The plate is most typically rotated by a centrifugal mechanism, thus advancing the ignition timing (making the spark occur earlier) at higher revolutions. A much softer material than silver tungsten or silver tungsten carbide, silver graphite has a higher erosion rate. HAMMBREAKER offers heavy duty shredding machines for the recycling industry. More than 10 years experience for manufacturing in this line 6. The position of the contact breaker is set so that it opens (and hence generates a spark) at exactly the optimum moment to ignite the fuel/air mixture. Email Breaker Trader. For any other question use the form below. The contact material of the vacuum circuit breaker should have the following property. contact breaker. The contact material should have low resistance and high density. When this occurs, the collapsing current induces a high voltage in the secondary winding of the coil, which has many more windings. In conclusion, the composite contact material of this invention consisting of a pair of contacts perform the actual duty of making, carrying, and breaking the circuit in a circuit breaker. circuit breaker contact material vacuum circuit vacuum contact Prior art date 1981-12-28 Legal status (The legal status is an assumption and is not a legal conclusion. The tips of fixed contact, moving a contact and arcing horn are coated with copper-tungsten arc-resistant material. This material is less costly than comparable silver graphite materials and exhibits the positive characteristics of both silver graphite and silver tungsten carbide. Then loosen the contact breaker plate locking screws (5) when the point cam (1) is at maximum lift and move the contact breaker point plate (4). Whenever a circuit breaker opens its arcing contacts, some of the contact material melts and some of it vaporizes from the face of the contacts. This causes a very high voltage to appear at the coil output for a short period—enough to arc across the electrodes of a spark plug. A contact material for a vacuum circuit breaker, characterized in that it is composed of copper, molybdenum, niobium, and one or more kinds of low melting point materials. CTI manufactures many other grades and families of materials including, but not limited to, silver molybdenum (AgMo), silver nickel (AgNi), Copper Graphite (CuC), and fine silver. Silver graphite has superior anti-welding characteristics and therefore is a good choice when tack welding is an issue. Its importance is due to the role it is playing. You are invited to challenge CTI with virtually any powder metal material composition. The material used for current carrying contacts plays an important role in the performance of the vacuum circuit breaker. Adjusting material particle sizes, choosing additives, and altering furnace temperatures all play a role in the final properties of the selected contact material. breaker, the stationary contact is a tulip contact made of sliver plated copper contact fingers where two of these contacts are arcing contact fingers made of tungsten. Business Line Contact Materials, Applied Technology 63457 Hanau-Wolfgang, Germany timo.muetzel@eu.umicore.com Abstract—The focus of the studies is on the influence of contact material production parameters, and the contact material - breaker interaction of material combinations used for low voltage protection devices. It is operated within voltage level up to 1 KV. CTI encourages you to discuss your application requirements with a CTI representative as early in the design process as possible. Switch Silver Contact 3. The purpose of the contact breaker is to interrupt the current flowing in the primary winding of the ignition coil. This material satisfies applications requiring both the UL and IEC approval, eliminating the need for two versions of a stationary contact. It contains two pairs of contact. Despite its compact 6¼-in. It is an excellent insulating property and high electro-negativity. It can be understood that, high affinity of absorbing free electron. Advancing the ignition timing helps to prevent pre-ignition (or pinging). length, the CoBolt S provides high cutting power, cutting bolts, nails, and rivets up to 11 / 64 in. The correct gap is 0.012-0.016 in. Switch Silver Contact 6. When this occurs, the collapsing current induces a high voltage in the secondary winding of the coil, which has many more windings. CTI is particularly adept in the manufacture of these materials because of its vast experience in high graphite sliding contacts. The circuit breaker contacts must carry the load current without excessive heating, and must also withstand the heat of the arc produced when interrupting (opening) the circuit. The contact breaker is usually mounted on a plate that is able to rotate relative to the camshaft operating it. The influence of the magnetic blast field and the material composition on erosion behavior and contact resistance of AgW materials will be scrutinized by model-switch tests. AgNi /Cu copper electrical bimetal contact rivet: In low voltage engineering, this contact is widely used in AC switches as an electrical contact. Certificate: ISO9001: 2000 4. In addition to varying the composition, CTI engineers can modify the contact material by changing process parameters. Generally, as the conductive metal (silver or copper) increases, contact resistance decreases and electrical and thermal conductivity increase, but contact erosion and contact "sticking" or welding become more of a concern. A suitable contact material compromise has to be found for each breaker design solution, as already pronounced in [2]. Circuit Breaker Contact Arrangements: Straight-through vs. Blow-apart The flow of electrical energy in a circuit breaker is controlled by a contact assembly. The superior conductivity of the silver combined with the ability of tungsten to withstand mechanical and electrical wear make this the ideal material for use in oxidizing atmospheres and where severe arcing is anticipated. Get best price and read about company. The Rotary Breaker is designed to process feed materials such as coal, alumina, oil sands, aluminum dross and others for further processing. Carbide offer low-cost alternatives to silver tungsten is by far the most popular materials. And is typically paired with AgW, changes in processing will produce varying application results material used for carrying. 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