User manual

Chapter 6 – Configuring Cyber Breaker the Virtual Circuit Breaker
58 ePower Power Distribution Unit User Manual, Revision 1.1
Example 1
In this example, a Virtual Circuit Breaker is configured on an IEC 60309
C19 outlet, with a maximum current rating of 20A. The trip delay starts at
7 seconds (a=7) at 4A (c=4, the breaker trip value), and decreases until it
reaches 2.5 seconds (d=2.5) at 20A. Above 20A, the trip delay is 0 seconds.
The equation for the Example 1 trip delay curve under 20A is:
Figure 6-1 Example 1 – Virtual Circuit Breaker Trip Delay Curve
ƒ (C)= 7•e
-0.333(
C
-4)
+2.5
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