Do you know the Up value of surge protectors?
Frequently Asked Questions
What does the Up value of a surge protector mean?
Up stands for voltage protection level, a parameter that characterizes the performance of the SPD in limiting the voltage across its terminals. It is selected from a list of preferred values and is greater than the highest measured limiting voltage.
What are the preferred values of Up according to IEC61643-11?
The preferred values are: 0.08, 0.09, 0.10, 0.12, 0.15, 0.22, 0.33, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.5, 1.8, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, and 10 kV.
Is a smaller Up value always better?
A small Up value is beneficial for protecting equipment, but it is not necessarily better to have a smaller Up value. Factors such as temporary overvoltage (TOV) should be considered, and the Up must be appropriately selected to match the protected equipment.
How does the maximum continuous operating voltage (Uc) or nominal current (In) affect Up?
As Uc or In increases, Up will also increase. When other parameters of the SPD cannot meet Up, it is necessary to comprehensively consider and choose Up that is closest to meeting the conditions.
Why is it important to understand the Up value when choosing a surge protector?
Understanding the Up value helps in selecting the appropriate voltage protection level, which can effectively protect equipment and improve its stability and reliability.
