Surge Arrester datasheet :
- type
- Un: Rated network voltage. : KV
- Uc: Maximum continuous operating voltage; the maximum r.m.s. or d.c. voltage which may be continuously applied to the SPDs mode of protection. This is equal to the rated voltage. : KV
- Surge protective device (SPD): A device that is intended to limit transient overvoltages and divert surge currents. It contains at least one nonlinear component
- Test classes: Surge arrester test classification.
- In: Nominal discharge current ; the crest value of the current through the SPD having a current waveshape of 8/20. This is used for the classification of the SPD for the class II test and also for preconditioning of the SPD for class I and II tests.
- Imax: Maximum discharge current for class II test; crest value of a current through the SPD having an 8/20 waveshape and magnitude according to the test sequence of the class II operating duty test. Imax is greater than In.
- Ic: Continuous operating current ; current that flows in an SPD when supplied at its permament full withstand operating voltage (Uc) for each mode. Ic corresponds to the sum of the currents that flow in the SPD’s protection component and in all the internal circuits connected in parallel.
- Iimp: Impulse current, it is defined by a current peak value Ipeak and the charge Q. Tested according to the test sequence of the operating duty test. This is used for the classification of the SPD for class I test.
- Up: Voltage protection level; a parameter that characterizes the performance of the SPD in limiting the voltage across its terminals, which is selected from a list of preferred values. This value shall be greater than the highest value of the measured limiting voltages.
The most common values for a 230/400 V network are:
1 kV - 1.2 kV - 1.5 kV - 1.8 kV - 2 kV - 2.5 kV.
The most common values for a 230/400 V network are:
1 kV - 1.2 kV - 1.5 kV - 1.8 kV - 2 kV - 2.5 kV.
- Ures: Residual voltage, the peak value of the voltage that appears between the terminals of an SPD due to the passage of discharge current.
The SPD is characterised by Uc, Up, In and Imax
The SPD is characterised by Uc, Up, In and Imax
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