ABB Relion 670 Series Applications Manual page 79

1MRK 511 401-UUS F
+
V
Pri
ANSI11000175 V1 EN-US
Figure 19: Commonly used markings of VT terminals
Where:
a)
b)
c)
d)
It shall be noted that depending on national standard and utility practices the rated secondary
voltage of a VT has typically one of the following values:
• 100 V
• 110 V
• 115 V
• 120 V
• 230 V
The IED fully supports all of these values and most of them will be shown in the following
examples.
4.2.4.3 Examples on how to connect a three phase-to-ground connected VT to the
IED
Figure 20
It gives 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.
Bay control REC670
Application manual
+
A
(H1)
V
Sec
N
(H2)
a) b)
is the symbol and terminal marking used in this document. Terminals marked with a square indicate the
primary and secondary winding terminals with the same (positive) polarity
is the equivalent symbol and terminal marking used by IEC (ANSI) standard for phase-to-ground
connected VTs
is the equivalent symbol and terminal marking used by IEC (ANSI) standard for open delta connected
VTs
is the equivalent symbol and terminal marking used by IEC (ANSI) standard for phase-to-phase
connected VTs
gives an example on how to connect the three phase-to-ground connected VT to the IED.
For correct terminal designations, see the connection diagrams valid for the
delivered IED.
© Copyright 2017 ABB. All rights reserved
a da
A
(X1) (H1) (X1)
dn
n N
(X2) (H2) (X2)
c)
Analog inputs
a
A
(X1)
(H1)
B b
(H2) (X2)
d)
ANSI11000175_1_en.vsd
Section 4
SEMOD55055-87 v9
73