Functions
22
7UM62 Manual
C53000-G1176-C149-3
For the following application, the differential protection of device A must be set to
Generator/Motor
, and that of device B to
3-phase Transformer
. Also, the
settings of the generator data under Power System Data 1 must be same as for the
transformer data of side:
Figure 2-5
Use as Redundant Overall Protection
For earth fault protection, address
presents the options
non-
dir. only U0
,
non-dir. U0&I0
and
Directional
, unless the whole function is
Disabled
. The first option evaluates only the displacement voltage (to be used with
unit connection). The second option evaluates in addition to the displacement voltage
the magnitude of the earth fault current (or the difference between the starpoint current
and the total current of a toroidal CT, as is the case in busbar systems with low-ohmic
switchable starpoint resistors). The third option considers as a third criterion the
direction of the earth fault current in the case of machines in busbar connection where
the magnitudes of displacement voltage and earth fault current alone are not sufficient
to distinguish between system earth faults and machine earth faults.
Address
is used to specify which input will be used for earth
fault current measurement (I
EE1
or I
EE2
).
Address
specifies whether the circuit breaker failure
protection will apply for side 1 or side 2.
If the 7UM62 is equipped with analog outputs and you want to use them, the
addresses
and
allow to allocate the available measured
values to the analog outputs. All parameters of the analog outputs are accessed under
the block address
For trip circuit monitoring, address
is used to specify whether
two binary inputs (
with 2 Binary Inputs
) or only one binary input (
with 1
Binary Input
) should be utilized, or whether the function should be
Disabled
.
7UM62
G
3
∼
(B) Side 1
Address
=
3-phase Transformer
(A) Side 2
7UM62
A
B
(A) Side 1
(B) Side 2
Address
=
Generator/Motor
