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Tungsten-family electric contact point manufactured by the power metallurgy method provides excellent electrical conduction, hardness, mechanical strength, and resistance to shock, and ARC and abrasion at high contact pressure.
Youngjin Metal developed 80% tungsten + 20% copper electric contact point in 1993, using internal technology only, and provided it to domestic ultra-high voltage breaker manufacturers since then.
Type
|
Composition
(%) |
DENSITY |
Electric conductivity
IACS (%) |
Hardness
( HRB ) |
Applications
|
Copper
Tungsten |
20:80 |
15.1~15.7 |
32~42 |
95~105 |
Extra-high voltage breaker, ARC TIP, GCB, OCB, GLBS, ASS, ARD contact of ACB, and ATS. Contact of the tap conversion transformer, starter contact for automobiles, electrode spot welding tips for discharging process. |
25:75 |
14.3~15.1 |
37~47 |
90~100 |
30:70 |
13.7~14.5 |
43~53 |
85~95 |
| 35:65 |
13.2~14.0 |
45~55 |
80~90 |
| 40:60 |
12.8~13.7 |
47~57 |
78~90 |
MAKER |
G I S |
G C B |
Hyosung |
72.5KV 20KA
145/169KV 40/50/63KA
170KV 31.5/50KA
220KV 40KA
245 / 300KV 50KA
362KV 40 / 63KA
420 / 550 / 800KV |
145KV 40/50KA
169KV 40KA
170KV 31.5/50KA
245KV 40KA
362KV 40/50KA
|
LSIS |
170KV 50KA
362KV 50KA |
- |
Dongnam |
170KV 50KA |
- |
|
