Eaton EMR-4000, Инструкция по установке, эксплуатации и обслуживанию

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EMR-4000 IM02602009E
51P - Overcurrent Protection [51, 51C, 51V]
Available stages:
51P[1] ,51P[2] ,51P[3]
If you are using inrush blockings the tripping delay of the current protection
functions must be at least 30ms or more in order to prevent faulty trippings.
In order to ensure correct functioning of the directional detection after single-phase
short-circuits, the following reference voltage is used: For phase current
IA it is the
line-to-line voltage
VBC, for phase current IB the line-to-line voltage VCA and for
phase current
IC the line-to-line voltage VAB.
In case the fault happens to be near the measuring location and there is no reference
voltage for directional recognition available any more (neither measured or from
history (voltage memory)), then the module will - depending on the parameter setting -
either trip non-directional or it will be blocked.
All overcurrent protective elements are identically structured.
This module offers Adaptive Parameter Sets.
Parameters can be modified within parameter sets dynamically by means of
Adaptive Parameter Sets.
Please refer to chapter Parameter / Adaptive Parameter Sets.
The following table shows the application options of the Overcurrent Protection element
Applications of the 51P-Protection Module Setting in Option
ANSI 51 – Short circuit protection, non-
directional Device Planning menu Criterion: Fundamental/TrueRMS
ANSI 51V – Voltage restraint overcurrent
protection Parameter Set:
VRestraint = active Criterion: Fundamental/TrueRMS
51C Voltage controlled overcurrent protection
( Please refer to the chapter
Parameter/Adaptive Parameter )
Adaptive Parameters Criterion: Fundamental/TrueRMS
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