Comparison of Vacuum Arc Behaviors Between Axial-Magnetic-Field Contacts
Comparison of Vacuum Arc Behaviors Between Axial-Magnetic-Field Contacts
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DOI：
10.1109/tps.2007.914184
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发表时间：
2008-02
影响因子：
1.5
通讯作者：
Zhiyuan Liu;Shaoyong Cheng;Yuesheng Zheng;M. Rong;Jimei Wang
中科院分区：
文献类型：
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作者：
Zhiyuan Liu;Shaoyong Cheng;Yuesheng Zheng;M. Rong;Jimei Wang
采用高速数码摄影和电弧电压测量方法，比较了三种槽型轴向磁场触头在两种固定触头间隙下的真空电弧行为。立体角是指阳极在阴极中心对向的角度或阳极直径与差距长度的比值（D/g）。与AMF的耦合影响，我们观察到，与D/g比48 mm/8 mm的情况相比，D/g比48 mm/14 mm，电弧保持在低电流模式，直到更高的电流。当D/g比为58 mm/14 mm时，随着电流的增加，电弧模式转变与D/g比为58 mm/8 mm的情况相似。然而，在D/g比为66 mm/14 mm的情况下，与D/g比为66 mm/8 mm的情况相比，电弧在较低电流下变成高电流模式。相应地，在D/g比为48 mm/14 mm的情况下，电流峰值处的电弧电压接近于D/g比为48 mm/8 mm的情况，而在D/g比为58 mm/14 mm的情况下，电流峰值处的电弧电压接近于58 mm/8 mm的情况。然而，对于66 mm的触头直径，D/g比为66 mm/14 mm的电弧电压高于66 mm/8 mm的情况。D/g比为66 mm/8 mm的弧比48 mm/8 mm的情况更弥散。此外，当电流峰值为17.8 kA及以上时，D/g比为66 mm/14 mm的电弧也比48 mm/14 mm的情况更扩散。采用槽式AMF触头的真空灭弧室开断能力的关系可表示为I= k ×（D/g）+B，其中k和B为常数。
We compared vacuum arc behaviors of three slot-type axial-magnetic-field (AMF) contacts at two fixed contact gaps using high-speed digital photography and arc-voltage measurements. Solid angle is subtended by anode at the center of cathode or the ratio of the anode diameter to the gap length (D/g). With coupled influence of the AMF, we observed that with the D/g ratio 48 mm/14 mm, the arc kept in low current modes until higher current compared with the D/g ratio 48 mm/8 mm case. With the D/g ratio 58 mm/14 mm, the arc-mode transitions with the increase of current were similar as the D/g ratio 58 mm/8 mm case. However, with the D/g ratio 66 mm/14 mm, the arc became high current modes at lower current compared with the D/g ratio 66 mm/8 mm case. Correspondingly, with the D/g ratio 48 mm/14 mm, arc voltages at current peaks were close to the D/g ratio 48 mm/8 mm case, whereas arc voltages at current peaks with the D/g ratio 58 mm/14 mm were close to that of the 58 mm/8 mm case. However, with a contact diameter of 66 mm, the arc voltages with the D/g ratio 66 mm/14 mm were higher than the 66 mm/8 mm case. The arcs with the D/g ratio 66 mm/8 mm were more diffuse than the 48 mm/8 mm case. Moreover, the arcs with the D/g ratio 66 mm/14 mm were also more diffuse than the 48 mm/14 mm case when the current peak was 17.8 kA and above. The relationship between interrupting capacity of vacuum interrupters with the slot-type AMF contacts could be expressed as I=ktimes(D/g)+b, where k and b are constants.