Correctly recognizes the graphical symbol of the time relay - News - Global IC Trade Starts Here Free Join
The time relay is an important component in the electrical control system. Generally divided into two types of power-on delay and power-down delay. The graphical symbols of the time relay are easily disturbed when drawing and identifying electrical schematics. In particular, the time-delay contacts of the time relay are generally undeterminable when in use. The text symbol of the time relay is KT
First, the time relay coil graphic symbol time relay is divided into power-on delay and power-off delay, Figure 1 is the power-on delay coil graphic symbol, Figure 2 is the power-off delay coil graphic symbol.
Figure 1 power-on delay 
Figure 2 power off delay Second, the time relay contact graphic symbol time relay to get the contact graphic symbol is mainly the opening of the semi-circular symbol of the contact, the principle is: the semi-circular opening direction is the direction of the contact delay action. Figure 3 is a graphical representation of the various contacts of the power-on delay.
Normally open contact normally closed contact Figure 3 Various contact graphic symbols for power-on delay Figure 4 is a graphical representation of the various contacts of the power-down delay.
Normally open contact normally closed contact Figure 4 Various contact graphic symbols for power failure delay Ceramic capacitor (ceramic capacitor);Ceramic condenser) is also known as porcelain capacitor or monolithic capacitors.As the name implies, ceramic dielectric vessel is a ceramic capacitor with dielectric material.According to different ceramic materials, this kind of capacitor can be divided into low-frequency porcelain dielectric vessel with capacity of 1-300 pF and high-frequency porcelain dielectric vessel with capacity of 300-22 000 pF.According to the structure type classification, can be divided into picture capacitor, tubular capacitor, rectangular capacitor, chip capacitor, piercing capacitor and so on.
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