Ceramic vacuum relay is a ceramic vacuum seal, the contact point of the relay is sealed and isolated from the outside air to obtain a high voltage withstand relay for high voltage, often used in high voltage circuits. The vacuum seal makes the relay less prone to arcing, and under ideal conditions, the vacuum may reach a dielectric strength of 10000V per 0.1 mm. In addition, because there is no air, the contacts in the vacuum will not be oxidized, so the contact resistance of the vacuum-type relay is smaller and more stable. Especially suitable for RF applications. A typical ceramic vacuum relay consists of four basic parts: a sealed interrupter chamber, the contact point is located in the interrupter chamber to achieve the purpose of high-pressure resistance. Armature mechanism that drives the movement of moving contacts. The part of the coil that provides power. Additional parts for easy installation and connection by the user.
Use and Installation:
1. The ceramic vacuum relay in the transfer or assembly process may make the ceramic shell surface adsorb conductive salt and other dirt (such as hand sweat), this dirt will reduce the high voltage performance of the product, and may make the ceramic vacuum relay surface arc or leakage current. Therefore, it is best to keep the ceramic surface clean during use.
2. Avoid the ceramic vacuum relay by impact, impact may make the ceramic vacuum relay leakage, parameter change, failure.
3. Due to the material micro-venting and other reasons, the vacuum ceramic vacuum relay after storage for some time, when the contact is disconnected or the contact is applied to the shell high voltage, may produce a 1-2 small surge current, to avoid this current damage to the coil power supply line, the ceramic vacuum relay installation to ground the shell.
4. Ceramic vacuum relay mainly has two fixing methods, one is flange installation, and the other is thread installation. During installation, be careful not to subject the sealing and connecting parts of the ceramic vacuum relay to transverse or torsional forces.
Application:
1. Rf applications
High-voltage vacuum relays play a vital role in applications that require high energy and low RF losses. Including vapor deposition during semiconductor chip processing, radio antenna conditioning matching loop, T/R (transmit/receive) conversion, pulse formation network, ion input, TWT (traveling wave tube) power supply, MRI (nuclear magnetic resonance imaging) power supply, radar system, safety inspection system, etc.
2. DC or AC Power Switch Applications
Including intrinsic safety, explosion-proof applications, battery power systems, power and battery backup systems, solar and other similar power systems, and industrial DC power switches.
3. Test Equipment and Instruments
ESD (electrostatic discharge) pulse test equipment, Hi-POT (high voltage) test, cable test, motor winding test, insulation test, high energy laser, power supply test, mass spectrometer, high voltage power supply, transformer test equipment, Ballast Test Equipment.
4. Special Applications
Airport light system, submarine power distribution, earth science drilling data acquisition, scientific instruments, sine pacemaker.