中间继电器用于继电保护与自动控制系统中，以增加触点的数量及容量，还被用于在控制电路中传递中间信号。下面进行中间继电器的分类作用全解析。

Intermediate relays are used in relay protection and automatic control systems to increase the number and capacity of contacts. They are also used to transmit intermediate signals in control circuits. The following is a full analysis of the classification and function of intermediate relays.

中间继电器分类

Intermediate relay classification

中间继电器的延时方式主要有两种，分别是通电延时和断电延时，安装方式主要分为固定式、凸出式、嵌入式、导轨式。它一般是没有主触点的，因为过载能力比较小。所以它用的全部都是辅助触头，数量比较多。按结构形式的来说的话有电磁继电器与静态继电器两个大类：

There are two main delay modes of intermediate relay, namely power on delay and power-off delay. The installation modes are mainly divided into fixed type, protruding type, embedded type and guide rail type. It generally has no main contact, because the overload capacity is relatively small. Therefore, all auxiliary contacts are used, and the number is relatively large. According to the structure, there are two categories: electromagnetic relay and static relay:

静态集成电路式中间继电器，采用的是集成电路原理结构，具有良好的抗振动，适用于各种电力继电保护和自动控制装置中，以增加保护和控制葫芦的触点容量和触点数量。静态式中间继电器由电子元器件和精密小型继电器等构成，是电力系列中间继电器更新换代首选产品。

Static integrated circuit type intermediate relay adopts the principle structure of integrated circuit and has good anti vibration. It is suitable for various power relay protection and automatic control devices to increase the contact capacity and number of protection and control hoists. Static intermediate relay is composed of electronic components and precision small relay. It is the preferred product for the renewal of power series intermediate relay.

电磁型中间继电器是传统的老式继电器，只要在线圈两端加上一定的电压，线圈中就会流过一定的电流，从而产生电磁效应，衔铁就会在电磁力吸引的作用下克服返回弹簧的拉力吸向铁芯，从而带动衔铁的动触点与静触点吸合。

Electromagnetic intermediate relay is a traditional old relay. As long as a certain voltage is applied at both ends of the coil, a certain current will flow through the coil, resulting in electromagnetic effect. Under the action of electromagnetic force, the armature will overcome the tension of the return spring and attract to the iron core, so as to drive the dynamic contact and static contact of the armature to pull in.

中间继电器作用

Intermediate relay action

在工业控制线路和现在的家用电器控制线路中，常常会有中间继电器存在，对于不同的控制线路，中间继电器的作用有所不同，其在线路中的作用常见的有以下几种。

Intermediate relays often exist in industrial control circuits and current household appliance control circuits. For different control circuits, the functions of intermediate relays are different. The common functions of intermediate relays in circuits are as follows.

中间继电器的触点具有一定的带负荷能力，当负载容量比较小时，可以用来替代小型接触器使用，比如电动卷闸门和一些小家电的控制。这样不仅可以起到控制的目的，而且可以节省空间，使电器的控制部分做得比较精致。

The contact of the intermediate relay has a certain load capacity. When the load capacity is relatively small, it can be used to replace small contactors, such as the control of electric rolling gate and some small household appliances. This can not only achieve the purpose of control, but also save space and make the control part of electrical appliances more exquisite.

在电路控制系统中，线路中增加一个中间继电器，不仅不会改变控制形式、增加接点数量，而且便于维修。

In the circuit control system, adding an intermediate relay in the circuit will not change the control form and increase the number of contacts, but also facilitate maintenance.

中间继电器的接点容量虽然不是很大，但也具有一定的带负载能力，同时其驱动所需要的电流又很小，因此可以用中间继电器来扩大接点容量。而在控制线路中使用中间继电器，通过中间继电器来控制其他负载，达到扩大控制容量的目的。

Although the contact capacity of the intermediate relay is not very large, it also has a certain load capacity, and the current required for its driving is very small. Therefore, the intermediate relay can be used to expand the contact capacity. The intermediate relay is used in the control circuit to control other loads through the intermediate relay, so as to expand the control capacity.

ABB中间继电器价格人员提醒您，在工业控制线路中，可以将一个中间继电器与原来的接触器线圈并联，用中间继电器的常闭接点去控制相应的元件，转换一下接点类型，可以实现需要使用接触器的常闭接点才能达到控制目的。

ABB intermediate relay price personnel remind you that in the industrial control circuit, an intermediate relay can be connected in parallel with the original contactor coil, and the normally closed contact of the intermediate relay can be used to control the corresponding components. By changing the contact type, the normally closed contact of the contactor can be used to achieve the control purpose.

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