ABB Relion 670 Series Applications Manual page 88

Section 4
Analog inputs
4.2.4.7 Example on how to connect a neutral point VT to the IED
Figure 25
connection presents secondary voltage proportional to V
In case of a solid ground fault in high impedance grounded or ungrounded systems the primary
value of V
V
-
ph
=
V 0
3
EQUATION1932 V2 EN-US
Figure 25gives an overview of required actions by the user in order to make this measurement
available to the built-in protection and control functions within the IED.
82
gives an example on how to connect a neutral point VT to the IED. This type of VT
voltage will be equal to:
0
ph
=
V
-
ph Gnd
© Copyright 2017 ABB. All rights reserved
GUID-E0EE34BE-A9B0-4F4F-9C06-BBBE87AD0017 v1
to the IED.
0
1MRK 511 401-UUS F
(Equation 11)
Bay control REC670
Application manual