ABB REX 521, Техническое справочное руководство, стандартные конфигурации

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1MRS751802-MUM REX 521
111
Protection Relay
Technical Reference Manual, Standard Configurations
7.2. Control
7.2.1. I<->O CB1
The circuit-breaker function block is used for controlling the open and close
positions of a circuit breaker. The function block also takes care of the user-defined
interlocking logics and has guaranteed opening and closing pulse widths and forced
open control operations for protection purposes. The open, close and undefined
states of an object can be indicated remotely by the function block. Since the
function block is mainly designed for circuit breakers, it will issue specific alarm
signals based on the condition monitoring features.
Fig. 7.2.1.-1 Function block symbol of I<->O CB1
Start value U1< 0.01...1.20 x Un
Start value U1> 0.80...1.60 x Un
Operate time U2> 0.04...60.00 s
Operate time U1< 0.04...60.00 s
Operate time U1> 0.04...60.00 s
Note! The values below apply when
f/fn = 0.95...1.05:
Operation accuracies ±2.5% of set value or ±0.01 x Un
Start time U2> operation Injected negative sequence voltage = 1.1 x start value:
internal time <42 ms
total time <50 ms
Start time U1< operation Injected positive sequence voltage = 0.50 x start value:
internal time <32 ms
total time <40 ms
Start time U1> operation Injected positive sequence voltage = 1.1 x start value:
internal time <42 ms
total time <50 ms
Reset time 70...1030 ms (depends on the minimum pulse width set
for TRIP output)
Reset ratio U2> operation Typical 0.96 (range 0.90...0.98)
Reset ratio U1< operation Typical 1.04 (range 1.02...1.10)
Reset ratio U1> operation Typical 0.99
Retardation time Total retardation time when negative-/positive-sequence
voltage passes the start value: <45 ms
Operate time accuracy Depends on the frequency of the current measured:
f/fn = 0.95...1.05: ±2% of set value or ±20 ms
Phase sequence voltage protection (Continued)
1
↔0
CB1
OPEN
CLOSE
CLOSEENA
BINOPEN
BINCLOSE
OOPEN
OCLOSE
AOPEN
ACLOSE
COCB
1