Auto-Reclosing; Block Schematic Diagram (Modified 96-12) - ABB SPAC 531 C User Manual And Technical Description

Auto-reclosing

Block schematic
diagram
(modified 96-12)
4
The control module SPTO 6D3 is capable of
performing five auto-reclosings. Each auto-
reclose cycle can be started by three different
start initiation signals delivered by the protec-
tion relay modules of the feeder terminal. An
auto-reclose system can deliver an open com-
mand to the breaker. Thus either the starting
signal or the tripping signal of a particular
protection relay module can be used for starting
auto-reclose sequences.
Channels
1...7
Channels
8...17
Remote/local-
key switch
AR1,AR2,AR3
ARINH
Channel 10
SPTM
8A1
3I
3U
P (mA1)
Q (mA2)
E ( )
Channel 11
Fig. 1. Block schematic diagram for the control module SPTO 6D3 including an optional
measuring module SPTM 8A1.
In double busbar systems with two circuit break-
ers (duplex-systems) the auto-reclose function
includes a so called duplex logic, which routes
the closing command selectively to the circuit
breaker last closed.
The dead times of the different auto-reclose
cycles can be independently determined. The
reclaim time can also be determined by the user.
SPA-bus
Open/close
Ι
O
output
control
Indication
Read
status
Inter-
locking
Direct
Read
output
status
control
Indication
Chann.
8...13
Read
status
Signal
output
control
EXTAR
Chann.14
Auto-
reclose
Indication
Measure-
ment
t
&
Enable
1
SPA-bus
1
SPA-bus
&
SPA-bus
SPTO 6D3
Open1...6 /
Close1...6
Signal
5 or 6