Siemens SIPROTEC 4 7VE61 User Manual

[logik-dead-line-freigabebedingungen-220403-kn, 1, en_GB]
Figure 2-13
Enabling conditions for switching to dead line/bus
Before granting e.g. an enabling for connecting the energized power system component U
1
to the de-ener-
gized power system component U
2
, the following conditions are checked:
•
Is the reference voltage U1 is above the setting value Umin and U> but below the maximum voltage
Umax?
•
Is the voltage to be synchronized U
2
below the setting value U<?
•
Is the frequency f1 within the permitted operating range f
N
± 3 Hz?
After successful termination of the check the release is granted.
For switching the de-energized component 1 to the energized component 2 or connecting the de-energized
component 1 to the equally de-energized component 2 the conditions to be fulfilled correspond with those
stated above.
The associated indications displaying the enabling via the corresponding condition are
Sync. U1> U2< ,
Sync. U1< U2> and Sync. U1< U2< .
Via binary inputs >Sync U1>U2< , >Sync U1<U2> and >Sync U1<U2< the enabling conditions can be
issued externally also provided the synchronization is controlled externally.
Parameter TSUP VOLTAGE (address 6111) can be set to configure a monitoring time which requires the
above stated additional enabling conditions at least to be present for de-energized switching, before switching
is allowed.
Blocking
Blocking the entire synchronizing function 1 is possible via binary input
>BLOCK Sy1 . The message signaling
this condition is made via
Sy1 BLOCK . When blocking the measurement is terminated and the entire function
is reset. A new measurement can only be performed with a new measurement request.
Via binary input >BLK Sync CLOSE it is possible to only block the release signal for closing ( Sync Clos-
eRel 1
). When blocking is active, measurement continues. The blocking is indicated by the message Sync.
CLOSE BLK . When blocking is reset and release conditions are fulfilled, the release signal for closing is issued.
Functions
2.2 Paralleling Functions
48 SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017

Siemens SIPROTEC 4 7VE61 Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7VE61
Category	Power distribution unit
Language	English