What is the NETA-MTS recommended maximum AC test voltage for certain circuit reclosers?

The recommended maximum AC test voltage for certain circuit reclosers is set at 37.5kV by NETA-MTS. This standard ensures that the voltage used during testing is sufficient to evaluate the insulation integrity and overall performance of equipment without exceeding safe operational limits. Testing at this voltage helps ensure that circuit reclosers can effectively handle their expected system voltages and any potential transient overvoltages they may encounter in service.

Testing above this level may pose additional risks to the equipment and may not yield any significant benefits for performance assessment. Therefore, sticking to the 37.5kV benchmark during testing aligns with industry best practices intended to maintain safe and reliable performance while safeguarding both the equipment and the tester.