It is measured with a definite target(Part 2) 17. Technique of measuring three-phase three-wire current with a clamp ammeter Three - phase three - wire current is measured by a clamp ammeter.Kirchhoff a certain rate is obtained by measuring a technique.The clamp mouth is connected with a wire to read the current value of the phase. Put two wires into the clamp mouth to read the third phase cu...
It is measured with a definite target(part 1) 1. Use the multimeter correctly Use multimeter correctly and be familiar with dial before use.Two zero adjusters, gently rotate to zero.Correctly select the terminal post and insert the red and black marker into the right hole. The transfer switch should rotate the gear, and the gear should be selected correctly.Choose the proper range to make the meas...
Test pen, lamp inspection judgment 1. Correct holding method when using low-voltage measuring pen Commonly used low - voltage measuring pen, master the test two - grip method.Pen type measuring pen, the palm touch pressure metal clip.Hold the pencil in the middle between your index and middle fingers. Screwdriver type measuring pen, index finger press tail metal cap.The middle finger and ring fing...
Sensory diagnosis is quick and easy 1. Judgment of abnormal sound of power transformer Normal operation of transformer, clear and uniform hum.If there is any abnormal sound, judge the cause of the fault point.A buzzing sound of high pitch, overload or overvoltage. Intermittent violent gurgle, single - phase load increased sharply.There was a jingle of hammering and the threaded screw was loose.The...
In these modern times, the manufacturer's use of the PLC PC Software for PLC programming. The most commonly used is called ladder programming logic. The use of symbols and not of relay contacts logic words to simulate control logic PLC, which is the Legacy of the story. These symbols to indicate the Interconnection Lines (eg through contacts and relays of Coil Current) .With the passing of TWO Yea...
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