ABB UFC719AE01 3BHB003041R0101

密度继电器在输入电路内电流的作用下，由机械部件的相对运动产生预定响应的一种继电器。 

它包括直流电磁继电器、交流电磁继电器、磁保持继电器、较化继电器、舌簧继电器,节能功率继电器。 

(1)直流电磁继电器：输入电路中的控制电流为直流的电磁继电器。 

(2)交流电磁继电器：输入电路中的控制电流为交流的电磁继电器。 

(3)磁保持继电器：将磁钢引入磁回路，继电器线圈断电后，继电器的衔铁仍能保持在线圈通电时的状态，具有两个稳定状态。

(4)较化继电器：状态改变取决于输入激励量极性的一种直流继电器。 

(5)舌簧继电器：利用密封在管内，具有触点簧片和衔铁磁路双重作用的舌簧的动作来开、闭或转换线路的继电器。 

(6)节能功率继电器:输入电路中的控制电流为交流的电磁继电器,但它的电流大(一般30-100A),体积小, 节电功能. 

2.固态继电器  abb密度继电器1HSB495663-1

输入、输出功能由电子元件完成而无机械运动部件的一种继电器。 

3.时间继电器 

当加上或除去输入信号时，输出部分需延时或**到规定的时间才闭合或断开其被控线路的继电器。 

4.温度继电器 

当外界温度达到规定值时而动作的继电器. 

5.风速继电器 

当风的速度达到一定值时，被控电路将接通或断开。 

6.加速度继电器 

当运动物体的加速度达到规定值时，被控电路将接通或断开。
Density relay is a type of relay that generates a predetermined response from the relative motion of mechanical components under the action of current in the input circuit.
It includes DC electromagnetic relay, AC electromagnetic relay, magnetic holding relay, comparative relay, tongue spring relay, and energy-saving power relay.
(1) DC electromagnetic relay: An electromagnetic relay in which the control current in the input circuit is DC.
(2) AC electromagnetic relay: An electromagnetic relay in which the control current in the input circuit is AC.
(3) Magnetic retention relay: Introduce magnetic steel into the magnetic circuit, and after the relay coil is powered off, the armature of the relay can still maintain the state when the coil is energized, with two stable states.
(4) Comparison relay: A DC relay whose state changes depending on the polarity of the input excitation quantity.
(5) Tongue spring relay: A relay that uses the action of a tongue spring sealed in a tube, with a dual effect of contact spring and armature magnetic circuit to open, close, or switch circuits.
(6) Energy saving power relay: An electromagnetic relay in which the control current in the input circuit is AC, but it has a large current (usually 30-100A), small size, and energy-saving function
2. Solid state relay abb density relay 1HSB495663-1
A relay whose input and output functions are completed by electronic components without mechanical moving components.
3. Time relay
When adding or removing input signals, the output part needs to delay or * * to the specified time before closing or disconnecting the relay of its controlled circuit.
4. Temperature relay
A relay that operates when the external temperature reaches a specified value
5. Wind speed relay
When the speed of the wind reaches a certain value, the controlled circuit will be connected or disconnected.
6. Acceleration relay
When the acceleration of a moving object reaches the specified value, the controlled circuit will be connected or disconnected.