ABB Relion 670 Series Product Manual page 29

Bay control REC670
Version 2.2
depending on the type of the fault and the selected auto
reclosing mode.
Several auto reclosing functions can be provided for
multi-breaker arrangements. A priority circuit allows one
circuit breaker to reclose first and the second will only
close if the fault proved to be transient.
Each auto reclosing function can be configured to co-
operate with the synchrocheck function.
Apparatus control APC
The apparatus control functions are used for control and
supervision of circuit breakers, disconnectors and
earthing switches within a bay. Permission to operate is
given after evaluation of conditions from other
functions such as interlocking, synchrocheck, operator
place selection and external or internal blockings.
Apparatus control features:
• Select-Execute principle to give high reliability
• Selection function to prevent simultaneous operation
• Selection and supervision of operator place
• Command supervision
• Block/deblock of operation
• Block/deblock of updating of position indications
• Substitution of position and quality indications
• Overriding of interlocking functions
• Overriding of synchrocheck
• Operation counter
• Suppression of mid position
Two types of command models can be used:
• Direct with normal security
• SBO (Select-Before-Operate) with enhanced security
Normal security means that only the command is
evaluated and the resulting position is not supervised.
Enhanced security means that the command is
evaluated with an additional supervision of the status
value of the control object. The command sequence with
enhanced security is always terminated by a
CommandTermination service primitive and an
AddCause telling if the command was successful or if
something went wrong.
Control operation can be performed from the local HMI
with authority control if so defined.
Features of the apparatus control function are:
• Operation of primary apparatuses
• Select-Execute principle to give high reliability
• Selection and reservation function to prevent
simultaneous operation
• Selection and supervision of operator place
• Command supervision
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M13444-3 v16
M16909-3 v3
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• Block/deblock of operation
• Block/deblock of updating of position indications
• Substitution of position indications
• Overriding of interlocking functions
• Overriding of synchrocheck
• Pole discordance supervision
• Operation counter
The apparatus control function is realized by means of a
number of function blocks designated:
• Bay control QCBAY
• Switch controller SCSWI
• Circuit breaker SXCBR
• Circuit switch SXSWI
The three latter functions are logical nodes according to
IEC 61850-8-1. To realize the reservation function also
the function blocks Reservation input (RESIN) and Bay
reserve (QCRSV) are included in the apparatus control
function.
Interlocking
The interlocking function blocks the possibility to
operate primary switching devices, for instance when a
disconnector is under load, in order to prevent material
damage and/or accidental human injury.
Each apparatus control function has interlocking
modules included for different switchyard
arrangements, where each function handles interlocking
of one bay. The interlocking function is distributed to
each IED and is not dependent on any central function.
For the station-wide interlocking, the IEDs communicate
via the system-wide interbay bus (IEC 61850-8-1) or by
using hard wired binary inputs/outputs. The
interlocking conditions depend on the circuit
configuration and apparatus position status at any
given time.
For easy and safe implementation of the interlocking
function, the IED is delivered with standardized and
tested software interlocking modules containing logic
for the interlocking conditions. The interlocking
conditions can be altered, to meet the customer's
specific requirements, by adding configurable logic by
means of the graphical configuration tool.
The following interlocking modules are available:
• Line for double and transfer busbars, ABC_LINE
• Bus coupler for double and transfer busbars, ABC_BC
• Transformer bay for double busbars, AB_TRAFO
• Bus-section breaker for double busbars, A1A2_BS
• Bus-section disconnector for double busbars,
A1A2_DC
1MRK 511 404-BEN N
M13531-3 v4
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