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MS90376-12Y模块卡件
拾取当前设置“I设置”如果BFP电流检测器拾取设置过低，则存在在成功跳闸断路器后，探测器可能复位太晚。这可能是由以下原因造成的：c.t.次级侧的阻尼振荡。
另一方面，如果设置过高，BFP可能无法例如，如果电流低于拾波，则完全不工作
再次由于严重的c.t.饱和。拾取电流的典型设置刚好低于可能发生的最小故障电流在相应的线路上。检查死区时间在调试自动重合闸功能时，仅检查保护功能的组合操作是不够的，
自动重合闸功能和断路器，导致死区还必须确定时间。
因为死区时间设置与有效时间不对应总死区时间，特别是在有两个断路器的方案中
（见图3.5.32.17），断路器必须测量实际打开的。这需要调整
直到测量断路器时间减去电弧和预点火时间的死区时间以及不可避免的CB公差导致足够的复合死区时间。
如果线路两端的断路器为相同类型，因此允许假设相同的公差在两端，可以在两个终端站中设置相同的死区时间tp。如果不是这种情况，跳闸和闭合除死区时间外，还必须测量两个断路器的时间。为两个自动重合闸功能设置的死区时间必须确保存在“重叠”死区时间，使断路器能够神化。断路器故障保护（断路器故障）
应用
冗余跳闸方案（红色1））重复跳闸尝试（BFP 2））
备用跳闸（BFP）
端部故障保护（EFP 3））
无条件跳闸（UT 4））。外部跳闸启动。
B、 特征
对直流分量不敏感
对谐波不敏感单相或三相运行
阻塞
两个独立定时器（t1、t2）转换跳闸
提供禁用功能（红色、BFP、EFP、UT）
每个二进制输入和输出的唯一ID。
Pick-up current setting “I Setting”
If the BFP current detector pick-up setting is too low, there is a
possibility that the detectors may reset too late after it has successfully tripped the circuit-breaker. This can be caused by
damped oscillations on the secondary side of the c.t.
On the other hand, if the setting is too high, the BFP may fail to
operate at all should, for example, the current fall below pick-up
again due to severe c.t. saturation. A typical setting for the pickup current is just below the minimum fault current that can occur
on the respective line.Checking the dead times
When commissioning the auto-reclosure function, it is not sufficient to check the combined operation of protection function,
auto-reclosure function and circuit-breaker, the resulting dead
times must also be determined.
Since the dead time settings do not correspond to the effective
total dead times, especially in a scheme with two circuit-breakers
(see Fig. 3.5.32.17), the period during which the circuit-breaker
is actually open must be measured. This entails adjusting the
dead time until the measured breaker time minus arcing and preignition times and the inevitable CB tolerances result in an adequate composite dead time.
Providing the circuit-breakers at both ends of the line are of the
same type and thus permit the same tolerances to be assumed
at both ends, the same dead time tp can be set in the two terminal stations. Where this is not the case, the tripping and closing
times of the two circuit-breakers must also be measured in addition to the dead times. The dead times set for the two autoreclosure functions must then ensure that a sufficiently long
“overlapping” dead time exists to enable the circuit-breakers to
deionise.Breaker failure protection (BreakerFailure)
A. Application
Redundant tripping schemes (RED 1))
Repeated tripping attempts (BFP 2))
Backup tripping (BFP)
End fault protection (EFP 3))
Unconditional tripping (UT 4)).
External trip initiation.
B. Features
insensitive to DC component
insensitive to harmonics
single or three-phase operation
blocking
two independent timers (t1, t2)
transfer tripping
provision for disabling features (RED, BFP, EFP, UT)
unique ID for each binary input and output.
