Downloading Settings And Configuration From A Pc; Writing An Application Configuration To The Ied - ABB RET670 Installation And Commissioning Manual

1MRK 504 088-UEN C
12.4
12.4.1
Installation and commissioning manual
The primary CT data are entered via the HMI menu under Main menu/Settings/
General Settings/Analog modules/AnalogInputs
The following parameter shall be set for every current transformer connected to the
IED:
Table 19: CT configuration
Parameter description
Rated CT primary current in A
This parameter defines the primary rated current of the CT. For two set of CTs with
ratio 1000/1 and 1000/5 this parameter is set to the same value of 1000 for both CT
inputs. Negative values (that is -1000) can be used in order to reverse the direction
of the CT current by software for the differential function. This might be necessary
if two sets of CTs have different star point locations in relation to the protected
busbar. It is recommended that this parameter is set to zero, for all unused CT inputs.
For main CTs with 2A rated secondary current, it is recommended to connect the
secondary wiring to the 1A input and to set the rated primary current to one half
times its true value. For example, a CT with a primary secondary current ratio of
1000/2A can be treated as a 500/1A CT.
Take the rated permissive overload values for the current inputs
into consideration.

Downloading settings and configuration from a PC

Writing an application configuration to the IED

When writing a configuration to the IED with the application configuration tool,
the IED is automatically set in configuration mode. When the IED is set in
configuration mode, all functions are blocked. The red LED on the IED flashes,
and the green LED is lit while the IED is in the configuration mode.
When the configuration is written and completed, the IED is automatically set into
normal mode. For further instructions please refer to the users manuals for
PCM600.
Configuring the IED and changing settings
Parameter name
CT Prim Input
Section 12
Range
from -10000 to +10000
Default
0
103