ABB REX 521, Техническое справочное руководство, стандартные конфигурации

Страница: 100 / 250

100
1MRS751802-MUM Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
The AR function is initiated internally from the protection functions or externally
with the digital inputs. The initiation signals are selected in the input SWGRP.
Activation and alarm signals can be routed to the output relays via the output
SWGRP selection.
The re-open (ROPEN) signal is connected directly to the HSPO1. The reclose signal
is routed to the close signal which can be connected to the output relays. The reclose
signal is depended on the interlocking scheme chosen for the control (COCB)
function. (See Fig. 7.1.10.-2.) Note that the open and the trip signal always overrides
the reclose and the close signal.
Sometimes it can be useful to get indications on the display cleared after a successful
auto-reclosing. This can be done by selecting O->I in input SWGRP Reset
indication. By default this option is disabled.
Auto-reclosure function, O->I
Number of reclosures
Initiation mode
AR1, AR2, AR3, AR4 starting line operation
mode
AR1 AR2, AR3, AR4 start delay
Dead time
Synchro-check
Discriminating time td
0…5
Trip
Start
No operation
AR shot initiated
Initiation of AR shot blocked
0…10.00 s
0.20…300.00 s
Not in use; ARSYNC in use
0…30.00 s
Operation accuracy ±1% of setting value or ±30 ms
CB open and CB close via the auto-reclose function are disabled in
REX 521.