18
TB XRI1-IE 11.01 E
6.1.6
Trip delay for high set element (t
I>>
)
Independent from the chosen tripping characteristic for
I>, the high set element I>> has always a definite-time
tripping characteristic. An indication value in seconds
appears on the display.
The setting procedure for forward or backward faults,
described in chapter 6.1.3, is also valid for the trip-
ping time of the high set element.
6.1.7
Pickup current for earth fault
element (I
E>
)
(Similar to chapter 6.1.1)
6.1.8
WARN/TRIP changeover
A detected earth fault can be parameterized as fol-
lows:
a) "warn" only the alarm relay trips
b) "TRIP" the trip relay trips and tripping values are
stored.
6.1.9
Time current characteristics for
earth fault element (CHAR IE)
(Similar to chapter 6.1.2)
6.1.10
Trip delay or time multiplier for
earth fault element (t
IE>>
)
(Similar to chapter 6.1.3)
6.1.11
Reset mode for inverse time
tripping in earth current path
(Similar to chapter 6.1.4)
6.1.12
Current setting for high set element
of earth fault supervision (I
E>>
)
(Similar to chapter 6.1.5)
6.1.13
Trip delay for high set element
of earth fault supervision (t
IE>>
)
(Similar to chapter 6.1.6)
6.1.14
Nominal frequency
The adapted FFT-algorithm requires the nominal fre-
quency as a parameter for correct digital sampling
and filtering of the input currents.
By pressing <SELECT> the display shows "f=50" or
"f=60". The desired nominal frequency can be ad-
justed by <+> or <-> and then stored with <ENTER>.
6.1.15
Adjustment of the slave address
Pressing push buttons <+> and <-> the slave address-
can be set in range of 1-32.
6.1.16
Setting of Baud-rate (applies for
Modbus Protocol only)
Different transmission rates (Baud rate) can be set for
data transmission via Modbus protokol.
The rate can be changed by push buttons <+> and
<-> and saved by pressing <ENTER>.
6.1.17
Setting of parity (applies for
Modbus Protocol only)
The following three parity settings are possible :
•
"EVN"
= even
•
"ODD"
= odd
•
"NO"
= no parity check
The setting can be changed by push buttons <+> and
<-> and saved by pressing <ENTER>.
6.1.18
Circuit breaker failure protection
t
CBFP
The CB failure protection is based on supervision of
phase currents during tripping events. Only after trip-
ping this protective function becomes active. The test
criterion is whether all phase currents are dropped to
<1% x I
N
within the time t
CBFP
(Circuit Breaker Failure
Protection, adjustable between 0.1 - 1.6s). If not all of
the phase currents have dropped to <1% x I
N
within
this time, CB failure is detected and the related relay
activated. The CB failure protection function is deacti-
vated again as soon as the phase currents have drop-
ped to <1% x I
N
within t
CBFP
