Vacuum relay

Vacuum relay is a kind of electronic equipment that uses vacuum tube as the control element. It has unique working principle and remarkable characteristics, and is widely used in various circuits.

Category: Vacuum relay

key word : Vacuum relay

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Product Details

The vacuum relay is an automatic switch that works in a vacuum environment. It can connect or disconnect the circuit according to the pressure of the gas in the vacuum device. The main features of this relay include high withstand voltage, fast arc extinguishing, large breaking current, small size, light weight and long life. They are widely used in various vacuum devices that require automatic control, such as cardiac pacemakers, nuclear magnetic resonance imaging, high-frequency antenna coupling devices, radar, capacitor discharge and other weak current control strong current fields.

Definition and Structure

Definition: A vacuum relay is an electrical device that uses a vacuum tube to achieve current switch control. It is mainly composed of vacuum tubes, control circuits, contacts and springs.

Structure: The vacuum tube is the core part of the vacuum relay and consists of a vacuum gap between two electrodes. The contact is responsible for opening and closing the circuit, and the spring plays the role of restoring the initial state of the contact.

　　Working principle

The working principle of the vacuum relay is that the gap between the cathode and the grid forms a segmented charge barrier through the excitation contact in the control circuit. When a sufficient reverse bias occurs across the gap, a corona discharge is induced between the cathode and anode, turning the vacuum tube on. This process is similar to the principle that the electric shock mechanism of an ordinary relay converts the energy stored in the coil into a magnetic field.

　　Features

High reliability: Due to the good insulation characteristics and stability of the vacuum space, the vacuum relay has the advantages of high reliability and long life.

Excellent electrical performance: vacuum relay has the characteristics of high breakdown voltage, fast arc extinguishing, large breaking current, small size and light weight. For example, vacuum has ideal insulating properties, and under ideal conditions may reach a dielectric constant of 80,000 v/mm.

Strong environmental adaptability: the vacuum relay is not affected by the air pressure, moisture, dust or explosive gas in the surrounding environment, and is suitable for working in harsh environments.

Wide range of applications: Vacuum relays are widely used in communications, electric power, automobiles, aircraft and other fields, especially in the field of cardiac pacemakers, nuclear magnetic resonance imaging, high-frequency antenna coupling devices, radar, capacitor discharge and other weak current control strong current.

　　Application

Control function: The vacuum relay is mainly used in the control of various circuits, such as carrying and controlling the signal in the small current weak control circuit, and realizing the switching and protection of various functions.

Special applications: Vacuum relays are especially suitable for special applications such as frequency converters, power automation, gas separation, battery charging and discharging.

In summary, vacuum relays have been widely used in the field of industrial automation control and other fields due to their unique working principle, excellent electrical performance and environmental adaptability.

Typical vacuum relays are named as follows:

JPK-2/009

J: relay p: high frequency k: vacuum 2: model number 009: specification number (the last three digits of the product drawing number)

Directory

Serial Number	Product Model	Serial Number	Product Model	Serial Number	Product Model
1	JPK-3/002 type vacuum relay	8	JPK-2/009/054 type vacuum relay	15	JPK-31/065B type vacuum relay
2	JPK-4/003 type vacuum relay	9	JPK-6/055/055A type vacuum relay	16	JPK-31/067 type vacuum relay
3	JPK-5/004 type vacuum relay	10	JPK-23/059, JPK-2/061 type vacuum relay	17	JPK-31/067A vacuum relay
4	PK-7/005 type vacuum relay	11	K-2/057/062 vacuum relay	18	JPK-33/069(k) type vacuum relay
5	JPK-11/008 type vacuum relay	12	JPK-2/063, JPK-23/063A type vacuum relay	19	JPK-35/073A type vacuum relay
6	JPK-10 type vacuum relay	13	JPK-31/065 type vacuum relay	20	JPK-35/073(H) type vacuum relay
7	JPK-13/013 type vacuum relay	14	JPK-31/065A type vacuum relay	21	JPK-36/074 type vacuum relay