Notes on the use of relays 1. Rated operating voltage: This is the voltage required by the coil for the relay to operate normally. Depending on the type of relay, it can be either AC voltage or DC voltage.2. DC resistance: This is the DC resistance of the coil in the relay and can be measured by a

Common Bridge Rectifier Testing Methods 1. Test the rectifier circuit, find the p terminal and N terminal of the DC power supply inside the inverter, adjust the multimeter to resistance X10, connect the red pen to P and the black pen to R , S and T. The resistance value should be about a few tens of

What is a microwave sensor

The role of the vehicle loop detector in the parking lot system In the parking lot system, to determine the role of the loop detector, we must first know the location of the detector installation. The loop detector is generally installed in the following four positions: 1. At the entrance tick

How to test the rectifier bridge is good or bad? With a digital multimeter diode file or pointer table 100 or 1000 files, measure the two AC input to the output of the rectifier bridge resistance, if it is an open circuit or short circuit that the rectifier bridge has been bad. The normal value shou

The role of rectifier bridge: the rectifier function of bridge rectifier is through the diode's single conduction principle to complete the work, to achieve the conversion of alternating current to direct current. Rectifier bridge is divided into full bridge and half bridge. The full bridge is conne