PWB03CM2310A Carlo Gavazzi

PWB03CM2310A, Control relays and Protection Three-phase control and active power steering Models DWB03, PWB03, PWB03CM2310A, These relays allow precise control of active power (TRMS measurement) in three-phase systems with balanced load. They are used to control the load of asynchronous motors and other symmetrical loads, and also to see if the current is flowing in the right direction. The start/stop input allows a manual switch to be used to start and stop the system without the need for any auxiliary device. The interlocking function allows the relay to be kept activated even after the alarm condition is over. LeDs indicate the status of the alarm and the output relay., PWB03CM2310A, The DWB03 and PWB03 equipment measure the active power of a three-phase system with balanced load. To avoid the detection of overloads during engine start-up, the relay has a delay to the adjustable connection. Example 1 Interlocking mode, relay normally activated. In this case, the DWB03 or PWB03 equipment is connected to a three-phase asynchronous motor through a standard intensity trafo or the MI model ..., (connected between U1 and U2 terminals). When the supply voltage is applied, the relay connects, and after the delay to the adjusted connection, the equipment begins to measure the power. If this is within the established limits, the relay is kept connected and the yellow LED lights up. If the power is above or below the set limits, the relay disconnects when the adjusted time period has ended. To restart the measurement, connect the Z1 and U1 terminals (2 and 9) or interrupt the supply voltage for at least 1 s. Example 2 Interlocking mode, relay normally activated. Control of the correct direction of the power of a generator. The DWB03 and PWB03 react as in the previous example 1. By setting the setpoint of the minimum limit to 0, the generator can be protected against overloads and against reverse power directions as when the generator works as a motor. In the latter case you will disconnect it.