Thytronic NV10P User Manual

49
NV10P - Manual - 01 - 2015
CHARACTERISTICS
RESIDUAL VOLTAGE VTs POSITIONING
Installation downstream of the DDI is admitted but, to avoid that at reclosing of the DDI a possible
single-phase fault to ground is fed until trip of 59N protection (25 s), the two following alternatives
are possible:
only for static generators, the generator must wait for a time of at least 30 s before connecting to
the grid;
for all generators (with the exception of synchronous generators) that the SPI, on the closing com-
mand of the DDI, automatically set the operate time off>>, f<<, UE>> thresholds to 0.20 s for a time
of at least 30 s after the closing of the DDI.
The element disabling when the circuit breaker is open can be selected by setting ON the
xxdisbyCB_OPEN parameters inside the Set \ Profi le A(or B) \ yy \ Setpoints, menu where xx is
is the element that you want to disable (eg: f>) and yy is the corresponding function (eg: Residual
overvoltage-59N).
When the CB closes, the operate time of the f >>, << f, UE >> elements is automatically adjusted to
a reduced value tcxx>>def for an adjustable time tatcxx>>def. The reduction of the operate
time for the second threshold can be selected by setting the EnTcxx>>def parameter inside the
Set \Profi le A(or B) \ yy \ xx>> Element \ Setpoints menu, while the timers are adjustable inside the
Set \Profi le A(or B) \ yy \ xx>> Element \ Defi nite time menu.
•
•
A)
B)
Grid
Load
3xVt-I
phase-phase
3xVt-NI
phase-ground
DDI
Grid
Load
DDI
I
SPI
SPI
Grid
Load
3xVt-I
phase-phase
3xVt-NI
phase-ground
DDI
Grid
Load
DDI
I
SPI
SPI
Operate time reduction after CB closing (eg: UE>> element) )
RESET
t
UE>>
0T
(closing)
DDI OFF->ON
(1≡upstream)
EnTcUE>>def
t
atcUE>>def
0T
RESET
t
UE>>def
t
cUE>>def
t
atcUE>>def
“1”
“0”
TV downstream
CB State
CB CLOSED (52a=ON)
CB OPEN (52a=OFF)
t
UE>>
= t
cUE>>def
t
UE>>
= t
cUE>>def
t
atcUE>>def
t
UE>>
t
UE>>
= t
UE>>def
Operate time reduction after CB closing (eg: UE>> element) )
RESET
t
UE>>
0T
(closing)
DDI OFF->ON
(1≡upstream)
EnTcUE>>def
t
atcUE>>def
0T
RESET
t
UE>>def
t
cUE>>def
t
atcUE>>def
“1”
“0”
TV downstream
CB State
CB CLOSED (52a=ON)
CB OPEN (52a=OFF)
t
UE>>
= t
cUE>>def
t
UE>>
= t
cUE>>def
t
atcUE>>def
t
UE>>
t
UE>>
= t
UE>>def

Thytronic NV10P Specifications

General

Brand	Thytronic
Model	NV10P
Category	Relays
Language	English