Functions
2.4 Functional Scope
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
47
Figure 2-7 Use as Redundant Overall Protection
For earth fault protection, Address 150 S/E/F PROT. presents the options non-dir. 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 in busbar systems with low-ohmic switchable starpoint resistors). The third option considers as a
further criterion the direction of the earth fault current if with machines in busbar connection the magnitudes of
displacement voltage and earth fault current alone are not sufficient to distinguish between system earth faults
and machine earth faults.
Address 151 O/C PROT. IEE> is used to specify which input will be used for earth fault current measurement
(with IEE1 or with IEE2).
Address 170 BREAKER FAILURE 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 173, 174, 175 and
176 allow to allocate the available measured values to the analog outputs. All parameters of the analog outputs
are accessed under the block address 7301 to 7308.
For trip circuit monitoring, address 182 Trip Cir. Sup. is used to specify whether two binary inputs (2
Binary Inputs) or only one (1 Binary Input) should be utilized, or whether the function is configured as
Disabled.
To Next Page
Loading...
Need help?
General
