Thytronic Pro-N NVA100X-D, Manual

Page: 75 / 376

FUNCTION CHARACTERISTICS
75
NVA100X-D - Manual - 02 - 2016
VTs Phase primary voltage U
np
This parameter affects the measure of the phase voltages when the primary measurement reading
mode is selected for phase-to-phase, calculated residual voltages, power and energy.
If the formerly indications concerning the relay nominal voltage
U
n
are complied, then the U
np
set-
ting must be adjusted to U
np
= grid nominal voltage [V].
Example 1
The U
np
setting must be adjusted to: U
np
= U
ng
= 6.9 kV
Example 2
The U
np
setting must be adjusted to: U
np
= U
ng
= 6 kV
Example 3
The U
np
setting must be adjusted to: U
np
= U
ng
= 400 V
Residual primary voltage U
Enp
This parameter affects the measure of the direct residual voltage when the primary measurement
reading mode is selected.
If the formerly indications concerning the relay nominal residual voltage
U
En
are complied, then the
U
Enp
setting must be adjusted to (effective for insulated neutral or impedance-ground connected
grids):
U
Enp
= √3 ∙ grid nominal voltage [V].
Example 1
The U
Enp
setting must be adjusted to: U
Enp
= √3 · U
ng
= √3 · 6900 V = 11900 V
•
•
Grid rated voltage U
ng
= 6.9 kV
VTs ratio: K
TV
=
Relay rated voltage U
n
= 69 V
Es1-Ung.ai
K
TV
=
/
/
V
V
10000 3
100 3
= 100
/
/
V
V
10000
3
100 3
= 100
U
n
= 69 V
U
ng
= 6.9 kV
52
NVA100-D
Grid rated voltage U
ng
= 6.9 kV
VTs ratio: K
TV
=
Relay rated voltage U
n
= 69 V
Es1-Ung.ai
K
TV
=
/
/
V
V
10000 3
100 3
= 100
/
/
V
V
10000
3
100 3
= 100
U
n
= 69 V
U
ng
= 6.9 kV
52
NVA100-D
Es2-Ung.ai
K
TV
=
/
/
V
V
6000
3
100 3
= 60
/
/
V
V
6000
3
100 3
= 60
Grid rated voltage U
ng
= 6 kV
Relay rated voltage U
n
= 100 V
U
n
= 100 V
U
ng
= 6 kV
52
NVA100X-D
VTs ratio: K
TV
=
Es2-Ung.ai
K
TV
=
/
/
V
V
6000
3
100 3
= 60
/
/
V
V
6000
3
100 3
= 60
Grid rated voltage U
ng
= 6 kV
Relay rated voltage U
n
= 100 V
U
n
= 100 V
U
ng
= 6 kV
52
NVA100X-D
VTs ratio: K
TV
=
Es3-Un.ai
U
ng
= 400 V
U
n
= 400 V
52
NVA100X-D
Es3-Un.ai
U
ng
= 400 V
U
n
= 400 V
52
NVA100X-D
Es-UEnp.ai
K
VT
=
/
/
V
V
10000 3
3
100 3
= 100 ·
/
/
V
V
10000
3
3
100 3
= 100 ·
Grid rated voltage U
ng
= 6.9 kV
VT ratio: K
VT
=
Relay residual rated voltage U
En
= 69 V
U
En
= 69 V
/
U
ng
= 6.9 kV
52
Insulated or impedance-ground neutral
NVA100X-D
Es-UEnp.ai
K
VT
=
/
/
V
V
10000 3
3
100 3
= 100 ·
/
/
V
V
10000
3
3
100 3
= 100 ·
Grid rated voltage U
ng
= 6.9 kV
VT ratio: K
VT
=
Relay residual rated voltage U
En
= 69 V
U
En
= 69 V
/
U
ng
= 6.9 kV
52
Insulated or impedance-ground neutral
NVA100X-D