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HONEYWELL 05701-A-0550加密狗钥匙
断路器故障时的定时：（1） 已发生故障并已由保护装置检测到。（2） 在机组保护运行时间后，跳闸命令传输至断路器，同时启动BFP。跳闸命令可以是单个（启动Lx）或三相（从L1L2L3开始）。冗余信号还包括：同时激活。（3） 断路器断开故障电流。（4） 在复位延迟tReset加上安全裕度tMargin之后
BFP检测到故障电流已中断，保护功能复位，或者故障电流继续流动，并由
BFP使断路器跳闸。（5） 第二次尝试跳闸断路器成功并且故障电流被中断。在进一步的复位延迟tReset加上安全裕度tMargin之后，BFP检测到故障电流已中断，保护功能复位，或者故障电流继续流动，BFP启动备用跳闸。如果仅要求BFP执行单个断路器故障步骤，可以禁用定时器t1（参见“t1激活”）。答复BFP再次对应于图3.5.33.1，但带有计时器1设置为零。
无条件跳闸情况下的时间安排：
（1） 已发生故障并已由保护装置检测到。（2） 输入“Ext Start”处的信号启动UT功能。
（3） 断路器断开故障电流。（4） 如果在复位延迟tReset加上安全裕度tMargin之后
断路器辅助触点“断路器接通”仍向UT发出信号CB关闭时，UT功能进行第二次尝试使断路器跳闸。
（5） 第二次尝试跳闸断路器成功并且故障电流被中断。
（6） 如果在进一步复位延迟tReset加上安全裕度tMargin之后
断路器辅助触点“断路器接通”仍向UT发出信号：断路器闭合，备用跳闸由UT启动
作用端区故障的时序图（1） 应用于断路器的跳闸命令。（2） 断路器辅助触点发出断路器断开的信号
用于启动的功能的“CB Off”输入EFP。
（3） 断路器断开故障电流。（4） 在复位延迟加上安全裕度后，电流单元或检测到故障电流已中断，或
EFP功能复位，或故障电流继续并发出EFP信号。
断路器打开断路器关闭复位tEFP t tt+t边缘tCB断开CB断开时间，包括灭弧时间
断路器辅助触点的tCB断开断路器断开时间（信号“断路器打开”）t设置电流检测器的复位时间3）t正常故障清除时间变化的余量4）
Timing in the case of breaker failure:
(1) A fault has occurred and been detected by a protective device.
(2) A tripping command is transmitted to the circuit-breaker after the unit protection operating time which also starts the
BFP. The tripping command can be either single (Start Lx) or
three-phase (Start L1L2L3). The redundant signals are also
activated at the same time.
(3) The circuit-breaker ruptures the fault current.
(4) After the reset delay tReset plus a safety margin tMargin , the
BFP either detects that the fault current has been interrupted and the protection function resets, or the fault current continues to flow and a second attempt is made by the
BFP to trip the circuit-breaker.
(5) The second attempt to trip the circuit-breaker is successful
and the fault current is interrupted.After a further reset delay tReset plus a safety margin tMargin ,
the BFP either detects that the fault current has been interrupted and the protection function resets, or the fault current continues to flow and the BFP initiates backup tripping.
If the BFP is only required to carry out a single breaker failure
step, timer t1 can be disabled (see ‘t1 active’). The response of
the BFP corresponds once again to Fig. 3.5.33.1, but with timer
t1 set to zero.
Timing in the case of an unconditional trip:
(1) A fault has occurred and been detected by a protective device.
(2) A signal at input ‘Ext Start’ starts the UT function.
(3) The circuit-breaker ruptures the fault current.
(4) If after the reset delay tReset plus a safety margin tMargin , the
CB auxiliary contact “CB On” still signals to the UT that the
CB is closed, a second attempt is made by the UT function
to trip the circuit-breaker.
(5) The second attempt to trip the circuit-breaker is successful
and the fault current is interrupted.
(6) If after a further reset delay tReset plus a safety margin tMargin
the CB auxiliary contact “CB On” still signals to the UT that
the CB is closed, backup tripping is initiated by the UT
function.Timing diagram for an end zone fault
(1) Tripping command applied to the CB.
(2) CB auxiliary contact sends a signal that the CB is open to
the “CB Off” input of the function which is used to start the
EFP.
(3) The circuit-breaker ruptures the fault current.
(4) After a reset delay plus a safety margin, the current unit either detects that the fault current has been interrupted and
the EFP function resets, or the fault current continues to
flow and an EFP signal is issued.
CB open CB Off Reset tEFP t t t + tMargin
tCB open CB opening time including arc extinction time
tCB Off CB opening time of the CB auxiliary contact
(Signal „CB open“)
tReset Reset time of the current detector 3)
tMargin Allowance for variations in normal fault clearing time 4)
