Siemens SIPROTEC 7SD610 Manual page 134

Functions
2.10 Automatic Reclosure Function (optional)
CLOSE Command Transmission (Remote-CLOSE)
With close command transmission via the digital connection path the dead times are only set at one line end.
The other end is set to "Adaptive Dead Time (ADT)". The latter only react to the received close commands from
the transmitting end. An adaptive dead time is thus possible even without a voltage.
At the sending line end, the transmission of the close command is delayed until it is sure that the local reclosure
was successful. This means that the device waits whether a local pickup still occurs after reclosing. This delay
prevents unnecessary closing at the remote end on the one hand but also increases the time until reclosure
takes place there. This is not critical for a 1-pole interruption or in radial or meshed networks if no stability prob-
lems are expected under these conditions.
Figure 2-47
The close command can be transmitted by a teleprotection scheme using the protection data interfaces. When
the indication „AR Remote Close" is output, this information is transmitted at the same time to the remote
end via the protection data interface. The information is OR-combined with the information of the binary input
„>AR RemoteClose" and made available to the automatic reclosure. (Figure 2-47).
Connecting an External Auto-Reclosure Device
If the 7SD610 has to work with an external reclosure device, the binary inputs and outputs provided for this
purpose must be taken into consideration. The following inputs and outputs are recommended:
Binary inputs:
381 „>1p Trip Perm"
Binary outputs:
501 „Relay PICKUP"
512 „Relay TRIP 1pL1"
513 „Relay TRIP 1pL2"
514 „Relay TRIP 1pL3"
515 „Relay TRIP 3ph."
In order to obtain a phase-segregated trip indication, the respective 1-pole trip commands must be combined
with the 3-pole trip command on one output.
Figure 2-48 for example, shows the interconnection between a 7SD610 and an external reclosure device with
a mode selector switch.
134
AR Remote-Close function via protection data interface
The external reclosure device allows 1-pole tripping (logic inversion or 3-
pole coupling). If this input is not assigned or not routed (matrix), the protec-
tion functions trip 3-pole for all faults. If the external reclosure device cannot
supply this signal but supplies a „3-pole coupling" signal instead, this must
be taken into account in the allocation of the binary inputs: the signal must
be inverted in this case (L-active = active without voltage).
Start of protection device, general (if required by external recloser device).
Trip of the device 1-pole L1.
Trip of the device 1-pole L2.
Trip of the device 1-pole L3.
Trip of the device 3-pole.
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011