How are time relays classified? How many types are there?

Time controller is a common electrical control component that can control the switch state of a circuit for a certain period of time. Time controllers are typically used for circuits that must delay starting or stopping, such as motor starting, lighting control, etc. If you are interested in the content to be covered, please continue reading the following content, hoping it can be helpful to you.

Time controllers can be divided into the following types:

1. Electronic time controller

Electronic time controller is an electromagnetic valve that uses electronic components to complete the time delay function. It has the advantages of high accuracy, good stability, small size, and low power consumption, and is widely used in industrial automation, aerospace engineering, communication and other fields. Electronic time controllers are usually controlled by digital circuits or microprocessors, which can achieve various time delays and accuracy adjustments.

2. Foot operated time controller

A foot operated time controller is an electromagnetic valve that utilizes a mechanical system to complete the time delay function. It has the advantages of compact structure, low cost, and high stability, and is widely used in fields such as household appliances, automotive electronics, and power supply systems. Foot operated time controllers generally use mechanical systems such as torsion springs, gears, and cams, but their accuracy is low and the time period is very limited.

3. Optoelectronic time controller

The photoelectric time controller is an electromagnetic valve that uses photoelectric sensors to complete the time delay function. It has the characteristics of strong anti-interference, fast response speed, and strong durability, and is widely used in power supply systems, safety monitoring, medical equipment, and other fields. Optoelectronic time controllers generally use optoelectronic components such as optocouplers and photodiodes to achieve time delay, but their accuracy is low and they are greatly affected by environmental light.

4. Oil pressure time controller

The oil pressure time controller is an electromagnetic valve that has the function of delaying the completion time of hydraulic components. It has characteristics such as heat resistance, corrosion resistance, and high pressure, and is widely used in fields such as aerospace engineering, shipbuilding, and petrochemical. Oil pressure time controllers generally use hydraulic components such as gate valves and cylinders to achieve time delays, but their accuracy is low and maintenance costs are high.

Common classification methods:

1. Classify according to working principles

According to the working principle of time controllers, they can be divided into foot time controllers and electronic time relays. The foot time controller is controlled by a mechanical system and generally consists of a mechanical clock, a mechanical timer, etc; The electronic time controller is controlled by electronic components and generally consists of transistors, integrated circuits, etc.

2. Classification based on time parameters

According to the time parameters of the time controller, it can be divided into delay solenoid valve, power outage maintenance time controller, cycle timer, etc. Delay solenoid valve refers to the circuit that is disconnected after a certain delay after the control command disappears; Power outage maintenance time controller refers to disconnecting the circuit after the control command disappears; A loop timer refers to the on/off state of a loop control circuit.

3. Classification by rated current and rated voltage

The rated voltage and rated voltage of the time controller can be divided into different models and specifications. Different models and specifications of time controllers are suitable for different circuits and loads, and should be selected according to actual needs.

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