Version Changes
‑401/402
‑602-706
Release: 2002-06-06
No changes.
Diagram
No changes.
Software
LOC
Bug fixing:
●
Two pixels in the Cyrillic characters were
displayed incorrectly. This bug affected only the
language variant -805.
P634
‑302
‑401/402
‑603
Release: 2002-11-27
Hardware
No changes.
Diagram
No changes.
Software
IDMT Accuracy of tripping time is improved. Particularly the
characteristic “IEC extremely inverse” is now within the
claimed tolerance range.
DVICE
Bug fixing:
●
A device ID for the entry of an order extension
number was missing.
DIFF Amplitude matching factor restrictions are relaxed.
Zero sequence current filtering for odd vector group IDs
is improved.
Setting ranges of the tripping characteristic and of the
unrestrained differential element are extended.
The hysteresis of the tripping characteristic can now be
disabled.
Definite-time trip delay is available.
REF_x Amplitude matching factor restrictions are relaxed.
Two new operating modes are available. One provides
a high impedance measuring principle.
The setting range of the unrestrained differential
element is extended.
New tripping signals are provided for the application of
the low impedance operating mode with
autotransformers.
f<> Measurements of minimum frequency during an
underfrequency situation and maximum frequency
during an overfrequency situation have been added.
A5 P634 Version History P634
P634/EN M/R-42-A // P634‑311‑653 A5-3
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