TB MRU3-2 12.00 E
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5.4.2
Parameter setting of over- and
undervoltage supervision
The setting procedure is guided by two coloured
LEDs. During setting of the voltage thresholds the LEDs
U<, U<<, U> and U>> are lit green. During setting of
the trip delays t
U>
, t
U>>
, t
U<
and t
U<<
the according LEDs
light up red.
Thresholds of the voltage supervision
During setting of the threshold U>, U>>, U< and U<<
the displays shows the voltages directly in volt. The
thresholds can be changed by the <+> <-> push but-
tons and stored with <ENTER>.
The undervoltage supervision (U< and U<<) as well as
the overvoltage supervision (U> and U>>) can be de-
activated by setting the threshold to "EXIT".
Tripping delay of voltage supervision
During setting of the tripping delays t
U<
, t
U<<
, t
U>
and t
U>>
the display shows the value directly in seconds. The
tripping delay is changed via the push button <+>
and <-> in the range of 0,04 s to 50 s and can be
stored with the push button <ENTER>.
When setting the tripping delay to "EXIT" the value is
infinit meaning only warning, no tripping.
5.4.3
Positive sequence system
voltage (U1<, U1>)
Rms values and tripping delays can be set in the simi-
lar manner as described for the normal under-/over
voltage settings. Both elements can be blocked or set
as alarm stages.
5.4.4
Negative sequence system
overvoltage (U2>)
This parameter determines the treshold for the rms
value of the negative sequence system. As described
in 5.4.2, the entire stage can be blocked or set as
alarm element.
5.4.5
Zero sequence system
overvoltage (U0>)
The treshold for the rms value of the zero sequence sys-
tem can be set with this parameter. Also here it is pos-
sible, as described in chapter 5.4.2, to block the en-
tire element or to set it only as alarm element.
5.4.6
Adjustment of the slave address
By pressing push buttons <+> and <-> the slave ad-
dress can be set in the range of 1 - 32. During this ad-
justment the LED RS lights up.
5.4.7
Setting of Baud-rate (applies for
Modbus-Protocol only)
Different transmission rates (Baud rate) can be set for
data transmission via Modbus Protocol.
The rate can be changed by push buttons <+> and
<-> and saved by pressing <ENTER>.
5.4.8
Setting of parity (applies for
Modbus-Protocol only)
The following three parity settings are possible :
•
"even"
= even
•
"odd"
= odd
•
"no"
= no parity check
The setting can be changed by push buttons <+> and
<-> and saved by pressing <ENTER>.
5.5
Parameter for the fault recorder
5.5.1
Adjustment of the fault recorder
The
MRU3-2
is equipped with a fault recorder (refer to
chapter 3.1.5). Three parameters can be determined.
