The electric contacts pressure gauge, electric contact is often the first contact is damaged, burned, the general use of the electrical contacts to control AC contactor, there is no way to prolong the service life, add a damping absorption of the original electric contacts at both ends can be? What should I do?
1. The pressure gauge with live contacts prolongs the service life, which can be improved from the following aspects(1) in the case of permission, try to adjust the upper and lower limits as much as possible.(2) the fluctuation of the pressure indication shall be increased by adding damping on the pressure taking pipe, that is, increasing the buffering, such as installing an annular tube and properly closing a small valve.(3) to reduce the current through the electric contact, the effective method is to connect the electric circuit through the electronic amplifying circuit (using triode and IC) to drive the relay.(4) reduce the power supply voltage of the electric contact; of course, the related relays have to be exchanged. The RC spark suppression element is connected to the electric contact.2, the electrical contact is the switch point in the circuit ---- break and close. Usually, the circuit device can be provided with 1, 2, 3 and 4 electrical contacts. For 1 normally open, 1 open and close, 2 normally open, 2 open and close, and so on.3, pressure is the physical pressure, that is, the size of the unit area to bear the pressure. Gauges based on atmospheric pressure are used to measure instruments that are less than or greater than atmospheric pressure, and gauges used to measure the pressure of a fluid (gas, liquid) are called pressure gauges. The pressure gauge through the sensitive element in the table (Bourdon tube, bellows, bellows) of the elastic deformation, then the conversion mechanism of table movement will transfer to the pointer pressure distortion caused by pointer rotation to show pressure.
Although the contact points of an electric contact meter can be directly used for AC 380 V voltage, it is easy to burn out. In daily design, the 24 volt DC power supply is used to switch the DC relay, so that the contact life can be prolonged. 24 V DC power is also a contactor price.
1, the electric contact pressure gauge in the allowable conditions, as far as possible can make the upper and lower limit a little larger.2, the electric contact pressure gauge on the pressure indicator fluctuations, that is, should be in the pressure pipe to increase damping, that is, increase the buffer, such as the installation of ring pipe, properly close the small valve.3, the electric contact pressure meter reduces the current through the electric contact, the effective method is the electrical connection point through the electronic amplifying circuit (uses the triode, IC) to drive the relay.4, the electric contact pressure meter reduces the power supply voltage of the electric contact, of course, the related relay also needs to be exchanged. The RC spark suppression element is connected to the electric contact.5, the electric contact pressure gauge uses the magnetic auxiliary type electric contact pressure gauge.6, electric contact pressure gauge is through magnetic force auxiliary contact torque increases the electrical contact, has relatively high electric contact pressure gauge contact power, because the magnetic effect on the electric contact pressure gauge can increase the contact force, accelerate the speed and make contact contact, reliable contact, can eliminate the arc, can avoid contact monometers due to frequent action of vibration or medium pressure fluctuations caused by contact.
