Supervision Of Input/Output Modules - Hitachi Relion 670 Series Commissioning Manual

Section 5
Configuring the IED and changing settings
Table 12:
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. The parameter CTStarPoint
can be used in order to reverse the direction of the CT. This might be necessary if two sets of CTs have
different neutral (WYE) point locations in relation to the protected busbar.
For main CTs with 2A rated secondary current, it is recommended to connect the secondary wiring to the
1A input.
5.3

Supervision of input/output modules

I/O modules configured with PCM600 (BIM, BOM or IOM) are supervised.
I/O modules that are not configured are not supervised.
Each logical I/O module has an error flag that indicates signal or module failure. The error flag is also set
when the physical I/O module of the correct type is not detected in the connected slot.
52
CT configuration
Parameter name
CTPRIMn
n = channel number
Take the rated permissive overload values for the current inputs into consideration.
© 2017 - 2023 Hitachi Energy. All rights reserved
Range
from 0 to 99999
1MRK506371-UUS Rev. M
Default
3000
M11728-2 v3
Line distance protection REL670
Commissioning manual