Ar Inhibit, Ar On Input, Start Ar; Bactrl (Basic Angle Control); Logic Input 1; Interlocking - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
5.1.14.
5.1.15.
5.1.16.
5.2.
5.2.1.
64
Protection Relay
Technical Reference Manual, Standard Configurations

AR inhibit, AR on input, start AR

Auto-reclosure function O->I can be started, inhibited or turned on via DI1...DI9.

BACTRL (Basic angle control)

The basic angle of the directional operation depends on the earthing principle of the
network. Basic angle can be changed via control signal BACTRL.

Logic input 1...3

The logical inputs 1...3 are part of the interlocking options for close enabling of the
breaker. These signals can be connected to any of the digital inputs DI1...DI9 and
they can get indication from such signals as SF6 gas alarm, spring charge etc. (see
Fig. 5.2.1.-5).

Interlocking

Closing the circuit breaker (CB) is permitted by the CLOSEENA input of the
I<->O CB1 function block. Different kinds of logics for permitting close operations
can be built by using the interlocking logic described in Fig. 5.2.-1 and
Fig. 5.2.1.-4.
The logic states of an earth switch (ES), a disconnector (DC), and general digital
inputs (DI1...DI9) can be used together with the interlocking logic in Fig. 5.2.-1.
CB pos. open
CB pos. close
DI
DI1
DI2
Selector
...
DI9
)LJ  ,QWHUORFNLQJ

Interlocking options

The interlocking options include only the closing of the circuit breaker. The opening
of the circuit breaker is always allowed. The settings are made via the HMI or the
Relay Setting Tool in a menu (Main menu\Configuration\Input
Signals\Close enable) where it is possible to manually set the interlocking
to TRUE or to Not connected (FALSE).
1. Standard configuration specific
Close enable
Selector
ES pos. open
Interlocking_A
ES pos. close
Interlocking_B
DC pos. open
Interlocking_C
DC pos. close
Interlocking_D
Logic input 1
Interlocking_E
Logic input 2
Logic input 3
1MRS 751802-MUM
1
1
1<-->0 CB
CB
CLOSEENA
&
L o c k o u t w o r k i n g