4.9 Ipeak> – Peak Overcurrent Protection
The Peak Overcurrent module »Ipeak>« is aiming at extremely short detection and
operating times (approx. ½ period). It is primarily used for detecting a switching onto
an earthing and short-circuiting device, and therefore it is generally used in combination
with the Switch Onto Fault (SOTF) protection.
It monitors unltered phase current measurement values and checks whether these exceed
a particular peak threshold, and this way very fast tripping times can be achieved. But
on the other hand, there is no suppression of the DC component and no suppression
of harmonics.
The »Ipeak>« is useful if and only if the following aspects are essential for the application:
•
A very fast tripping time is the top priority (instead of all other aspects, especially
•
those requiring a Fourier ltering).
• The peak threshold is far above the inrush current (because it is not possible to block•
this protection stage by an Inrush Blocking).
In case of dierent requirements / priorities, you should consider using the Phase
Overcurrent protection instead.
For general information about the concept of WIC1 protection functions, see ╚═▷
“4.1 »Prot« – General Protection Module”.
163WIC1WIC1-1.0-EN-MAN
4 Protective Elements
4.9 Ipeak> – Peak Overcurrent Protection
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