Datakom DPR-350 Series, Руководство пользователя

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DPR-350 User Manual Ver_01 Firmware V-1.0
If the voltage and current of one phase are in the same direction, the current is flowing from the source to
the load, which means it is forward directional. If the voltage and current of one phase are in opposite
directions, the current is flowing from the load to the source, which means it is reverse directional.
Protections can be configured directionless or for either of these directions.
As e
xplained in the “OVERCURRENT PROTECTION (ANSI 50/51)” section, protections can be
configured as directional. In addition, different levels of protection can be configured for forward and
reverse directions.
If the breaker fails to open at the end of the configured timer when the open command was sent, this
means that the breaker has failed to perform its function, and is malfunctioning. In this situation, breaker
failure status occurs. One of the outputs can be configured as breaker failure output.
Digital inputs can be configured to read the open and closed contacts of the breaker. If breaker contact
information is assigned to digital inputs, abnormal situations will be displayed
on the device’s protection
screen (MIMIC DIAGRAM) with the following symbols:
SYMBOL DESCRIPTION
? Breaker closed with correct closed input signal, but breaker open input signal also active.
?? Breaker open with correct open input signal, but breaker closed input signal also active.
X
Opposite breaker position and input position. Input reads closed while breaker is open, or
input reads open while the breaker is closed.
No symbol means breaker position and input values are correctly corresponding, or inputs
are not configured to read breaker position.
Example;
After a successful breaker trip, the system can be asked to try a reclosure if the fault cause is removed.
Up to 4 reclosure trials at different timers can be done and the number of trials can be configured. In
addition, a no fault timer after which the reclosure is counted as successful can be configured.
Automatic reclosure can be assigned to any output.
10.5. DIRECTIONAL OVERCURRENT PROTECTION (ANSI 67)
10.6. BREAKER FAILURE (ANSI 50BF)
10.7. AUTOMATIC RECLOSURE (ANSI 79)
Breaker open with correct open input
signal, but breaker open input signal also
active.