Thytronic XMR-T - Page 145

FUNCTION CHARACTERISTICS
145
c(w)
w = H, L
Gnd(w) = Ou
w = H, L
Gnd(w) = In
w = H, L
0
Applied to the reference side w
for phase compensation or to
the w secondary side of power
transformers Yy0, Dd0, Dz0, Zd0
in which the primary side is the
reference side for the phase
compensation.
C
(w) = 0 1 0
1 0 0
0 0 1
Same as Yy0 adapter CTs with transformation
ratio 1 / 1 on the side w. The connection of the
secondary phase of the CT-adapters to the
relay inputs is L1-L1, L2-L2, L3-L3, with the same
polarity.
C
(w) = -1/3 2/3 -1/3
2/3 -1/3 -1/3
-1/3 -1/3 2/3
Same as Yy0 adapter CTs with transformation ratio 1 /
1 on the side w and connected with the tertiary delta
closed in short-circuit with transformation ratio 1 / 3
that removes the zero-sequence component from the
compensated current for the side w. The connection
of the secondary phase of the CT-adapters to the relay
inputs is L1-L1, L2-L2, L3-L3, with the same polarity.
-30
Applied to the w secondary
side of power transformers
Dy11, Zy11 in which the primary
side is the reference side for
phase compensation.
C
(w) = -1/√3 1/√3 0
1/√3 0 -1/√3
0 -1/√3 1/√3
Same as Yd1 adapter CTs with transformation
ratio 1 / 3 on the side w. The connection of the
secondary phase of the CT-adapters to the
relay inputs is L1-L1, L2-L2, L3-L3, with the same
polarity.
C
(w) = -1/√3 1/√3 0
1/√3 0 -1/√3
0 -1/√3 1/√3
Same as Yd1 adapter CTs with transformation ratio
1 / 3 on the side w. The connection of the secondary
phase of the CT-adapters to the relay inputs is L1-L1,
L2, L2, L3, L3, with the same polarity.
-60
Applied to the w secondary
side of power transformers
Dd10, Dz10, Zd10 where the pri-
mary side is the reference side
for phase compensation.
C
(H) = -1 0 0
0 0 -1
0 -1 0
Same as Yy0 adapter CTs with transformation
ratio 1 / 1 on the side w. The connection of the
secondary phase of the CT-adapters to the
relay inputs is L3-L1, L1-L2, L2-L3, with reverse
polarity.
C
(w) = -2/3 1/3 1/3
1/3 1/3 -2/3
1/3 -2/3 1/3
Same as Yy0 adapter CTs with transformation ratio
1 / 1 on the side we connected with the tertiary delta
closed short-circuit transformation ratio of 1 / 3 that
removes the component from the zero-sequence
compensated current for the side w. The connection
of the secondary phase of the CT-adapters to the re-
lay inputs is L3-L1, L1-L2, L2-L3, with reverse polarity.
-90
Applied to the w secondary
side of power transformers
Dy9, Zy9 where the primary side
is the reference side for phase
compensation.
C
(w) = -1/√3 0 1/√3
0 1/√3 -1/√3
1/√3 -1/√3 0
Same as Yd3 adapter CTs with transformation ratio
1 / 3 on the side w. The connection of the secon-
dary phase of the CT-adapters to the relay inputs
is L1-L1, L2-L2, L3-L3, with the same polarity.
C
(w) = -1/√3 0 1/√3
0 1/√3 -1/√3
1/√3 -1/√3 0
Same as Yd3 adapter CTs with transformation ratio
1 / 3 on the side w. The connection of the secondary
phase of the CT-adapters to the relay inputs is L1-L1,
L2, L2, L3, L3, with the same polarity.
-120
Applied to the w secondary
side of power transformers
Dd8, Dz8, Zd8 where the pri-
mary side is the reference side
for phase compensation.
C
(w) = 0 0 1
0 1 0
1 0 0
Same as Yy0 adapter CTs with transformation
ratio 1/1 on the side w. The connection of the
secondary phase of the CT-adapters to the
relay inputs is L2-L1, L3-L2, L1-L3, with the same
polarity.
C
(w) = -1/3 -1/3 2/3
-1/3 2/3 -1/3
2/3 -1/3 -1/3
Same as Yy0 adapter CTs with transformation ratio 1 / 1
on the side we connected with the tertiary delta closed
short-circuit transformation ratio of 1 / 3 that removes
the component from the zero-sequence compensated
current for the side w. The connection of the secon-
dary phase of the CT-adapters to the relay inputs is
L3-L1, L1-L2, L2-L3, with the same polarity.
-150
Applied to the w secondary
side of power transformers
Dy7, Zy7 where the primary side
is the reference side for phase
compensation.
C
(w) = 0 -1/√3 1/√3
-1/√3 1/√3 0
1/√3 0 -1/√3
Same as Yd5 adapter CTs with transformation ratio
1 / 3 on the side w. The connection of the secon-
dary phase of the CT-adapters to the relay inputs
is L1-L1, L2-L2, L3-L3, with the same polarity.
C
(w) = 0 -1/√3 1/√3
-1/√3 1/√3 0
1/√3 0 -1/√3
Same as Yd5 adapter CTs with transformation ratio
1 / 3 on the side w. The connection of the secondary
phase of the CT-adapters to the relay inputs is L1-L1,
L2-L2, L3-L3, with the same polarity.
XMR-T EQUIPMENT MANUAL
Ed. 2.9 - 02/2021