ICP-S Technical Manual
Overcurrent Protection Elements
Rev.A
7/13
7. ICP-S Test Example
7-1 Example 1
Current mode: DC
Model: ICP-S1.0
Wave form:
DC
1A
2A
5A
Test:
The current values of all segmented periods are plotted respectively as shown in attached graph 1.
1 A: The steady-state current is in the safety area where the ICP-S will not deteriorate or break the current.
2 A: The ICP-S will break the steady-state current in the breaking current area in approximately 100 ms.
5 A: The ICP-S will break the steady-state current in the breaking current area in approximately 0.7 ms.
7-2 Example 2
Current mode: A single pulse
Model: ICP-S1.0
Wave form: A current of 1.75 A flows for a period of 20 ms.
Results: The steady-state current is in the critical area. If the single pulse is repeated intermittently,
the ICP-S will deteriorate or break the current in the end.
Test:
With pulse current: I
2
t = 1.75
2
×
20
= 61 (A
2
•
ms) at 20ms (See graph 2)
20ms
1.75A
