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MS90376-12Y模塊卡件
拾取當(dāng)前設(shè)置“I設(shè)置”如果BFP電流檢測器拾取設(shè)置過低，則存在在成功跳閘斷路器后，探測器可能復(fù)位太晚。這可能是由以下原因造成的：c.t.次級(jí)側(cè)的阻尼振蕩。
另一方面，如果設(shè)置過高，BFP可能無法例如，如果電流低于拾波，則完全不工作
再次由于嚴(yán)重的c.t.飽和。拾取電流的典型設(shè)置剛好低于可能發(fā)生的最小故障電流在相應(yīng)的線路上。檢查死區(qū)時(shí)間在調(diào)試自動(dòng)重合閘功能時(shí)，僅檢查保護(hù)功能的組合操作是不夠的，
自動(dòng)重合閘功能和斷路器，導(dǎo)致死區(qū)還必須確定時(shí)間。
因?yàn)樗绤^(qū)時(shí)間設(shè)置與有效時(shí)間不對(duì)應(yīng)總死區(qū)時(shí)間，特別是在有兩個(gè)斷路器的方案中
（見圖3.5.32.17），斷路器必須測量實(shí)際打開的。這需要調(diào)整
直到測量斷路器時(shí)間減去電弧和預(yù)點(diǎn)火時(shí)間的死區(qū)時(shí)間以及不可避免的CB公差導(dǎo)致足夠的復(fù)合死區(qū)時(shí)間。
如果線路兩端的斷路器為相同類型，因此允許假設(shè)相同的公差在兩端，可以在兩個(gè)終端站中設(shè)置相同的死區(qū)時(shí)間tp。如果不是這種情況，跳閘和閉合除死區(qū)時(shí)間外，還必須測量兩個(gè)斷路器的時(shí)間。為兩個(gè)自動(dòng)重合閘功能設(shè)置的死區(qū)時(shí)間必須確保存在“重疊”死區(qū)時(shí)間，使斷路器能夠神化。斷路器故障保護(hù)（斷路器故障）
應(yīng)用
冗余跳閘方案（紅色1））重復(fù)跳閘嘗試（BFP 2））
備用跳閘（BFP）
端部故障保護(hù)（EFP 3））
無條件跳閘（UT 4））。外部跳閘啟動(dòng)。
B、 特征
對(duì)直流分量不敏感
對(duì)諧波不敏感單相或三相運(yùn)行
阻塞
兩個(gè)獨(dú)立定時(shí)器（t1、t2）轉(zhuǎn)換跳閘
提供禁用功能（紅色、BFP、EFP、UT）
每個(gè)二進(jìn)制輸入和輸出的唯一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.
