1- Current or load balance test:

Load balancing is the important factor in electrical system. It means all three phases should be loaded as equal. Maximum unbalance load should not be more than 30% which can be tolerated by system. If the unbalance load is more than 30% then the system may be failure.

So for better health of equipment, the unbalance load is tested. It is tested through clamp meter or amp meter.

2- Testing diagram of breakdown voltage test:

3- Load(Current) test kit:

• Panel busbar cover open close required tool.
• Clamp meter.
• Electrical rubber gloves.
• Safety shoes.
• All required tool will be properly insulated.

4- Safety guideline for load balancing test:

Unbalance load test is carried out on the running load panel so some precaution is important.

• Testing equipment battery should be charged .
• During testing electrical gloves should be wear in your hands.
• Related panel all equipment should be ON condition.
• Panel cover should be open and close with carefully.

5-Unbalance load test procedure:

• All safety guideline should be followed during testing procedure which is mentioned above.
• Open the panel side cover with carefully.
• Select the knob of clamp meter on Amp range.
• Open the zaw of clamp meter and capture the R phase cable.
• Check the display and note down the testing load value.
• Again test load on Y, B phase and Neutral with same process.
• Neutral current shows unbalance load.
• Comparison all phase load and find unbalance load.
• Neutral load is also called as unbalance load.

6-Unbalance load testing observation. :

• Comparison all phase load value and fined out unbalance load.
• Comparison all phase difference load value with neutral load value it should be equal.
• We can find out easily which phases is overloaded.

Go back to index ↑

---