How to connect an intermediate relay?
Ways to turn on the device
How to connect the mechanism to the system? The device is connected to the electric circuit in two ways:
- Parallel connected. With this method, the devices are the main output and high-speed. For the latter, the response time is 0.02 seconds. As a rule, the mechanism has a standard response time between 0.02 and 0.1 second.
- Serially connected. It is used in cases of instant short-term operation.
When there is a normal stable voltage of the power supply, then intermediate relay should work reliably. In addition, their reliable operation is provided in case of an emergency voltage drop to 40-60%. Especially in the design, such a conversion element can be with one winding, two or three (the latter are extremely rare).
Connecting an intermediate relay is important for any equipment or device. After all, this allows not only to automatically interrupt the circuit, but also with its help it is possible to expand the functional capabilities of other relays that are located in this electrical circuit.
The durability of the device depends on the amount of its operation. That is, it is characterized by the number of response cycles and a return to its original position. The degree of protection of the equipment from various undesirable factors that surround the structure is evaluated by such a criterion as the time the contacts move from one position to another.
Wiring diagrams
After the intermediate relay has been installed in the electrical cabinet, it should be connected to the electrical circuit. For this, the contacts of the coil itself and direct contact elements are used. The relay has, as a rule, several pairs of contacts NO normally open and NC normally closed. The normal situation is the absence of a signal to the coil. Since the coil does not have polarity, the connection of the contacts is arbitrary.
Such a device is installed in control and automation circuits. Located between the actuator (e.g. contactor) and the job source. The figure shows the electrical circuit of the device:
The picture shows an intermediate relay without voltage. If you submit it, then the contacts will switch. The voltage in the coil can be different: 220, 24 and 12 volts.
How to connect the device is shown in the figure below:
In some cases, an intermediate type relay is used as a contactor, then the installation diagram will look like this:
As you can see, the intermediate relay has three groups of contacts that control the load and one group to hold the current in the coil. You can install an additional contactor, then the device is connected first to the contactor.
Also, this unit can be connected to a motion sensor. Thanks to him, it is possible to connect several powerful lamps to the motion sensor system. Installation is as follows: the winding of the device is connected to the sensor, and the power contact switches the load in the luminaire system. How to install such a sensor is shown below:
Another option for installing an electronic starter is to the thermostat. The scheme is shown in the picture (click to enlarge):
In this case, the temperature controller and starter are connected in sequential order to the first phase and the neutral wire (in the diagram they are indicated as T1 and K1, respectively). Installation of the remaining contacts of the starter is carried out evenly between other phases.
Finally, we recommend watching a useful video on the topic:
That was all I wanted to tell you about how to properly connect this unit. We hope that the video instruction provided and the connection diagrams of the intermediate relay were useful to you!
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There is an email. magnetic starter with 4 NO cat. 220.v, relay with cat. 220 V, engine 3 f, start-stop buttons, and most importantly - a pressure switch that disconnects the circuit and you have to press the start button again to start the compressor engine., Since the self-locking is turned off. Can you give me an electrical circuit so that the relay commutes the email. The circuit and the circuit worked without my intervention.