Time Relay
Your professional time relay supplier
Your professional time relay supplier
Zhejiang QIANJI Relay Co., Ltd. is a top relay production supplier in China. We specialize in producing various types of relays, including power relays, PCB relays, automotive relays, and dozens of other types
Quality assurance
Our relays are equipped with professional testing equipment to strictly control quality. And the product quality has passed the European and American CE certification.
Professional technical team
We have been engaged in foreign trade export production of relays for over 20 years and have cooperated with over 200 countries. Our professional salesperson provides you with reliable consulting services and procurement related matters
ODM customization services
We provide professional ODM customization services, which can be set to the pattern you want on the product. And provide free samples for your reference
Widely applicable
We provide professional relay solutions to cater to different industries, such as automation equipment, household appliances, and automotive relay control
-
![Adjustable Time Delay Relays]()
Adjustable Time Delay RelaysOur Adjustable Time Delay Relays provide a programmable and highly adaptable solution for precise timing control in industrial automation, motor control, and process applications.read more -
![Industrial Time Delay Relays]()
Industrial Time Delay RelaysOur industrial time delay relays are engineered to deliver dependable timing control solutions tailored for industrial automation and control panel applicationsread more -
![12v Timer Relay Switch]()
12v Timer Relay SwitchThis 12v timing relay switch is an electrical mechanism that regulates the flow of current in the circuit. Timed relay control has the effect of controlling time, and today's electronic world...read more -
![12 Volt Timer Relay]()
12 Volt Timer RelayOur 12v timing relay has precise time accuracy and can be designed with different time ranges, which is very beneficial for ensuring the safety of our circuit. And we will also offer significant...read more -
![Power Time Delay Relays]()
Power Time Delay RelaysPower Time Delay Relays are advanced electronic control switch devices that can perform power on or off operations based on preset time delays. This type of relay is commonly used in circuits that...read more -
![High Precision Delay Relays]()
High Precision Delay RelaysHigh precision delay relays are generally suitable for timing control. And it is equipped with LED indicator lights, with a rated power consumption of 1W and a weight of about 50g. The volume is...read more -
![Electronic Range 8-Pin Relay]()
Electronic Range 8-Pin RelayElectronic range 8-pin relay DC 24V delay relay solid-state timer 30S DPDT with socket. Equipped with LED light to display the action status. Suitable for general time control. And the accuracy is...read more -
![8-Pin Power Delay Relay]()
8-Pin Power Delay Relay8-pin power delay relay, generally suitable for timing control. And it is equipped with LED indicator lights and various contact forms, with a rated power consumption of 1W and a weight of about...read more -
![Small Time Counting Relay]()
Small Time Counting RelaySmall time counting relay. Supply voltage: DC 12V; Contact Capacity: 240VAC 5A; Rated time Range: 0~60s. Perfect work for the industrial automation system and mechanical equipment to delay component.read more
A time relay is a type of device that can control power flow in a circuit by using an electromagnet. The device includes a coil of wire that is wrapped around an iron core. When power flows through the circuit, it creates a magnetic field in the electromagnet. This magnetic field can attract or repel another magnet attached to a timer relay switch inside the device. The time relay will allow you to control when this happens by controlling how long the current flows through its coils before stopping.
Electromagnetism is the timer relay working principle. One relay coil is always on, while the other can be turned off and on with an electric signal sent through it from a control device such as a phone or computer system. The "on" coil receives power all the time, making it ready to activate at a moment's notice.
The "off" coil only receives power when the device is activated, and then it works to pull in an armature that activates the other end of the circuit where electricity flows. When the power is turned off, this armature pulls back to its original position and no longer allows electricity to flow through the circuit.
Delayed Start
Timer relays in motor controls have a primary purpose to enable a delayed start. In situations where it's necessary for a motor to experience a brief delay before activation, these timer relays prove invaluable. This delay plays a crucial role in allowing other companies to stabilize or ensure safety measures are met.
Control of Time-Critical Operations
Timer relays ensure accurate operations for specific duration in various applications. For instance, conveyor systems, they can effectively control the duration of product exposure to a particular process.
Safety Measures
Timer relays play a crucial role in enhancing safety in motor control systems. They are utilized to introduce a time delay before shutting down a motor in the event of an emergency or fault detection. This delay creates a critical window for implementing necessary corrective actions.
Preventing Motor Overloads
Motor overloads can cause damage and result in downtime. To prevent overheating and extend the motor's lifespan, one effective solution is the use of timer relays. These relays enable the implementation of cool-down periods between motor cycles. By allowing sufficient time for cooling down, the risk of overheating is minimized, which ultimately improves both the
Sequential Control
In complex motor control systems, where numerous operations need to occur sequentially, timer relays play a crucial role in coordinating the timing of these actions. This coordination ensures seamless alignment between each step in the process and the subsequent one.
Advantages of Time Relay
Time delay relays offer several benefits that make them popular in various applications. Here are some of the key advantages of using time delay relays:
Precise Control
Time delay relays allow you to precisely regulate the timing of events in a circuit. This is especially important in applications such as industrial control and security systems. With precise control, systems can operate efficiently and effectively.
Increased Safety
Time delay relays can increase safety in systems. They can offer a delay between a machine's activation and operation, allowing personnel to move to a safe distance and helping avoid accidents and injuries.
Energy Savings
Using a time delay relay can minimize energy usage by managing the activation schedule of equipment. For example, they can automatically switch off lights after a defined time, decreasing energy consumption in locations where lights are kept on unnecessarily. This can lower the energy consumption and the environmental impact of industrial systems, making them more sustainable.
Reduced Maintenance
Time delay relays can reduce maintenance requirements by delaying the activation of equipment and its operation. They also help protect equipment from harm if it is started or stopped too abruptly. As a result, equipment lifespan can be prolonged, and repair expenses will decrease.
Increased Efficiency
Systems can function more smoothly and efficiently if the order of operations is optimized. For example, time delay relays can be used to arrange equipment, ensuring that each component runs at the correct time and in the correct sequence. This results in decreased downtime and enhanced performance, improving total system efficiency.
Cost Savings
Providing precise control over the timing of operations can make time delay relays reduce costs associated with system failures or downtime. They can also reduce energy consumption, leading to lower utility bills.
Types of Time Relay
ON-Delay Timers
An ON-delay timer is a type of time delay relay used to control the activation of a circuit by delaying the initiation of current flow. ON-delay timers are typically used in applications where it is important to ensure that a circuit is not activated until after a certain amount of time has elapsed. This can help prevent accidental circuit activation or allow time for a system to stabilize before it is activated.
OFF-Delay Timers
OFF-delay timers are a type of time delay relay that opens or closes the circuit as soon as power is removed. The contacts will not return to their normal position until the preset time delay has elapsed, at which point the load is de-energized. OFF-delay timers are often referred to as "delay on break" timers. If you were to close the control switch again during timing, it would reset the time delay; however, most OFF-delay timers automatically reset when power is lost, but some models allow for manual resetting.
One Shot Timers
One-shot timers are a time delay relay used to activate a circuit after a set amount of time has passed. They are also called single shot timers, single shot interval timers, and single pulse timers. One-shot timers are activated by power. As soon as power is applied, the contacts move to a different position. They stay in this new position for the time previously set and then return to their original spot. The timer starts over when the previous cycle is completed, and the switch controlling it is turned off. One-shot timers are often used in industrial settings, such as operating machinery start/stop buttons.
Interval Timers
Interval timers are a time delay relay used to control the length of time an electrical load is energized. They are also called pulse shaping timers, bypass timing timers, interval delay timers, and delay on energization with instantaneous transfer timers. These kinds of timers work by delaying the application of power to an electrical load until a specific time has elapsed. Once the timer has elapsed, the power is applied and remains on until the timer expires. At this point, power is removed from the load and remains off until power is reapplied.
Recycle Timers
Recycle timers are a type of time delay relay used to control a load's on and off cycling. They are also called duty cycling or cycle timers. These timers conserve energy by turning a load off and on at regular intervals. They can also be used to create a flashing effect. Recycle timers are either single-function or multi-function devices.
Application of Time Relay
Time delay relays are very flexible and can be used for almost any purpose you need. Some typical applications of the time delay relay include:
You can control a power outlet by using two relays to turn the flow of electricity on and off. One relay controls "On" when you are plugging something into the outlet, while another turns it off after whatever is plugged in finishes charging or powering whatever device is plugged in.
One very common use for a relay with a timer is turning lights on and off. The process works by turning the relay's coil on for a certain amount of time to activate it before stopping power flow so that lights can turn off again after they have been activated. This is perfect if you want your lights to go out automatically when no one is in the room!
Many types of machines are controlled by electricity so that the time delay relay can be used for this purpose. You could control a machine on your house like an air conditioning system, heater, or home theater system without walking across their living room. There are endless possibilities for what kind of automation you can do with the time delay relay.
These devices are often found in high-performance applications such as robotics or machinery that require precision timing operations. Some examples include using them to activate valves in pneumatic cylinders, controlling timers on coffee makers, lighting systems at airports & train stations, and even powering up security cameras.
How to Test a Time Relay
If you're trying to test a time delay relay, there's an easy way to do it. First of all, make sure the device is turned off and unplugged from its power source. Then get an electric probe or any electrical testing tool that has two metal ends (one small & one large) so that both can touch at once inside of your circuit board. You'll want to connect these probes where each end should go into either side of the "on" coil on the time delay relay (the larger probe should be connected in between).
When doing this correctly, you will see a back EMF when electricity flows through wires and other conducting materials like metals. This shows up as a temporary reverse flow of electricity when you move your probe from one coil to the other. If it does not show up, then this means that your time delay relay is either defective or has a broken wire in its circuit board somewhere.
You can also use a multimeter to check for continuity between each side of the "on" coil and ground (which should be represented by two probes touching at once). You will hear an audible sound if there's no breakage within the device itself when doing so. You can test each connection on both sides until you find where it breaks to determine what needs fixing! This method works just as well with regular relays, too – even though they don't have coils like these do, their internal switches still have to be connected properly for the device to work.
When working with time delay relays, it's essential to test them correctly to work correctly. You can do this by using an electric probe and multimeter to test the device's internal connections. This helps you find a break in your circuit board, which would be necessary for fixing if it were broken or defective.
If you're trying to test a time delay relay, there's an easy way to do it. First of all, make sure the device is turned off and unplugged from its power source. Then get an electric probe or any electrical testing tool that has two metal ends (one small & one large) so that both can touch at once inside of your circuit board. You'll want to connect these probes where each end should go into either side of the "on" coil on the time delay relay (the larger probe should be connected in between).
When doing this correctly, you will see a back EMF when electricity flows through wires and other conducting materials like metals. This shows up as a temporary reverse flow of electricity when you move your probe from one coil to the other. If it does not show up, then this means that your time delay relay is either defective or has a broken wire in its circuit board somewhere.
You can also use a multimeter to check for continuity between each side of the "on" coil and ground (which should be represented by two probes touching at once). You will hear an audible sound if there's no breakage within the device itself when doing so. You can test each connection on both sides until you find where it breaks to determine what needs fixing! This method works just as well with regular relays, too – even though they don't have coils like these do, their internal switches still have to be connected properly for the device to work.
When working with time delay relays, it's essential to test them correctly to work correctly. You can do this by using an electric probe and multimeter to test the device's internal connections. This helps you find a break in your circuit board, which would be necessary for fixing if it were broken or defective.
Timer Relay Using Instructions
General Ideas
- Keep the time relay clean, otherwise, the error will increase.
- Before use, check whether the power supply voltage and frequency are consistent with the voltage and frequency of the time relay.
- Choose the control time of the time relay according to user requirements. Regardless of the type of time relay, as long as the timing time is equal to the set time, its output contacts will act to achieve the purpose of the timing control circuit.
- For DC products, pay attention to wiring according to the circuit diagram and pay attention to the polarity of the power supply.
- After the time relay is out of working state, it should be reset immediately for the next use. If the repeated use interval is less than the preset time, the control circuit will be abnormal. What's more, the power-on delay type is automatically reset after power off; and the power-off delay type is automatically reset after power on.
- Try to avoid using it in places with obvious vibration, direct sunlight, humidity and soil contact.
Two Points for Attention in Using Time Relays
- Three Key Points
1) Starting point of timing
On one hand, when selecting the timing point of the power-on delay time relay, you should choose to supply power to the time relay when the timing signal is sent by the control circuit that needs to perform timing. On the other hand, when selecting the timing point of the power-off delay type time relay, you should choose to cut off the power supply of the time relay when the control circuit that needs to send out the timing signal, so that the timing can be performed.
2) Ending point of timing
The timing endpoint has two meanings: one refers to the point at which the set time is equal to the timing time; the other refers to the point at which the contract operates.
3) Reset point of timing
The reset of the time relay is to clear the last timing content for the next use. If it is not reset, an abnormality will occur the next time it is used. Special attention should be paid to: the interval between two uses should be greater than the reset time, which is particularly important in electric time relays.
- The Relationship between the Starting Point, Ending Point and Reset Point of Timing
1) After the time relay is used, there is a reset problem. Therefore, most of the control circuits are in the next level circuit by the time relay output. After the timing completion signal is accurately obtained, it is used to cut off the power supply of the time relay (power-on delay type), or power the time relay (power-off delay type).
2) In the upper and lower control circuits of the time relay, there are components that cannot work at the same time. If the time relay cannot accurately operate the upper and lower control circuits at these points, it will cause the device to operate abnormally.
Factors to Consider When Selecting Time Relay
Selecting the most appropriate time delay relay for a particular application involves several factors to keep in mind:
Desired Delay Time
Delays can range from milliseconds to hours or even days, depending on the relay. Therefore, selecting a relay that can give the required delay time for the specific application is critical.
Load Current and Voltage
Choosing a time delay relay rated for the correct load current and voltage is important to ensure the safe and reliable operation of the system. Failure to do so can damage the relay or the equipment it controls or even create a safety hazard.
Load Type
Different loads — such as motors, lamps, and heaters — have other characteristics that can affect the selection of the appropriate time delay relay. For example, an engine may require a relay with a specific timing circuit to ensure proper starting and stopping.
Environmental Factors
Temperature, humidity, and vibration can all impact the functioning of time delay relays. It can lead to premature failure if not considered during the selection process. Therefore, choosing a relay built to work in the application's unique environmental circumstances is necessary.
Contact Arrangement
Some relays have normally open (NO) contacts, normally closed (NC) contacts, or both. Considering this is important because different arrangements are suitable for various applications. For example, an NO contact arrangement is ideal for applications where the relay interrupts power to a load. However, the NC contact arrangement is best when the relay needs to complete a circuit to activate a load.
Mounting and Wiring
Mounting and wiring should be carefully considered when using time delay relays to ensure they are installed and connected correctly. Proper mounting and wiring can help prevent electrical interference, circuit shorts, and equipment damage.
Our Factory
The new factory covers an area of more than 8,000 square meters and a construction area of more than 15,000 square meters. With its absolute advantages in product quality and performance, the company has become a leader in the relay industry.
Professional team
Over 20 years of manufacturing and production of relays,
exported to over 200 countries and regions, with rich experience
Rest assured service
Professional consulting services to solve product selection issues.
Excellent quality received excellent feedback from customers
8000㎡
Factory area
100000+
Monthly production volume
2298
Annual orders
100%
Customer review rate
Certifications
Certificate obtained by QIANJI Relay Co., Ltd. in Zhejiang, China
Certificate name
Certificate name
Certificate name
Certificate name
Certificate name
Certificate name
Common Problems of Time Relay
As one of the leading time relay manufacturers and suppliers in China, we warmly welcome you to buy high-grade time relay in stock here from our factory. All our products are with high quality and low price.
Small Time Counting Relay, High Precision Delay Relays, Time Relay