values of working voltages by interpolation between the values in the table. No values are required for working voltages below 25 V as the voltage test of table 8 is considered sufficient.
Openings in sheet metal through which insulated wires pass shall have rounded edges with a radius not less than 1,5 mm, or the openings shall be provided with bushing of insulating material.
非短路保护安全隔离变压器
短路保护安全隔离变压器（固有或非固有）
4
Safety test
机械变压器高压测试:
a) 变压器输入线圈端带电部件 和输出线圈端带电部件之间 (基本绝缘) b) 变压器输入线圈端带电部件 和输出线圈端带电部件之间 (加强绝缘) c) 跨越加强绝缘的带电部件和变 压器壳体之间 (加强绝缘) 2100 V
18
Question and Answer
Thank You !
(扭力等同于Table 14 of EN60335-1)
旋入绝缘材料的螺丝深度需至少3 mm加1/3螺丝直径. 作为电气连接的螺丝不得通过绝缘材料传递压力.
16
爬电距离和电气间隙
Creepage 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 partition 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.
4200 V
4200 V
5
Safety test
电子变压器高压测试:
a) 变压器输入线圈端带电部件 和输出线圈端带电部件之间 (基本绝缘) b) 变压器输入线圈端带电部件 和输出线圈端带电部件之间 (加强绝缘) c) 跨越加强绝缘的带电部件和变 压器壳体之间 (加强绝缘) 1500 V
3000 V
10
电源线和其他外部软线
具有电源线的可移式变压器，其电源线长度: – 标称直径0.5 mm2 的不得超过2 m； – 标称直径超过0.5 mm2 的需超过2 m.
室内使用变压器的电源线: – 对不超过3 kg的变压器, 不得低于轻型PVC线(H03VV-F)，或普 通橡胶线 (H05RR-F); – 对保护等级高于IPX0的变压器,不得低于聚氯丁烯橡胶线 (H05RN-F);
Transformer EN61558-1: 2005
Tutor: Date:
Mr. Jude Zhu Mar. 6. 2008
适用范围
EN61558-1; 1998 This International Standard deals with all aspects of safety (such as electrical, thermal and mechanical) of: a) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) isolating and safety isolating transformers. b) Power supply units incorporating isolating and safety isolating transformers.
0,5 0,75 1 1,5 2,5
12
Supply connection and other external flexible cables or cords
Transformers provided with cords which are moved while 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-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.
11
电源线和其他外部软线
外部电源线标称直径不得小于下表值.
Input or output current at rateds sectional areas mm2
Up to and including 3 Over 3 up to and including 6 Over 6 up to and including 10 Over 10 up to and including 16 Over 16 up to and including 25
15
螺丝和连接
若失效会导致安全问题的螺丝需承受扭力测试. 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.
8
功能测试
无负载输出电压:
变压器类型 固有短路保护变压器: － 63 VA 其他变压器: － 10 VA 100 100 输出电压与无负载标称输出 电压的偏差 ( % )
10 VA － 25 VA
25 VA － 63 VA
50
20
9
内部线
Wire-ways shall be smooth and free from sharp edges, burrs, flashes, etc. which may damage the insulation of conductors.
2
火牛 标记
变压器需有以下标记: - 标称输入电压或输入电压范围; - 标称输出电压； - 标称输出功率； - 标称输出电流； - 标称输入和输出频率； - 变压器种类符号； - 厂商或销售商名称或商标； - 产品型号；
仅适合室内使用的变压器需标有相关符号
3
火牛 标记
变压器种类符号
失效保护安全隔离变压器
EN61558-1: 2005 This International Standard deals with safety aspects of power transformers, power supplies, reactors and similar products such as electrical, thermal and mechanical safety.
13
电源线和其他外部软线
可移式变压器需有线锚地使得电源线避免变压器内部电气连接 点受拉力包括扭力的影响和电源线的绝缘受到腐蚀。 电源线需承受 25次，30N的拉力. 拉力施加在最不利的方向， 不要猛然施力，每次1 秒. 试验后, 电源线轴向位移不超过2 mm。
14
机械强度
可移式变压器(无pin式)放置在正常使用位置，从25 mm高度跌 向一平滑的钢板。跌落100次，每次跌落间隔不超过5秒。
试验后，当冷却到室温，变压器的绝缘需承受高压测试。
7
功能测试
负载条件下输出电压和输出电流: 当变压器输入端连接到标称供电电压，标称频率和输出端 接入一个在标称输出电压时产生标称输出功率的阻抗， 输出电压偏差需不超过： a) 对具有一个输出电压的固有短路保护变压器， 不超过 10%; b) 对具有多于一个输出电压的固有短路保护变压器， 最高输出电压不超过10%; 其他输出电压不超过15%; c) 对其他变压器，输出电压不超过5%. 对具有桥式整流的变压器, 以上偏差加5%.
3000 V
6
短路和过载保护
EN61558-1 point 15 变压器不能由于在正常使用中发生的短路和过载而成为不全。 输入1.06倍标称电压，短路输出端电路。 在试验中, 变压器将不得冒出火焰，溶化金属，冒出危险量 的有毒气体或可燃性气体，变压器的温度不得超过规定值。 （线圈: 165 0C, 外壳: 105 0C).