5results about How to "Shorten the arcing time" patented technology

According to the relay, when a first contact part and a second contact part are separated from each other or make contact with each other to generate an electric arc, a magnetic field formed by a first permanent magnet can play a traction role on the electric arc, and the arc blowing and arc discharging effects are achieved. The electric arc moves along the contact surface, and when the electric arc moves to the arc isolating groove, the arc isolating groove can play a role in isolating, lengthening and blocking the electric arc, so that the arcing time is shortened. Therefore, the defects that the electric arc ablates the inner cavity and causes relay explosion and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the product failure probability can be reduced. And meanwhile, the first contact part is synchronously contacted with the at least two sheet units, and the first contact part and the second contact part have at least two contact points, so that the shunting effect is achieved, the contact resistance can be reduced, the contact stability and reliability can be improved, and the temperature rise can be reduced.

The application relates to an electromagnetic relay, which comprises a main contact part and a permanent magnet. A magnetic circuit part comprises an armature. The main contact part comprises a main static spring assembly and a main dynamic spring assembly. The main static spring assembly comprises a main static spring piece and a main static contact point arranged on the main static spring piece. The main dynamic spring assembly comprises a main dynamic spring piece and a main dynamic contact point arranged on the main dynamic spring piece. The main static contact point is arranged opposite to the main dynamic contact point. The permanent magnet is arranged on the side of the main static contact point away from the main dynamic contact point or on the side of the main dynamic contact point away from the main static contact point. The permanent magnet can form a longitudinal magnetic field between the main static contact point and the main dynamic contact point. Through longitudinal arc blowing, the electromagnetic relay can effectively reduce the burning loss of the main static contact and the main dynamic contact by an arc, shorten the arc burning time, and thus improve the electrical endurance and reliability of the electromagnetic relay.

The invention relates to the technical field of circuit protection devices, in particular to a double-layer arc-extinguishing flat plate type fuse which comprises an insulating shell, a melt and a composite arc-extinguishing core, the melt is provided with a center fusing area and a terminal area which are integrally formed, and the composite arc-extinguishing core is arranged in the insulating shell and surrounds the center fusing area. A first arc extinguishing cavity for accommodating a gas production material is formed in the first arc extinguishing chamber to form a first arc extinguishing layer; and a second arc extinguishing cavity filled with an arc extinguishing medium is formed between the insulating shell and the composite arc extinguishing core body to form a second arc extinguishing layer. According to the invention, during breaking, high-pressure airflow can be quickly generated to suppress electric arcs in a segmented manner, and continuous cooling and insulation are realized by an external medium, so that the arcing time is greatly shortened, the internal pressure is effectively controlled, the shell is prevented from bursting, and the breaking capacity, safety and reliability of high-voltage and large-current faults are remarkably improved.

This invention discloses a rotary multi-contact isolating switch, comprising an operating part, a positioning part, a switching part, and a driving part. The operating part includes an upper housing, a handle, and a rotating shaft. The positioning part includes a positioning housing, a positioning gear, and a telescopic positioning assembly. The positioning gear is fixed to the bottom end of the rotating shaft, and the telescopic positioning assembly cooperates with the positioning gear to achieve position locking. The switching part includes a lower housing, a stationary contact, and a moving contact assembly, with the moving contact assembly slidably installed within the lower housing. The driving part includes a driven ring and a connecting shaft. The connecting shaft transmits the rotational motion of the rotating shaft to the driven ring, which drives the moving contact assembly to quickly disconnect from the stationary contact. This invention achieves accelerated disconnection of the moving and stationary contacts through the cooperation of the driven ring and the contact support block, effectively shortening the arcing time. The moving contact assembly adopts a double-spring structure, separating the contact pressure of the raised driven wheel from the contact pressure of the contact point, improving the contact stability and vibration resistance reliability during long-term operation. The overall structure is stable and highly reliable.

The utility model relates to a relay. At least one of the outer side part of a first contact part and the outer side part of a second contact part is provided with a first avoiding part for avoiding each other. When the first contact part and the second contact part are separated from each other or are in contact with each other so that an electric arc is generated at the contact unit, a magnetic field formed by the first permanent magnet can play a traction role on the electric arc, and arc blowing and arc discharge effects are achieved. The electric arc moves along the contact surface of the contact unit, when the electric arc moves to the first avoiding part, the first avoiding part can play a role in separating, lengthening and blocking the electric arc, and the arcing time is shortened. Besides, the first avoiding part is arranged according to the magnetic blow-out path, so that the positions of the first contact part and the second contact part are relatively controllable, meanwhile, the contact area is relatively small, the position of an arcing point is more controlled, and the arc isolation effect is obvious. Besides, the defects that the inner cavity is ablated by an electric arc and the relay explodes and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the failure probability of the product can be reduced.