How to measure lightning arrester leakage current?

How to measure lightning arrester leakage current?

Step 1: Preparation.

Before measuring the lightning arrester leakage current, you need to prepare a few things. Firstly, you need to ensure that the lightning arrester is disconnected from the system. Secondly, you should have a digital multimeter, which is capable of measuring AC current.

Step 2: Set the Multimeter.

Set the multimeter to the AC current measurement mode. Depending on the multimeter, you may have to select the range of current you wish to measure. Ensure that the range is set appropriately.

Step 3: Connect a Current Probe.

If your multimeter does not have an inbuilt current probe, you will need to connect one to the multimeter. The current probe should have a BNC connector that plugs into the multimeter. Ensure that the probe is securely connected.

Step 4: Connect the Probe to the Lightning Arrester.

Connect the current probe to the external grounding lead of the lightning arrester. Ensure that the probe is securely connected to the lead.

Step 5: Switch on the Power Supply.

Once everything is set up and connected properly, switch on the power supply to the system. Ensure that the lightning arrester is not connected to the system yet.

Step 6: Measure the Leakage Current.

With the power supply switched on, you can now measure the leakage current. Connect the lightning arrester to the system. Allow the system to run for a few minutes to ensure that the lightning arrester has stabilized. Then, take a reading on the multimeter. Record the value.

Step 7: Repeat the Measurement.

To ensure accuracy, you should repeat the measurement a few times. Record each reading. Calculate the average of the readings.

Step 8: Interpret the Results.

The average of the readings gives you the value of the lightning arrester leakage current. The value obtained should be within the manufacturer's recommended range. If the current is too high, then the lightning arrester may have failed and needs to be replaced.

Conclusion.

Measuring lightning arrester leakage current is a straightforward process. With a few simple steps, the procedure can be completed accurately. Regularly measuring leakage current can help ensure network protection remains optimal.

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