Safety is the most important thing, so you need to look for solutions that will ensure it. Motors powered from a three-phase network are protected using a phase loss sensor. It's worth learning more about this.
Check phase failure sensors at the Onninen wholesaler
What is the phase loss sensor used for?
In the event of a power outage, you need to look for a solution. It is worth knowing how important a role phase loss sensors play here. These are electrical devices that detect phase failure in a three-phase network. In the event of a phase failure, the engine may be damaged, resulting in the need for repairs, which may involve high costs.
Each phase loss sensor works on a simple principle, namely it compares the amplitude and phase of signals coming from three phases of the power supply network. If a phase failure occurs, the signal of one of the phases will have a different amplitude. As a consequence, the engine will turn off. There may also be an asymmetry of tensions. You also need to know that a properly selected sensor will protect electric motors against damage or complete destruction. The sensor sends a signal to the relay about a malfunction.
Consequently, the relay can protect the motor from further damage. Then, when the phase returns, it is necessary to switch it on again. The sequence sensors turn on one by one. Any voltage loss is very harmful to the electric motor. Phases are switched off, for example, as a result of a voltage failure, but also when there is complete asymmetry.
How to connect a phase loss sensor?
The phase loss sensor can be easily connected. Thanks to this, it will protect the motor when a phase failure occurs in at least one phase. Importantly, the shutdown will also occur when the voltage increases in any phase. Installing the device is actually very simple. First of all, check the correct operation of the engine by verifying the value between phases. Then we remove the fuses of all phases and install the sensor next to the contactor. We use terminals that may be marked L1, L2, L3. The terminals are connected to the mains terminals of the contactor. We always do it from the fuses side. Then we disconnect the power cable of the contactor control circuit from the phase. Finally, we connect it to the clamp.
Phase failure sensors in the Onninen wholesaler
It is worth choosing the F&F CKF-317 phase loss sensor, contacts: 1P, I=10A, adjustable threshold: 165-180V, 1 module . This work sensor is indeed extremely functional and very sensitive. It has an adjustable threshold and one module. Protects the directions of engine rotation. Note that it has phase loss detection. The type of connection it uses is a screw connection.
A good choice will also be the F&F CZF-BR phase loss sensor, contacts: 1P, I=10A, adjustable threshold: 165-180V, 2 modules from F&F. This is another model that is very popular. Unlike its predecessor, it has 2 modules. It is a sensor with a fixed asymmetry threshold. This model is distinguished by the fact that the time delay in the event of a power failure is no longer than 4 seconds.
The F&F CZF-310 phase failure sensor, contacts: 1P, I=10A, 1 module may also be a suitable solution. This relay has a fixed unbalance threshold. It is equipped with phase asymmetry control. However, it does not have phase sequence control. Here, too, the time delay is 4 seconds.