Megger meter circuit diagram. High voltage ohmmeters chapter 8 dc metering circuits. With infinite resistance between the test leads open circuit there will be no current through coil 1 only through coils 2 and 3. With the terminals marked line and earth shorted giving a zero resistance the current flow through the coil a is sufficient to produce enough torque to overcome the torque of coil b.
Megger circuit diagram see more about megger circuit diagram digital megger circuit diagram earth megger circuit diagram megger circuit diagram megger circuit diagram and working megger internal circuit diagram megger schematic diagram megger test circuit diagram waco megger circuit diagram. When energized these coils try to center themselves in the gap. Connected in series with control and deflecting coil to protect damage in case of very low resistance in external circuit.
Accomplishing this design goal requires a special meter movement. Armature arranges to move in permanent magnetic field or vice. Megger makes electrical test equipment to help you install improve efficiency and extend the life of electrical assets and cable networks at high medium and low voltage.
You can see the selector switch over there the circuit diagram which can select the measuring rang form 0 to 1 ohm and 0 to 10 ohms. The megger is the instrument uses for measuring the resistance of the insulationit works on the principle of comparison ie the resistance of the insulation is compared with the known value of resistanceif the resistance of the insulation is high the pointer of the moving coil deflects towards the infinity and if it is low then the pointer indicates zero resistance. The basic circuit diagram of a series type meter is shown below.
From power station to plug megger test equipment helps you maintain the electrical network monitor its condition and maintain supply to your customers. In hand operated megger electromagnetic induction effect is used to produce the test voltage ie. The circuit diagram that you can see below is the ohm meter which can measure the resistance for 0 to 10 ohm.