Application

In various rotating systems such as electric motors and AC / DC alternators, the concept of excessive rotational speed, which literally means that the system escapes from normal speed, causes irreparable and unforeseen damages. For example, in electromotive generators or diesel generators, excessive increase in the rotation speed of the alternator (ie escape of the diesel generator) can be done to the diesel from various mechanical points and electrically to the consumers (due to overheating) due to overheating. Create and cause a fire in the alternator itself. This relay can be used to prevent such damage

Designing

For easy use and quick installation, this relay is embedded in an insulating cover that can be installed on rails with DIN EN 50022 standard.
In order to connect the inputs and outputs of this relay, suitable terminals have been considered in both directions, which can be referred to the attached map for its connections.
The following items are installed on the relay:
– Suitable selectors to adjust the speed limit and latency
– Three optical displays (LED) to display the status of voltage and input signal and the occurrence of error
– A number to reset the relay and test the electrical circuit connected to it

Function

After connecting the input voltage to the intended terminals, to adjust the speed limit based on the sensor connected to the relay, the value should be calculated and adjusted by the selectors installed on the relay for this purpose. After connecting the supply voltage to the relay, the internal microprocessor system starts reading the speed value and starts flashing according to the input pulses of the display. In addition, the supply voltage status indicator will be on as long as the voltage accuracy is acceptable in terms of the internal settings of the relay, and also announces the readiness of the relay for operation.
This relay, as shown in the technical table attached to the relay, has the ability to connect four types of sensors that can read pulses from zero to 600,000 pulses per minute.
If the read speed exceeds the set limit, the relay activates the relay output by taking into account the delay time set by the selector installed on the relay for this purpose, and turns on the error display intended for this purpose. . If the speed is lower than the intended limit, the relay output remains active until the relay is reset by the reset switch or its input from the terminals intended for this purpose and the relay is ready to work again from the beginning. To be.